$79+ Cheap flights from Washington to Missouri
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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STL
Jun 5 — Jun 121
Round-trip
1 adult, Economy
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1. Tell us where you want to go
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Cheapest flights from Washington to MissouriExplore the most affordable flight options available from Washington to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 6, 2026.
Explore the most affordable flight options available from Washington to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 6/1112:26 pm
PDX
- MCI
1 stop22h 34m
Frontier
Tue 6/301:45 pm
MCI
- PDX
1 stop28h 50m
Frontier
Deal found 5/2![Frontier logo]()
$215
This CheapOair deal was found by Cheapflights users on 5/3. 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 5/267:50 pm
SEA
- MCI
1 stop15h 59m
Frontier
Sat 6/201:45 pm
MCI
- SEA
1 stop22h 03m
Frontier
Deal found 5/3![Frontier logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 6/47:50 pm
SEA
- MCI
1 stop15h 59m
Frontier
Mon 6/82:34 pm
MCI
- SEA
1 stop21h 14m
Frontier
Deal found 5/3![Frontier logo]()
$228
This CheapOair deal was found by Cheapflights users on 5/5. 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 8/193:19 pm
SEA
- MCI
1 stop19h 41m
Frontier
Sat 8/221:45 pm
MCI
- SEA
1 stop22h 03m
Frontier
Deal found 5/5![Frontier logo]()
$234
This Delta deal was found by Cheapflights users on 5/5. 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 5/265:30 pm
SEA
- MCI
Nonstop3h 40m
Delta
Tue 6/27:05 am
MCI
- SEA
Nonstop4h 00m
Delta
Deal found 5/5![Delta logo]()
$237
This CheapOair deal was found by Cheapflights users on 5/6. 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 7/297:41 pm
SEA
- MCI
1 stop15h 14m
Frontier
Tue 8/111:45 pm
MCI
- SEA
1 stop22h 04m
Frontier
Deal found 5/6![Frontier logo]()
$240
This CheapOair deal was found by Cheapflights users on 5/1. 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 5/265:46 pm
PDX
- STL
1 stop23h 37m
Frontier
Thu 5/289:21 pm
STL
- PDX
1 stop14h 59m
Frontier
Deal found 5/1![Frontier logo]()
$240
This CheapOair deal was found by Cheapflights users on 5/3. 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.
Mon 6/17:50 pm
SEA
- MCI
1 stop15h 59m
Frontier
Mon 6/82:34 pm
MCI
- SEA
1 stop21h 14m
Frontier
Deal found 5/3![Frontier logo]()
$241
This CheapOair deal was found by Cheapflights users on 5/4. 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 6/1112:26 pm
PDX
- STL
1 stop28h 27m
Frontier
Wed 6/177:46 pm
STL
- PDX
1 stop26h 01m
Frontier
Deal found 5/4![Frontier logo]()
$241
This CheapOair deal was found by Cheapflights users on 5/2. 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.
Sun 5/1012:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Wed 5/206:51 pm
STL
- PDX
1 stop17h 29m
Frontier
Deal found 5/2![Frontier logo]()
$246
This Delta deal was found by Cheapflights users on 5/5. 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 5/295:30 pm
SEA
- MCI
Nonstop3h 40m
Delta
Mon 6/17:40 pm
MCI
- SEA
1 stop6h 30m
Delta
Deal found 5/5![Delta logo]()
$247
This CheapOair deal was found by Cheapflights users on 5/5. 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 5/2112:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Wed 5/278:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Deal found 5/5![Frontier logo]()
$250
Best flights from Washington to MissouriDiscover carefully curated flight deals from Washington to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 6, 2026.
Discover carefully curated flight deals from Washington to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 6, 2026.
