Cheapest return flights from Ottawa to London in August from $680

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

Return flights

20 Aug - 27 Aug Porter Airlines (Canada) Ltd
13 Aug - 21 Aug Air Transat
13 Aug - 27 Aug Air Transat
11 Aug - 03 Sep Air Transat
12 Aug - 19 Aug Air Transat
13 Aug - 20 Aug Air Transat
10 Aug - 19 Aug Air Transat
03 Aug - 18 Aug Air Transat
15 Aug - 30 Aug Air Transat
27 Aug - 04 Sep Porter Airlines (Canada) Ltd
04 Aug - 11 Aug Air Transat
27 Aug - 09 Sep Porter Airlines (Canada) Ltd
11 Aug - 18 Aug Air Transat
28 Aug - 05 Sep Porter Airlines (Canada) Ltd
28 Aug - 06 Sep Porter Airlines (Canada) Ltd
27 Aug - 06 Sep Air Transat
30 Aug - 07 Sep Air Transat
28 Aug - 07 Sep Air Transat

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

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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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