How does KAYAK find such low prices on flights from Illinois to Sofia?

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 Sofia. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Sofia?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to Sofia?

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 to Sofia with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Sofia?

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 to Sofia from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$279 CHEAP FLIGHTS from Illinois to Sofia

SOF

KAYAK searches hundreds of travel sites at once for deals on flights to Sofia

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Flight Deals

Cheap Flights from Illinois to Sofia

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Illinois to Sofia

Wed, Aug 26 - Wed, Sep 9

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$567Turkish Airlines

Mon, Aug 24 - Fri, Sep 25

11:25 am - 8:45 am

ORD

SOF

13h 20m

1 stop

9:35 am - 6:15 pm

SOF

ORD

16h 40m

1 stop

$571Turkish Airlines

Sun, Sep 6 - Tue, Sep 22

8:10 pm - 8:45 am

ORD

SOF

28h 35m

1 stop

9:35 am - 6:15 pm

SOF

ORD

16h 40m

1 stop

$572Turkish Airlines

Wed, Apr 15 - Wed, Apr 29

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$573Turkish Airlines

Wed, Aug 26 - Tue, Sep 15

4:40 pm - 3:00 am

ORD

SOF

26h 20m

1 stop

4:05 pm - 2:30 pm

SOF

ORD

30h 25m

1 stop

$598Air Serbia

Sun, Apr 26 - Sun, May 3

6:55 pm - 6:40 pm

STL

SOF

15h 45m

2 stops

6:20 am - 1:25 pm

SOF

STL

15h 05m

1 stop

$690Lufthansa

Wed, Apr 29 - Wed, May 6

1:46 pm - 2:00 pm

STL

SOF

16h 14m

2 stops

7:00 am - 8:44 pm

SOF

STL

21h 44m

2 stops

$695KLM

Wed, Apr 29 - Wed, May 6

9:10 am - 6:05 pm

STL

SOF

24h 55m

2 stops

6:20 am - 1:25 pm

SOF

STL

15h 05m

1 stop

$703Lufthansa

Sun, Apr 26 - Sun, May 3

4:05 pm - 6:40 pm

STL

SOF

18h 35m

2 stops

6:20 am - 8:25 pm

SOF

STL

22h 05m

2 stops

$729Air Canada

Wed, Apr 8 - Thu, Apr 30

1:10 pm - 2:00 pm

MDW

SOF

16h 50m

2 stops

7:00 am - 10:28 pm

SOF

MDW

23h 28m

2 stops

$818KLM

Useful Info

Low season	January
High season	July
Cheapest flight	$279

Best time to beat the crowds with an average 28% drop in price.

Most popular time to fly with an average 9% increase in price.

Flight from Chicago O'Hare Airport to Sofia

How does KAYAK find such low prices on flights from Illinois to Sofia?
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 Sofia.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Sofia?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to Sofia?
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 to Sofia with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Sofia?
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 to Sofia from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Velingrad

Sandanski

Everything you need to know for your flight to Sofia

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Sofia

Sofia (SOF)

SOF

$279 Find Cheap Flights from Illinois to Sofia

KAYAK searches hundreds of travel sites at once for deals on flights to Sofia

Cheap Flights from Illinois to Sofia

Recent round-trip flight deals from Illinois to Sofia

Recent one-way flight deals from Illinois to Sofia

Recent last minute flight deals from Illinois to Sofia

Good to know

FAQs for booking flights from Illinois to Sofia

How does KAYAK find such low prices on flights from Illinois to Sofia?

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 Sofia.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Sofia?

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

What is the Hacker Fare option on flights from Illinois to Sofia?

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 to Sofia with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Sofia?

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 to Sofia from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Sofia?

Everything you need to know for your flight to Sofia

Information on the airport you'll fly into in Sofia

Cabin class types available on flights to Illinois

Complete your trip to Sofia with a hotel stay or car rental

Find direct flights for Sofia

Flights to other popular destinations

Flights from domestic origins to Sofia

Choose which airport to fly into in Sofia

Find deals for your return flight