Southwest® flights from Denver to Washington, D.C. (Reagan National) from $165

Promo Code

Low fares from Denver to Washington, D.C. (Reagan National)

$

Denver (DEN)to

Washington, D.C. (Reagan National) (DCA)
Depart: 09/14/2026

One-way

Basic

From
$165
Seen: 9 hrs ago

Denver (DEN)to

Washington, D.C. (Reagan National) (DCA)
Depart: 10/06/2026

One-way

Basic

From
$165
Seen: 12 hrs ago

Denver (DEN)to

Washington, D.C. (Reagan National) (DCA)
Depart: 11/03/2026

One-way

Basic

From
$165
Seen: 8 hrs ago

Denver (DEN)to

Washington, D.C. (Reagan National) (DCA)
Depart: 09/26/2026

One-way

Basic

From
$165
Seen: 6 hrs ago

Denver (DEN)to

Washington, D.C. (Reagan National) (DCA)
Depart: 10/28/2026

One-way

Basic

From
$165
Seen: 4 hrs ago

Denver (DEN)to

Washington, D.C. (Reagan National) (DCA)
Depart: 11/17/2026

One-way

Basic

From
$165
Seen: 10 hrs ago

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Explore flights from Denver to Washington, D.C. (Reagan National)

Aug 2026
From$250*
Seen: 1 hour ago
One Way/Basic
Sep 2026
From$165*
Seen: 9 hrs ago
One Way/Basic
Oct 2026
From$165*
Seen: 20 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $165
cmp-daily-histogram-bars-legend-max-price-aria-label $351
Displaying fares for August-2026
  • DEN–DCA, 08/22/2026: From $310
    22

    Sat

    AUG

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

    Sun

  • DEN–DCA, 08/24/2026: From $315
    24

    Mon

  • DEN–DCA, 08/25/2026: From $315
    25

    Tue

  • DEN–DCA, 08/26/2026: From $315
    26

    Wed

  • DEN–DCA, 08/27/2026: From $315
    27

    Thu

  • DEN–DCA, 08/28/2026: From $255
    28

    Fri

  • DEN–DCA, 08/29/2026: From $250
    29

    Sat

  • DEN–DCA, 08/30/2026: From $304
    30

    Sun

  • DEN–DCA, 08/31/2026: From $255
    31

    Mon

  • DEN–DCA: cmp-view-offers-disclaimer. Find Offers
    01

    Tue

    SEP

  • DEN–DCA, 09/02/2026: From $255
    02

    Wed

  • DEN–DCA: cmp-view-offers-disclaimer. Find Offers
    03

    Thu

  • DEN–DCA, 09/04/2026: From $225
    04

    Fri

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

    Sat

  • DEN–DCA: cmp-view-offers-disclaimer. Find Offers
    06

    Sun

  • DEN–DCA, 09/07/2026: From $351
    07

    Mon

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

    Tue

  • DEN–DCA, 09/09/2026: From $200
    09

    Wed

  • DEN–DCA, 09/10/2026: From $200
    10

    Thu

  • DEN–DCA, 09/11/2026: From $170
    11

    Fri

  • DEN–DCA, 09/12/2026: From $165
    12

    Sat

  • DEN–DCA, 09/13/2026: From $310
    13

    Sun

  • DEN–DCA, 09/14/2026: From $165
    14

    Mon

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

    Tue

  • DEN–DCA, 09/16/2026: From $170
    16

    Wed

  • DEN–DCA, 09/17/2026: From $170
    17

    Thu

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

    Fri

  • DEN–DCA: cmp-view-offers-disclaimer. Find Offers
    19

    Sat

  • DEN–DCA, 09/20/2026: From $225
    20

    Sun

  • DEN–DCA, 09/21/2026: From $200
    21

    Mon

    • Range$165-$351

    *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:
    Denver International Airport
    Arriving at:
    Ronald Reagan National Airport
    Distance:
    1476 miles

    Route Information

    157† Weekly flights

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    Questions we hear the most

    There are 157 weekly flights from Denver to Washington, D.C. (Reagan National) on Southwest Airlines.
    To find the lowest fares by day and time to fly Denver 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 Denver 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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