$109+ Cheap flights from Washington to St. Louis (STL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STL
Dec 4 — Dec 111
Round-trip
1 adult, Economy
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Find cheap flights from Washington to St. Louis 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
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Cheapest flights from Washington to St. LouisExplore the most affordable flight options available from Washington to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2026.
Explore the most affordable flight options available from Washington to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2026.
This Southwest deal was found by Cheapflights users on 11/2. 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.
Sat 12/511:45 am -
1 stop6h 15m
Wed 12/96:20 am -
1 stop8h 30m
Deal found 11/2![Southwest logo]()
$222
This American Airlines deal was found by Cheapflights users on 11/2. 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.
Sat 12/510:49 am -
1 stop6h 17m
Sat 12/121:43 pm -
1 stop8h 48m
Deal found 11/2![American Airlines logo]()
$227
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Wed 12/29:01 am -
1 stop7h 10m
Wed 12/96:30 am -
2 stops9h 19m
Deal found 11/2![United Airlines logo]()
$232
This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 am -
1 stop7h 52m
Sat 12/127:08 am -
1 stop7h 28m
Deal found 11/3![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 10/30. 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 12/811:05 am -
2 stops10h 05m
Fri 12/117:20 pm -
1 stop7h 25m
Deal found 10/30![Southwest logo]()
$242
This American Airlines deal was found by Cheapflights users on 11/2. 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 12/410:52 am -
1 stop7h 06m
Sun 12/66:02 am -
1 stop10h 34m
Deal found 11/2![American Airlines logo]()
$247
This Southwest deal was found by Cheapflights users on 11/2. 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.
Fri 12/41:00 pm -
1 stop7h 10m
Sun 12/65:05 am -
2 stops10h 50m
Deal found 11/2![Southwest logo]()
$252
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Fri 12/42:05 pm -
1 stop6h 54m
Sun 12/65:25 am -
1 stop8h 19m
Deal found 11/3![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 11/2. 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.
Thu 12/177:55 am -
2 stops9h 15m
Thu 12/242:25 pm -
1 stop11h 10m
Deal found 11/2![Southwest logo]()
$258
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Thu 12/105:05 am -
1 stop5h 48m
Mon 12/148:40 am -
2 stops9h 42m
Deal found 11/2![United Airlines logo]()
$269
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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.
Sat 12/125:01 am -
1 stop9h 39m
Wed 12/166:04 am -
2 stops15h 04m
Deal found 11/1![Alaska Airlines logo]()
$331
This American Airlines deal was found by Cheapflights users on 11/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/11:42 pm -
1 stop8h 07m
Tue 12/87:27 am -
1 stop8h 05m
Deal found 11/3![American Airlines logo]()
$369
Best flights from Washington to St. LouisDiscover carefully curated flight deals from Washington to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 4, 2026.
Discover carefully curated flight deals from Washington to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 4, 2026.
This Southwest deal was found by Cheapflights users on 11/2. 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.
Wed 12/25:40 am -
2 stops9h 45m
Wed 12/911:20 am -
2 stops9h 20m
Deal found 11/2![Southwest logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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.
Sat 12/125:01 am -
1 stop9h 39m
Wed 12/166:04 am -
2 stops15h 04m
Deal found 11/1![Alaska Airlines logo]()
$331
This United Airlines deal was found by Cheapflights users on 11/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/49:00 am -
2 stops8h 26m
Mon 12/72:50 pm -
1 stop8h 35m
Deal found 11/1![United Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/45:01 pm -
1 stop5h 45m
Sun 12/67:08 am -
1 stop7h 13m
Deal found 11/3![Delta logo]()
$406
This American Airlines deal was found by Cheapflights users on 11/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/247:00 am -
2 stops10h 36m
Sat 1/91:48 pm -
2 stops12h 00m
Deal found 11/1![American Airlines logo]()
$617
This Southwest deal was found by Cheapflights users on 10/31. 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 12/35:40 am -
2 stops9h 45m
Sun 12/67:20 pm -
1 stop7h 25m
Deal found 10/31![Southwest logo]()
$332
This Southwest deal was found by Cheapflights users on 11/3. 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 12/111:35 am -
2 stops9h 35m
Fri 12/42:35 pm -
1 stop10h 15m
Deal found 11/3![Southwest logo]()
$374
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/146:01 am -
1 stop7h 05m
Wed 12/166:04 am -
1 stop7h 26m
Deal found 11/3![Alaska Airlines logo]()
$424
This Delta deal was found by Cheapflights users on 11/1. 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.
