Fly from Chicago to Sofia for $599 round-trip on LOT Polish Airlines.
Seen below, we found seats departing ORD on Wednesday, April 18, returning from SOF on April 22. Flights connect via Warsaw WAW.
Other dates are also available for travel from late August through March.
See our fare details for booking info.
Need a room in Sofia? Here's what's available for the above dates on Hotelwatchdog.