AirHint found the following cheapest return flights from Chicago (MDW) to Algier (ALG) in September 2025 (see full year).

Return flights

15 Sep - 30 Sep	Air France
16 Sep - 30 Sep	Air France
11 Sep - 18 Sep	Frontier Airlines
18 Sep - 30 Sep	Porter Airlines (Canada) Ltd
08 Sep - 14 Sep	Air France
18 Sep - 01 Oct	Air France
17 Sep - 30 Sep	Air France
20 Sep - 04 Oct	Air France
19 Sep - 03 Oct	KLM
13 Sep - 27 Sep	Air France
11 Sep - 15 Oct	Air France
12 Sep - 15 Oct	Air France

Also check the deals for one-way flights from Chicago to Algier in September.

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 Algier in September from 681€

Return flights