AirHint found the following cheapest return flights from Montreal (YUL) to London (LGW) in April 2026 (see full year).

Return flights

20 Apr - 30 Apr	TAP
29 Apr - 06 May	Air Transat
05 Apr - 12 Apr	Air Transat
20 Apr - 27 Apr	Air Transat
13 Apr - 20 Apr	TAP
20 Apr - 04 May	Air Transat
01 Apr - 08 Apr	Air Transat
02 Apr - 09 Apr	Air Transat
27 Apr - 04 May	Air Transat
06 Apr - 13 Apr	Air Transat
02 Apr - 11 Apr	Air Transat
02 Apr - 06 Apr	Air Transat
04 Apr - 11 Apr	Air Transat
24 Apr - 01 May	Air Transat
26 Apr - 03 May	TAP
30 Apr - 07 May	Air Transat
28 Apr - 05 May	Air Transat
22 Apr - 16 May	SWISS
29 Apr - 04 May	TAP
25 Apr - 10 May	Air Transat

Also check the deals for one-way flights from Montreal to London in April.

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 Montreal to London in April from $574

Return flights