Southwest® flights from Buffalo/Niagara Falls to Denver from $189

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Low fares from Buffalo/Niagara Falls to Denver

$

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 10/21/2026

One-way

Basic

From
$189
Seen: 11 hrs ago

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 10/26/2026

One-way

Basic

From
$189
Seen: 14 hrs ago

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 11/05/2026

One-way

Basic

From
$189
Seen: 9 hrs ago

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 11/03/2026

One-way

Basic

From
$189
Seen: 8 hrs ago

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 11/12/2026

One-way

Basic

From
$189
Seen: 21 hrs ago

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 12/12/2026

One-way

Basic

From
$189
Seen: 16 hrs ago

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Explore flights from Buffalo/Niagara Falls to Denver

Sep 2026
From$199*
Seen: 9 hrs ago
One Way/Basic
Oct 2026
From$189*
Seen: 13 hrs ago
One Way/Basic
Nov 2026
From$189*
Seen: 18 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $199
cmp-daily-histogram-bars-legend-max-price-aria-label $584
Displaying fares for September-2026
  • BUF–DEN, 09/10/2026: From $584
    10

    Thu

    SEP

  • BUF–DEN, 09/11/2026: From $584
    11

    Fri

  • BUF–DEN, 09/12/2026: From $584
    12

    Sat

  • BUF–DEN, 09/13/2026: From $584
    13

    Sun

  • BUF–DEN, 09/14/2026: From $584
    14

    Mon

  • BUF–DEN, 09/15/2026: From $584
    15

    Tue

  • BUF–DEN, 09/16/2026: From $484
    16

    Wed

  • BUF–DEN, 09/17/2026: From $484
    17

    Thu

  • BUF–DEN, 09/18/2026: From $494
    18

    Fri

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

    Sat

  • BUF–DEN, 09/20/2026: From $494
    20

    Sun

  • BUF–DEN, 09/21/2026: From $484
    21

    Mon

  • BUF–DEN, 09/22/2026: From $484
    22

    Tue

  • BUF–DEN, 09/23/2026: From $298
    23

    Wed

  • BUF–DEN, 09/24/2026: From $308
    24

    Thu

  • BUF–DEN, 09/25/2026: From $298
    25

    Fri

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    26

    Sat

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    27

    Sun

  • BUF–DEN, 09/28/2026: From $409
    28

    Mon

  • BUF–DEN, 09/29/2026: From $308
    29

    Tue

  • BUF–DEN, 09/30/2026: From $199
    30

    Wed

  • BUF–DEN, 10/01/2026: From $214
    01

    Thu

    OCT

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    02

    Fri

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

    Sat

  • BUF–DEN, 10/04/2026: From $270
    04

    Sun

  • BUF–DEN, 10/05/2026: From $345
    05

    Mon

  • BUF–DEN, 10/06/2026: From $214
    06

    Tue

  • BUF–DEN, 10/07/2026: From $214
    07

    Wed

  • BUF–DEN, 10/08/2026: From $270
    08

    Thu

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    09

    Fri

    • Range$199-$584

    *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:
    Buffalo Niagara International Airport
    Arriving at:
    Denver International Airport
    Average flight time:
    3 hours 39 minutes
    Distance:
    1359 miles

    Route Information

    156† 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 Buffalo/Niagara Falls to Denver is 3 hours 39 minutes.
    There are 156 weekly flights from Buffalo/Niagara Falls to Denver on Southwest Airlines.
    Yes, Southwest flies nonstop from Buffalo/Niagara Falls to Denver once per day from Monday through Friday.
    Yes, Southwest flies nonstop from Buffalo/Niagara Falls to Denver once per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Buffalo/Niagara Falls to Denver with Southwest, check out our Low Fare Calendar.
    You can rent a car at Denver International Airport book yours with your flight.
    Yes! Flights from Buffalo/Niagara Falls to Denver—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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