This Delta deal was found by Cheapflights users on 5/5. 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 6/122:55 pm
SEA
- MCI
1 stop6h 54m
Delta
Tue 6/167:26 am
MCI
- SEA
1 stop7h 08m
Delta
Deal found 5/5![Delta logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 6/27:05 am
SEA
- STL
1 stop7h 32m
Alaska Airlines
Sat 6/67:41 pm
STL
- SEA
Nonstop4h 30m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$327
This Southwest deal was found by Cheapflights users on 5/5. 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 9/246:20 am
PDX
- MCI
1 stop8h 35m
Southwest
Sun 9/276:25 am
MCI
- PDX
1 stop6h 55m
Southwest
Deal found 5/5![Southwest logo]()
$327
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Fri 6/512:49 am
SEA
- SGF
1 stop7h 41m
American Airlines
Sat 6/137:30 pm
SGF
- SEA
1 stop7h 29m
American Airlines
Deal found 5/2![American Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 5/6. 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 6/34:15 pm
PDX
- SGF
1 stop5h 27m
United Airlines
Wed 6/104:49 pm
SGF
- PDX
1 stop7h 59m
United Airlines
Deal found 5/6![United Airlines logo]()
$366
This Delta deal was found by Cheapflights users on 5/5. 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 6/175:24 pm
PDX
- MCI
1 stop4h 54m
Delta
Wed 6/247:00 am
MCI
- PDX
1 stop6h 42m
Delta
Deal found 5/5![Delta logo]()
$327
This Southwest deal was found by Cheapflights users on 5/2. 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 6/235:20 pm
PDX
- MCI
2 stops13h 25m
Southwest
Fri 6/269:15 pm
MCI
- PDX
1 stop6h 05m
Southwest
Deal found 5/2![Southwest logo]()
$338
This Alaska Airlines deal was found by Cheapflights users on 5/2. 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 6/25:00 am
PDX
- MCI
1 stop6h 57m
Alaska Airlines
Fri 6/55:52 pm
MCI
- PDX
Nonstop3h 52m
Alaska Airlines
Deal found 5/2![Alaska Airlines logo]()
$362
This Southwest deal was found by Cheapflights users on 5/4. 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.
Wed 6/36:50 am
SEA
- STL
2 stops9h 05m
Southwest
Sat 6/64:00 pm
STL
- SEA
1 stop9h 30m
Southwest
Deal found 5/4![Southwest logo]()
$342
This Delta deal was found by Cheapflights users on 5/6. 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 6/195:30 pm
SEA
- MCI
Nonstop3h 36m
Delta
Mon 6/226:00 pm
MCI
- SEA
1 stop6h 05m
Delta
Deal found 5/6![Delta logo]()
$347
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 6/25:00 am
PDX
- MCI
1 stop6h 57m
Alaska Airlines
Wed 6/35:52 pm
MCI
- PDX
Nonstop3h 52m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$362
This United Airlines deal was found by Cheapflights users on 5/5. 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 7/234:18 pm
GEG
- MCI
1 stop5h 07m
United Airlines
Tue 7/2811:33 am
MCI
- GEG
1 stop5h 38m
United Airlines
Deal found 5/5![United Airlines logo]()
$401
This Delta deal was found by Cheapflights users on 5/6. 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.
Thu 6/2512:35 pm
SEA
- MCI
1 stop9h 14m
Delta
Sun 6/287:00 am
MCI
- SEA
Nonstop4h 06m
Delta
Deal found 5/6![Delta logo]()
$347
This Southwest deal was found by Cheapflights users on 5/4. 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 6/25:10 am
GEG
- STL
1 stop6h 20m
Southwest
Sat 6/63:50 pm
STL
- GEG
2 stops8h 10m
Southwest
Deal found 5/4![Southwest logo]()
$357
This United Airlines deal was found by Cheapflights users on 5/5. 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 6/28:56 am
SEA
- STL
2 stops10h 25m
United Airlines
Sat 6/67:23 pm
STL
- SEA
1 stop7h 50m
United Airlines
Deal found 5/5![United Airlines logo]()
$408
This Alaska Airlines deal was found by Cheapflights users on 5/4. 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.
Mon 6/17:05 am
SEA
- STL
1 stop7h 32m
Alaska Airlines
Wed 6/37:41 pm
STL
- SEA
Nonstop4h 30m
Alaska Airlines
Deal found 5/4![Alaska Airlines logo]()
$387
This Delta deal was found by Cheapflights users on 5/1. 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 5/274:59 pm
GEG
- MCI
1 stop5h 26m
Delta
Mon 6/17:40 pm
MCI
- GEG
1 stop5h 55m
Delta
Deal found 5/1![Delta logo]()
$357
This Southwest deal was found by Cheapflights users on 5/3. 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 6/26:50 am
SEA
- STL
2 stops9h 05m
Southwest
Thu 6/47:20 pm
STL
- SEA
1 stop8h 20m
Southwest
Deal found 5/3![Southwest logo]()
$367
This United Airlines deal was found by Cheapflights users on 5/2. 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 6/211:40 pm
PDX
- MCI
1 stop7h 02m
United Airlines
Wed 6/35:24 pm
MCI
- PDX
1 stop5h 46m
United Airlines
Deal found 5/2![United Airlines logo]()
$417
This Alaska Airlines deal was found by Cheapflights users on 5/1. 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.
