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 37% 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 May 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.

$401 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.

9:05 pm - 9:40 am

SOF

ORD

20h 35m

1 stop

11:25 am - 3:00 pm

ORD

SOF

19h 35m

1 stop

$776Turkish Airlines

Mon, Jul 6 - Sun, Jul 19

9:05 pm - 9:40 am

SOF

ORD

20h 35m

1 stop

8:10 pm - 3:00 pm

ORD

SOF

34h 50m

1 stop

$786Turkish Airlines

Mon, Jul 6 - Mon, Jul 13

9:05 pm - 9:40 am

SOF

ORD

20h 35m

1 stop

11:25 am - 3:00 pm

ORD

SOF

19h 35m

1 stop

$787Turkish Airlines

Wed, Jun 17 - Sun, Jul 19

2:35 pm - 7:50 pm

SOF

ORD

13h 15m

1 stop

5:10 pm - 6:00 pm

ORD

SOF

16h 50m

1 stop

$788LOT

Wed, Jul 8 - Thu, Aug 13

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

8:10 pm - 8:45 am

ORD

SOF

28h 35m

1 stop

$790Turkish Airlines

Mon, Jun 15 - Sat, Jul 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

$791LOT

Wed, Jul 8 - Thu, Aug 13

7:00 am - 4:27 pm

SOF

MDW

17h 27m

2 stops

1:05 pm - 2:00 pm

MDW

SOF

16h 55m

2 stops

$817KLM

Tue, Sep 1 - Mon, Sep 14

7:00 am - 6:05 pm

SOF

MDW

19h 05m

2 stops

1:00 pm - 2:00 pm

MDW

SOF

17h 00m

2 stops

$863KLM

Wed, Sep 2 - Thu, Sep 17

7:00 am - 6:18 pm

SOF

MDW

19h 18m

2 stops

1:49 pm - 2:00 pm

MDW

SOF

16h 11m

2 stops

$933Multiple Airlines

Mon, Jun 15 - Sat, Jul 25

7:00 am - 6:18 pm

SOF

MDW

19h 18m

2 stops

1:49 pm - 2:00 pm

MDW

SOF

16h 11m

2 stops

$934Multiple Airlines

Mon, Jun 15 - Sat, Jul 25

Austrian Airlines flights from Sofia to Illinois

Our best Austrian Airlines deals on Sofia to Illinois flight tickets

Austrian Airlines

Aug 31

SOF8:00 amSofia

13h 20m

1 stop

ORD1:20 pmChicago O'Hare Intl

Nov 16

ORD4:20 pmChicago O'Hare Intl

11h 30m

1 stop

SOF11:50 amSofia

$841

Austrian Airlines

May 31

SOF6:55 pmSofia

25h 05m

2 stops

ORD12:00 pmChicago O'Hare Intl

Jun 26

ORD11:07 amChicago O'Hare Intl

16h 33m

2 stops

SOF11:40 amSofia

$917

Austrian Airlines

May 30

SOF12:25 pmSofia

32h 30m

2 stops

ORD12:55 pmChicago O'Hare Intl

Jun 26

ORD11:07 amChicago O'Hare Intl

16h 33m

2 stops

SOF11:40 amSofia

$971

LOT flights from Sofia to Illinois

Our best LOT deals on Sofia to Illinois flight tickets

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

$783

LOT

Jul 8

SOF2:35 pmSofia

13h 15m

1 stop

ORD7:50 pmChicago O'Hare Intl

Aug 13

ORD5:10 pmChicago O'Hare Intl

16h 50m

1 stop

SOF6:00 pmSofia

$788

LOT

Jul 8

SOF2:35 pmSofia

13h 15m

1 stop

ORD7:50 pmChicago O'Hare Intl

Aug 13

ORD9:50 pmChicago O'Hare Intl

12h 10m

1 stop

SOF6:00 pmSofia

$791

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 7/6

9:05 pm-9:40 am

1 stop20h 35m

Chicago O'Hare Intl

Sun 7/19

11:25 am-3:00 pm

1 stop19h 35m

$776

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 7/6

9:05 pm-9:40 am

1 stop20h 35m

Chicago O'Hare Intl

Mon 7/13

8:10 pm-3:00 pm

1 stop34h 50m

$786

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 6/17

9:05 pm-9:40 am

1 stop20h 35m

Chicago O'Hare Intl

Sun 7/19

11:25 am-3:00 pm

1 stop19h 35m

$787

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 7/8

2:35 pm-7:50 pm

1 stop13h 15m

Chicago O'Hare Intl

Thu 8/13

5:10 pm-6:00 pm

1 stop16h 50m

$788

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 6/15

3:50 pm-9:40 am

1 stop25h 50m

Chicago O'Hare Intl

Sat 7/25

8:10 pm-8:45 am

1 stop28h 35m

$790

Quickest round-trip

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 7/8

2:35 pm-7:50 pm

1 stop13h 15m

Chicago O'Hare Intl

Thu 8/13

9:50 pm-6:00 pm

1 stop12h 10m

$791

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Tue 9/1

7:00 am-4:27 pm

2 stops17h 27m

Chicago Midway

Mon 9/14

1:05 pm-2:00 pm

2 stops16h 55m

$817

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Wed 9/2

7:00 am-6:05 pm

2 stops19h 05m

Chicago Midway

Thu 9/17

1:00 pm-2:00 pm

2 stops17h 00m

$863

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Mon 6/15

7:00 am-6:18 pm

2 stops19h 18m

Chicago Midway

Sat 7/25

1:49 pm-2:00 pm

2 stops16h 11m

$933

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Mon 6/15

7:00 am-6:18 pm

2 stops19h 18m

Chicago Midway

Sat 7/25

1:49 pm-2:00 pm

2 stops16h 11m

$934

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 January. Flight prices, which tend to average around $388, 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 January, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $466.

How far in advance should I book a flight from Sofia 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 $775 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 $717 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 20m
Direct flights	None

The fastest flight from Sofia to Illinois takes 13h 20m

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 May 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
Turkish Airlines	PriceFrom $616	Free Cancellation	Rating 7.4 4,392 reviews	Search Turkish Airlines flights
LOT	PriceFrom $629	Free Cancellation	Rating 7.5 1,194 reviews	Search LOT flights
KLM	PriceFrom $652	Free Cancellation	Rating 7.8 1,519 reviews	Search KLM flights
Austrian Airlines	PriceFrom $658	Free Cancellation	Rating 7.6 921 reviews	Search Austrian Airlines flights
United Airlines	PriceFrom $685	Free Cancellation	Rating 7.4 9,753 reviews	Search United Airlines flights
Lufthansa	PriceFrom $710	Free Cancellation	Rating 6.8 8,019 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.