Southwest® flights from Boise to Denver from $99

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Low fares from Boise to Denver

$

Boise (BOI)to

Denver (DEN)
Depart: 09/11/2026

One-way

Basic

From
$99
Seen: 4 hrs ago

Boise (BOI)to

Denver (DEN)
Depart: 09/05/2026

One-way

Basic

From
$99
Seen: 8 hrs ago

Boise (BOI)to

Denver (DEN)
Depart: 09/05/2026

One-way

Choice

From
$139
Seen: 8 hrs ago

Boise (BOI)to

Denver (DEN)
Depart: 09/11/2026

One-way

Choice

From
$139
Seen: 4 hrs ago

Boise (BOI)to

Denver (DEN)
Depart: 10/29/2026

One-way

Basic

From
$145
Seen: 18 hrs ago

Boise (BOI)to

Denver (DEN)
Depart: 09/28/2026

One-way

Basic

From
$145
Seen: 13 hrs ago

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Explore flights from Boise to Denver

Aug 2026
From$145*
Seen: 9 hrs ago
One Way/Basic
Sep 2026
From$99*
Seen: 8 hrs ago
One Way/Basic
Oct 2026
From$145*
Seen: 18 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $145
cmp-daily-histogram-bars-legend-max-price-aria-label $396
Displaying fares for August-2026
  • BOI–DEN, 08/01/2026: From $396
    01

    Sat

    AUG

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    02

    Sun

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    03

    Mon

  • BOI–DEN, 08/04/2026: From $396
    04

    Tue

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    05

    Wed

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    06

    Thu

  • BOI–DEN, 08/07/2026: From $321
    07

    Fri

  • BOI–DEN, 08/08/2026: From $321
    08

    Sat

  • BOI–DEN, 08/09/2026: From $321
    09

    Sun

  • BOI–DEN, 08/10/2026: From $321
    10

    Mon

  • BOI–DEN: cmp-view-offers-disclaimer. Find Offers
    11

    Tue

  • BOI–DEN, 08/12/2026: From $321
    12

    Wed

  • BOI–DEN, 08/13/2026: From $321
    13

    Thu

  • BOI–DEN, 08/14/2026: From $201
    14

    Fri

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    15

    Sat

  • BOI–DEN: cmp-view-offers-disclaimer. Find Offers
    16

    Sun

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    17

    Mon

  • BOI–DEN, 08/18/2026: From $201
    18

    Tue

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    19

    Wed

  • BOI–DEN, 08/20/2026: From $201
    20

    Thu

  • BOI–DEN, 08/21/2026: From $155
    21

    Fri

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    22

    Sat

  • BOI–DEN, 08/23/2026: From $181
    23

    Sun

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    24

    Mon

  • BOI–DEN, 08/25/2026: From $145
    25

    Tue

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    26

    Wed

  • BOI–DEN, 08/27/2026: From $145
    27

    Thu

  • BOI–DEN, 08/28/2026: From $155
    28

    Fri

  • BOI–DEN, 08/29/2026: From $145
    29

    Sat

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    30

    Sun

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    31

    Mon

    • Range$145-$396

    *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:
    Boise Airport
    Arriving at:
    Denver International Airport
    Average flight time:
    1 hour 48 minutes
    Distance:
    649 miles

    Route Information

    149† Weekly flights
    • 3‡ Nonstop flights per day Monday through Friday
    • 3‡ Nonstop flights on Saturday
    • 3‡ Nonstop flights 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 Boise to Denver is 1 hour 48 minutes.
    There are 149 weekly flights from Boise to Denver on Southwest Airlines.
    Yes, Southwest flies nonstop from Boise to Denver 3 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Boise to Denver 3 times per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Boise 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 Boise 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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