Cheap flights from San Francisco to Casco Bay Islands

View AU$211 flight on Tue, 23 Sep. 2025Opens in a new window

Popular airlines from San Francisco to Casco Bay Islands

  • American Airlines

    American Airlines

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • United

    United

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, 23 Sep. - Tue, 30 Sep.
SFO
San Francisco
PWM
Portland
AU$381 Return, found 20 hours ago
AU$381
Return
found 20 hours ago
Select American Airlines flight, departing Tue, 23 Sep. from San Francisco to Portland, returning Tue, 30 Sep., priced at AU$381 found 20 hours ago
Delta
Tue, 23 Sep. - Tue, 30 Sep.
SFO
San Francisco
PWM
Portland
AU$420 Return, found 20 hours ago
AU$420
Return
found 20 hours ago
Select Delta flight, departing Tue, 23 Sep. from San Francisco to Portland, returning Tue, 30 Sep., priced at AU$420 found 20 hours ago
Delta
Tue, 23 Sep. - Tue, 30 Sep.
SFO
San Francisco
PWM
Portland
AU$445 Return, found 20 hours ago
AU$445
Return
found 20 hours ago
Select Delta flight, departing Tue, 23 Sep. from San Francisco to Portland, returning Tue, 30 Sep., priced at AU$445 found 20 hours ago
United
Tue, 23 Sep. - Tue, 30 Sep.
SFO
San Francisco
PWM
Portland
AU$477 Return, found 20 hours ago
AU$477
Return
found 20 hours ago
Select United flight, departing Tue, 23 Sep. from San Francisco to Portland, returning Tue, 30 Sep., priced at AU$477 found 20 hours ago
American Airlines
Tue, 23 Sep. - Tue, 30 Sep.
SFO
San Francisco
PWM
Portland
AU$478 Return, found 20 hours ago
AU$478
Return
found 20 hours ago
Select American Airlines flight, departing Tue, 23 Sep. from San Francisco to Portland, returning Tue, 30 Sep., priced at AU$478 found 20 hours ago
Alaska Airlines
Tue, 23 Sep. - Tue, 30 Sep.
SFO
San Francisco
PWM
Portland
AU$504 Return, found 20 hours ago
AU$504
Return
found 20 hours ago
Select Alaska Airlines flight, departing Tue, 23 Sep. from San Francisco to Portland, returning Tue, 30 Sep., priced at AU$504 found 20 hours ago

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

September is typically the cheapest month to fly

From AU$310 - AU$1,033 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.