Southwest® flights from Ontario/LA to Washington D.C. Reagan National from $176

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Low fares from Ontario/LA to Washington D.C. Reagan National

$

Ontario/LA (ONT)to

Washington D.C. Reagan National (DCA)
Depart: 10/24/2026

One-way

Basic

From
$176
Seen: 14 hrs ago

Ontario/LA (ONT)to

Washington D.C. Reagan National (DCA)
Depart: 11/10/2026

One-way

Basic

From
$176
Seen: 3 hrs ago

Ontario/LA (ONT)to

Washington D.C. Reagan National (DCA)
Depart: 12/17/2026

One-way

Basic

From
$176
Seen: 19 hrs ago

Ontario/LA (ONT)to

Washington D.C. Reagan National (DCA)
Depart: 11/09/2026

One-way

Basic

From
$176
Seen: 27 minutes ago

Ontario/LA (ONT)to

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

One-way

Basic

From
$176
Seen: 8 hrs ago

Ontario/LA (ONT)to

Washington D.C. Reagan National (DCA)
Depart: 11/02/2026

One-way

Basic

From
$176
Seen: 20 hrs ago

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Explore flights from Ontario/LA to Washington D.C. Reagan National

Sep 2026
From$284*
Seen: 10 hrs ago
One Way/Basic
Oct 2026
From$176*
Seen: 14 hrs ago
One Way/Basic
Nov 2026
From$176*
Seen: 20 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $176
cmp-daily-histogram-bars-legend-max-price-aria-label $382
Displaying fares for September-2026
  • ONT–DCA, 09/10/2026: From $372
    10

    Thu

    SEP

  • ONT–DCA, 09/11/2026: From $372
    11

    Fri

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

    Sat

  • ONT–DCA: cmp-view-offers-disclaimer. Find Offers
    13

    Sun

  • ONT–DCA: cmp-view-offers-disclaimer. Find Offers
    14

    Mon

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

    Tue

  • ONT–DCA, 09/16/2026: From $284
    16

    Wed

  • ONT–DCA, 09/17/2026: From $372
    17

    Thu

  • ONT–DCA, 09/18/2026: From $372
    18

    Fri

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

    Sat

  • ONT–DCA, 09/20/2026: From $372
    20

    Sun

  • ONT–DCA, 09/21/2026: From $372
    21

    Mon

  • ONT–DCA, 09/22/2026: From $284
    22

    Tue

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

    Wed

  • ONT–DCA, 09/24/2026: From $338
    24

    Thu

  • ONT–DCA, 09/25/2026: From $382
    25

    Fri

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

    Sat

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

    Sun

  • ONT–DCA, 09/28/2026: From $338
    28

    Mon

  • ONT–DCA, 09/29/2026: From $284
    29

    Tue

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

    Wed

  • ONT–DCA, 10/01/2026: From $231
    01

    Thu

    OCT

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

    Fri

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

    Sat

  • ONT–DCA: cmp-view-offers-disclaimer. Find Offers
    04

    Sun

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

    Mon

  • ONT–DCA, 10/06/2026: From $176
    06

    Tue

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

    Wed

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

    Thu

  • ONT–DCA, 10/09/2026: From $271
    09

    Fri

    • Range$176-$382

    *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:
    LA/Ontario International Airport
    Arriving at:
    Ronald Reagan National Airport
    Distance:
    2265 miles

    Route Information

    94† 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 94 weekly flights from Ontario/LA to Washington, D.C. (Reagan National) on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA 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 Ontario/LA 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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