AirHint found the following cheapest return flights from Oakland (OAK) to Bangkok (BKK) in September 2025 (see full year).

Return flights

30 Sep - 16 Oct	Korean Air
29 Sep - 16 Oct	Korean Air
29 Sep - 06 Oct	Korean Air
24 Sep - 21 Oct	Korean Air
23 Sep - 30 Sep	Alaska Airlines
22 Sep - 29 Sep	Alaska Airlines
23 Sep - 07 Oct	EVA Air
27 Sep - 07 Oct	EVA Air
22 Sep - 20 Oct	EVA Air
20 Sep - 25 Sep	EVA Air
26 Sep - 29 Sep	EVA Air
25 Sep - 07 Oct	EVA Air
20 Sep - 28 Sep	China Airlines
21 Sep - 28 Sep	China Airlines
19 Sep - 30 Sep	EVA Air
25 Sep - 29 Sep	Qatar Airways
28 Sep - 05 Oct	Qatar Airways
27 Sep - 05 Oct	Qatar Airways
20 Sep - 27 Sep	Qatar Airways
28 Sep - 30 Sep	Qatar Airways

Also check the deals for one-way flights from Oakland to Bangkok in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from Oakland to Bangkok in September from $765

Return flights