Cheapest one-way flights from Ottawa to London in September from $294

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

One-Way flights

16 Sep WestJet
27 Sep Porter Airlines (Canada) Ltd
18 Sep WestJet
12 Sep Porter Airlines (Canada) Ltd
14 Sep Air Canada
19 Sep Air Canada
13 Sep WestJet
01 Sep Porter Airlines (Canada) Ltd
04 Sep Air Transat

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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