Flights to San Juan Island from Washington - ￥11,500

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

Popular airlines from Washington to San Juan Island

  • 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 Washington to San Juan Island (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 6 days ago
￥23,000
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Oct 16 from Baltimore to Seattle, returning Wed, Oct 22, priced at ￥23,000 found 6 days ago
American Airlines
Thu, Oct 16 - Wed, Oct 22
BWI
Baltimore
SEA
Seattle
￥23,760 Roundtrip, found 6 days ago
￥23,760
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Oct 16 from Baltimore to Seattle, returning Wed, Oct 22, priced at ￥23,760 found 6 days ago
American Airlines
Sat, Sep 27 - Thu, Oct 2
IAD
Washington
SEA
Seattle
￥28,820 Roundtrip, found 5 days ago
￥28,820
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Sep 27 from Washington to Seattle, returning Thu, Oct 2, priced at ￥28,820 found 5 days ago
Delta
Sat, Sep 27 - Thu, Oct 2
IAD
Washington
SEA
Seattle
￥40,160 Roundtrip, found 5 days ago
￥40,160
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Sep 27 from Washington to Seattle, returning Thu, Oct 2, priced at ￥40,160 found 5 days ago
Hawaiian Airlines
Sat, Aug 16 - Sat, Aug 30
IAD
Washington
SEA
Seattle
￥40,520 Roundtrip, found 1 day ago
￥40,520
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Sat, Aug 16 from Washington to Seattle, returning Sat, Aug 30, priced at ￥40,520 found 1 day ago
United
Sat, Aug 16 - Tue, Sep 2
IAD
Washington
SEA
Seattle
￥55,140 Roundtrip, found 1 day ago
￥55,140
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 16 from Washington to Seattle, returning Tue, Sep 2, priced at ￥55,140 found 1 day ago
*Available to Expedia members.