Sat 12/129:33 am -
2 stops11h 53m
Wed 12/1610:14 am -
2 stops12h 56m
Deal found 11/1![Delta logo]()
$443
This Southwest deal was found by Cheapflights users on 11/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/111:35 am -
2 stops9h 35m
Tue 12/811:20 am -
2 stops9h 20m
Deal found 11/1![Southwest logo]()
$383
This United Airlines deal was found by Cheapflights users on 11/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/195:10 am -
1 stop5h 28m
Wed 11/254:39 pm -
1 stop6h 19m
Deal found 11/1![United Airlines logo]()
$469
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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.
Thu 12/242:44 pm -
1 stop7h 15m
Sat 1/94:06 pm -
1 stop7h 04m
Deal found 11/1![Alaska Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:21 pm -
1 stop6h 57m
Sun 11/227:00 pm -
1 stop6h 32m
Deal found 11/3![Delta logo]()
$469
This Southwest deal was found by Cheapflights users on 11/2. 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.
Sat 12/198:15 pm -
1 stop12h 50m
Wed 12/234:50 pm -
1 stop10h 30m
Deal found 11/2![Southwest logo]()
$403
This United Airlines deal was found by Cheapflights users on 10/31. 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 4/81:45 pm -
1 stop5h 14m
Sun 4/116:40 am -
1 stop6h 15m
Deal found 10/31![United Airlines logo]()
$497
This Alaska Airlines deal was found by Cheapflights users on 10/31. 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 12/49:16 am -
Nonstop3h 50m
Sun 12/66:04 am -
Nonstop4h 46m
Deal found 10/31![Alaska Airlines logo]()
$467
This Delta deal was found by Cheapflights users on 11/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:00 am -
1 stop5h 30m
Sat 11/215:00 pm -
1 stop7h 01m
Deal found 11/2![Delta logo]()
$469
This United Airlines deal was found by Cheapflights users on 10/31. 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 11/281:53 pm -
1 stop7h 46m
Sat 12/55:40 pm -
1 stop6h 35m
Deal found 10/31![United Airlines logo]()
$508
This Southwest deal was found by Cheapflights users on 10/30. 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 2/225:25 am -
2 stops15h 25m
Thu 2/259:45 pm -
1 stop13h 50m
Deal found 10/30![Southwest logo]()
$420
This Delta deal was found by Cheapflights users on 10/31. 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 11/165:12 pm -
1 stop5h 28m
Wed 11/187:00 pm -
1 stop6h 32m
Deal found 10/31![Delta logo]()
$469
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Sat 11/1411:38 am -
2 stops10h 21m
Wed 11/1812:58 pm -
2 stops12h 58m
Deal found 10/30![American Airlines logo]()
$639
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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.
Sat 2/65:45 am -
1 stop7h 23m
Tue 2/94:06 pm -
2 stops25h 06m
Deal found 11/1![Alaska Airlines logo]()
$492
This United Airlines deal was found by Cheapflights users on 10/30. 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 12/512:59 pm -
1 stop5h 58m
Wed 12/92:50 pm -
1 stop8h 24m
Deal found 10/30![United Airlines logo]()
$519
This Delta deal was found by Cheapflights users on 11/1. 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.
Tue 12/226:15 am -
1 stop6h 29m
Mon 12/287:46 pm -
1 stop6h 11m
Deal found 11/1![Delta logo]()
$474
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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 12/186:05 pm -
Nonstop3h 54m
Sun 12/206:00 am -
Nonstop4h 42m
Deal found 11/1![Alaska Airlines logo]()
$507
This Delta deal was found by Cheapflights users on 11/1. 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.
Fri 12/185:01 pm -
1 stop5h 45m
Mon 12/287:46 pm -
1 stop6h 11m
Deal found 11/1![Delta logo]()
$474
This Southwest deal was found by Cheapflights users on 11/3. 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.
Mon 11/1611:20 am -
1 stop8h 40m
Wed 11/186:25 am -
1 stop8h 35m
Deal found 11/3![Southwest logo]()
$486
This Priceline deal was found by Cheapflights users on 10/31. 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.
