Southwest® flights from Washington D.C. Reagan National to St. Louis from $120

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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: 11/12/2026

One-way

Basic

From
$120
Seen: 18 hrs ago

Washington D.C. Reagan National (DCA)to

St. Louis (STL)
Depart: 11/11/2026

One-way

Basic

From
$120
Seen: 17 hrs ago

Washington D.C. Reagan National (DCA)to

St. Louis (STL)
Depart: 01/08/2027

One-way

Basic

From
$120
Seen: 22 hrs ago

Washington D.C. Reagan National (DCA)to

St. Louis (STL)
Depart: 11/09/2026

One-way

Basic

From
$120
Seen: 12 hrs ago

Washington D.C. Reagan National (DCA)to

St. Louis (STL)
Depart: 12/01/2026

One-way

Basic

From
$120
Seen: 10 hrs ago

Washington D.C. Reagan National (DCA)to

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

One-way

Basic

From
$120
Seen: 9 hrs ago

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

Oct 2026
From$263*
Seen: 8 hrs ago
One Way/Basic
Nov 2026
From$120*
Seen: 18 hrs ago
One Way/Basic
Dec 2026
From$120*
Seen: 11 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $120
cmp-daily-histogram-bars-legend-max-price-aria-label $292
Displaying fares for October-2026
  • DCA–STL, 10/23/2026: From $292
    23

    Fri

    OCT

  • DCA–STL, 10/24/2026: From $263
    24

    Sat

  • DCA–STL, 10/25/2026: From $292
    25

    Sun

  • DCA–STL, 10/26/2026: From $292
    26

    Mon

  • DCA–STL, 10/27/2026: From $263
    27

    Tue

  • DCA–STL: cmp-view-offers-disclaimer. Find Offers
    28

    Wed

  • DCA–STL, 10/29/2026: From $292
    29

    Thu

  • DCA–STL: cmp-view-offers-disclaimer. Find Offers
    30

    Fri

  • DCA–STL, 10/31/2026: From $263
    31

    Sat

  • DCA–STL, 11/01/2026: From $292
    01

    Sun

    NOV

  • DCA–STL, 11/02/2026: From $292
    02

    Mon

  • DCA–STL, 11/03/2026: From $263
    03

    Tue

  • DCA–STL, 11/04/2026: From $263
    04

    Wed

  • DCA–STL, 11/05/2026: From $280
    05

    Thu

  • DCA–STL, 11/06/2026: From $280
    06

    Fri

  • DCA–STL: cmp-view-offers-disclaimer. Find Offers
    07

    Sat

  • DCA–STL, 11/08/2026: From $280
    08

    Sun

  • DCA–STL, 11/09/2026: From $120
    09

    Mon

  • DCA–STL, 11/10/2026: From $120
    10

    Tue

  • DCA–STL, 11/11/2026: From $120
    11

    Wed

  • DCA–STL, 11/12/2026: From $120
    12

    Thu

  • DCA–STL, 11/13/2026: From $120
    13

    Fri

  • DCA–STL, 11/14/2026: From $120
    14

    Sat

  • DCA–STL, 11/15/2026: From $122
    15

    Sun

  • DCA–STL, 11/16/2026: From $120
    16

    Mon

  • DCA–STL: cmp-view-offers-disclaimer. Find Offers
    17

    Tue

  • DCA–STL: cmp-view-offers-disclaimer. Find Offers
    18

    Wed

  • DCA–STL, 11/19/2026: From $120
    19

    Thu

  • DCA–STL, 11/20/2026: From $193
    20

    Fri

  • DCA–STL: cmp-view-offers-disclaimer. Find Offers
    21

    Sat

  • DCA–STL, 11/22/2026: From $122
    22

    Sun

    • Range$120-$292

    *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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