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 39% 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.

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

KLM is the most popular carrier operating from Sofia to Illinois

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 April 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.

$414 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.

3:50 pm - 6:15 pm

SOF

ORD

34h 25m

1 stop

11:25 am - 3:00 pm

ORD

SOF

19h 35m

1 stop

$711Turkish Airlines

Sat, Jun 6 - Fri, Jul 10

9:05 pm - 9:40 am

SOF

ORD

20h 35m

1 stop

8:10 pm - 3:00 pm

ORD

SOF

34h 50m

1 stop

$712Turkish Airlines

Sat, Jun 6 - Fri, Jul 10

2:05 pm - 9:40 am

SOF

ORD

27h 35m

1 stop

11:25 am - 1:15 pm

ORD

SOF

17h 50m

1 stop

$713Turkish Airlines

Sun, Apr 12 - Sat, Apr 25

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

11:25 am - 1:15 pm

ORD

SOF

17h 50m

1 stop

$714Turkish Airlines

Sun, Apr 12 - Sat, Apr 25

2:35 pm - 7:50 pm

SOF

ORD

13h 15m

1 stop

9:50 pm - 6:00 pm

ORD

SOF

12h 10m

1 stop

$751LOT

Thu, May 14 - Mon, May 25

6:45 pm - 3:10 pm

SOF

ORD

28h 25m

2 stops

9:50 pm - 1:55 pm

ORD

SOF

32h 05m

1 stop

$768LOT

Thu, May 14 - Mon, May 25

7:00 am - 5:58 pm

SOF

MDW

18h 58m

2 stops

1:24 pm - 2:00 pm

MDW

SOF

16h 36m

2 stops

$825KLM

Mon, Apr 20 - Tue, May 5

7:00 am - 5:58 pm

SOF

MDW

18h 58m

2 stops

1:59 pm - 2:00 pm

MDW

SOF

16h 01m

2 stops

$831Multiple Airlines

Mon, Apr 27 - Tue, May 12

7:00 am - 5:58 pm

SOF

MDW

18h 58m

2 stops

1:24 pm - 2:00 pm

MDW

SOF

16h 36m

2 stops

$836KLM

Mon, Apr 20 - Tue, May 5

7:00 am - 5:58 pm

SOF

MDW

18h 58m

2 stops

1:16 pm - 2:00 pm

MDW

SOF

16h 44m

2 stops

$959Multiple Airlines

Wed, Apr 22 - Fri, Jun 12

Turkish Airlines flights from Sofia to Illinois

Our best Turkish Airlines deals on Sofia to Illinois flight tickets

Turkish Airlines

Jul 8

SOF9:05 pmSofia

20h 35m

1 stop

ORD9:40 amChicago O'Hare Intl

Aug 18

ORD11:25 amChicago O'Hare Intl

13h 20m

1 stop

SOF8:45 amSofia

$711

Turkish Airlines

Jul 8

SOF3:50 pmSofia

25h 50m

1 stop

ORD9:40 amChicago O'Hare Intl

Aug 18

ORD11:25 amChicago O'Hare Intl

24h 50m

1 stop

SOF8:15 pmSofia

$712

Turkish Airlines

May 15

SOF2:05 pmSofia

27h 35m

1 stop

ORD9:40 amChicago O'Hare Intl

Aug 15

ORD8:10 pmChicago O'Hare Intl

34h 50m

1 stop

SOF3:00 pmSofia

$713

LOT flights from Sofia to Illinois

Our best LOT deals on Sofia to Illinois flight tickets

LOT

Sep 9

SOF2:35 pmSofia

32h 35m

1 stop

ORD3:10 pmChicago O'Hare Intl

Sep 30

ORD9:50 pmChicago O'Hare Intl

20h 05m

1 stop

SOF1:55 amSofia

$716

LOT

Sep 9

SOF6:45 pmSofia

28h 25m

1 stop

ORD3:10 pmChicago O'Hare Intl

Sep 30

ORD5:10 pmChicago O'Hare Intl

12h 40m

1 stop

SOF1:50 pmSofia

$717

LOT

Sep 9

SOF6:45 pmSofia

28h 25m

1 stop

ORD3:10 pmChicago O'Hare Intl

Sep 30

ORD9:50 pmChicago O'Hare Intl

12h 10m

1 stop

SOF6:00 pmSofia

$721

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 6/6

3:50 pm-6:15 pm

1 stop34h 25m

Chicago O'Hare Intl

Fri 7/10

11:25 am-3:00 pm

1 stop19h 35m

$711

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 6/6

9:05 pm-9:40 am

1 stop20h 35m

Chicago O'Hare Intl

Fri 7/10

8:10 pm-3:00 pm

1 stop34h 50m

$712

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 4/12

2:05 pm-9:40 am

1 stop27h 35m

Chicago O'Hare Intl

Sat 4/25

11:25 am-1:15 pm

1 stop17h 50m

$713

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 4/12

3:50 pm-9:40 am

1 stop25h 50m

Chicago O'Hare Intl

Sat 4/25

11:25 am-1:15 pm

1 stop17h 50m

$714

Quickest round-trip

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 5/14

2:35 pm-7:50 pm

1 stop13h 15m

Chicago O'Hare Intl

Mon 5/25

9:50 pm-6:00 pm

1 stop12h 10m

$751

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 5/14

6:45 pm-3:10 pm

2 stops28h 25m

Chicago O'Hare Intl

Mon 5/25

9:50 pm-1:55 pm

1 stop32h 05m

$768

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Mon 4/20

7:00 am-5:58 pm

2 stops18h 58m

Chicago Midway

Tue 5/5

1:24 pm-2:00 pm

2 stops16h 36m

$825

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Mon 4/27

7:00 am-5:58 pm

2 stops18h 58m

Chicago Midway

Tue 5/12

1:59 pm-2:00 pm

2 stops16h 01m

$831

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Mon 4/20

7:00 am-5:58 pm

2 stops18h 58m

Chicago Midway

Tue 5/5

1:24 pm-2:00 pm

2 stops16h 36m

$836

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Wed 4/22

7:00 am-5:58 pm

2 stops18h 58m

Chicago Midway

Fri 6/12

1:16 pm-2:00 pm

2 stops16h 44m

$959

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 $707, 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 September is also cheap. Prices for this month can be found on momondo for an average of $708.

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 $763 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 $710 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	12h 50m
Direct flights	None

The fastest flight from Sofia to Illinois takes 12h 50m

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

Search flight deals

Frequently asked questions about flying from Sofia to Illinois

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 April 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 $618	Free Cancellation	Rating 7.5 1,184 reviews	Search LOT flights
Turkish Airlines	PriceFrom $625	Free Cancellation	Rating 7.3 4,300 reviews	Search Turkish Airlines flights
KLM	PriceFrom $631	Free Cancellation	Rating 7.7 1,491 reviews	Search KLM flights
Austrian Airlines	PriceFrom $654	Free Cancellation	Rating 7.6 905 reviews	Search Austrian Airlines flights
United Airlines	PriceFrom $683	Free Cancellation	Rating 7.4 9,548 reviews	Search United Airlines flights
Lufthansa	PriceFrom $710	Free Cancellation	Rating 6.8 7,894 reviews	Search Lufthansa 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.