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

Return flights

10 Jul - 21 Jul	WestJet
31 Jul - 11 Aug	WestJet
24 Jul - 28 Jul	WestJet
24 Jul - 28 Jul	Air Transat	direct
31 Jul - 11 Aug	Air Transat	direct
31 Jul - 09 Aug	Air Transat	direct
31 Jul - 07 Aug	Air Transat	direct
09 Jul - 31 Jul	Air Transat
10 Jul - 21 Jul	Air Transat	direct
13 Jul - 27 Jul	WestJet
31 Jul - 10 Aug	WestJet
17 Jul - 27 Jul	Porter Airlines (Canada) Ltd
31 Jul - 08 Aug	WestJet
09 Jul - 20 Jul	Air Transat

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

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 July from 583€

Return flights