Cheapest return flights from Chicago to Sofia in October from 489€

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

Return flights

15 Oct - 22 Oct Lufthansa
29 Oct - 12 Nov SWISS
05 Oct - 12 Oct United
02 Oct - 16 Oct Lufthansa
06 Oct - 18 Oct United
10 Oct - 17 Oct United
20 Oct - 27 Oct United
30 Oct - 06 Nov United
25 Oct - 01 Nov United

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

Skyscanner

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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