AirHint found the following cheapest return flights from Newark (EWR) to Bangkok (BKK) in December 2025 (see full year).

Return flights

03 Dec - 10 Dec	United
04 Dec - 11 Dec	United
05 Dec - 08 Dec	United
09 Dec - 16 Dec	Turkish Airlines
01 Dec - 30 Jan	Delta
27 Dec - 01 Jan	Air India
01 Dec - 01 Jan	Ethiopian Airlines
01 Dec - 31 Jan	Delta
06 Dec - 25 Jan	United
11 Dec - 21 Dec	United
22 Dec - 08 Jan	Air India
11 Dec - 12 Jan	ANA
02 Dec - 10 Dec	SWISS
13 Dec - 27 Dec	United
11 Dec - 29 Dec	Air India
22 Dec - 30 Dec	Air India
10 Dec - 30 Dec	United
19 Dec - 01 Jan	Ethiopian Airlines
26 Dec - 02 Jan	Air India
28 Dec - 16 Jan	Delta

Also check the deals for one-way flights from Newark to Bangkok in December.

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 Newark to Bangkok in December from 640€

Return flights