Cheapest one-way flights from Ottawa to London in September from $328

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

One-Way flights

22 Sep WestJet
17 Sep WestJet
16 Sep Porter Airlines (Canada) Ltd
14 Sep Porter Airlines (Canada) Ltd
27 Sep WestJet
08 Sep Porter Airlines (Canada) Ltd
10 Sep WestJet
21 Sep WestJet
11 Sep Porter Airlines (Canada) Ltd
13 Sep Porter Airlines (Canada) Ltd

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

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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