Cheap flights from Washington to Southern Idaho

View AU$225 flight on Tue, 19 Aug. 2025Opens in a new window

Popular airlines from Washington to Southern Idaho

  • Jetstar

    Jetstar

  • Qantas Airways

    Qantas Airways

  • Virgin Australia

    Virgin Australia

  • Scoot

    Scoot

  • American Airlines

    American Airlines

  • Emirates

    Emirates

  • United

    United

  • 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 Southern Idaho (IDA)

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.

Alaska Airlines
Mon, 15 Sep. - Fri, 19 Sep.
BWI
Baltimore
IDA
Idaho Falls
AU$620 Return, found 6 days ago
AU$620
Return
found 6 days ago
Select Alaska Airlines flight, departing Mon, 15 Sep. from Baltimore to Idaho Falls, returning Fri, 19 Sep., priced at AU$620 found 6 days ago
Delta
Tue, 19 Aug. - Tue, 26 Aug.
IAD
Washington
JAC
Jackson
AU$624 Return, found 4 days ago
AU$624
Return
found 4 days ago
Select Delta flight, departing Tue, 19 Aug. from Washington to Jackson, returning Tue, 26 Aug., priced at AU$624 found 4 days ago
American Airlines
Sun, 24 May - Fri, 29 May
DCA
Washington
JAC
Jackson
AU$636 Return, found 2 days ago
AU$636
Return
found 2 days ago
Select American Airlines flight, departing Sun, 24 May from Washington to Jackson, returning Fri, 29 May, priced at AU$636 found 2 days ago
American Airlines
Mon, 15 Sep. - Fri, 19 Sep.
DCA
Washington
IDA
Idaho Falls
AU$648 Return, found 6 days ago
AU$648
Return
found 6 days ago
Select American Airlines flight, departing Mon, 15 Sep. from Washington to Idaho Falls, returning Fri, 19 Sep., priced at AU$648 found 6 days ago
American Airlines
Sun, 24 May - Fri, 29 May
BWI
Baltimore
JAC
Jackson
AU$656 Return, found 2 days ago
AU$656
Return
found 2 days ago
Select American Airlines flight, departing Sun, 24 May from Baltimore to Jackson, returning Fri, 29 May, priced at AU$656 found 2 days ago
United
Tue, 19 Aug. - Tue, 26 Aug.
IAD
Washington
JAC
Jackson
AU$692 Return, found 4 days ago
AU$692
Return
found 4 days ago
Select United flight, departing Tue, 19 Aug. from Washington to Jackson, returning Tue, 26 Aug., priced at AU$692 found 4 days ago

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

October is typically the cheapest month to fly

From AU$267 - AU$899 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.