AirHint found the following cheapest return flights from Edmonton (YEG) to Chicago (ORD) in September 2025 (see full year).

Return flights

29 Sep - 06 Oct	WestJet
23 Sep - 25 Sep	WestJet
29 Sep - 11 Oct	WestJet
06 Sep - 13 Sep	WestJet	direct
20 Sep - 24 Sep	United
24 Sep - 27 Sep	United
25 Sep - 28 Sep	WestJet
07 Sep - 13 Sep	WestJet
14 Sep - 20 Sep	WestJet
04 Sep - 07 Sep	United
16 Sep - 22 Sep	WestJet
20 Sep - 24 Sep	Air Canada	direct

Also check the deals for one-way flights from Edmonton to Chicago 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 Edmonton to Chicago in September from 125€

Return flights