Fare Guide

Estimated lowest fares found within 7 days

Cheapest Airline United Airlines

The cheapest airline(s) flying from Washington to Saint Louis is United Airlines.

  • United Airlines United Airlines
  • American Airlines American Airlines
  • Southwest Airlines Southwest Airlines
  • Frontier Airlines Frontier Airlines
  • Alaska Airlines Alaska Airlines
Cheapest Month April

Travel Period: January 2025 - December 2025

The cheapest month(s) to fly from Washington to Saint Louis is April.

  • Jan 2025
  • Feb 2025
  • Mar 2025
  • Apr 2025
  • May 2025
  • Jun 2025
  • Jul 2025
  • Aug 2025
  • Sep 2025
  • Oct 2025
  • Nov 2025
  • Dec 2025
Cheapest Day of the Week Wednesday

The cheapest day(s) of the week to fly from Washington to Saint Louis is Wednesday.

  • Sun Sunday
  • Mon Monday
  • Tue Tuesday
  • Wed Wednesday
  • Thu Thursday
  • Fri Friday
  • Sat Saturday

Flight Schedules

Last Updated: Mon, 2 Dec, 2024

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    All
    • Airline Filter by Airline
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      • Availability
        • M
        • T
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        • F
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        • S
      • 19:20 BWI
        20:45 STL
        2Hrs, 25m Direct
      • BWIBaltimore Washington International Airport 19:20 - STL 20:45 2h 25m Direct
      • BWIBaltimore Washington International Airport 19:20
      • STLSt Louis Lambert Intl Airport 20:45
      • 2h 25m
      • Direct
      • Southwest Airlines (WN 1182)Boeing 737 Max 8 Passenger
      • Southwest Airlines (WN 1182)
        • M
        • T
        • W
        • -
        • -
        • -
        • -
      • Boeing 737 Max 8 Passenger
      • 20:04 DCA
        21:53 STL
        2Hrs, 49m Direct
      • DCAWashington Ronald Reagan National Airport 20:04 - STL 21:53 2h 49m Direct
      • DCAWashington Ronald Reagan National Airport 20:04
      • STLSt Louis Lambert Intl Airport 21:53
      • 2h 49m
      • Direct
      • American Airlines (AA 4357)Embraer Emb 175
      • American Airlines (AA 4357)
        • M
        • T
        • W
        • -
        • -
        • -
        • -
      • Embraer Emb 175
      • 20:06 DCA
        21:48 STL
        2Hrs, 42m Direct
      • DCAWashington Ronald Reagan National Airport 20:06 - STL 21:48 2h 42m Direct
      • DCAWashington Ronald Reagan National Airport 20:06
      • STLSt Louis Lambert Intl Airport 21:48
      • 2h 42m
      • Direct
      • American Airlines (AA 5224)Crj 700 Canadair Regional
      • American Airlines (AA 5224)
        • -
        • -
        • -
        • -
        • F
        • S
        • -
      • Crj 700 Canadair Regional
      • 20:10 DCA
        21:45 STL
        2Hrs, 35m Direct
      • DCAWashington Ronald Reagan National Airport 20:10 - STL 21:45 2h 35m Direct
      • DCAWashington Ronald Reagan National Airport 20:10
      • STLSt Louis Lambert Intl Airport 21:45
      • 2h 35m
      • Direct
      • American Airlines (AA 4358)Embraer Emb 175
      • American Airlines (AA 4358)
        • -
        • -
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        • T
        • -
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        • S
      • Embraer Emb 175
      • 21:45 BWI
        23:10 STL
        2Hrs, 25m Direct
      • BWIBaltimore Washington International Airport 21:45 - STL 23:10 2h 25m Direct
      • BWIBaltimore Washington International Airport 21:45
      • STLSt Louis Lambert Intl Airport 23:10
      • 2h 25m
      • Direct
      • Southwest Airlines (WN 3474)Boeing 737 700
      • Southwest Airlines (WN 3474)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • Boeing 737 700
