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

Return flights

01 Mar - 06 Mar	Air Transat
01 Mar - 08 Mar	Air Transat
02 Mar - 09 Mar	Air Transat
03 Mar - 10 Mar	Air Transat
04 Mar - 11 Mar	Air Transat
05 Mar - 15 Mar	Air Transat
02 Mar - 13 Mar	Air Transat
01 Mar - 11 Mar	Air Transat
06 Mar - 11 Mar	Air Transat
02 Mar - 07 Mar	Air Transat
28 Mar - 06 Apr	Air Transat
17 Mar - 07 Apr	Porter Airlines (Canada) Ltd
18 Mar - 08 Apr	Air Transat
20 Mar - 06 Apr	Air Transat
11 Mar - 04 Apr	Porter Airlines (Canada) Ltd
27 Mar - 03 Apr	Air Transat

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 473€

Return flights