Cheap flights from Houston to Great Diamond Island

View AU$198 flight on Wed, 15 Oct. 2025Opens in a new window

Popular airlines from Houston to Great Diamond Island

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Cheap Flights from Houston (HOU) 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.

Delta
Wed, 27 Aug. - Sun, 31 Aug.
IAH
Houston
PWM
Portland
AU$523 Return, found 3 days ago
AU$523
Return
found 3 days ago
Select Delta flight, departing Wed, 27 Aug. from Houston to Portland, returning Sun, 31 Aug., priced at AU$523 found 3 days ago
American Airlines
Wed, 27 Aug. - Sun, 31 Aug.
IAH
Houston
PWM
Portland
AU$570 Return, found 3 days ago
AU$570
Return
found 3 days ago
Select American Airlines flight, departing Wed, 27 Aug. from Houston to Portland, returning Sun, 31 Aug., priced at AU$570 found 3 days ago
American Airlines
Wed, 27 Aug. - Sun, 31 Aug.
IAH
Houston
PWM
Portland
AU$607 Return, found 3 days ago
AU$607
Return
found 3 days ago
Select American Airlines flight, departing Wed, 27 Aug. from Houston to Portland, returning Sun, 31 Aug., priced at AU$607 found 3 days ago
United
Wed, 27 Aug. - Sun, 31 Aug.
IAH
Houston
PWM
Portland
AU$631 Return, found 3 days ago
AU$631
Return
found 3 days ago
Select United flight, departing Wed, 27 Aug. from Houston to Portland, returning Sun, 31 Aug., priced at AU$631 found 3 days ago
American Airlines
Wed, 27 Aug. - Sun, 31 Aug.
IAH
Houston
PWM
Portland
AU$632 Return, found 3 days ago
AU$632
Return
found 3 days ago
Select American Airlines flight, departing Wed, 27 Aug. from Houston to Portland, returning Sun, 31 Aug., priced at AU$632 found 3 days ago
Delta
Wed, 27 Aug. - Sun, 31 Aug.
IAH
Houston
PWM
Portland
AU$662 Return, found 3 days ago
AU$662
Return
found 3 days ago
Select Delta flight, departing Wed, 27 Aug. from Houston to Portland, returning Sun, 31 Aug., priced at AU$662 found 3 days ago

Find the cheapest month to fly from Houston (HOU) to Portland (PWM)

September is typically the cheapest month to fly

From AU$271 - AU$579 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.