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

Return flights

01 Dec - 08 Dec	United
05 Dec - 14 Dec	United
09 Dec - 25 Dec	Turkish Airlines
29 Dec - 11 Jan	Air India
11 Dec - 12 Jan	ANA
05 Dec - 12 Dec	Delta
30 Dec - 13 Jan	Air India
18 Dec - 29 Dec	Air India
02 Dec - 12 Dec	SWISS
02 Dec - 10 Dec	SWISS
12 Dec - 12 Jan	United
18 Dec - 30 Dec	Air India
23 Dec - 06 Jan	Air India
25 Dec - 05 Jan	Air India
01 Dec - 13 Dec	SWISS
24 Dec - 02 Jan	Ethiopian Airlines
19 Dec - 01 Jan	Ethiopian Airlines
12 Dec - 30 Dec	British Airways
19 Dec - 02 Jan	Ethiopian Airlines
25 Dec - 10 Jan	British Airways

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 636€

Return flights