Flights to Casco Bay Islands from Seattle - ￥35,950

View ￥35,950 flight on Fri, Aug 8, 2025Opens in a new window

Popular airlines from Seattle to Casco Bay Islands

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    Solaseed Air

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Cheap Flights from Seattle to Casco Bay Islands (SEA-PWM)

Prices were available within the past 7 days and start at ￥35,950 for one-way flights and ￥107,250 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Aug 8 - Sun, Aug 10
SEA
Seattle
PWM
Portland
￥107,250 Roundtrip, found 1 day ago
￥107,250
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 8 from Seattle to Portland, returning Sun, Aug 10, priced at ￥107,250 found 1 day ago
United
Fri, Aug 8 - Sun, Aug 10
SEA
Seattle
PWM
Portland
￥107,360 Roundtrip, found 1 day ago
￥107,360
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 8 from Seattle to Portland, returning Sun, Aug 10, priced at ￥107,360 found 1 day ago
United
Fri, Aug 8 - Sun, Aug 10
SEA
Seattle
PWM
Portland
￥111,980 Roundtrip, found 1 day ago
￥111,980
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 8 from Seattle to Portland, returning Sun, Aug 10, priced at ￥111,980 found 1 day ago
United
Fri, Aug 8 - Sun, Aug 10
SEA
Seattle
PWM
Portland
￥112,090 Roundtrip, found 1 day ago
￥112,090
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 8 from Seattle to Portland, returning Sun, Aug 10, priced at ￥112,090 found 1 day ago
United
Fri, Aug 8 - Sun, Aug 10
SEA
Seattle
PWM
Portland
￥113,480 Roundtrip, found 1 day ago
￥113,480
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 8 from Seattle to Portland, returning Sun, Aug 10, priced at ￥113,480 found 1 day ago
Delta
Fri, Aug 8 - Sun, Aug 10
SEA
Seattle
PWM
Portland
￥113,530 Roundtrip, found 1 day ago
￥113,530
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Aug 8 from Seattle to Portland, returning Sun, Aug 10, priced at ￥113,530 found 1 day ago

Find the cheapest month to fly from Seattle (SEA) to Portland (PWM)

September is typically the cheapest month to fly

From ￥32,682 - ￥67,572 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.