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.

$310 CHEAP FLIGHTS from Illinois 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

Thu, Sep 24 - Sun, Oct 4

8:10 pm - 8:45 am

ORD

SOF

28h 35m

1 stop

9:10 pm - 9:40 am

SOF

ORD

20h 30m

1 stop

$767Turkish Airlines

Fri, Sep 25 - Sun, Oct 4

11:25 am - 3:00 pm

ORD

SOF

19h 35m

1 stop

1:05 pm - 9:40 am

SOF

ORD

28h 35m

1 stop

$767Turkish Airlines

Thu, Sep 3 - Thu, Sep 24

9:50 pm - 1:55 pm

ORD

SOF

32h 05m

1 stop

6:45 pm - 7:50 pm

SOF

ORD

33h 05m

1 stop

$768LOT

Sun, Sep 6 - Tue, Sep 22

9:50 pm - 6:00 pm

ORD

SOF

12h 10m

1 stop

6:45 pm - 7:50 pm

SOF

ORD

33h 05m

1 stop

$768LOT

Thu, Oct 29 - Thu, Nov 12

1:55 pm - 1:25 pm

ORD

SOF

16h 30m

2 stops

6:25 am - 2:52 pm

SOF

ORD

16h 27m

2 stops

$768Multiple Airlines

Fri, Jan 8 - Fri, Jan 22

7:05 am - 1:25 pm

ORD

SOF

22h 20m

2 stops

6:25 am - 2:52 pm

SOF

ORD

16h 27m

2 stops

$768Multiple Airlines

Wed, Jan 27 - Sun, Jan 31

6:00 pm - 1:15 pm

ORD

SOF

11h 15m

1 stop

6:25 am - 3:20 pm

SOF

ORD

16h 55m

1 stop

$773United Airlines

Sat, Dec 5 - Fri, Dec 25

6:00 pm - 1:15 pm

ORD

SOF

11h 15m

1 stop

2:10 pm - 8:05 pm

SOF

ORD

13h 55m

1 stop

$773United Airlines

Tue, Jan 12 - Sun, Jan 24

9:50 pm - 6:20 pm

ORD

SOF

12h 30m

1 stop

6:25 am - 1:10 pm

SOF

ORD

14h 45m

1 stop

$773Lufthansa

Sun, Jan 10 - Sun, Jan 24

9:50 pm - 6:20 pm

ORD

SOF

12h 30m

1 stop

6:25 am - 1:10 pm

SOF

ORD

14h 45m

1 stop

$773Lufthansa

Useful Info

Low season	November
High season	July
Cheapest flight	$310

Best time to beat the crowds with an average 12% drop in price.

Most popular time to fly with an average 30% 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

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Sofia (SOF)

SOF

$310 Find Cheap Flights from Illinois to Sofia - Compare and Save

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

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FAQs for booking flights from Illinois to Sofia

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

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Choose which airport to fly into in Sofia

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