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

Return flights

18 May - 24 May	Avianca
07 May - 10 May	Iberia
11 May - 17 May	Iberia
02 May - 09 May	Avianca
25 May - 31 May	Avianca
11 May - 29 May	Avianca
11 May - 27 May	Avianca
06 May - 22 May	Avianca
02 May - 10 May	Avianca
02 May - 29 May	Avianca
29 May - 03 Jun	Avianca
22 May - 02 Jun	Avianca
22 May - 06 Jun	TAP
25 May - 08 Jun	Air Canada
23 May - 06 Jun	Aer Lingus
20 May - 10 Jun	Lufthansa
20 May - 23 Jun	Lufthansa
26 May - 07 Jun	KLM
27 May - 07 Jun	KLM
25 May - 07 Jun	Air France

Also check the deals for one-way flights from London to Mexico City 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 London to Mexico City in May from 638€

Return flights