Cheap flights from Washington to Great Diamond Island

View AU$145 flight on Tue, 2 Sep. 2025Opens in a new window

Popular airlines from Washington to Great Diamond Island

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Cheap Flights from Washington (WAS) to Great Diamond Island (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, 2 Sep. - Tue, 9 Sep.
DCA
Washington
PWM
Portland
AU$274 Return, found 4 days ago
AU$274
Return
found 4 days ago
Select American Airlines flight, departing Tue, 2 Sep. from Washington to Portland, returning Tue, 9 Sep., priced at AU$274 found 4 days ago
Delta
Tue, 2 Sep. - Tue, 9 Sep.
IAD
Washington
PWM
Portland
AU$304 Return, found 4 days ago
AU$304
Return
found 4 days ago
Select Delta flight, departing Tue, 2 Sep. from Washington to Portland, returning Tue, 9 Sep., priced at AU$304 found 4 days ago
Delta
Tue, 2 Sep. - Tue, 9 Sep.
DCA
Washington
PWM
Portland
AU$304 Return, found 4 days ago
AU$304
Return
found 4 days ago
Select Delta flight, departing Tue, 2 Sep. from Washington to Portland, returning Tue, 9 Sep., priced at AU$304 found 4 days ago
American Airlines
Tue, 2 Sep. - Tue, 9 Sep.
DCA
Washington
PWM
Portland
AU$327 Return, found 4 days ago
AU$327
Return
found 4 days ago
Select American Airlines flight, departing Tue, 2 Sep. from Washington to Portland, returning Tue, 9 Sep., priced at AU$327 found 4 days ago
United
Tue, 2 Sep. - Tue, 9 Sep.
IAD
Washington
PWM
Portland
AU$335 Return, found 4 days ago
AU$335
Return
found 4 days ago
Select United flight, departing Tue, 2 Sep. from Washington to Portland, returning Tue, 9 Sep., priced at AU$335 found 4 days ago
American Airlines
Tue, 2 Sep. - Tue, 9 Sep.
DCA
Washington
PWM
Portland
AU$337 Return, found 4 days ago
AU$337
Return
found 4 days ago
Select American Airlines flight, departing Tue, 2 Sep. from Washington to Portland, returning Tue, 9 Sep., priced at AU$337 found 4 days ago

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

January is typically the cheapest month to fly

From AU$212 - AU$596 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.