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

Return flights

05 May - 12 May	Turkish Airlines
07 May - 14 May	Turkish Airlines
08 May - 15 May	Icelandair
12 May - 20 May	Turkish Airlines
06 May - 13 May	Lufthansa
14 May - 21 May	Icelandair
19 May - 26 May	Brussels Airlines
13 May - 21 May	Icelandair
16 May - 23 May	Turkish Airlines
19 May - 28 May	Turkish Airlines
25 May - 02 Jun	Icelandair
28 May - 04 Jun	Icelandair
25 May - 11 Jun	WestJet
27 May - 07 Jun	SWISS
29 May - 12 Jun	Icelandair
27 May - 04 Jun	Brussels Airlines
29 May - 05 Jun	WestJet
30 May - 05 Jun	Icelandair
26 May - 10 Jun	Air Canada

Also check the deals for one-way flights from Denver 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 Denver to Athens in May from 523€

Return flights