AirHint found the following cheapest return flights from Chicago (MDW) to Amsterdam (AMS) in October 2025 (see full year).

Return flights

10 Oct - 19 Oct	Frontier Airlines
03 Oct - 08 Oct	Frontier Airlines
03 Oct - 06 Oct	Frontier Airlines
19 Oct - 04 Nov	Air France
26 Oct - 04 Nov	Air France
04 Oct - 10 Oct	Porter Airlines (Canada) Ltd
04 Oct - 06 Oct	Frontier Airlines
11 Oct - 19 Oct	Porter Airlines (Canada) Ltd
29 Oct - 22 Nov	KLM
15 Oct - 19 Oct	Porter Airlines (Canada) Ltd
03 Oct - 25 Oct	Porter Airlines (Canada) Ltd
12 Oct - 22 Oct	Air France
05 Oct - 09 Oct	Frontier Airlines

Also check the deals for one-way flights from Chicago to Amsterdam 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 Chicago to Amsterdam in October from $727

Return flights