Southwest® flights from Baltimore/Washington to Boise from $152

Promo Code

Low fares from Baltimore/Washington to Boise

$

Baltimore/Washington (BWI)to

Boise (BOI)
Depart: 10/27/2026

One-way

Basic

From
$152
Seen: 19 hrs ago

Baltimore/Washington (BWI)to

Boise (BOI)
Depart: 11/10/2026

One-way

Basic

From
$157
Seen: 22 hrs ago

Baltimore/Washington (BWI)to

Boise (BOI)
Depart: 11/19/2026

One-way

Basic

From
$162
Seen: 17 hrs ago

Baltimore/Washington (BWI)to

Boise (BOI)
Depart: 11/18/2026

One-way

Basic

From
$162
Seen: 16 hrs ago

Baltimore/Washington (BWI)to

Boise (BOI)
Depart: 12/09/2026

One-way

Basic

From
$162
Seen: 13 hrs ago

Baltimore/Washington (BWI)to

Boise (BOI)
Depart: 11/11/2026

One-way

Basic

From
$162
Seen: 6 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Baltimore/Washington to Boise

Sep 2026
From$279*
Seen: 4 hrs ago
One Way/Basic
Oct 2026
From$152*
Seen: 19 hrs ago
One Way/Basic
Nov 2026
From$157*
Seen: 22 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $167
cmp-daily-histogram-bars-legend-max-price-aria-label $382
Displaying fares for September-2026
  • BWI–BOI, 09/12/2026: From $294
    12

    Sat

    SEP

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    13

    Sun

  • BWI–BOI, 09/14/2026: From $382
    14

    Mon

  • BWI–BOI, 09/15/2026: From $284
    15

    Tue

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

    Wed

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    17

    Thu

  • BWI–BOI, 09/18/2026: From $382
    18

    Fri

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    19

    Sat

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    20

    Sun

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    21

    Mon

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    22

    Tue

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    23

    Wed

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    24

    Thu

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    25

    Fri

  • BWI–BOI, 09/26/2026: From $279
    26

    Sat

  • BWI–BOI, 09/27/2026: From $319
    27

    Sun

  • BWI–BOI, 09/28/2026: From $314
    28

    Mon

  • BWI–BOI, 09/29/2026: From $279
    29

    Tue

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    30

    Wed

  • BWI–BOI, 10/01/2026: From $319
    01

    Thu

    OCT

  • BWI–BOI, 10/02/2026: From $203
    02

    Fri

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    03

    Sat

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    04

    Sun

  • BWI–BOI, 10/05/2026: From $203
    05

    Mon

  • BWI–BOI, 10/06/2026: From $167
    06

    Tue

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    07

    Wed

  • BWI–BOI, 10/08/2026: From $255
    08

    Thu

  • BWI–BOI: cmp-view-offers-disclaimer. Find Offers
    09

    Fri

  • BWI–BOI, 10/10/2026: From $203
    10

    Sat

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

    Sun

    • Range$167-$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:
    Balt./Wash. International Airport
    Arriving at:
    Boise Airport
    Distance:
    2059 miles

    Route Information

    127† 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 127 weekly flights from Baltimore/Washington to Boise on Southwest Airlines.
    To find the lowest fares by day and time to fly Baltimore/Washington to Boise with Southwest, check out our Low Fare Calendar.
    You can rent a car at Boise Airport book yours with your flight.
    Yes! Flights from Baltimore/Washington to Boise—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.

    Explore Flights from Other Popular Origins

    Popular Flights from Baltimore/Washington