AirHint found the following cheapest return flights from Chicago (ORD) to Bangkok (BKK) in May 2026 (see full year).

Return flights

06 May - 20 May	Turkish Airlines
06 May - 14 May	Turkish Airlines
05 May - 12 May	Etihad Airways
04 May - 17 May	Turkish Airlines
02 May - 17 May	Frontier Airlines
12 May - 19 May	Spirit Airlines
01 May - 08 May	Frontier Airlines
09 May - 24 May	Spirit Airlines
17 May - 10 Jun	Frontier Airlines
11 May - 24 May	Turkish Airlines
18 May - 27 May	Spirit Airlines
17 May - 09 Jun	United
22 May - 06 Jun	SWISS
23 May - 22 Jun	Air Canada
22 May - 21 Jun	SWISS
26 May - 16 Jun	SWISS
30 May - 07 Jun	SWISS
29 May - 18 Jun	Cathay Pacific

Also check the deals for one-way flights from Chicago to Bangkok in May.

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 Chicago to Bangkok in May from 652€

Return flights