Cheapest return flights from Ottawa to London in December from $674

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

Return flights

05 Dec - 08 Dec Aer Lingus
05 Dec - 18 Jan WestJet
02 Dec - 06 Dec Air Canada
29 Dec - 24 Jan Air Canada
23 Dec - 17 Jan Air Canada
22 Dec - 17 Jan Air Canada
13 Dec - 27 Dec Air Canada
15 Dec - 09 Jan WestJet
16 Dec - 10 Jan Porter Airlines (Canada) Ltd
21 Dec - 10 Jan Air Canada
20 Dec - 10 Jan Porter Airlines (Canada) Ltd
18 Dec - 10 Jan Porter Airlines (Canada) Ltd
25 Dec - 02 Jan WestJet
21 Dec - 30 Dec Air Canada
23 Dec - 30 Dec Virgin Atlantic

Also check the deals for one-way flights from Ottawa to London in December.

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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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