$110+ Cheap flights from Missouri to Washington
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEA
Jun 16 — Jun 231
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Missouri to Washington with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Missouri to Washington
Cheapest
Best
Last-minute
One-way
Cheapest flights from Missouri to WashingtonExplore the most affordable flight options available from Missouri to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 17, 2026.
Explore the most affordable flight options available from Missouri to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/162:17 pm
MCI
- PDX
1 stop28h 18m
Frontier
Sun 9/203:22 pm
PDX
- MCI
1 stop20h 00m
Frontier
Deal found 5/13![Frontier logo]()
$228
This Booking.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:45 pm
MCI
- GEG
1 stop23h 52m
Frontier
Wed 7/1512:34 pm
GEG
- MCI
1 stop22h 21m
Frontier
Deal found 5/16![Frontier logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/122:17 pm
MCI
- PDX
1 stop28h 18m
Frontier
Mon 10/1912:34 pm
PDX
- MCI
1 stop22h 48m
Frontier
Deal found 5/14![Frontier logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/82:17 pm
MCI
- PDX
1 stop28h 18m
Frontier
Tue 10/135:35 pm
PDX
- MCI
1 stop17h 47m
Frontier
Deal found 5/14![Frontier logo]()
$249
This CheapOair deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:17 pm
MCI
- PDX
1 stop28h 18m
Frontier
Sun 10/1812:34 pm
PDX
- MCI
1 stop22h 48m
Frontier
Deal found 5/13![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/172:17 pm
MCI
- PDX
1 stop28h 18m
Frontier
Sun 9/203:22 pm
PDX
- MCI
1 stop20h 00m
Frontier
Deal found 5/12![Frontier logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:17 pm
MCI
- PDX
1 stop28h 18m
Frontier
Tue 10/205:35 pm
PDX
- MCI
1 stop17h 47m
Frontier
Deal found 5/13![Frontier logo]()
$256
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/82:17 pm
MCI
- PDX
1 stop28h 18m
Frontier
Fri 10/1612:34 pm
PDX
- MCI
1 stop22h 48m
Frontier
Deal found 5/14![Frontier logo]()
$259
This CheapOair deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/61:50 pm
MCI
- PDX
1 stop6h 14m
Frontier
Sun 8/96:59 pm
PDX
- MCI
1 stop15h 56m
Frontier
Deal found 5/13![Frontier logo]()
$260
This Frontier deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:08 pm
STL
- SEA
1 stop19h 53m
Frontier
Wed 6/37:50 pm
SEA
- STL
1 stop21h 33m
Frontier
Deal found 5/12![Frontier logo]()
$261
This Booking.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/117:38 pm
STL
- GEG
1 stop17h 58m
Frontier
Wed 6/1712:31 pm
GEG
- STL
1 stop28h 22m
Frontier
Deal found 5/12![Frontier logo]()
$262
This Booking.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:17 pm
MCI
- PDX
1 stop28h 18m
Frontier
Mon 10/53:22 pm
PDX
- MCI
1 stop20h 00m
Frontier
Deal found 5/14![Frontier logo]()
$262
Best flights from Missouri to WashingtonDiscover carefully curated flight deals from Missouri to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 17, 2026.
Discover carefully curated flight deals from Missouri to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 17, 2026.
