Cheapest return flights from Portland (PDX) to Bangkok (BKK), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
03 Sep 17 Sep Frontier Airlines
01 Sep 29 Sep Alaska Airlines
03 Sep 10 Sep Frontier Airlines
02 Sep 09 Sep Alaska Airlines
13 Sep 21 Sep Frontier Airlines
16 Sep 16 Oct Frontier Airlines
25 Sep 26 Oct Frontier Airlines
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deals for one-way flights from Portland to Bangkok in September.

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Updated Jul 15, 2026.

About these fares

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