AirHint found the following cheapest return flights from Montreal (YUL) to Athens (ATH) in May 2026 (see full year).

Return flights

05 May - 12 May	Air France
05 May - 26 May	Air France
04 May - 22 May	Air France
05 May - 22 May	Air France
04 May - 14 May	Air France
11 May - 29 May	Delta
19 May - 27 May	KLM
19 May - 26 May	KLM
05 May - 19 May	Air Transat
06 May - 19 May	Air Transat
22 May - 08 Jun	Air Transat
22 May - 10 Jun	Air Transat
22 May - 11 Jun	Air Transat
29 May - 05 Jun	Air Transat
27 May - 03 Jun	Air Transat
24 May - 15 Jun	Air Transat
30 May - 06 Jun	FrenchBee
27 May - 10 Jun	Air Transat
27 May - 13 Jun	Air Transat
26 May - 02 Jun	Air Transat

Also check the deals for one-way flights from Montreal to Athens 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 Montreal to Athens in May from $594

Return flights