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:43 pm
SGF
- PDX
1 stop6h 24m
American Airlines
Sat 8/1511:20 pm
PDX
- SGF
1 stop8h 43m
American Airlines
Deal found 5/13![American Airlines logo]()
$313
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:18 pm
STL
- PDX
1 stop9h 28m
Delta
Sun 9/66:00 am
PDX
- STL
1 stop5h 21m
Delta
Deal found 5/13![Delta logo]()
$319
This Southwest deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:40 pm
STL
- PDX
1 stop6h 05m
Southwest
Thu 7/1611:30 pm
PDX
- STL
1 stop7h 40m
Southwest
Deal found 5/14![Southwest logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:08 pm
STL
- PDX
Nonstop4h 12m
Alaska Airlines
Mon 8/3111:16 am
PDX
- STL
Nonstop3h 54m
Alaska Airlines
Deal found 5/16![Alaska Airlines logo]()
$319
This United Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/304:26 pm
MCI
- PDX
2 stops8h 37m
United Airlines
Tue 6/212:50 pm
PDX
- MCI
1 stop5h 53m
United Airlines
Deal found 5/16![United Airlines logo]()
$334
This Southwest deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:30 pm
STL
- PDX
1 stop7h 25m
Southwest
Thu 8/611:30 pm
PDX
- STL
1 stop9h 00m
Southwest
Deal found 5/16![Southwest logo]()
$319
This United Airlines deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:53 pm
JLN
- SEA
1 stop5h 53m
United Airlines
Tue 10/278:30 am
SEA
- JLN
1 stop6h 41m
United Airlines
Deal found 5/15![United Airlines logo]()
$344
This Delta deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:40 am
SGF
- SEA
1 stop9h 19m
Delta
Tue 10/2711:35 pm
SEA
- SGF
1 stop9h 36m
Delta
Deal found 5/15![Delta logo]()
$349
This Southwest deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/236:30 pm
STL
- PDX
1 stop7h 25m
Southwest
Fri 7/319:20 pm
PDX
- STL
1 stop8h 50m
Southwest
Deal found 5/13![Southwest logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/125:59 pm
STL
- PDX
Nonstop4h 10m
Alaska Airlines
Sat 9/195:05 am
PDX
- STL
1 stop7h 16m
Alaska Airlines
Deal found 5/13![Alaska Airlines logo]()
$354
This Southwest deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/95:25 pm
MCI
- PDX
1 stop8h 30m
Southwest
Thu 8/1311:30 pm
PDX
- MCI
1 stop6h 15m
Southwest
Deal found 5/16![Southwest logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:12 pm
MCI
- PDX
Nonstop3h 58m
Alaska Airlines
Tue 10/203:48 pm
PDX
- MCI
1 stop6h 11m
Alaska Airlines
Deal found 5/13![Alaska Airlines logo]()
$368
This Delta deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:00 am
MCI
- SEA
Nonstop4h 06m
Delta
Wed 7/155:30 pm
SEA
- MCI
Nonstop3h 30m
Delta
Deal found 5/15![Delta logo]()
$387
This Southwest deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:05 pm
MCI
- PDX
1 stop7h 05m
Southwest
Wed 6/32:20 pm
PDX
- MCI
1 stop5h 55m
Southwest
Deal found 5/13![Southwest logo]()
$329
This United Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1110:48 am
COU
- SEA
1 stop7h 21m
United Airlines
Wed 6/178:45 am
SEA
- COU
2 stops12h 48m
United Airlines
Deal found 5/13![United Airlines logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/185:37 pm
STL
- GEG
1 stop7h 22m
Alaska Airlines
Wed 8/198:30 am
GEG
- STL
1 stop6h 40m
Alaska Airlines
Deal found 5/16![Alaska Airlines logo]()
$384
This American Airlines deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/28:00 am
STL
- GEG
1 stop8h 02m
American Airlines
Thu 8/1312:53 pm
GEG
- STL
1 stop8h 49m
American Airlines
Deal found 5/17![American Airlines logo]()
$472
This Delta deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/166:23 am
MCI
- SEA
1 stop8h 35m
Delta
Tue 6/235:30 pm
SEA
- MCI
Nonstop3h 36m
Delta
Deal found 5/16![Delta logo]()
$397
This Southwest deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:35 am
MCI
- PDX
2 stops9h 50m
Southwest
Tue 8/251:05 pm
PDX
- MCI
1 stop7h 15m
