Cheap flights from Boston to Casco Bay Islands

View AU$253 flight on Tue, 23 Sep. 2025Opens in a new window

Popular airlines from Boston to Casco Bay Islands

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Cheap Flights from Boston (BOS) 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.

Delta
Tue, 23 Sep. - Tue, 30 Sep.
BOS
Boston
PWM
Portland
AU$459 Return, found 1 day ago
AU$459
Return
found 1 day ago
Select Delta flight, departing Tue, 23 Sep. from Boston to Portland, returning Tue, 30 Sep., priced at AU$459 found 1 day ago
United
Tue, 23 Sep. - Tue, 30 Sep.
BOS
Boston
PWM
Portland
AU$598 Return, found 1 day ago
AU$598
Return
found 1 day ago
Select United flight, departing Tue, 23 Sep. from Boston to Portland, returning Tue, 30 Sep., priced at AU$598 found 1 day ago
United
Tue, 23 Sep. - Tue, 30 Sep.
BOS
Boston
PWM
Portland
AU$613 Return, found 1 day ago
AU$613
Return
found 1 day ago
Select United flight, departing Tue, 23 Sep. from Boston to Portland, returning Tue, 30 Sep., priced at AU$613 found 1 day ago
Delta
Tue, 23 Sep. - Tue, 30 Sep.
BOS
Boston
PWM
Portland
AU$628 Return, found 1 day ago
AU$628
Return
found 1 day ago
Select Delta flight, departing Tue, 23 Sep. from Boston to Portland, returning Tue, 30 Sep., priced at AU$628 found 1 day ago
Delta
Tue, 23 Sep. - Tue, 30 Sep.
BOS
Boston
PWM
Portland
AU$641 Return, found 1 day ago
AU$641
Return
found 1 day ago
Select Delta flight, departing Tue, 23 Sep. from Boston to Portland, returning Tue, 30 Sep., priced at AU$641 found 1 day ago
Delta
Tue, 23 Sep. - Tue, 30 Sep.
BOS
Boston
PWM
Portland
AU$643 Return, found 1 day ago
AU$643
Return
found 1 day ago
Select Delta flight, departing Tue, 23 Sep. from Boston to Portland, returning Tue, 30 Sep., priced at AU$643 found 1 day ago

Find the cheapest month to fly from Boston (BOS) to Portland (PWM)

September is typically the cheapest month to fly

From AU$232 - AU$578 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.