What is the cheapest airline that flies from Sofia to Illinois?

British Airways and Air Serbia are the most popular carriers operating from Sofia to Illinois

What airlines fly to Illinois?

LOT, Lufthansa and United Airlines are the top three most popular airlines that fly to Illinois from Sofia according to our data. LOT is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 8 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Sofia Airport to Illinois?

Prices for flights from Sofia Airport to Illinois are updated daily.

How many operators does momondo search for flights from Sofia Airport to Illinois?

As of November 2025, there are 8 operators available to choose from for flights from Sofia Airport to Illinois.

How old do you have to be to fly from Sofia Airport to Illinois?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sofia Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$322 Cheap Flights from Sofia to Illinois in 2025/26

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Find the cheapest flights from Sofia to Illinois

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:00 pm - 11:05 amSOF-ORD

26h 05m1 stop

12:50 pm - 3:10 pmORD-SOF

19h 20m1 stop

$672Turkish Airlines

Find Deal

Sun, Mar 15 - Fri, Mar 20

6:05 am - 2:10 pmSOF-ORD

16h 05m1 stop

6:00 pm - 1:15 pmORD-SOF

11h 15m1 stop

$677Lufthansa

Find Deal

Sun, Dec 14 - Tue, Dec 30

2:40 pm - 3:10 pmSOF-ORD

56h 30m2 stops

9:40 pm - 1:55 pmORD-SOF

32h 15m1 stop

$679LOT

Find Deal

Fri, Apr 24 - Tue, Apr 28

2:40 pm - 3:10 pmSOF-ORD

56h 30m2 stops

9:40 pm - 2:00 amORD-SOF

20h 20m1 stop

$680LOT

Find Deal

Fri, Apr 24 - Tue, Apr 28

2:40 pm - 3:10 pmSOF-ORD

56h 30m2 stops

9:40 pm - 2:00 amORD-SOF

20h 20m1 stop

$682LOT

Find Deal

Fri, Apr 24 - Tue, Apr 28

7:00 am - 2:20 pmSOF-ORD

15h 20m1 stop

4:25 pm - 2:05 pmORD-SOF

13h 40m1 stop

$693KLM

Find Deal

Sat, Jan 17 - Sat, Feb 21

7:00 am - 2:20 pmSOF-ORD

15h 20m1 stop

2:20 pm - 2:05 pmORD-SOF

15h 45m2 stops

$698KLM

Find Deal

Fri, Jan 16 - Thu, Feb 19

2:25 pm - 8:05 pmSOF-ORD

13h 40m1 stop

6:00 pm - 1:15 pmORD-SOF

11h 15m1 stop

$711United Airlines

Find Deal

Sun, Dec 14 - Tue, Dec 30

6:10 am - 1:10 pmSOF-ORD

15h 00m1 stop

1:10 pm - 1:15 pmORD-SOF

16h 05m2 stops

$712United Airlines

Find Deal

Mon, Dec 8 - Tue, May 26

7:55 am - 2:00 pmSOF-ORD

14h 05m1 stop

4:20 pm - 6:10 pmORD-SOF

17h 50m1 stop

$741Austrian Airlines

Find Deal

Mon, Dec 8 - Tue, May 26

Turkish Airlines flights from Sofia to Illinois

Our best Turkish Airlines deals on Sofia to Illinois flight tickets

Turkish Airlines

Mar 15

SOF4:00 pmSofia

26h 05m

1 stop

ORD11:05 amChicago O'Hare Intl

Mar 20

ORD12:50 pmChicago O'Hare Intl

19h 20m

1 stop

SOF3:10 pmSofia

$672

Find similar

Turkish Airlines

Dec 14

SOF4:00 pmSofia

34h 25m

1 stop

ORD6:25 pmChicago O'Hare Intl

Dec 30

ORD11:50 amChicago O'Hare Intl

25h 00m

1 stop

SOF8:50 pmSofia

$686

Find similar

Turkish Airlines

Dec 15

SOF9:40 pmSofia

20h 25m

1 stop

ORD10:05 amChicago O'Hare Intl

Jan 6

ORD11:50 amChicago O'Hare Intl

19h 20m

1 stop

SOF3:10 pmSofia

$687

Find similar

Lufthansa flights from Sofia to Illinois

Our best Lufthansa deals on Sofia to Illinois flight tickets

Lufthansa

Dec 14

SOF6:05 amSofia

16h 05m

1 stop

ORD2:10 pmChicago O'Hare Intl

Dec 30

ORD6:00 pmChicago O'Hare Intl

11h 15m

1 stop

SOF1:15 pmSofia

$677

Find similar

Lufthansa

Nov 22

SOF6:05 amSofia

17h 15m

2 stops

ORD3:20 pmChicago O'Hare Intl

Oct 31

ORD5:20 pmChicago O'Hare Intl

13h 25m

1 stop

SOF1:45 pmSofia

$699

Find similar

Lufthansa

Nov 16

SOF7:05 pmSofia

31h 20m

1 stop

ORD6:25 pmChicago O'Hare Intl

Dec 23

ORD2:31 pmChicago O'Hare Intl

38h 44m

2 stops

SOF1:15 pmSofia

$794

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 3/15

4:00 pm-11:05 am

1 stop26h 05m

Chicago O'Hare Intl

Fri 3/20

12:50 pm-3:10 pm

1 stop19h 20m

$672

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 12/14

6:05 am-2:10 pm

1 stop16h 05m

Chicago O'Hare Intl

Tue 12/30

6:00 pm-1:15 pm

1 stop11h 15m

$677

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 4/24

2:40 pm-3:10 pm

2 stops56h 30m

Chicago O'Hare Intl

Tue 4/28

9:40 pm-1:55 pm

1 stop32h 15m

$679

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 4/24

