AirHint found the following cheapest return flights from Ottawa (YOW) to London (LGW) in March 2026 (see full year).

Return flights

12 Mar - 17 Mar	Air Transat
13 Mar - 05 Apr	Air Transat
08 Mar - 28 Mar	Air Canada
13 Mar - 04 Apr	Porter Airlines (Canada) Ltd
18 Mar - 27 Mar	Air Transat
20 Mar - 29 Mar	Air France

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

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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Cheapest return flights from Ottawa to London in March from $814

Return flights