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

Air Serbia is the most popular carrier 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 6 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 February 2026, there are 6 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.

$370 Cheap Flights from Sofia to Illinois in 2026

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Find the cheapest flights from Sofia to Illinois

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 2:20 pm

SOF

ORD

15h 20m

1 stop

5:10 pm - 2:00 pm

ORD

SOF

12h 50m

1 stop

$647Multiple Airlines

Fri, Feb 13 - Wed, Apr 15

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

11:25 am - 8:45 am

ORD

SOF

13h 20m

1 stop

$649Turkish Airlines

Wed, Apr 15 - Fri, May 1

7:00 am - 2:15 pm

SOF

ORD

15h 15m

1 stop

5:10 pm - 2:00 pm

ORD

SOF

12h 50m

1 stop

$650Multiple Airlines

Tue, Apr 14 - Thu, Apr 30

7:00 am - 2:20 pm

SOF

ORD

15h 20m

1 stop

5:20 pm - 1:55 pm

ORD

SOF

12h 35m

1 stop

$651Multiple Airlines

Fri, Feb 13 - Sun, Mar 1

7:00 am - 2:15 pm

SOF

ORD

15h 15m

1 stop

4:20 pm - 2:00 pm

ORD

SOF

13h 40m

1 stop

$655KLM

Tue, Apr 14 - Sat, May 2

7:00 am - 2:20 pm

SOF

ORD

15h 20m

1 stop

1:06 pm - 2:00 pm

ORD

SOF

16h 54m

2 stops

$656Multiple Airlines

Wed, Mar 4 - Tue, Apr 14

7:10 am - 3:10 pm

SOF

ORD

16h 00m

1 stop

5:10 pm - 2:00 pm

ORD

SOF

12h 50m

1 stop

$657Air France

Tue, Feb 17 - Fri, May 8

7:00 am - 6:13 pm

SOF

ORD

19h 13m

2 stops

5:10 pm - 2:00 pm

ORD

SOF

12h 50m

1 stop

$660Multiple Airlines

Wed, Apr 15 - Wed, Apr 29

7:00 am - 2:20 pm

SOF

ORD

15h 20m

1 stop

2:12 pm - 2:05 pm

ORD

SOF

15h 53m

2 stops

$662KLM

Fri, Feb 13 - Sun, Mar 1

7:00 am - 5:45 pm

SOF

MDW

18h 45m

2 stops

1:28 pm - 2:05 pm

MDW

SOF

16h 37m

2 stops

$672KLM

Fri, Feb 13 - Sun, Mar 1

Lufthansa flights from Sofia to Illinois

Our best Lufthansa deals on Sofia to Illinois flight tickets

Lufthansa

Jun 15

SOF6:20 amSofia

14h 35m

1 stop

ORD12:55 pmChicago O'Hare Intl

Jul 5

ORD10:30 pmChicago O'Hare Intl

16h 30m

1 stop

SOF11:00 pmSofia

$702

Lufthansa

Feb 17

SOF6:00 amSofia

17h 20m

1 stop

ORD3:20 pmChicago O'Hare Intl

Jun 14

ORD3:35 pmChicago O'Hare Intl

12h 35m

1 stop

SOF12:10 pmSofia

$809

United Airlines flights from Sofia to Illinois

Our best United Airlines deals on Sofia to Illinois flight tickets

United Airlines

Feb 15

SOF6:10 amSofia

17h 10m

1 stop

ORD3:20 pmChicago O'Hare Intl

May 6

ORD9:40 pmChicago O'Hare Intl

17h 30m

1 stop

SOF11:10 pmSofia

$756

United Airlines

Feb 20

SOF6:10 amSofia

15h 15m

1 stop

ORD1:25 pmChicago O'Hare Intl

Mar 8

ORD10:50 pmChicago O'Hare Intl

16h 55m

1 stop

SOF10:45 pmSofia

$757

United Airlines

Feb 18

SOF6:10 amSofia

22h 00m

2 stops

ORD8:10 pmChicago O'Hare Intl

May 6

ORD9:40 pmChicago O'Hare Intl

17h 30m

1 stop

SOF11:10 pmSofia

$760

Fly from

Fly to

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 2/13

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Wed 4/15

5:10 pm-2:00 pm

1 stop12h 50m

$647

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 4/15

3:50 pm-9:40 am

1 stop25h 50m

Chicago O'Hare Intl

Fri 5/1

11:25 am-8:45 am

1 stop13h 20m

$649

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 4/14

7:00 am-2:15 pm

1 stop15h 15m

Chicago O'Hare Intl

Thu 4/30

5:10 pm-2:00 pm

1 stop12h 50m

$650

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 2/13

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Sun 3/1

5:20 pm-1:55 pm

1 stop12h 35m

$651

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 4/14

7:00 am-2:15 pm

1 stop15h 15m

Chicago O'Hare Intl

Sat 5/2

4:20 pm-2:00 pm

1 stop13h 40m

$655

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 3/4

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Tue 4/14

1:06 pm-2:00 pm

2 stops16h 54m

$656

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 2/17

7:10 am-3:10 pm

1 stop16h 00m

Chicago O'Hare Intl

Fri 5/8

5:10 pm-2:00 pm

1 stop12h 50m

$657

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 4/15

7:00 am-6:13 pm

2 stops19h 13m

Chicago O'Hare Intl

Wed 4/29

5:10 pm-2:00 pm

1 stop12h 50m

$660

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 2/13

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Sun 3/1

2:12 pm-2:05 pm

2 stops15h 53m

$662

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Fri 2/13

7:00 am-5:45 pm

2 stops18h 45m

Chicago Midway

Sun 3/1

1:28 pm-2:05 pm

2 stops16h 37m

$672

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.

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 $732 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 $620 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

Fastest flight time	13h 30m
Direct flights	None

The fastest flight from Sofia to Illinois takes 13h 30m

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 February 2026, there are 6 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 $576	Free Cancellation	Rating 7.5 1,178 reviews	Search LOT flights
KLM	PriceFrom $621	Free Cancellation	Rating 7.7 1,448 reviews	Search KLM flights
Turkish Airlines	PriceFrom $625	Free Cancellation	Rating 7.3 4,210 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $649	Free Cancellation	Rating 7.4 9,235 reviews	Search United Airlines flights
Lufthansa	PriceFrom $650	Free Cancellation	Rating 6.8 7,758 reviews	Search Lufthansa flights
Austrian Airlines	PriceFrom $658	Free Cancellation	Rating 7.5 896 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.