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

Return flights

31 Oct - 30 Nov	Air Canada
31 Oct - 05 Nov	Air Canada
31 Oct - 14 Nov	Air Canada
31 Oct - 12 Nov	Air Canada
27 Oct - 17 Nov	British Airways
30 Oct - 05 Nov	British Airways
28 Oct - 05 Nov	United
28 Oct - 07 Nov	United
28 Oct - 10 Nov	United
28 Oct - 08 Nov	United
17 Oct - 23 Oct	United
20 Oct - 26 Oct	United
20 Oct - 30 Oct	United
20 Oct - 27 Oct	United
21 Oct - 28 Oct	United
20 Oct - 29 Oct	United
22 Oct - 26 Oct	United
24 Oct - 29 Oct	United
23 Oct - 26 Oct	United
23 Oct - 30 Oct	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 $838

Return flights