      • 21:50 BWI
        23:15 STL
        2Hrs, 25m Direct
      • BWIBaltimore Washington International Airport 21:50 - STL 23:15 2h 25m Direct
      • BWIBaltimore Washington International Airport 21:50
      • STLSt Louis Lambert Intl Airport 23:15
      • 2h 25m
      • Direct
      • Southwest Airlines (WN 3474)Boeing 737 700
      • Southwest Airlines (WN 3474)
        • -
        • -
        • -
        • -
        • -
        • S
        • -
      • Boeing 737 700
      • 22:30 BWI
        23:50 STL
        2Hrs, 20m Direct
      • BWIBaltimore Washington International Airport 22:30 - STL 23:50 2h 20m Direct
      • BWIBaltimore Washington International Airport 22:30
      • STLSt Louis Lambert Intl Airport 23:50
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 332)Boeing 737 800
      • Southwest Airlines (WN 332)
        • -
        • -
        • -
        • -
        • F
        • -
        • S
      • Boeing 737 800
      • 06:15 BWI
        07:45 STL
        2Hrs, 30m Direct
      • BWIBaltimore Washington International Airport 06:15 - STL 07:45 2h 30m Direct
      • BWIBaltimore Washington International Airport 06:15
      • STLSt Louis Lambert Intl Airport 07:45
      • 2h 30m
      • Direct
      • Southwest Airlines (WN 1583)Boeing 737 700
      • Southwest Airlines (WN 1583)
        • -
        • -
        • -
        • -
        • -
        • S
        • -
      • Boeing 737 700
      • 06:25 BWI
        07:55 STL
        2Hrs, 30m Direct
      • BWIBaltimore Washington International Airport 06:25 - STL 07:55 2h 30m Direct
      • BWIBaltimore Washington International Airport 06:25
      • STLSt Louis Lambert Intl Airport 07:55
      • 2h 30m
      • Direct
      • Southwest Airlines (WN 1583)Boeing 737 700
      • Southwest Airlines (WN 1583)
        • -
        • -
        • -
        • -
        • F
        • -
        • S
      • Boeing 737 700
      • 07:00 BWI
        08:30 STL
        2Hrs, 30m Direct
      • BWIBaltimore Washington International Airport 07:00 - STL 08:30 2h 30m Direct
      • BWIBaltimore Washington International Airport 07:00
      • STLSt Louis Lambert Intl Airport 08:30
      • 2h 30m
      • Direct
      • Southwest Airlines (WN 1583)Boeing 737 700
      • Southwest Airlines (WN 1583)
        • -
        • -
        • -
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        • -
        • -
        • -
      • Boeing 737 700
      • 07:30 BWI
        08:55 STL
        2Hrs, 25m Direct
      • BWIBaltimore Washington International Airport 07:30 - STL 08:55 2h 25m Direct
      • BWIBaltimore Washington International Airport 07:30
      • STLSt Louis Lambert Intl Airport 08:55
      • 2h 25m
      • Direct
      • Southwest Airlines (WN 1583)Boeing 737 700
      • Southwest Airlines (WN 1583)
        • M
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        • -
        • -
        • -
        • -
      • Boeing 737 700
      • 07:44 DCA
        09:21 STL
        2Hrs, 37m Direct
      • DCAWashington Ronald Reagan National Airport 07:44 - STL 09:21 2h 37m Direct
      • DCAWashington Ronald Reagan National Airport 07:44
      • STLSt Louis Lambert Intl Airport 09:21
      • 2h 37m
      • Direct
      • American Airlines (AA 4458)Embraer Emb 175
      • American Airlines (AA 4458)
        • M
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        • -
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        • -
      • Embraer Emb 175
      • 08:00 DCA
        09:20 STL
        2Hrs, 20m Direct
      • DCAWashington Ronald Reagan National Airport 08:00 - STL 09:20 2h 20m Direct
      • DCAWashington Ronald Reagan National Airport 08:00
      • STLSt Louis Lambert Intl Airport 09:20
