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

Return flights

29 Jan - 13 Feb	Qatar Airways
27 Jan - 12 Feb	Qatar Airways
30 Jan - 06 Feb	Delta
12 Jan - 19 Jan	Qatar Airways
16 Jan - 19 Jan	United
03 Jan - 10 Jan	Frontier Airlines
02 Jan - 09 Jan	Frontier Airlines

Also check the deals for one-way flights from Philadelphia 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 Philadelphia to Bangkok in January from 751€

Return flights