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

Return flights

18 Sep - 25 Sep	Delta
10 Sep - 18 Sep	Delta
10 Sep - 24 Sep	Delta
30 Sep - 19 Oct	Korean Air
22 Sep - 28 Sep	Korean Air
10 Sep - 22 Sep	Korean Air
16 Sep - 14 Oct	Korean Air
21 Sep - 13 Oct	Korean Air
22 Sep - 29 Sep	Korean Air
23 Sep - 29 Sep	Korean Air
25 Sep - 23 Oct	Delta
25 Sep - 15 Oct	Delta
10 Sep - 17 Sep	Air Canada
16 Sep - 30 Sep	Korean Air
14 Sep - 23 Sep	Delta
20 Sep - 01 Oct	Delta
30 Sep - 27 Oct	Delta
26 Sep - 27 Oct	Korean Air
09 Sep - 01 Oct	Korean Air
20 Sep - 07 Oct	Korean Air

Also check the deals for one-way flights from New York 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.

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Cheapest return flights from New York to Bangkok in September from $753

Return flights