Sat 11/146:01 am -
1 stop7h 20m
Wed 11/186:00 am -
1 stop7h 01m
Deal found 10/31![Alaska Airlines logo]()
$529
This American Airlines deal was found by Cheapflights users on 11/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/195:14 am -
2 stops10h 51m
Mon 11/2312:56 pm -
2 stops12h 54m
Deal found 11/4![American Airlines logo]()
$779
This Southwest deal was found by Cheapflights users on 11/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/138:30 am -
2 stops9h 20m
Tue 11/174:40 pm -
1 stop8h 55m
Deal found 11/1![Southwest logo]()
$491
Last-minute flights from Washington to St. LouisDiscover last-minute flight deals from Washington to St. Louis. Data last updated November 4, 2026 and is based on user searches.
Discover last-minute flight deals from Washington to St. Louis. Data last updated November 4, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 11/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/11:42 pm -
1 stop8h 07m
Tue 12/87:27 am -
1 stop8h 05m
Deal found 11/3![American Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Wed 12/29:01 am -
1 stop7h 10m
Wed 12/96:30 am -
2 stops9h 19m
Deal found 11/2![United Airlines logo]()
$232
This American Airlines deal was found by Cheapflights users on 11/2. 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 12/410:52 am -
1 stop7h 06m
Sun 12/66:02 am -
1 stop10h 34m
Deal found 11/2![American Airlines logo]()
$247
This Southwest deal was found by Cheapflights users on 11/2. 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.
Fri 12/41:00 pm -
1 stop7h 10m
Sun 12/65:05 am -
2 stops10h 50m
Deal found 11/2![Southwest logo]()
$252
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Fri 12/42:05 pm -
1 stop6h 54m
Sun 12/65:25 am -
1 stop8h 19m
Deal found 11/3![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 11/2. 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.
Sat 12/511:45 am -
1 stop6h 15m
Wed 12/96:20 am -
1 stop8h 30m
Deal found 11/2![Southwest logo]()
$222
This American Airlines deal was found by Cheapflights users on 11/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/55:10 am -
1 stop6h 45m
Sat 12/125:00 am -
1 stop8h 19m
Deal found 11/1![American Airlines logo]()
$227
This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 am -
1 stop7h 52m
Sat 12/127:08 am -
1 stop7h 28m
Deal found 11/3![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 10/30. 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 12/811:05 am -
2 stops10h 05m
Fri 12/117:20 pm -
1 stop7h 25m
Deal found 10/30![Southwest logo]()
$242
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Thu 12/105:05 am -
1 stop5h 48m
Mon 12/148:40 am -
2 stops9h 42m
Deal found 11/2![United Airlines logo]()
$269
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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.
Sat 12/125:01 am -
1 stop9h 39m
Wed 12/166:04 am -
2 stops15h 04m
Deal found 11/1![Alaska Airlines logo]()
$331
This Southwest deal was found by Cheapflights users on 11/2. 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.
Thu 12/177:55 am -
2 stops9h 15m
Thu 12/242:25 pm -
1 stop11h 10m
Deal found 11/2![Southwest logo]()
$258
One-way flights from Washington to St. LouisSearch for one-way flight options from Washington to St. Louis. Find affordable one-way fares based on user searches. Data last updated November 4, 2026.
Search for one-way flight options from Washington to St. Louis. Find affordable one-way fares based on user searches. Data last updated November 4, 2026.
This Southwest deal was found by Cheapflights users on 11/2. 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.
Sat 12/511:45 am -
1 stop6h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Southwest logo]()
$109
This Delta deal was found by Cheapflights users on 10/31. 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 12/151:25 pm -
1 stop6h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Delta logo]()
$114
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/44:58 pm -
1 stop15h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Frontier logo]()
$116
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Sat 12/58:30 am -
2 stops8h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![United Airlines logo]()
$119
This Delta deal was found by Cheapflights users on 11/1. 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.
Fri 12/411:15 pm -
1 stop8h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Delta logo]()
$124
This Southwest deal was found by Cheapflights users on 11/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/177:55 am -
2 stops9h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Southwest logo]()
$129
This Super.com deal was found by Cheapflights users on 11/1. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/197:47 pm -
1 stop18h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$134
This Southwest deal was found by Cheapflights users on 10/31. 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 12/145:15 am -
2 stops13h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Southwest logo]()
$135
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 12/71:21 pm -
2 stops43h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 11/2. 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.
