AirHint found the following cheapest return flights from Waterloo (YKF) to Bangkok (BKK) in September 2025 (see full year).

Return flights

30 Sep - 24 Oct	WestJet
11 Sep - 25 Sep	WestJet
15 Sep - 15 Oct	WestJet
18 Sep - 15 Oct	WestJet
22 Sep - 26 Sep	WestJet
22 Sep - 03 Oct	WestJet
08 Sep - 22 Sep	WestJet
08 Sep - 15 Sep	WestJet
20 Sep - 27 Sep	WestJet
16 Sep - 15 Oct	WestJet
16 Sep - 22 Sep	WestJet
15 Sep - 21 Sep	WestJet
18 Sep - 21 Sep	WestJet
12 Sep - 08 Oct	WestJet
29 Sep - 24 Oct	WestJet
16 Sep - 21 Sep	WestJet

Also check the deals for one-way flights from Waterloo to Bangkok in September.

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 Waterloo to Bangkok in September from $2090

Return flights