Cheap flights from Indianapolis to Northwest Washington

View AU$150 flight on Mon, 18 Aug. 2025Opens in a new window

Popular airlines from Indianapolis to Northwest Washington

  • 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 Indianapolis (IND) to Northwest Washington (SEA)

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.

American Airlines
Fri, 22 Aug. - Tue, 26 Aug.
IND
Indianapolis
SEA
Seattle
AU$299 Return, found 3 days ago
AU$299
Return
found 3 days ago
Select American Airlines flight, departing Fri, 22 Aug. from Indianapolis to Seattle, returning Tue, 26 Aug., priced at AU$299 found 3 days ago
Delta
Fri, 22 Aug. - Tue, 26 Aug.
IND
Indianapolis
SEA
Seattle
AU$299 Return, found 3 days ago
AU$299
Return
found 3 days ago
Select Delta flight, departing Fri, 22 Aug. from Indianapolis to Seattle, returning Tue, 26 Aug., priced at AU$299 found 3 days ago
Delta
Tue, 7 Oct. - Tue, 14 Oct.
IND
Indianapolis
SEA
Seattle
AU$329 Return, found 17 hours ago
AU$329
Return
found 17 hours ago
Select Delta flight, departing Tue, 7 Oct. from Indianapolis to Seattle, returning Tue, 14 Oct., priced at AU$329 found 17 hours ago
Hawaiian Airlines
Sat, 11 Oct. - Tue, 14 Oct.
IND
Indianapolis
SEA
Seattle
AU$390 Return, found 17 hours ago
AU$390
Return
found 17 hours ago
Select Hawaiian Airlines flight, departing Sat, 11 Oct. from Indianapolis to Seattle, returning Tue, 14 Oct., priced at AU$390 found 17 hours ago
United
Fri, 22 Aug. - Tue, 26 Aug.
IND
Indianapolis
SEA
Seattle
AU$400 Return, found 3 days ago
AU$400
Return
found 3 days ago
Select United flight, departing Fri, 22 Aug. from Indianapolis to Seattle, returning Tue, 26 Aug., priced at AU$400 found 3 days ago
Alaska Airlines
Fri, 22 Aug. - Tue, 26 Aug.
IND
Indianapolis
SEA
Seattle
AU$439 Return, found 3 days ago
AU$439
Return
found 3 days ago
Select Alaska Airlines flight, departing Fri, 22 Aug. from Indianapolis to Seattle, returning Tue, 26 Aug., priced at AU$439 found 3 days ago
*Available to Expedia members.