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 1401)Boeing 737 700
      • Southwest Airlines (WN 1401)
        • -
        • -
        • -
        • -
        • F
        • S
        • S
      • Boeing 737 700
      • 08:15 DCA
        09:56 STL
        2Hrs, 41m Direct
      • DCAWashington Ronald Reagan National Airport 08:15 - STL 09:56 2h 41m Direct
      • DCAWashington Ronald Reagan National Airport 08:15
      • STLSt Louis Lambert Intl Airport 09:56
      • 2h 41m
      • Direct
      • American Airlines (AA 4458)Embraer Emb 175
      • American Airlines (AA 4458)
        • -
        • -
        • -
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        • F
        • -
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      • Embraer Emb 175
      • 08:15 DCA
        09:50 STL
        2Hrs, 35m Direct
      • DCAWashington Ronald Reagan National Airport 08:15 - STL 09:50 2h 35m Direct
      • DCAWashington Ronald Reagan National Airport 08:15
      • STLSt Louis Lambert Intl Airport 09:50
      • 2h 35m
      • Direct
      • Southwest Airlines (WN 1401)Boeing 737 700
      • Southwest Airlines (WN 1401)
        • -
        • -
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        • -
        • -
        • -
      • Boeing 737 700
      • 08:30 IAD
        09:54 STL
        2Hrs, 24m Direct
      • IADWashington Dulles International Airport 08:30 - STL 09:54 2h 24m Direct
      • IADWashington Dulles International Airport 08:30
      • STLSt Louis Lambert Intl Airport 09:54
      • 2h 24m
      • Direct
      • United Airlines (UA 4427)Canadair Regional Jet 550
      • United Airlines (UA 4427)
        • -
        • -
        • -
        • -
        • F
        • S
        • S
      • Canadair Regional Jet 550
      • 08:45 DCA
        10:15 STL
        2Hrs, 30m Direct
      • DCAWashington Ronald Reagan National Airport 08:45 - STL 10:15 2h 30m Direct
      • DCAWashington Ronald Reagan National Airport 08:45
      • STLSt Louis Lambert Intl Airport 10:15
      • 2h 30m
      • Direct
      • Southwest Airlines (WN 1401)Boeing 737 700
      • Southwest Airlines (WN 1401)
        • M
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        • -
        • -
        • -
        • -
      • Boeing 737 700
      • 08:50 IAD
        10:16 STL
        2Hrs, 26m Direct
      • IADWashington Dulles International Airport 08:50 - STL 10:16 2h 26m Direct
      • IADWashington Dulles International Airport 08:50
      • STLSt Louis Lambert Intl Airport 10:16
      • 2h 26m
      • Direct
      • United Airlines (UA 4427)Canadair Regional Jet 550
      • United Airlines (UA 4427)
        • M
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        • -
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        • -
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      • Canadair Regional Jet 550
      • 09:40 BWI
        11:05 STL
        2Hrs, 25m Direct
      • BWIBaltimore Washington International Airport 09:40 - STL 11:05 2h 25m Direct
      • BWIBaltimore Washington International Airport 09:40
      • STLSt Louis Lambert Intl Airport 11:05
      • 2h 25m
      • Direct
      • Southwest Airlines (WN 2072)Boeing 737 700
      • Southwest Airlines (WN 2072)
        • -
        • -
        • -
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        • -
        • -
        • -
      • Boeing 737 700
      • 09:40 BWI
        12:40 STL
        4Hrs, 00m Direct
      • BWIBaltimore Washington International Airport 09:40 - STL 12:40 4h Direct
      • BWIBaltimore Washington International Airport 09:40
      • STLSt Louis Lambert Intl Airport 12:40
      • 4h
      • Direct
      • Southwest Airlines (WN 1132)Boeing 737 700
