Flights to Northwest Washington from Baltimore - ￥11,500

View ￥11,500 flight on Tue, Aug 26, 2025Opens in a new window

Popular airlines from Baltimore to Northwest Washington

  • Peach

    Peach

  • Skymark Airlines

    Skymark Airlines

  • All Nippon Airways

    All Nippon Airways

  • Japan Airlines

    Japan Airlines

  • Jetstar Japan

    Jetstar Japan

  • Solaseed Air

    Solaseed Air

  • STARFLYER

    STARFLYER

  • 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 Baltimore to Northwest Washington (WAS-SEA)

Prices were available within the past 7 days and start at ￥11,500 for one-way flights and ￥23,000 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Oct 16 - Wed, Oct 22
BWI
Baltimore
SEA
Seattle
￥23,000 Roundtrip, found 3 hours ago
￥23,000
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Thu, Oct 16 from Baltimore to Seattle, returning Wed, Oct 22, priced at ￥23,000 found 3 hours ago
American Airlines
Thu, Oct 16 - Wed, Oct 22
BWI
Baltimore
SEA
Seattle
￥23,760 Roundtrip, found 3 hours ago
￥23,760
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Thu, Oct 16 from Baltimore to Seattle, returning Wed, Oct 22, priced at ￥23,760 found 3 hours ago
American Airlines
Thu, Oct 16 - Wed, Oct 22
BWI
Baltimore
SEA
Seattle
￥33,000 Roundtrip, found 3 hours ago
￥33,000
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Thu, Oct 16 from Baltimore to Seattle, returning Wed, Oct 22, priced at ￥33,000 found 3 hours ago
American Airlines
Thu, Oct 16 - Wed, Oct 22
BWI
Baltimore
SEA
Seattle
￥33,760 Roundtrip, found 3 hours ago
￥33,760
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Thu, Oct 16 from Baltimore to Seattle, returning Wed, Oct 22, priced at ￥33,760 found 3 hours ago
United
Thu, Oct 16 - Wed, Oct 22
BWI
Baltimore
SEA
Seattle
￥40,200 Roundtrip, found 3 hours ago
￥40,200
Roundtrip
found 3 hours ago
Select United flight, departing Thu, Oct 16 from Baltimore to Seattle, returning Wed, Oct 22, priced at ￥40,200 found 3 hours ago
Delta
Thu, Oct 16 - Wed, Oct 22
DCA
Washington
SEA
Seattle
￥40,230 Roundtrip, found 3 hours ago
￥40,230
Roundtrip
found 3 hours ago
Select Delta flight, departing Thu, Oct 16 from Washington to Seattle, returning Wed, Oct 22, priced at ￥40,230 found 3 hours ago
*Available to Expedia members.