Southwest® flights from Washington D.C. Reagan National to St. Louis from $135

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Low fares from Washington D.C. Reagan National to St. Louis

$

Washington D.C. Reagan National (DCA)to

St. Louis (STL)
Depart: 02/06/2027

One-way

Basic

From
$135
Seen: 13 hrs ago

Washington D.C. Reagan National (DCA)to

St. Louis (STL)
Depart: 12/30/2026

One-way

Basic

From
$135
Seen: 2 hrs ago

Washington D.C. Reagan National (DCA)to

St. Louis (STL)
Depart: 12/29/2026

One-way

Basic

From
$135
Seen: 42 minutes ago

Washington D.C. Reagan National (DCA)to

St. Louis (STL)
Depart: 01/09/2027

One-way

Basic

From
$135
Seen: 8 hrs ago

Washington D.C. Reagan National (DCA)to

St. Louis (STL)
Depart: 12/05/2026

One-way

Basic

From
$135
Seen: 9 hrs ago

Washington D.C. Reagan National (DCA)to

St. Louis (STL)
Depart: 12/08/2026

One-way

Basic

From
$135
Seen: 10 hrs ago

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Explore flights from Washington D.C. Reagan National to St. Louis

Nov 2026
From$268*
Seen: 16 hrs ago
One Way/Basic
Dec 2026
From$135*
Seen: 9 hrs ago
One Way/Basic
Jan 2027
From$135*
Seen: 5 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $135
cmp-daily-histogram-bars-legend-max-price-aria-label $325
Displaying fares for November-2026
  • DCA–STL, 11/13/2026: From $297
    13

    Fri

    NOV

  • DCA–STL, 11/14/2026: From $268
    14

    Sat

  • DCA–STL: cmp-view-offers-disclaimer. Find Offers
    15

    Sun

  • DCA–STL, 11/16/2026: From $297
    16

    Mon

  • DCA–STL, 11/17/2026: From $273
    17

    Tue

  • DCA–STL, 11/18/2026: From $268
    18

    Wed

  • DCA–STL, 11/19/2026: From $297
    19

    Thu

  • DCA–STL, 11/20/2026: From $297
    20

    Fri

  • DCA–STL, 11/21/2026: From $268
    21

    Sat

  • DCA–STL, 11/22/2026: From $297
    22

    Sun

  • DCA–STL: cmp-view-offers-disclaimer. Find Offers
    23

    Mon

  • DCA–STL, 11/24/2026: From $268
    24

    Tue

  • DCA–STL, 11/25/2026: From $268
    25

    Wed

  • DCA–STL, 11/26/2026: From $285
    26

    Thu

  • DCA–STL, 11/27/2026: From $285
    27

    Fri

  • DCA–STL, 11/28/2026: From $268
    28

    Sat

  • DCA–STL, 11/29/2026: From $325
    29

    Sun

  • DCA–STL, 11/30/2026: From $285
    30

    Mon

  • DCA–STL, 12/01/2026: From $273
    01

    Tue

    DEC

  • DCA–STL, 12/02/2026: From $135
    02

    Wed

  • DCA–STL, 12/03/2026: From $155
    03

    Thu

  • DCA–STL, 12/04/2026: From $170
    04

    Fri

  • DCA–STL, 12/05/2026: From $135
    05

    Sat

  • DCA–STL, 12/06/2026: From $242
    06

    Sun

  • DCA–STL, 12/07/2026: From $155
    07

    Mon

  • DCA–STL, 12/08/2026: From $135
    08

    Tue

  • DCA–STL, 12/09/2026: From $135
    09

    Wed

  • DCA–STL, 12/10/2026: From $155
    10

    Thu

  • DCA–STL: cmp-view-offers-disclaimer. Find Offers
    11

    Fri

  • DCA–STL: cmp-view-offers-disclaimer. Find Offers
    12

    Sat

    • Range$135-$325

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Ronald Reagan National Airport
    Arriving at:
    Lambert-St Louis Int'l Airport
    Average flight time:
    2 hours 16 minutes
    Distance:
    719 miles

    Questions we hear the most

    The average flight time from Washington, D.C. (Reagan National) to St. Louis is 2 hours 16 minutes.
    There are 156 weekly flights from Washington, D.C. (Reagan National) to St. Louis on Southwest Airlines.
    Yes, Southwest flies nonstop from Washington, D.C. (Reagan National) to St. Louis 4 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Washington, D.C. (Reagan National) to St. Louis 3 times per day on Saturdays and 4 times per day on Sundays.
    To find the lowest fares by day and time to fly Washington, D.C. (Reagan National) to St. Louis with Southwest, check out our Low Fare Calendar.
    You can rent a car at Lambert-St Louis Int'l Airport book yours with your flight.
    Yes! Flights from Washington, D.C. (Reagan National) to St. Louis—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

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