      • Southwest Airlines (WN 1132)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • Boeing 737 700
      • 12:00 DCA
        13:20 STL
        2Hrs, 20m Direct
      • DCAWashington Ronald Reagan National Airport 12:00 - STL 13:20 2h 20m Direct
      • DCAWashington Ronald Reagan National Airport 12:00
      • STLSt Louis Lambert Intl Airport 13:20
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 2374)Boeing 737 Max 8 Passenger
      • Southwest Airlines (WN 2374)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • Boeing 737 Max 8 Passenger
      • 12:00 DCA
        13:20 STL
        2Hrs, 20m Direct
      • DCAWashington Ronald Reagan National Airport 12:00 - STL 13:20 2h 20m Direct
      • DCAWashington Ronald Reagan National Airport 12:00
      • STLSt Louis Lambert Intl Airport 13:20
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 2374)Boeing 737 700
      • Southwest Airlines (WN 2374)
        • -
        • -
        • -
        • -
        • F
        • -
        • S
      • Boeing 737 700
      • 12:15 DCA
        13:35 STL
        2Hrs, 20m Direct
      • DCAWashington Ronald Reagan National Airport 12:15 - STL 13:35 2h 20m Direct
      • DCAWashington Ronald Reagan National Airport 12:15
      • STLSt Louis Lambert Intl Airport 13:35
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 2374)Boeing 737 800
      • Southwest Airlines (WN 2374)
        • -
        • -
        • -
        • -
        • -
        • S
        • -
      • Boeing 737 800
      • 12:30 BWI
        13:50 STL
        2Hrs, 20m Direct
      • BWIBaltimore Washington International Airport 12:30 - STL 13:50 2h 20m Direct
      • BWIBaltimore Washington International Airport 12:30
      • STLSt Louis Lambert Intl Airport 13:50
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 1132)Boeing 737 700
      • Southwest Airlines (WN 1132)
        • -
        • -
        • -
        • -
        • F
        • -
        • S
      • Boeing 737 700
      • 12:30 DCA
        13:50 STL
        2Hrs, 20m Direct
      • DCAWashington Ronald Reagan National Airport 12:30 - STL 13:50 2h 20m Direct
      • DCAWashington Ronald Reagan National Airport 12:30
      • STLSt Louis Lambert Intl Airport 13:50
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 1539)Boeing 737 Max 8 Passenger
      • Southwest Airlines (WN 1539)
        • M
        • T
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        • -
        • -
        • -
        • -
      • Boeing 737 Max 8 Passenger
      • 12:55 BWI
        14:15 STL
        2Hrs, 20m Direct
      • BWIBaltimore Washington International Airport 12:55 - STL 14:15 2h 20m Direct
      • BWIBaltimore Washington International Airport 12:55
      • STLSt Louis Lambert Intl Airport 14:15
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 3539)Boeing 737 700
      • Southwest Airlines (WN 3539)
        • -
        • -
        • -
        • -
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        • S
        • -
      • Boeing 737 700
      • 13:05 BWI
        15:40 STL
        3Hrs, 35m Direct
      • BWIBaltimore Washington International Airport 13:05 - STL 15:40 3h 35m Direct
      • BWIBaltimore Washington International Airport 13:05
      • STLSt Louis Lambert Intl Airport 15:40
      • 3h 35m
      • Direct
      • Southwest Airlines (WN 4753)Boeing 737 700
      • Southwest Airlines (WN 4753)
        • M
        • T
        • W
        • -
        • -
        • -
        • -
      • Boeing 737 700
      • 14:00 BWI
        15:20 STL
        2Hrs, 20m Direct
      • BWIBaltimore Washington International Airport 14:00 - STL 15:20 2h 20m Direct
      • BWIBaltimore Washington International Airport 14:00
