Flights to Casco Bay Islands from San Francisco - ￥20,380

View ￥20,380 flight on Tue, Aug 5, 2025Opens in a new window

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Cheap Flights from San Francisco to Casco Bay Islands (SJC-PWM)

Prices were available within the past 7 days and start at ￥20,380 for one-way flights and ￥68,420 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Aug 12 - Sun, Aug 17
SFO
San Francisco
PWM
Portland
￥68,420 Roundtrip, found 2 days ago
￥68,420
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Aug 12 from San Francisco to Portland, returning Sun, Aug 17, priced at ￥68,420 found 2 days ago
American Airlines
Tue, Aug 12 - Sun, Aug 17
SFO
San Francisco
PWM
Portland
￥69,190 Roundtrip, found 2 days ago
￥69,190
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Aug 12 from San Francisco to Portland, returning Sun, Aug 17, priced at ￥69,190 found 2 days ago
American Airlines
Tue, Aug 12 - Sun, Aug 17
SFO
San Francisco
PWM
Portland
￥70,360 Roundtrip, found 2 days ago
￥70,360
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Aug 12 from San Francisco to Portland, returning Sun, Aug 17, priced at ￥70,360 found 2 days ago
American Airlines
Tue, Aug 12 - Sun, Aug 17
SFO
San Francisco
PWM
Portland
￥77,560 Roundtrip, found 2 days ago
￥77,560
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Aug 12 from San Francisco to Portland, returning Sun, Aug 17, priced at ￥77,560 found 2 days ago
Delta
Fri, Aug 1 - Mon, Aug 4
SFO
San Francisco
PWM
Portland
￥77,900 Roundtrip, found 4 days ago
￥77,900
Roundtrip
found 4 days ago
Select Delta flight, departing Fri, Aug 1 from San Francisco to Portland, returning Mon, Aug 4, priced at ￥77,900 found 4 days ago
United
Tue, Aug 12 - Sun, Aug 17
SFO
San Francisco
PWM
Portland
￥84,120 Roundtrip, found 2 days ago
￥84,120
Roundtrip
found 2 days ago
Select United flight, departing Tue, Aug 12 from San Francisco to Portland, returning Sun, Aug 17, priced at ￥84,120 found 2 days ago

Find the cheapest month to fly from San Francisco (SFO) to Portland (PWM)

September is typically the cheapest month to fly

From ￥29,605 - ￥84,229 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.