AirHint found the following cheapest return flights from London (LHR) to Mexico City (MEX) in October 2025 (see full year).

Return flights

06 Oct - 13 Oct	Air Canada
06 Oct - 18 Oct	Air Canada
06 Oct - 27 Nov	Air Canada
04 Oct - 19 Oct	Air Canada
03 Oct - 19 Oct	Air Canada
01 Oct - 17 Oct	Air Canada
04 Oct - 11 Oct	Air Canada
07 Oct - 21 Oct	Air Canada
02 Oct - 23 Oct	Air Canada
04 Oct - 13 Oct	Air Canada
02 Oct - 09 Oct	Air Canada
31 Oct - 09 Nov	Air Canada
21 Oct - 12 Nov	Air Canada
31 Oct - 07 Nov	Air Canada
28 Oct - 08 Nov	United
28 Oct - 04 Nov	United
28 Oct - 11 Nov	United
30 Oct - 12 Nov	United
30 Oct - 15 Nov	United
30 Oct - 22 Nov	United

Also check the deals for one-way flights from London to Mexico City in October.

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 London to Mexico City in October from $773

Return flights