      • STLSt Louis Lambert Intl Airport 15:20
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 3164)Boeing 737 700
      • Southwest Airlines (WN 3164)
        • M
        • T
        • W
        • -
        • -
        • -
        • -
      • Boeing 737 700
      • 15:00 DCA
        16:20 STL
        2Hrs, 20m Direct
      • DCAWashington Ronald Reagan National Airport 15:00 - STL 16:20 2h 20m Direct
      • DCAWashington Ronald Reagan National Airport 15:00
      • STLSt Louis Lambert Intl Airport 16:20
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 3085)Boeing 737 700
      • Southwest Airlines (WN 3085)
        • -
        • -
        • -
        • T
        • F
        • S
        • S
      • Boeing 737 700
      • 15:20 DCA
        16:45 STL
        2Hrs, 25m Direct
      • DCAWashington Ronald Reagan National Airport 15:20 - STL 16:45 2h 25m Direct
      • DCAWashington Ronald Reagan National Airport 15:20
      • STLSt Louis Lambert Intl Airport 16:45
      • 2h 25m
      • Direct
      • Southwest Airlines (WN 3085)Boeing 737 700
      • Southwest Airlines (WN 3085)
        • M
        • T
        • W
        • -
        • -
        • -
        • -
      • Boeing 737 700
      • 15:30 BWI
        19:05 STL
        4Hrs, 35m Direct
      • BWIBaltimore Washington International Airport 15:30 - STL 19:05 4h 35m Direct
      • BWIBaltimore Washington International Airport 15:30
      • STLSt Louis Lambert Intl Airport 19:05
      • 4h 35m
      • Direct
      • Southwest Airlines (WN 3228)Boeing 737 Max 8 Passenger
      • Southwest Airlines (WN 3228)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • Boeing 737 Max 8 Passenger
      • 16:00 DCA
        19:55 STL
        4Hrs, 55m Direct
      • DCAWashington Ronald Reagan National Airport 16:00 - STL 19:55 4h 55m Direct
      • DCAWashington Ronald Reagan National Airport 16:00
      • STLSt Louis Lambert Intl Airport 19:55
      • 4h 55m
      • Direct
      • Southwest Airlines (WN 2300)Boeing 737 800
      • Southwest Airlines (WN 2300)
        • -
        • -
        • -
        • -
        • F
        • -
        • S
      • Boeing 737 800
      • 17:10 BWI
        18:30 STL
        2Hrs, 20m Direct
      • BWIBaltimore Washington International Airport 17:10 - STL 18:30 2h 20m Direct
      • BWIBaltimore Washington International Airport 17:10
      • STLSt Louis Lambert Intl Airport 18:30
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 3164)Boeing 737 700
      • Southwest Airlines (WN 3164)
        • -
        • -
        • -
        • -
        • -
        • S
        • -
      • Boeing 737 700
      • 17:15 BWI
        20:05 STL
        3Hrs, 50m Direct
      • BWIBaltimore Washington International Airport 17:15 - STL 20:05 3h 50m Direct
      • BWIBaltimore Washington International Airport 17:15
      • STLSt Louis Lambert Intl Airport 20:05
      • 3h 50m
      • Direct
      • Southwest Airlines (WN 4385)Boeing 737 700
      • Southwest Airlines (WN 4385)
        • -
        • -
        • -
        • -
        • -
        • S
        • -
      • Boeing 737 700
      • 17:25 IAD
        18:51 STL
        2Hrs, 26m Direct
      • IADWashington Dulles International Airport 17:25 - STL 18:51 2h 26m Direct
      • IADWashington Dulles International Airport 17:25
      • STLSt Louis Lambert Intl Airport 18:51
      • 2h 26m
      • Direct
      • United Airlines (UA 4527)Canadair Regional Jet 550
      • United Airlines (UA 4527)
        • M
        • T
        • W
        • -
        • -
        • -
        • -
      • Canadair Regional Jet 550
      • 18:05 DCA
        19:30 STL
        2Hrs, 25m Direct
      • DCAWashington Ronald Reagan National Airport 18:05 - STL 19:30 2h 25m Direct
