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

Return flights

08 Dec - 15 Dec	WestJet
28 Dec - 28 Jan	Porter Airlines (Canada) Ltd
27 Dec - 10 Jan	Porter Airlines (Canada) Ltd
07 Dec - 26 Dec	Air France
16 Dec - 07 Jan	WestJet
16 Dec - 01 Jan	WestJet
18 Dec - 01 Jan	WestJet
17 Dec - 01 Jan	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Ottawa 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 Ottawa to Bangkok in December from 995€

Return flights