Wed 5/2712:33 pm
PDX
- STL
1 stop9h 23m
Alaska Airlines
Sat 5/305:33 pm
STL
- PDX
Nonstop4h 17m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$387
This Delta deal was found by Cheapflights users on 5/5. 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 7/285:20 am
GEG
- MCI
1 stop6h 37m
Delta
Wed 8/56:01 pm
MCI
- GEG
1 stop7h 25m
Delta
Deal found 5/5![Delta logo]()
$363
This Southwest deal was found by Cheapflights users on 5/5. 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 8/35:20 pm
SEA
- STL
1 stop6h 30m
Southwest
Thu 8/66:00 pm
STL
- SEA
1 stop8h 40m
Southwest
Deal found 5/5![Southwest logo]()
$382
This Alaska Airlines deal was found by Cheapflights users on 5/4. 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 6/256:27 pm
SEA
- MCI
Nonstop3h 32m
Alaska Airlines
Sun 6/286:02 am
MCI
- SEA
Nonstop4h 03m
Alaska Airlines
Deal found 5/4![Alaska Airlines logo]()
$397
This Delta deal was found by Cheapflights users on 5/1. 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 5/2712:27 pm
GEG
- SGF
1 stop7h 52m
Delta
Fri 6/126:00 am
SGF
- GEG
1 stop7h 36m
Delta
Deal found 5/1![Delta logo]()
$364
This United Airlines deal was found by Cheapflights users on 5/4. 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 6/37:00 am
SEA
- MCI
1 stop6h 59m
United Airlines
Tue 6/97:59 pm
MCI
- SEA
1 stop7h 14m
United Airlines
Deal found 5/4![United Airlines logo]()
$447
This American Airlines deal was found by Cheapflights users on 5/6. 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.
Fri 6/1911:24 pm
SEA
- SGF
1 stop7h 35m
American Airlines
Sun 6/216:43 pm
SGF
- SEA
1 stop8h 16m
American Airlines
Deal found 5/6![American Airlines logo]()
$609
This Southwest deal was found by Cheapflights users on 5/5. 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 9/224:00 pm
PDX
- STL
1 stop5h 40m
Southwest
Thu 9/246:05 am
STL
- PDX
2 stops10h 55m
Southwest
Deal found 5/5![Southwest logo]()
$389
This Alaska Airlines deal was found by Cheapflights users on 5/1. 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 10/95:35 pm
PDX
- STL
1 stop18h 51m
Alaska Airlines
Sun 10/117:00 am
STL
- PDX
1 stop7h 22m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$407
This United Airlines deal was found by Cheapflights users on 5/3. 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 6/210:29 am
SEA
- MCI
2 stops10h 44m
United Airlines
Wed 6/36:00 am
MCI
- SEA
1 stop7h 38m
United Airlines
Deal found 5/3![United Airlines logo]()
$452
This Delta deal was found by Cheapflights users on 5/1. 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.
Thu 6/1812:33 am
PDX
- MCI
1 stop6h 00m
Delta
Mon 6/222:55 pm
MCI
- PDX
1 stop5h 27m
Delta
Deal found 5/1![Delta logo]()
$383
Last-minute flights from Washington to MissouriDiscover last-minute flight deals from Washington to Missouri. Data last updated May 6, 2026 and is based on user searches.
Discover last-minute flight deals from Washington to Missouri. Data last updated May 6, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 5/2. 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.
Sun 5/1012:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Wed 5/206:51 pm
STL
- PDX
1 stop17h 29m
Frontier
Deal found 5/2![Frontier logo]()
$246
This CheapOair deal was found by Cheapflights users on 5/5. 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 5/2112:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Wed 5/278:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Deal found 5/5![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 5/3. 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 5/267:50 pm
SEA
- MCI
1 stop15h 59m
Frontier
Sat 6/201:45 pm
MCI
- SEA
1 stop22h 03m
Frontier
Deal found 5/3![Frontier logo]()
$216
This Delta deal was found by Cheapflights users on 5/5. 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 5/265:30 pm
SEA
- MCI
Nonstop3h 40m
Delta
Tue 6/27:05 am
MCI
- SEA
Nonstop4h 00m
Delta
Deal found 5/5![Delta logo]()
$237
This CheapOair deal was found by Cheapflights users on 5/1. 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 5/265:46 pm
PDX
- STL
1 stop23h 37m
Frontier
Thu 5/289:21 pm
STL
- PDX
1 stop14h 59m
Frontier
Deal found 5/1![Frontier logo]()
$240
This CheapOair deal was found by Cheapflights users on 5/6. 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 5/2812:35 pm
PDX
- STL
1 stop28h 48m
Frontier
Sun 5/318:08 pm
STL
- PDX
1 stop22h 38m
Frontier
Deal found 5/6![Frontier logo]()
$254
This Delta deal was found by Cheapflights users on 5/5. 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 5/295:30 pm
SEA
- MCI
Nonstop3h 40m
Delta
Sat 5/304:09 pm
MCI
- SEA
1 stop9h 46m
Delta
Deal found 5/5![Delta logo]()
$247
This CheapOair deal was found by Cheapflights users on 5/3. 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.