Wed 11/184:27 pm -
1 stop16h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$159
This American Airlines deal was found by Cheapflights users on 11/2. 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 12/41:03 pm -
1 stop8h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![American Airlines logo]()
$185
This United Airlines deal was found by Cheapflights users on 11/3. 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 12/89:00 am -
2 stops11h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![United Airlines logo]()
$190
Find flight deals from Washington to St. Louis
Keep the following information in mind while searching for Washington to St. Louis flight deals. Data was last updated November 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $222 (Southwest) |
One-way from | $109 (Southwest) |
Popular in | December |
Cheapest in | January |
Average price | $371 |
Good round-trip deal | $489 or less |
Good one-way deal | $223 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington to St. Louis 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 7,457,451 searches. Data last updated November 4, 2026.
Use the filters below to find and compare flights from Washington to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Wed 1/13
6:00 am-2:38 pm
1 stop6h 38m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$114
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Fri 12/4
11:15 pm-9:19 am
1 stop8h 04m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$124
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Thu 12/17
7:55 am-7:10 pm
2 stops9h 15m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$129
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Thu 12/3
1:00 pm-10:10 pm
1 stop7h 10m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$129
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Wed 12/16
6:15 am-7:26 pm
2 stops11h 11m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$179
SeattleSt. Louis
SEA Seattle/Tacoma Intl - STL Lambert-St Louis
SEASTL
Seattle/Tacoma Intl
Tue 1/26
5:00 am-4:18 pm
2 stops9h 18m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$179
SpokaneSt. Louis
GEG Spokane - STL Lambert-St Louis
GEGSTL
Spokane
Fri 12/4
1:03 pm-11:34 pm
1 stop8h 31m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$185
Quickest round-trip
SpokaneSt. Louis
GEG Spokane - STL Lambert-St Louis
GEGSTL
Spokane
Wed 12/9
1:44 pm-9:28 pm
1 stop5h 44m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$185
SpokaneSt. Louis
GEG Spokane - STL Lambert-St Louis
GEGSTL
Spokane
Sat 12/5
1:44 pm-9:28 pm
1 stop5h 44m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$185
SpokaneSt. Louis
GEG Spokane - STL Lambert-St Louis
GEGSTL
Spokane
Fri 12/18
5:01 pm-12:46 am
1 stop5h 45m
Lambert-St Louis
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$185
Showing 1-10 of 52 resultsSorted by cheapest first
Best time to book a flight from Washington to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Washington with our price prediction graph.
SEA-STL
GEG-STL
PSC-STL
BLI-STL
PUW-STL
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 St. Louis
USWA-STL
SEA-STL
GEG-STL
PSC-STL
BLI-STL
What is the cheapest month to book a flight from State of Washington to St. Louis?
Currently, January is the cheapest month in which you can book a flight from State of Washington to St. Louis (average of $282). Flying from State of Washington to St. Louis in December is currently the most expensive (average of $608). 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 STL?
Find hourly flight availability from Washington to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 4, 2026.
When flying from State of Washington to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How much does it cost to fly round-trip from State of Washington to St. Louis?
Airfare is below average for this route at the moment.
State of Washington to St. Louis flights typically cost between $226 and $611 in December.The cheapest round-trip price found within the last 5 days was $222 on Southwest (Dec 5-Dec 9).
How far ahead should I book a flight from State of Washington to St. Louis?
Booking 76 days in advance of your planned departure date is, on average, the best time to get cheap flights from State of Washington to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Related info for your journey
Find useful and relevant information for your journey from Washington to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsFairview Heights
O'Fallon
Fenton
Swansea
Eureka
Wentzville
Maryland Heights
Chesterfield
Edwardsville
Glencoe
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Washington and St. Louis flights
Browse other Washington and St. Louis flight options. Last updated on November 4, 2026.
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Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on November 4, 2026.
Washington to St. Louis flights
Consider these flights traveling from Washington to St. Louis.
Top 6 airlines flying from Washington to St. Louis
Discover the top 6 airlines that operate flights from Washington to St. Louis. 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 7,457,451 searches. Data last updated November 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$113 | Average$456 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$191 | Average$486 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$417 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$213 | Average$344 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$222 | Average$527 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$246 | Average$437 | FlexibilityNo cancel fee | On-time69% |