AirHint found the following cheapest return flights from Mexico City (MEX) to Lisbon (LIS) in May 2026 (see full year).

Return flights

07 May - 20 May	Aeromexico
21 May - 28 May	Air Canada
05 May - 19 May	Air Canada
05 May - 20 May	Aeromexico
07 May - 18 May	Aeromexico
07 May - 19 May	Air Canada
14 May - 27 May	Aeromexico
08 May - 20 May	Aeromexico
11 May - 24 May	Aeromexico
06 May - 17 May	Aeromexico
18 May - 03 Jun	Iberia
12 May - 02 Jun	Iberia
28 May - 20 Jun	Air Canada
26 May - 10 Jun	Aeromexico
29 May - 14 Jun	Iberia

Also check the deals for one-way flights from Mexico City to Lisbon in May.

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 Mexico City to Lisbon in May from $734

Return flights