Mon 6/17:50 pm
SEA
- MCI
1 stop15h 59m
Frontier
Mon 6/82:34 pm
MCI
- SEA
1 stop21h 14m
Frontier
Deal found 5/3![Frontier logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 6/37:50 pm
SEA
- MCI
1 stop15h 59m
Frontier
Mon 6/82:34 pm
MCI
- SEA
1 stop25h 44m
Frontier
Deal found 5/5![Frontier logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 6/47:50 pm
SEA
- MCI
1 stop15h 59m
Frontier
Mon 6/82:34 pm
MCI
- SEA
1 stop21h 14m
Frontier
Deal found 5/3![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 6/1112:26 pm
PDX
- MCI
1 stop22h 34m
Frontier
Tue 6/301:45 pm
MCI
- PDX
1 stop28h 50m
Frontier
Deal found 5/2![Frontier logo]()
$215
This CheapOair deal was found by Cheapflights users on 5/4. 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 6/1112:26 pm
PDX
- STL
1 stop28h 27m
Frontier
Wed 6/177:46 pm
STL
- PDX
1 stop26h 01m
Frontier
Deal found 5/4![Frontier logo]()
$241
One-way flights from Washington to MissouriSearch for one-way flight options from Washington to Missouri. Find affordable one-way fares based on user searches. Data last updated May 6, 2026.
Search for one-way flight options from Washington to Missouri. Find affordable one-way fares based on user searches. Data last updated May 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 6/93:33 pm
SEA
- STL
1 stop25h 50m
Frontier
Deal found 5/1![Frontier logo]()
$79
This Priceline deal was found by Cheapflights users on 5/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/2411:15 am
PDX
- STL
1 stop6h 56m
Frontier
Deal found 5/2![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 6/307:41 pm
SEA
- MCI
1 stop11h 06m
Frontier
Deal found 5/6![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 6/17:50 pm
SEA
- STL
1 stop21h 33m
Frontier
Deal found 5/6![Frontier logo]()
$88
This CheapOair deal was found by Cheapflights users on 5/3. 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 5/267:50 pm
SEA
- MCI
1 stop15h 59m
Frontier
Deal found 5/3![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 6/25:46 pm
PDX
- STL
1 stop23h 37m
Frontier
Deal found 5/6![Frontier logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 9/15:42 pm
PDX
- STL
1 stop23h 41m
Frontier
Deal found 5/5![Frontier logo]()
$103
This Frontier deal was found by Cheapflights users on 5/4. 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.
Fri 5/2911:15 am
PDX
- STL
1 stop6h 56m
Frontier
Deal found 5/4![Frontier logo]()
$105
This Super.com deal was found by Cheapflights users on 5/3. 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 7/157:41 pm
SEA
- STL
1 stop21h 42m
Frontier
Deal found 5/3![Frontier logo]()
$109
This Super.com deal was found by Cheapflights users on 5/2. 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 6/107:41 pm
SEA
- MCI
1 stop15h 19m
Frontier
Deal found 5/2![Frontier logo]()
$110
This Super.com deal was found by Cheapflights users on 5/3. 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.
Mon 5/1811:37 am
SEA
- STL
1 stop28h 29m
Frontier
Deal found 5/3![Frontier logo]()
$110
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 6/245:20 pm
PDX
- MCI
1 stop17h 40m
Frontier
Deal found 5/1![Frontier logo]()
$112
Find flight deals from Washington to Missouri
Keep the following information in mind while searching for Washington to Missouri flight deals. Data was last updated May 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $215 (Kiwi.com) |
One-way from | $79 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $448 |
Good round-trip deal | $387 or less |
Good one-way deal | $218 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington to Missouri 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 6, 2026.
