$297 Find Cheap Flights from Illinois to Bulgaria - Compare and Save

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Bulgaria.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to Bulgaria is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Illinois to Bulgaria with an airline and back with another airline.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Illinois to Bulgaria up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

There are 4 airports in Bulgaria. The busiest airport is Sofia Airport (SOF), with 77% of all flights arriving there.

The cheapest month for flights from Illinois to Bulgaria is February, when tickets cost $375 (return) on average. On the other hand, the most expensive months are June and May, when the average cost of round-trip tickets is $965 and $853 respectively.

To get a below average price on the flight from Illinois to Bulgaria, you should book around 5 weeks before departure, which saves you about 4% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

An average nonstop flight from Illinois to Bulgaria takes 17h 27m, covering a distance of 5301 miles. The shortest route is Chicago O'Hare Intl Airport (ORD) to Sofia (SOF) with an average flight time of 12h 00m.