AirHint found the following cheapest return flights from Boston (BOS) to Bangkok (BKK) in January 2026 (see full year).

Return flights

28 Jan - 04 Feb	Korean Air
20 Jan - 04 Feb	Korean Air
18 Jan - 15 Feb	Hainan Airlines
18 Jan - 01 Feb	Hainan Airlines
25 Jan - 01 Feb	Hainan Airlines
28 Jan - 19 Feb	Korean Air
20 Jan - 19 Feb	Korean Air
19 Jan - 26 Jan	Delta
17 Jan - 26 Jan	Cathay Pacific
07 Jan - 21 Jan	Hainan Airlines
09 Jan - 23 Jan	Hainan Airlines
07 Jan - 28 Jan	Hainan Airlines
20 Jan - 22 Feb	Delta
20 Jan - 24 Jan	Delta
09 Jan - 24 Jan	Hainan Airlines
13 Jan - 26 Jan	Etihad Airways
11 Jan - 24 Jan	Hainan Airlines
09 Jan - 22 Jan	Hainan Airlines
06 Jan - 08 Feb	Etihad Airways
05 Jan - 11 Feb	Qatar Airways

Also check the deals for one-way flights from Boston to Bangkok in January.

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 Boston to Bangkok in January from $692

Return flights