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>

$307 CHEAP FLIGHTS from Illinois to Sofia

SOF

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

...and more

Travelers love KAYAK

41.299.237 searches in the past 7 days on KAYAK

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$517

Typical prices: $674-$986

Turkish Airlines

Fr 4/17Fr 5/8

ORD - SOF • 1 stop

Cheapest one-way

$307

Typical prices: $458-$489

Multiple Airlines

So 3/15

ORD - SOF • 3 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Sofia!

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

Fr, Apr 17 - Fr, Mai 8

8:10 pm - 3:00 pm

ORD

SOF

34h 50m

1 stop

9:35 am - 9:40 am

SOF

ORD

32h 05m

1 stop

$517Turkish Airlines

Fr, Apr 24 - Sa, Mai 30

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

9:05 pm - 9:40 am

SOF

ORD

20h 35m

1 stop

$521Turkish Airlines

Do, Feb 26 - Mo, Mrz 2

6:00 am - 10:45 pm

STL

SOF

32h 45m

2 stops

2:20 pm - 11:59 pm

SOF

STL

17h 39m

2 stops

$548United Airlines

So, Mrz 1 - Sa, Mrz 7

6:55 pm - 6:20 pm

STL

SOF

15h 25m

2 stops

2:25 pm - 1:55 pm

SOF

STL

31h 30m

1 stop

$552Lufthansa

So, Mrz 1 - Sa, Mrz 7

3:50 pm - 1:35 pm

STL

SOF

13h 45m

1 stop

2:25 pm - 1:55 pm

SOF

STL

31h 30m

1 stop

$565Lufthansa

Di, Mai 5 - Do, Mai 21

7:30 am - 10:50 pm

STL

SOF

31h 20m

2 stops

6:30 am - 8:05 pm

SOF

STL

21h 35m

2 stops

$612Multiple Airlines

Di, Mai 5 - Do, Mai 21

7:30 am - 12:10 pm

STL

SOF

20h 40m

2 stops

11:30 am - 1:25 pm

SOF

STL

33h 55m

1 stop

$614Multiple Airlines

Mi, Mai 6 - Do, Mai 14

10:00 am - 6:40 pm

STL

SOF

24h 40m

2 stops

6:30 am - 8:05 pm

SOF

STL

21h 35m

2 stops

$615United Airlines

Mi, Mrz 18 - Mi, Mrz 25

2:05 pm - 2:05 pm

MDW

SOF

17h 00m

2 stops

7:00 am - 5:54 pm

SOF

MDW

17h 54m

2 stops

$717KLM

Mi, Apr 1 - So, Apr 12

1:10 pm - 2:00 pm

MDW

SOF

16h 50m

2 stops

7:00 am - 5:54 pm

SOF

MDW

18h 54m

2 stops

$764KLM

Useful Info

Low season	November
High season	July
Cheapest flight	$307

Best time to beat the crowds with an average 13% drop in price.

Most popular time to fly with an average 8% 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

$296 Find Cheap Flights from Illinois to Sofia

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

Everything you should know

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