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

Return flights

18 May - 01 Jun	WestJet
18 May - 11 Jun	WestJet
05 May - 14 May	WestJet
04 May - 09 Jun	WestJet
20 May - 27 May	WestJet
12 May - 26 May	WestJet
06 May - 19 May	WestJet
07 May - 18 May	Cathay Pacific
05 May - 12 May	WestJet
12 May - 19 May	WestJet
16 May - 24 May	WestJet
07 May - 24 May	WestJet
02 May - 18 May	WestJet
27 May - 10 Jun	Cathay Pacific
26 May - 09 Jun	Cathay Pacific
27 May - 16 Jun	Cathay Pacific
18 May - 13 Jun	China Airlines
23 May - 06 Jun	Cathay Pacific
26 May - 11 Jun	Cathay Pacific
26 May - 05 Jun	Cathay Pacific

Also check the deals for one-way flights from Calgary 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 Calgary to Bangkok in May from $781

Return flights