Flights to Casco Bay Islands from Washington - ￥13,130

View ￥13,130 flight on Mon, Sep 8, 2025Opens in a new window

Popular airlines from Washington to Casco Bay Islands

  • 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 Casco Bay Islands (WAS-PWM)

Prices were available within the past 7 days and start at ￥13,130 for one-way flights and ￥49,690 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Aug 13 - Mon, Aug 18
IAD
Washington
PWM
Portland
￥49,690 Roundtrip, found 1 day ago
￥49,690
Roundtrip
found 1 day ago
Select United flight, departing Wed, Aug 13 from Washington to Portland, returning Mon, Aug 18, priced at ￥49,690 found 1 day ago
United
Wed, Aug 13 - Mon, Aug 18
DCA
Washington
PWM
Portland
￥51,120 Roundtrip, found 1 day ago
￥51,120
Roundtrip
found 1 day ago
Select United flight, departing Wed, Aug 13 from Washington to Portland, returning Mon, Aug 18, priced at ￥51,120 found 1 day ago
American Airlines
Wed, Aug 13 - Mon, Aug 18
DCA
Washington
PWM
Portland
￥51,620 Roundtrip, found 1 day ago
￥51,620
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Aug 13 from Washington to Portland, returning Mon, Aug 18, priced at ￥51,620 found 1 day ago
United
Wed, Aug 13 - Mon, Aug 18
IAD
Washington
PWM
Portland
￥54,600 Roundtrip, found 1 day ago
￥54,600
Roundtrip
found 1 day ago
Select United flight, departing Wed, Aug 13 from Washington to Portland, returning Mon, Aug 18, priced at ￥54,600 found 1 day ago
United
Wed, Aug 13 - Mon, Aug 18
IAD
Washington
PWM
Portland
￥56,030 Roundtrip, found 1 day ago
￥56,030
Roundtrip
found 1 day ago
Select United flight, departing Wed, Aug 13 from Washington to Portland, returning Mon, Aug 18, priced at ￥56,030 found 1 day ago
Delta
Wed, Aug 13 - Mon, Aug 18
IAD
Washington
PWM
Portland
￥56,810 Roundtrip, found 1 day ago
￥56,810
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Aug 13 from Washington to Portland, returning Mon, Aug 18, priced at ￥56,810 found 1 day ago

Find the cheapest month to fly from Washington (WAS) to Portland (PWM)

January is typically the cheapest month to fly

From ￥20,222 - ￥56,874 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.