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

Return flights

11 Aug - 22 Aug	Frontier Airlines
17 Aug - 29 Aug	Air France
19 Aug - 26 Aug	KLM
26 Aug - 02 Sep	KLM
12 Aug - 22 Aug	Delta
10 Aug - 22 Aug	Delta
25 Aug - 04 Sep	Air France
18 Aug - 25 Aug	KLM
23 Aug - 04 Sep	KLM
24 Aug - 31 Aug	KLM
23 Aug - 30 Aug	Porter Airlines (Canada) Ltd
09 Aug - 17 Aug	Delta
28 Aug - 15 Sep	KLM
28 Aug - 14 Sep	KLM
22 Aug - 29 Aug	KLM
29 Aug - 16 Sep	Virgin Atlantic
29 Aug - 15 Sep	Virgin Atlantic
29 Aug - 02 Sep	Delta

Also check the deals for one-way flights from Chicago to Amsterdam in August.

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 August from 590€

Return flights