      • DCAWashington Ronald Reagan National Airport 18:05
      • STLSt Louis Lambert Intl Airport 19:30
      • 2h 25m
      • Direct
      • Southwest Airlines (WN 3950)Boeing 737 700
      • Southwest Airlines (WN 3950)
        • M
        • T
        • W
        • -
        • -
        • -
        • -
      • Boeing 737 700
      • 18:35 DCA
        20:00 STL
        2Hrs, 25m Direct
      • DCAWashington Ronald Reagan National Airport 18:35 - STL 20:00 2h 25m Direct
      • DCAWashington Ronald Reagan National Airport 18:35
      • STLSt Louis Lambert Intl Airport 20:00
      • 2h 25m
      • Direct
      • Southwest Airlines (WN 3950)Boeing 737 700
      • Southwest Airlines (WN 3950)
        • -
        • -
        • -
        • T
        • F
        • -
        • S
      • Boeing 737 700
      • 18:50 IAD
        20:23 STL
        2Hrs, 33m Direct
      • IADWashington Dulles International Airport 18:50 - STL 20:23 2h 33m Direct
      • IADWashington Dulles International Airport 18:50
      • STLSt Louis Lambert Intl Airport 20:23
      • 2h 33m
      • Direct
      • United Airlines (UA 4527)Canadair Regional Jet 550
      • United Airlines (UA 4527)
        • -
        • -
        • -
        • T
        • F
        • S
        • S
      • Canadair Regional Jet 550
      • 18:50 BWI
        20:10 STL
        2Hrs, 20m Direct
      • BWIBaltimore Washington International Airport 18:50 - STL 20:10 2h 20m Direct
      • BWIBaltimore Washington International Airport 18:50
      • STLSt Louis Lambert Intl Airport 20:10
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 3164)Boeing 737 800
      • Southwest Airlines (WN 3164)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • Boeing 737 800
      • 18:55 DCA
        20:15 STL
        2Hrs, 20m Direct
      • DCAWashington Ronald Reagan National Airport 18:55 - STL 20:15 2h 20m Direct
      • DCAWashington Ronald Reagan National Airport 18:55
      • STLSt Louis Lambert Intl Airport 20:15
      • 2h 20m
      • Direct
      • Southwest Airlines (WN 3950)Boeing 737 700
      • Southwest Airlines (WN 3950)
        • -
        • -
        • -
        • -
        • -
        • S
        • -
      • Boeing 737 700
      No Schedules Sorry, there are no schedules matching your filters. Try removing one. reset
      What’s the fastest flight time from Washington to Saint Louis?

      The fastest flight time for direct flights from Washington to Saint Louis is 2 hours 20 minutes. Check latest flight schedules & prices on Wego.

      What’s the most popular airline flying from Washington to Saint Louis?

      The most popular airline flying from Washington to Saint Louis is American Airlines. Find the latest flight deals on Wego.

      How far is Saint Louis from Washington?

      The flight distance between Washington and Saint Louis is 1141km. Check all available flights on Wego.

      When is the earliest and latest flight of the day?

      The earliest flight of the day departs at 06:15. The last flight of the day departs at 19:20. See the full list of flight times on Wego.

      How many airlines offer direct flights from Washington to Saint Louis?

      There are 3 airlines that offer direct flights from Washington to Saint Louis. Find out the list of airlines on Wego.

      All Airports in Saint Louis

      St Louis Lambert Intl Airport STL

      Popular Airlines Flying From Washington to Saint Louis

      American Airlines ‏()
      United Airlines ‏()
      Southwest Airlines ‏()

      Popular Destinations From Saint Louis

      Popular Destinations From Washington

      Popular Hotels in Saint Louis

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