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

Return flights

22 Oct - 10 Nov	Ryanair
29 Oct - 11 Nov	Ryanair
29 Oct - 12 Nov	Ryanair
08 Oct - 22 Oct	United
16 Oct - 28 Oct	United
16 Oct - 20 Oct	United
03 Oct - 07 Oct	Air Canada
22 Oct - 28 Oct	Ryanair
29 Oct - 06 Nov	Ryanair
04 Oct - 11 Oct	Air Canada
29 Oct - 05 Nov	Ryanair
15 Oct - 07 Nov	United
08 Oct - 15 Oct	easyJet
10 Oct - 21 Oct	Ryanair
22 Oct - 07 Nov	Ryanair
31 Oct - 19 Nov	TAP
04 Oct - 15 Oct	Air Canada
15 Oct - 05 Nov	United
01 Oct - 08 Oct	Vueling Airlines
23 Oct - 12 Nov	United

Also check the deals for one-way flights from Lisbon 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 Lisbon to Mexico City in October from $817

Return flights