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

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

$

St. Louis (STL)to

Washington D.C. Reagan National (DCA)
Depart: 12/19/2026

One-way

Basic

From
$120
Seen: 18 hrs ago

St. Louis (STL)to

Washington D.C. Reagan National (DCA)
Depart: 12/24/2026

One-way

Basic

From
$120
Seen: 9 hrs ago

St. Louis (STL)to

Washington D.C. Reagan National (DCA)
Depart: 01/14/2027

One-way

Basic

From
$120
Seen: 7 hrs ago

St. Louis (STL)to

Washington D.C. Reagan National (DCA)
Depart: 11/12/2026

One-way

Basic

From
$120
Seen: 21 hrs ago

St. Louis (STL)to

Washington D.C. Reagan National (DCA)
Depart: 01/04/2027

One-way

Basic

From
$120
Seen: 11 hrs ago

St. Louis (STL)to

Washington D.C. Reagan National (DCA)
Depart: 12/15/2026

One-way

Basic

From
$120
Seen: 20 hrs ago

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

Oct 2026
From$253*
Seen: 22 minutes ago
One Way/Basic
Nov 2026
From$120*
Seen: 7 hrs ago
One Way/Basic
Dec 2026
From$120*
Seen: 12 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $120
cmp-daily-histogram-bars-legend-max-price-aria-label $334
Displaying fares for October-2026
  • STL–DCA, 10/24/2026: From $263
    24

    Sat

    OCT

  • STL–DCA, 10/25/2026: From $334
    25

    Sun

  • STL–DCA: cmp-view-offers-disclaimer. Find Offers
    26

    Mon

  • STL–DCA: cmp-view-offers-disclaimer. Find Offers
    27

    Tue

  • STL–DCA, 10/28/2026: From $253
    28

    Wed

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

    Thu

  • STL–DCA, 10/30/2026: From $292
    30

    Fri

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

    Sat

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

    Sun

    NOV

  • STL–DCA: cmp-view-offers-disclaimer. Find Offers
    02

    Mon

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

    Tue

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

    Wed

  • STL–DCA: cmp-view-offers-disclaimer. Find Offers
    05

    Thu

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

    Fri

  • STL–DCA, 11/07/2026: From $263
    07

    Sat

  • STL–DCA: cmp-view-offers-disclaimer. Find Offers
    08

    Sun

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

    Mon

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

    Tue

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

    Wed

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

    Thu

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

    Fri

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

    Sat

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

    Sun

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

    Mon

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

    Tue

  • STL–DCA, 11/18/2026: From $120
    18

    Wed

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

    Thu

  • STL–DCA: cmp-view-offers-disclaimer. Find Offers
    20

    Fri

  • STL–DCA, 11/21/2026: From $120
    21

    Sat

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

    Sun

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

    Mon

    • Range$120-$334

    *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:
    Lambert-St Louis Int'l Airport
    Arriving at:
    Ronald Reagan National Airport
    Average flight time:
    1 hour 59 minutes
    Distance:
    719 miles

    Questions we hear the most

    The average flight time from St. Louis to Washington, D.C. (Reagan National) is 1 hour 59 minutes.
    There are 142 weekly flights from St. Louis to Washington, D.C. (Reagan National) on Southwest Airlines.
    Yes, Southwest flies nonstop from St. Louis to Washington, D.C. (Reagan National) 4 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from St. Louis to Washington, D.C. (Reagan National) 3 times per day on Saturdays and 4 times per day on Sundays.
    To find the lowest fares by day and time to fly St. Louis to Washington, D.C. (Reagan National) with Southwest, check out our Low Fare Calendar.
    You can rent a car at Ronald Reagan National Airport book yours with your flight.
    Yes! Flights from St. Louis to Washington, D.C. (Reagan National)—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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