Flights to Southwest Idaho from Seattle - ￥11,370

View ￥11,370 flight on Tue, Aug 19, 2025Opens in a new window

Popular airlines from Seattle to Southwest Idaho

  • American Airlines

    American Airlines

  • Delta

    Delta

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 40% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Seattle to Southwest Idaho (SEA-BOI)

Prices were available within the past 7 days and start at ￥11,370 for one-way flights and ￥22,970 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, Aug 8 - Wed, Aug 13
SEA
Seattle
BOI
Boise
￥22,970 Roundtrip, found 12 hours ago
￥22,970
Roundtrip
found 12 hours ago
Select Delta flight, departing Fri, Aug 8 from Seattle to Boise, returning Wed, Aug 13, priced at ￥22,970 found 12 hours ago
Delta
Fri, Aug 8 - Wed, Aug 13
SEA
Seattle
BOI
Boise
￥28,780 Roundtrip, found 12 hours ago
￥28,780
Roundtrip
found 12 hours ago
Select Delta flight, departing Fri, Aug 8 from Seattle to Boise, returning Wed, Aug 13, priced at ￥28,780 found 12 hours ago
Delta
Sun, Jul 20 - Sat, Aug 2
SEA
Seattle
BOI
Boise
￥48,730 Roundtrip, found 2 days ago
￥48,730
Roundtrip
found 2 days ago
Select Delta flight, departing Sun, Jul 20 from Seattle to Boise, returning Sat, Aug 2, priced at ￥48,730 found 2 days ago
Delta
Sun, Jul 20 - Sat, Aug 2
SEA
Seattle
BOI
Boise
￥51,640 Roundtrip, found 2 days ago
￥51,640
Roundtrip
found 2 days ago
Select Delta flight, departing Sun, Jul 20 from Seattle to Boise, returning Sat, Aug 2, priced at ￥51,640 found 2 days ago
United
Fri, Aug 8 - Wed, Aug 13
SEA
Seattle
BOI
Boise
￥52,150 Roundtrip, found 12 hours ago
￥52,150
Roundtrip
found 12 hours ago
Select United flight, departing Fri, Aug 8 from Seattle to Boise, returning Wed, Aug 13, priced at ￥52,150 found 12 hours ago
Alaska Airlines
Fri, Aug 8 - Wed, Aug 13
PAE
Seattle
BOI
Boise
￥120,310 Roundtrip, found 12 hours ago
￥120,310
Roundtrip
found 12 hours ago
Select Alaska Airlines flight, departing Fri, Aug 8 from Seattle to Boise, returning Wed, Aug 13, priced at ￥120,310 found 12 hours ago

Find the cheapest month to fly from Seattle (SEA) to Boise (BOI)

January is typically the cheapest month to fly

From ￥10,931 - ￥28,198 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.