Cheapest return ORD–IST flights, May

AirHint found the following cheapest return flights from Chicago (ORD) to Istanbul (IST) in May 2026 (see full year).

Return flights

13 May - 11 Jun SWISS
24 May - 29 May KLM
12 May - 19 May LOT
11 May - 21 May LOT
29 May - 12 Jun KLM
22 May - 07 Jun Icelandair
13 May - 20 May SWISS
25 May - 17 Jun Air France
31 May - 06 Jun jetBlue
11 May - 18 May SWISS
20 May - 30 May LOT
19 May - 28 May LOT
15 May - 11 Jun LOT
14 May - 25 May SWISS
18 May - 26 May SWISS
17 May - 23 May LOT
23 May - 01 Jun KLM
23 May - 06 Jun KLM
13 May - 12 Jun SWISS
27 May - 27 Jun Icelandair

Also check the deals for one-way flights from Chicago to Istanbul in May.

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