2:40 pm-3:10 pm

2 stops56h 30m

Chicago O'Hare Intl

Tue 4/28

9:40 pm-2:00 am

1 stop20h 20m

$680

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 4/24

2:40 pm-3:10 pm

2 stops56h 30m

Chicago O'Hare Intl

Tue 4/28

9:40 pm-2:00 am

1 stop20h 20m

$682

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 1/17

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Sat 2/21

4:25 pm-2:05 pm

1 stop13h 40m

$693

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 1/16

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Thu 2/19

2:20 pm-2:05 pm

2 stops15h 45m

$698

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 12/14

2:25 pm-8:05 pm

1 stop13h 40m

Chicago O'Hare Intl

Tue 12/30

6:00 pm-1:15 pm

1 stop11h 15m

$711

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 12/8

6:10 am-1:10 pm

1 stop15h 00m

Chicago O'Hare Intl

Tue 5/26

1:10 pm-1:15 pm

2 stops16h 05m

$712

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 12/8

7:55 am-2:00 pm

1 stop14h 05m

Chicago O'Hare Intl

Tue 5/26

4:20 pm-6:10 pm

1 stop17h 50m

$741

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Sofia to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Sofia is in February. Flight prices, which tend to average around $673, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $679.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Sofia to Illinois is on a Thursday when prices can be found for as low as $666. Flights from Sofia to Illinois on a Wednesday will generally be more expensive and average around $785. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Sofia to Illinois during this time can be as low as $666. Flights in the evening are often more expensive with an average ticket price of $768.

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Sofia when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $718 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Sofia for as low as $639 on momondo.

Cheap Sofia to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sofia to Illinois

Direct flights	None

There are no direct flights from Sofia to Illinois. There are no popular flight routes from Sofia to Illinois.

Search flight deals

When did momondo last update prices for flights from Sofia Airport to Illinois?
Prices for flights from Sofia Airport to Illinois are updated daily.
How many operators does momondo search for flights from Sofia Airport to Illinois?
As of November 2025, there are 8 operators available to choose from for flights from Sofia Airport to Illinois.
How old do you have to be to fly from Sofia Airport to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sofia Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Sofia to Illinois

Compare and see reviews for airlines that fly from Sofia to Illinois with momondo

Airline	Rating	Free Cancellation	Price
LOT	PriceFrom $532	Free Cancellation	Rating 7.6 1,135 reviews	Search LOT flights
British Airways	PriceFrom $546	Free Cancellation	Rating 6.7 7,506 reviews	Search British Airways flights
Air France	PriceFrom $560	Free Cancellation	Rating 7.4 1,486 reviews	Search Air France flights
KLM	PriceFrom $604	Free Cancellation	Rating 7.7 1,410 reviews	Search KLM flights
Turkish Airlines	PriceFrom $625	Free Cancellation	Rating 7.3 4,035 reviews	Search Turkish Airlines flights
Lufthansa	PriceFrom $630	Free Cancellation	Rating 6.8 7,562 reviews	Search Lufthansa flights
United Airlines	PriceFrom $641	Free Cancellation	Rating 7.4 9,012 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $654	Free Cancellation	Rating 7.6 864 reviews	Search Austrian Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Sofia to Illinois?

Finding the right flight to Illinois from Sofia is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

Can I find flights from Sofia to Illinois with flexible booking policies on momondo?

All flight searches from Sofia to Illinois on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Sofia to Illinois?

momondo helps you find the best flight between Sofia and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Sofia to Illinois right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Illinois, momondo offers a useful price alert feature which will track prices for flights to Illinois from Sofia and alert you when they change.