Use the filters below to find and compare flights from Washington to Missouri that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleKansas City
SEA - MCI
SEAMCI
Seattle/Tacoma Intl
Fri 6/12
2:55 pm-11:49 pm
1 stop6h 54m
Kansas City
Tue 6/16
7:26 am-12:34 pm
1 stop7h 08m
$257
SeattleSt. Louis
SEA - STL
SEASTL
Seattle/Tacoma Intl
Tue 6/2
7:05 am-4:37 pm
1 stop7h 32m
Lambert-St Louis
Sat 6/6
7:41 pm-10:11 pm
Nonstop4h 30m
$327
PortlandKansas City
PDX - MCI
PDXMCI
Portland
Thu 9/24
6:20 am-4:55 pm
1 stop8h 35m
Kansas City
Sun 9/27
6:25 am-11:20 am
1 stop6h 55m
$327
PortlandKansas City
PDX - MCI
PDXMCI
Portland
Wed 6/17
5:24 pm-12:18 am
1 stop4h 54m
Kansas City
Wed 6/24
7:00 am-11:42 am
1 stop6h 42m
$327
PortlandKansas City
PDX - MCI
PDXMCI
Portland
Tue 6/23
5:20 pm-8:45 am
2 stops13h 25m
Kansas City
Fri 6/26
9:15 pm-1:20 am
1 stop6h 05m
$338
SeattleSt. Louis
SEA - STL
SEASTL
Seattle/Tacoma Intl
Wed 6/3
6:50 am-5:55 pm
2 stops9h 05m
Lambert-St Louis
Sat 6/6
4:00 pm-11:30 pm
1 stop9h 30m
$342
SeattleKansas City
SEA - MCI
SEAMCI
Seattle/Tacoma Intl
Fri 6/19
5:30 pm-11:06 pm
Nonstop3h 36m
Kansas City
Mon 6/22
6:00 pm-10:05 pm
1 stop6h 05m
$347
SeattleKansas City
SEA - MCI
SEAMCI
Seattle/Tacoma Intl
Thu 6/25
12:35 pm-11:49 pm
1 stop9h 14m
Kansas City
Sun 6/28
7:00 am-9:06 am
Nonstop4h 06m
$347
SeattleSpringfield
SEA - SGF
SEASGF
Seattle/Tacoma Intl
Fri 6/5
12:49 am-10:30 am
1 stop7h 41m
Springfield-Branson
Sat 6/13
7:30 pm-12:59 am
1 stop7h 29m
$349
SpokaneSt. Louis
GEG - STL
GEGSTL
Spokane
Tue 6/2
5:10 am-1:30 pm
1 stop6h 20m
Lambert-St Louis
Sat 6/6
3:50 pm-10:00 pm
2 stops8h 10m
$357
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Washington to Missouri
Have a flexible travel schedule? Discover the best time to fly to Missouri from Washington with our price prediction graph.
PDX-MCI
SEA-MCI
PDX-STL
SEA-STL
SEA-SGF
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 Washington to Missouri
USWA-USMO
PDX-MCI
SEA-MCI
PDX-STL
SEA-STL
How far ahead should I book a flight from State of Washington to Missouri?
The best time to book flights from State of Washington to Missouri is 76 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from State of Washington to Missouri?
Currently, January is the cheapest month in which you can book a flight from State of Washington to Missouri (average of $88). Flying from State of Washington to Missouri in October is currently the most expensive (average of $148). 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 WA to MO?
Find hourly flight availability from Washington to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 6, 2026.
When flying from State of Washington to Missouri, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from State of Washington to Missouri
Explore weekly flight availability from Washington to Missouri. 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 6, 2026.
The most flights from USWA to USMO are scheduled on a Wednesday (6 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).
How much does it cost to fly round-trip from State of Washington to Missouri?
Reviews of airlines servicing Missouri
Get insights into the airlines that provide service to Missouri. 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 Missouri. Reviews last updated May 6, 2026.
Read through reviews of airlines operating flights from Washington to Missouri, such as Alaska Airlines,Southwest, andDelta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Overall
7.9
Food
7.1
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Overall
7.9
Food
7.1
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Overall
7.9
Food
7.1
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Overall
7.9
Food
7.1
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Overall
7.9
Food
7.1
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Overall
7.9
Food
7.1
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Related info for your journey
Find useful and relevant information for your journey from Washington to Missouri. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Washington to Missouri
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Missouri by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Washington to Missouri by cabin class
Find flights from Washington to Missouri, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Washington and Missouri flights
Browse other Washington and Missouri flight options. Last updated on May 6, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Missouri
Find the right flight back to Washington after your stay in Missouri
Washington to Missouri flights
Consider these flights traveling from Washington to Missouri.
Top 7 airlines flying from Washington to Missouri
Discover the top 7 airlines that operate flights from Washington to Missouri. 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 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$94 | Average$379 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$133 | Average$249 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$148 | Average$370 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$157 | Average$452 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$178 | Average$416 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$188 | Average$476 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$199 | Average$449 | FlexibilityNo cancel fee | On-time75% |