Cheapest return flights from Chicago to Sofia in May from $669

Best time to book flights for Chicago (ORD) to Sofia (SOF) flights at AirHint

AirHint found the following cheapest return flights from Chicago (ORD) to Sofia (SOF) in May 2025 (see full year).

Return flights

12 May - 26 May Air Canada
11 May - 24 May SWISS
28 May - 30 May Spirit Airlines
17 May - 31 May Air Canada
26 May - 30 May Icelandair
20 May - 15 Jun Spirit Airlines
31 May - 14 Jun Spirit Airlines
30 May - 07 Jun Spirit Airlines
20 May - 22 Jun Spirit Airlines
18 May - 24 Jun Spirit Airlines
19 May - 24 Jun Air Canada
20 May - 27 Jun Air Canada
15 May - 28 Jun LOT
16 May - 28 Jun Air Canada
31 May - 07 Jun United

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

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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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