Flights to Southwest Idaho from Washington - ￥43,040

View ￥43,040 flight on Fri, Aug 1, 2025Opens in a new window

Popular airlines from Washington to Southwest Idaho

  • Peach

    Peach

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    Skymark Airlines

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    All Nippon Airways

  • Japan Airlines

    Japan Airlines

  • Jetstar Japan

    Jetstar Japan

  • Solaseed Air

    Solaseed Air

  • STARFLYER

    STARFLYER

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Cheap Flights from Washington to Southwest Idaho (WAS-BOI)

Prices were available within the past 7 days and start at ￥43,040 for one-way flights and ￥44,990 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Aug 9 - Thu, Aug 14
IAD
Washington
BOI
Boise
￥44,990 Roundtrip, found 5 days ago
￥44,990
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Aug 9 from Washington to Boise, returning Thu, Aug 14, priced at ￥44,990 found 5 days ago
Delta
Sat, Aug 9 - Thu, Aug 14
IAD
Washington
BOI
Boise
￥52,730 Roundtrip, found 5 days ago
￥52,730
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Aug 9 from Washington to Boise, returning Thu, Aug 14, priced at ￥52,730 found 5 days ago
Delta
Sat, Aug 9 - Thu, Aug 14
IAD
Washington
BOI
Boise
￥56,810 Roundtrip, found 5 days ago
￥56,810
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Aug 9 from Washington to Boise, returning Thu, Aug 14, priced at ￥56,810 found 5 days ago
Delta
Sat, Aug 9 - Thu, Aug 14
IAD
Washington
BOI
Boise
￥61,440 Roundtrip, found 5 days ago
￥61,440
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Aug 9 from Washington to Boise, returning Thu, Aug 14, priced at ￥61,440 found 5 days ago
United
Sat, Aug 9 - Thu, Aug 14
IAD
Washington
BOI
Boise
￥67,030 Roundtrip, found 5 days ago
￥67,030
Roundtrip
found 5 days ago
Select United flight, departing Sat, Aug 9 from Washington to Boise, returning Thu, Aug 14, priced at ￥67,030 found 5 days ago
American Airlines
Sat, Aug 9 - Thu, Aug 14
IAD
Washington
BOI
Boise
￥87,670 Roundtrip, found 5 days ago
￥87,670
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Aug 9 from Washington to Boise, returning Thu, Aug 14, priced at ￥87,670 found 5 days ago

Find the cheapest month to fly from Washington (WAS) to Boise (BOI)

October is typically the cheapest month to fly

From ￥25,530 - ￥83,246 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.