Southwest
Deal found 5/15![Southwest logo]()
$334
This Alaska Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/62:51 pm
MCI
- SEA
Nonstop4h 03m
Alaska Airlines
Wed 6/106:27 pm
SEA
- MCI
Nonstop3h 32m
Alaska Airlines
Deal found 5/16![Alaska Airlines logo]()
$392
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:15 am
MCI
- SEA
Nonstop3h 57m
Delta
Sun 8/2312:36 pm
SEA
- MCI
1 stop8h 56m
Delta
Deal found 5/13![Delta logo]()
$397
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:16 pm
COU
- SEA
1 stop9h 13m
United Airlines
Sat 10/3111:00 am
SEA
- COU
1 stop8h 20m
United Airlines
Deal found 5/12![United Airlines logo]()
$438
This Southwest deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/193:40 pm
MCI
- PDX
2 stops8h 25m
Southwest
Mon 6/226:00 pm
PDX
- MCI
1 stop5h 40m
Southwest
Deal found 5/16![Southwest logo]()
$358
This Delta deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/57:26 am
MCI
- SEA
1 stop9h 14m
Delta
Mon 8/105:30 pm
SEA
- MCI
Nonstop3h 32m
Delta
Deal found 5/14![Delta logo]()
$397
This Alaska Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:52 pm
MCI
- GEG
1 stop16h 36m
Alaska Airlines
Mon 6/87:25 pm
GEG
- MCI
1 stop19h 32m
Alaska Airlines
Deal found 5/16![Alaska Airlines logo]()
$398
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/138:52 am
JLN
- SEA
1 stop8h 57m
United Airlines
Tue 11/178:30 am
SEA
- JLN
1 stop6h 41m
United Airlines
Deal found 5/12![United Airlines logo]()
$444
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/284:55 pm
MCI
- PDX
1 stop9h 15m
Southwest
Mon 6/110:45 am
PDX
- MCI
2 stops10h 05m
Southwest
Deal found 5/12![Southwest logo]()
$358
This Delta deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/137:00 am
MCI
- SEA
Nonstop4h 06m
Delta
Sat 6/202:30 pm
SEA
- MCI
1 stop5h 32m
Delta
Deal found 5/16![Delta logo]()
$397
This United Airlines deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/243:05 pm
SGF
- PDX
1 stop9h 44m
United Airlines
Sun 9/276:56 am
PDX
- SGF
1 stop9h 25m
United Airlines
Deal found 5/15![United Airlines logo]()
$449
This Alaska Airlines deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/227:00 am
MCI
- GEG
1 stop8h 42m
Alaska Airlines
Sun 9/275:09 am
GEG
- MCI
1 stop5h 29m
Alaska Airlines
Deal found 5/16![Alaska Airlines logo]()
$415
Last-minute flights from Missouri to WashingtonDiscover last-minute flight deals from Missouri to Washington. Data last updated May 17, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Washington. Data last updated May 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:23 pm
STL
- SEA
1 stop7h 50m
United Airlines
Thu 5/283:40 pm
SEA
- STL
1 stop6h 17m
United Airlines
Deal found 5/12![United Airlines logo]()
$293
This Mytrip deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/282:34 pm
MCI
- GEG
1 stop23h 04m
Frontier
Mon 6/112:33 pm
GEG
- MCI
1 stop23h 16m
Frontier
Deal found 5/12![Frontier logo]()
$289
This CheapOair deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/282:34 pm
MCI
- PDX
1 stop28h 12m
Frontier
Mon 6/112:35 pm
PDX
- MCI
1 stop23h 14m
Frontier
Deal found 5/13![Frontier logo]()
$290
This Booking.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/32:34 pm
MCI
- PDX
1 stop28h 12m
Frontier
Fri 6/512:35 pm
PDX
- MCI
1 stop23h 14m
Frontier
Deal found 5/14![Frontier logo]()
$282
This Gotogate deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/42:34 pm
MCI
- PDX
1 stop28h 12m
Frontier
Mon 6/812:35 pm
PDX
- MCI
1 stop22h 25m
Frontier
Deal found 5/13![Frontier logo]()
$280
This CheapOair deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/42:34 pm
MCI
- PDX
1 stop28h 12m
Frontier
Sun 6/712:35 pm
PDX
- MCI
1 stop23h 14m
Frontier
Deal found 5/13![Frontier logo]()
$305
This Expedia deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/55:33 pm
