Southwest® flights from Denver to Buffalo/Niagara Falls from $181

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Low fares from Denver to Buffalo/Niagara Falls

$

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 09/11/2026

One-way

Basic

From
$181
Seen: 12 hrs ago

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 10/30/2026

One-way

Basic

From
$181
Seen: 5 hrs ago

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 10/28/2026

One-way

Basic

From
$194
Seen: 22 hrs ago

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 09/01/2026

One-way

Basic

From
$194
Seen: 3 hrs ago

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 11/05/2026

One-way

Basic

From
$194
Seen: 6 hrs ago

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 09/26/2026

One-way

Basic

From
$194
Seen: 9 hrs ago

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Explore flights from Denver to Buffalo/Niagara Falls

Aug 2026
From$204*
Seen: 1 hour ago
One Way/Basic
Sep 2026
From$181*
Seen: 12 hrs ago
One Way/Basic
Oct 2026
From$181*
Seen: 5 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $194
cmp-daily-histogram-bars-legend-max-price-aria-label $574
Displaying fares for August-2026
  • DEN–BUF, 08/02/2026: From $574
    02

    Sun

    AUG

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

    Mon

  • DEN–BUF, 08/04/2026: From $574
    04

    Tue

  • DEN–BUF, 08/05/2026: From $574
    05

    Wed

  • DEN–BUF, 08/06/2026: From $574
    06

    Thu

  • DEN–BUF, 08/07/2026: From $474
    07

    Fri

  • DEN–BUF, 08/08/2026: From $474
    08

    Sat

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    09

    Sun

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    10

    Mon

  • DEN–BUF, 08/11/2026: From $474
    11

    Tue

  • DEN–BUF, 08/12/2026: From $474
    12

    Wed

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    13

    Thu

  • DEN–BUF, 08/14/2026: From $298
    14

    Fri

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    15

    Sat

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    16

    Sun

  • DEN–BUF, 08/17/2026: From $298
    17

    Mon

  • DEN–BUF, 08/18/2026: From $298
    18

    Tue

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    19

    Wed

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    20

    Thu

  • DEN–BUF, 08/21/2026: From $226
    21

    Fri

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    22

    Sat

  • DEN–BUF, 08/23/2026: From $260
    23

    Sun

  • DEN–BUF, 08/24/2026: From $204
    24

    Mon

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    25

    Tue

  • DEN–BUF, 08/26/2026: From $204
    26

    Wed

  • DEN–BUF, 08/27/2026: From $204
    27

    Thu

  • DEN–BUF, 08/28/2026: From $216
    28

    Fri

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    29

    Sat

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    30

    Sun

  • DEN–BUF, 08/31/2026: From $204
    31

    Mon

  • DEN–BUF, 09/01/2026: From $194
    01

    Tue

    SEP

    • Range$194-$574

    *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:
    Buffalo Niagara International Airport
    Average flight time:
    3 hours 3 minutes
    Distance:
    1359 miles

    Route Information

    138† Weekly flights
    • 1‡ Nonstop flight per day Monday through Friday
    • 1‡ Nonstop flight on Saturday
    • 1‡ Nonstop flight on Sunday

    † 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

    The average flight time from Denver to Buffalo/Niagara Falls is 3 hours 3 minutes.
    There are 138 weekly flights from Denver to Buffalo/Niagara Falls on Southwest Airlines.
    Yes, Southwest flies nonstop from Denver to Buffalo/Niagara Falls once per day from Monday through Friday.
    Yes, Southwest flies nonstop from Denver to Buffalo/Niagara Falls once per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Denver 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 Denver 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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