Cheapest one-way flights from Ottawa to London in May from $315

Best time to book flights for Ottawa (YOW) to London (LHR) flights at AirHint

AirHint found the following cheapest one-way flights from Ottawa (YOW) to London (LHR) in May 2025 (see full year).

One-Way flights

28 May WestJet
31 May WestJet
27 May Porter Airlines (Canada) Ltd
26 May Porter Airlines (Canada) Ltd
25 May WestJet
19 May WestJet
24 May Porter Airlines (Canada) Ltd
30 May Porter Airlines (Canada) Ltd
29 May Porter Airlines (Canada) Ltd
11 May Porter Airlines (Canada) Ltd

Also check the deals for return flights from Ottawa to London in May.

Skyscanner

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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