Southwest® flights from Washington D.C. Reagan National to Buffalo/Niagara Falls from $251

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Low fares from Washington D.C. Reagan National to Buffalo/Niagara Falls

$

Washington D.C. Reagan National (DCA)to

Buffalo/Niagara Falls (BUF)
Depart: 12/13/2026

One-way

Basic

From
$251
Seen: 23 hrs ago

Washington D.C. Reagan National (DCA)to

Buffalo/Niagara Falls (BUF)
Depart: 11/26/2026

One-way

Basic

From
$251
Seen: 22 hrs ago

Washington D.C. Reagan National (DCA)to

Buffalo/Niagara Falls (BUF)
Depart: 12/17/2026

One-way

Basic

From
$251
Seen: 19 hrs ago

Washington D.C. Reagan National (DCA)to

Buffalo/Niagara Falls (BUF)
Depart: 12/30/2026

One-way

Basic

From
$251
Seen: 23 hrs ago

Washington D.C. Reagan National (DCA)to

Buffalo/Niagara Falls (BUF)
Depart: 11/22/2026

One-way

Basic

From
$251
Seen: 6 hrs ago

Washington D.C. Reagan National (DCA)to

Buffalo/Niagara Falls (BUF)
Depart: 10/31/2026

One-way

Basic

From
$251
Seen: 4 hrs ago

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Explore flights from Washington D.C. Reagan National to Buffalo/Niagara Falls

Oct 2026
From$251*
Seen: 4 hrs ago
One Way/Basic
Nov 2026
From$251*
Seen: 6 hrs ago
One Way/Basic
Dec 2026
From$251*
Seen: 23 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $251
Displaying fares for October-2026
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    Mon

  • DCA–BUF, 10/06/2026: From $441
    06

    Tue

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    07

    Wed

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  • DCA–BUF, 10/09/2026: From $395
    09

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    10

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    11

    Sun

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    12

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    13

    Tue

  • DCA–BUF, 10/14/2026: From $395
    14

    Wed

  • DCA–BUF, 10/15/2026: From $284
    15

    Thu

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    16

    Fri

  • DCA–BUF, 10/17/2026: From $284
    17

    Sat

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    18

    Sun

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    19

    Mon

  • DCA–BUF, 10/20/2026: From $284
    20

    Tue

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    21

    Wed

  • DCA–BUF, 10/22/2026: From $262
    22

    Thu

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    23

    Fri

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    24

    Sat

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    25

    Sun

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    26

    Mon

  • DCA–BUF, 10/27/2026: From $262
    27

    Tue

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    28

    Wed

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    29

    Thu

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    30

    Fri

  • DCA–BUF, 10/31/2026: From $251
    31

    Sat

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    01

    Sun

    NOV

    • Range$251-$441

    *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:
    Buffalo Niagara International Airport
    Distance:
    296 miles

    Route Information

    26† 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 26 weekly flights from Washington, D.C. (Reagan National) to Buffalo/Niagara Falls on Southwest Airlines.
    To find the lowest fares by day and time to fly Washington, D.C. (Reagan National) to Buffalo/Niagara Falls with Southwest, check out our Low Fare Calendar.
    You can rent a car at Buffalo Niagara International Airport book yours with your flight.
    Yes! Flights from Washington, D.C. (Reagan National) to Buffalo/Niagara Falls—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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