STL
- PDX
Nonstop4h 17m
Multiple Airlines
Mon 6/811:15 am
PDX
- STL
1 stop6h 56m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$299
This Booking.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/52:34 pm
MCI
- SEA
1 stop21h 32m
Frontier
Sun 6/77:50 pm
SEA
- MCI
1 stop15h 59m
Frontier
Deal found 5/12![Frontier logo]()
$302
This Booking.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/117:38 pm
STL
- GEG
1 stop17h 58m
Frontier
Wed 6/1712:31 pm
GEG
- STL
1 stop28h 22m
Frontier
Deal found 5/12![Frontier logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/241:45 pm
MCI
- SEA
1 stop22h 03m
Frontier
Tue 6/307:41 pm
SEA
- MCI
1 stop11h 06m
Frontier
Deal found 5/12![Frontier logo]()
$307
This CheapOair deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/301:45 pm
MCI
- PDX
1 stop28h 50m
Frontier
Sat 7/412:26 pm
PDX
- MCI
1 stop22h 29m
Frontier
Deal found 5/12![Frontier logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/301:45 pm
MCI
- PDX
1 stop28h 50m
Frontier
Tue 7/75:16 pm
PDX
- MCI
1 stop17h 39m
Frontier
Deal found 5/12![Frontier logo]()
$292
One-way flights from Missouri to WashingtonSearch for one-way flight options from Missouri to Washington. Find affordable one-way fares based on user searches. Data last updated May 17, 2026.
Search for one-way flight options from Missouri to Washington. Find affordable one-way fares based on user searches. Data last updated May 17, 2026.
This Super.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/238:08 pm
STL
- SEA
1 stop15h 40m
Frontier
Deal found 5/12![Frontier logo]()
$110
This Super.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/272:34 pm
MCI
- SEA
1 stop21h 32m
Frontier
Deal found 5/12![Frontier logo]()
$119
This Super.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/161:45 pm
MCI
- SEA
1 stop22h 03m
Frontier
Deal found 5/16![Frontier logo]()
$120
This Frontier deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/92:17 pm
MCI
- SEA
1 stop12h 10m
Frontier
Deal found 5/12![Frontier logo]()
$121
This Trip.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/141:45 pm
MCI
- SEA
1 stop22h 04m
Frontier
Deal found 5/14![Frontier logo]()
$123
This Frontier deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/61:50 pm
MCI
- PDX
1 stop6h 14m
Frontier
Deal found 5/12![Frontier logo]()
$125
This Mytrip deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:17 pm
MCI
- SEA
1 stop21h 34m
Frontier
Deal found 5/15![Frontier logo]()
$125
This Booking.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/91:45 pm
MCI
- GEG
1 stop23h 51m
Frontier
Deal found 5/14![Frontier logo]()
$126
This CheapOair deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:17 pm
MCI
- PDX
1 stop28h 18m
Frontier
Deal found 5/13![Frontier logo]()
$126
This Booking.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/32:17 pm
MCI
- SEA
1 stop21h 34m
Frontier
Deal found 5/13![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/125:06 pm
STL
- PDX
2 stops46h 42m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$128
This Frontier deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/101:50 pm
MCI
- PDX
1 stop6h 14m
Frontier
Deal found 5/16![Frontier logo]()
$129
Find flight deals from Missouri to Washington
Keep the following information in mind while searching for Missouri to Washington flight deals. Data was last updated May 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $228 (Kiwi.com) |
One-way from | $110 (Super.com) |
Popular in | July |
Cheapest in | February |
Average price | $388 |
Good round-trip deal | $405 or less |
Good one-way deal | $228 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Missouri to Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 17, 2026.
