Cheap flights from Washington to West Boise

View AU$393 flight on Thu, 28 Aug. 2025Opens in a new window

Popular airlines from Washington to West Boise

  • Alaska Airlines

    Alaska Airlines

  • United

    United

  • Delta

    Delta

  • American Airlines

    American Airlines

  • Southwest Airlines

    Southwest Airlines

  • Spirit Airlines

    Spirit Airlines

  • Frontier Airlines

    Frontier Airlines

  • 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 35% 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 Washington (WAS) to West Boise (BOI)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, 28 Aug. - Thu, 4 Sep.
IAD
Washington
BOI
Boise
AU$621 Return, found 6 days ago
AU$621
Return
found 6 days ago
Select United flight, departing Thu, 28 Aug. from Washington to Boise, returning Thu, 4 Sep., priced at AU$621 found 6 days ago
United
Thu, 28 Aug. - Thu, 4 Sep.
IAD
Washington
BOI
Boise
AU$622 Return, found 6 days ago
AU$622
Return
found 6 days ago
Select United flight, departing Thu, 28 Aug. from Washington to Boise, returning Thu, 4 Sep., priced at AU$622 found 6 days ago
Alaska Airlines
Thu, 28 Aug. - Thu, 4 Sep.
IAD
Washington
BOI
Boise
AU$665 Return, found 6 days ago
AU$665
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 28 Aug. from Washington to Boise, returning Thu, 4 Sep., priced at AU$665 found 6 days ago
Alaska Airlines
Thu, 28 Aug. - Thu, 4 Sep.
IAD
Washington
BOI
Boise
AU$666 Return, found 6 days ago
AU$666
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 28 Aug. from Washington to Boise, returning Thu, 4 Sep., priced at AU$666 found 6 days ago
American Airlines
Thu, 28 Aug. - Thu, 4 Sep.
DCA
Washington
BOI
Boise
AU$693 Return, found 6 days ago
AU$693
Return
found 6 days ago
Select American Airlines flight, departing Thu, 28 Aug. from Washington to Boise, returning Thu, 4 Sep., priced at AU$693 found 6 days ago
Delta
Thu, 28 Aug. - Thu, 4 Sep.
DCA
Washington
BOI
Boise
AU$727 Return, found 6 days ago
AU$727
Return
found 6 days ago
Select Delta flight, departing Thu, 28 Aug. from Washington to Boise, returning Thu, 4 Sep., priced at AU$727 found 6 days ago

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

October is typically the cheapest month to fly

From AU$281 - AU$932 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.