AirHint found the following cheapest return flights from St. Louis (STL) to Athens (ATH) in October 2025 (see full year).

Return flights

30 Oct - 06 Nov	Delta
16 Oct - 08 Nov	Air Canada
06 Oct - 01 Nov	Frontier Airlines
10 Oct - 01 Nov	Frontier Airlines
09 Oct - 01 Nov	Spirit Airlines
07 Oct - 01 Nov	Frontier Airlines
04 Oct - 25 Oct	Frontier Airlines
08 Oct - 01 Nov	Frontier Airlines

Also check the deals for one-way flights from St. Louis to Athens 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 St. Louis to Athens in October from 542€

Return flights