Use the filters below to find and compare flights from Missouri to Washington that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SpringfieldPortland
SGF - PDX
SGFPDX
Springfield-Branson
Wed 8/12
6:43 pm-11:07 pm
1 stop6h 24m
Portland
Sat 8/15
11:20 pm-10:03 am
1 stop8h 43m
$313
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Mon 8/31
2:18 pm-9:46 pm
1 stop9h 28m
Portland
Sun 9/6
6:00 am-1:21 pm
1 stop5h 21m
$319
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Mon 7/13
6:40 pm-10:45 pm
1 stop6h 05m
Portland
Thu 7/16
11:30 pm-9:10 am
1 stop7h 40m
$319
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 8/27
6:08 pm-8:20 pm
Nonstop4h 12m
Portland
Mon 8/31
11:16 am-5:10 pm
Nonstop3h 54m
$319
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Mon 8/3
6:30 pm-11:55 pm
1 stop7h 25m
Portland
Thu 8/6
11:30 pm-10:30 am
1 stop9h 00m
$319
St. LouisPortland
STL - PDX
STLPDX
Lambert-St Louis
Thu 7/23
6:30 pm-11:55 pm
1 stop7h 25m
Portland
Fri 7/31
9:20 pm-8:10 am
1 stop8h 50m
$319
Kansas CityPortland
MCI - PDX
MCIPDX
Kansas City
Thu 7/9
5:25 pm-11:55 pm
1 stop8h 30m
Portland
Thu 8/13
11:30 pm-7:45 am
1 stop6h 15m
$329
Kansas CityPortland
MCI - PDX
MCIPDX
Kansas City
Thu 5/28
7:05 pm-12:10 am
1 stop7h 05m
Portland
Wed 6/3
2:20 pm-10:15 pm
1 stop5h 55m
$329
Kansas CityPortland
MCI - PDX
MCIPDX
Kansas City
Sat 5/30
4:26 pm-11:03 pm
2 stops8h 37m
Portland
Tue 6/2
12:50 pm-8:43 pm
1 stop5h 53m
$334
Kansas CityPortland
MCI - PDX
MCIPDX
Kansas City
Tue 8/18
7:35 am-3:25 pm
2 stops9h 50m
Portland
Tue 8/25
1:05 pm-10:20 pm
1 stop7h 15m
$334
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Missouri to Washington
Have a flexible travel schedule? Discover the best time to fly to Washington from Missouri with our price prediction graph.
MCI-PDX
STL-GEG
MCI-GEG
STL-SEA
STL-PDX
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Missouri to Washington
USMO-USWA
MCI-PDX
STL-GEG
MCI-GEG
STL-SEA
How far ahead should I book a flight from Missouri to State of Washington?
To ensure you get the cheapest price possible for a flight from Missouri to State of Washington, you should look to book at least 52 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Missouri to State of Washington?
Currently, March is the cheapest month in which you can book a flight from Missouri to State of Washington (average of $80). Flying from Missouri to State of Washington in September is currently the most expensive (average of $682). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from MO to WA?
Find hourly flight availability from Missouri to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 17, 2026.
It’s typically best to fly out from Missouri to State of Washington in the evening. Doing so could potentially save you 18% on the flight price compared to flying in the morning, which is usually more expensive.
What is the cheapest day to fly from Missouri to State of Washington?
Use this chart to determine the cheapest time to fly round-trip from Missouri to Washington. Price data was last updated on May 16, 2026.
Travelers seeking maximum savings on their Missouri to State of Washington flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Missouri to State of Washington
Explore weekly flight availability from Missouri to Washington. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 17, 2026.
The most flights from USMO to USWA are scheduled on a Saturday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Missouri to State of Washington?
Reviews of airlines servicing Washington
Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated May 17, 2026.
Peruse reviews from past customers who have flown with Southwest,Alaska Airlines, andDelta from Missouri to Washington to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Missouri to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Return Flight Options
Top destinations
Alternative routes for Missouri to Washington
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Washington by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Missouri to Washington by cabin class
Find flights from Missouri to Washington, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Missouri and Washington flights
Browse other Missouri and Washington flight options. Last updated on May 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Washington
Find the right flight back to Missouri after your stay in Washington
Missouri to Washington flights
Consider these flights traveling from Missouri to Washington.
Top 7 airlines flying from Missouri to Washington
Discover the top 7 airlines that operate flights from Missouri to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$94 | Average$364 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$113 | Average$249 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$151 | Average$456 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$152 | Average$412 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$164 | Average$447 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$169 | Average$341 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$188 | Average$509 | FlexibilityNo cancel fee | On-time71% |