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

Return flights

27 Jul - 22 Aug	British Airways
22 Jul - 15 Aug	British Airways
13 Jul - 13 Aug	British Airways
15 Jul - 23 Jul	British Airways
26 Jul - 02 Aug	British Airways
02 Jul - 16 Jul	British Airways
19 Jul - 26 Jul	British Airways
06 Jul - 01 Aug	British Airways
13 Jul - 25 Jul	British Airways
10 Jul - 26 Jul	British Airways
01 Jul - 25 Jul	British Airways
01 Jul - 11 Jul	British Airways

Also check the deals for one-way flights from Ontario 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Ontario to London in July from 1151€

Return flights