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 32% 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?

JetBlue 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 September 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.

$448 Cheap Flights from Sofia to Illinois in 2026

Discover deals from 900+ travel sites with momondo.

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.

2:35 pm - 7:55 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 20m1 stop Warsaw Frederic Chopin

9:50 pm - 2:00 amORD Chicago O'Hare Intl-SOF Sofia

20h 10m1 stop Warsaw Frederic Chopin

$821LOT

Sun, Feb 28 - Wed, May 26

2:35 pm - 7:55 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 20m1 stop Warsaw Frederic Chopin

9:50 pm - 2:00 amORD Chicago O'Hare Intl-SOF Sofia

20h 10m1 stop Warsaw Frederic Chopin

$821LOT

Sat, Feb 27 - Thu, May 27

10:10 pm - 4:30 pmSOF Sofia-ORD Chicago O'Hare Intl

25h 20m2 stops Barcelona-El Prat Lisbon Humberto Delgado

3:55 pm - 1:55 pmORD Chicago O'Hare Intl-SOF Sofia

14h 00m1 stop Dublin

$822Multiple Airlines

Sat, Oct 31 - Tue, Nov 10

5:00 am - 7:55 pmSOF Sofia-ORD Chicago O'Hare Intl

22h 55m3 stops Belgrade Nikola Tesla Berlin Brandenburg Frankfurt am Main

5:20 pm - 1:05 amORD Chicago O'Hare Intl-SOF Sofia

24h 45m2 stops Frankfurt am Main Berlin Brandenburg

$826Multiple Airlines

Thu, Oct 15 - Thu, Oct 29

3:50 pm - 9:40 amSOF Sofia-ORD Chicago O'Hare Intl

25h 50m1 stop Istanbul

12:45 pm - 3:10 pmORD Chicago O'Hare Intl-SOF Sofia

19h 25m1 stop Istanbul

$835Turkish Airlines

Tue, Oct 6 - Mon, Oct 26

3:50 pm - 9:40 amSOF Sofia-ORD Chicago O'Hare Intl

25h 50m1 stop Istanbul

9:15 pm - 3:10 pmORD Chicago O'Hare Intl-SOF Sofia

34h 55m1 stop Istanbul

$835Turkish Airlines

Tue, Oct 6 - Sun, Oct 25

6:20 am - 12:55 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 35m1 stop Frankfurt am Main

3:35 pm - 12:10 pmORD Chicago O'Hare Intl-SOF Sofia

12h 35m1 stop Munich Franz Josef Strauss

$842Lufthansa

Sat, Sep 19 - Mon, Oct 5

1:50 pm - 7:55 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 05m1 stop Frankfurt am Main

3:35 pm - 12:10 pmORD Chicago O'Hare Intl-SOF Sofia

12h 35m1 stop Munich Franz Josef Strauss

$845Lufthansa

Wed, Sep 30 - Wed, Oct 14

4:05 pm - 1:20 pmSOF Sofia-ORD Chicago O'Hare Intl

29h 15m1 stop Vienna Intl

12:55 pm - 3:20 pmORD Chicago O'Hare Intl-SOF Sofia

18h 25m2 stops Washington, D.C. Dulles Intl Vienna Intl

$862Austrian Airlines

Thu, Sep 17 - Thu, Sep 24

4:05 pm - 1:20 pmSOF Sofia-ORD Chicago O'Hare Intl

29h 15m1 stop Vienna Intl

12:55 pm - 6:10 pmORD Chicago O'Hare Intl-SOF Sofia

21h 15m2 stops Washington, D.C. Dulles Intl Vienna Intl

$872Austrian Airlines

Sun, Sep 20 - Tue, Oct 20

Cheap last minute flights

Enter your travel dates to find the best prices.

4:05 pm - 1:20 pmSOF Sofia-ORD Chicago O'Hare Intl

29h 15m1 stop Vienna Intl

9:40 pm - 11:00 pmORD Chicago O'Hare Intl-SOF Sofia

17h 20m1 stop Munich Franz Josef Strauss

$901Multiple Airlines

Fri, Sep 4 - Fri, May 7

12:55 pm - 6:15 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 20m1 stop Munich Franz Josef Strauss

1:55 pm - 6:40 pmORD Chicago O'Hare Intl-SOF Sofia

20h 45m2 stops Boston Logan Intl Munich Franz Josef Strauss

$910United Airlines

Fri, Sep 4 - Fri, May 7

4:05 pm - 4:59 pmSOF Sofia-ORD Chicago O'Hare Intl

32h 54m2 stops Vienna Intl Washington, D.C. Dulles Intl

1:12 pm - 11:40 amORD Chicago O'Hare Intl-SOF Sofia

14h 28m2 stops Washington, D.C. Dulles Intl Vienna Intl

$917Austrian Airlines

Fri, Sep 4 - Fri, May 7

6:10 am - 6:15 pmSOF Sofia-ORD Chicago O'Hare Intl

20h 05m1 stop Munich Franz Josef Strauss

7:00 pm - 1:15 pmORD Chicago O'Hare Intl-SOF Sofia

11h 15m1 stop Munich Franz Josef Strauss

$1,009United Airlines

Wed, Sep 2 - Sat, Oct 31

7:25 pm - 12:35 pmSOF Sofia-ORD Chicago O'Hare Intl

25h 10m1 stop Munich Franz Josef Strauss

5:20 pm - 11:50 amORD Chicago O'Hare Intl-SOF Sofia

11h 30m1 stop Vienna Intl

$1,029Multiple Airlines

Wed, Sep 2 - Sat, Oct 31

7:25 pm - 6:15 pmSOF Sofia-ORD Chicago O'Hare Intl

30h 50m1 stop Munich Franz Josef Strauss

7:00 pm - 1:15 pmORD Chicago O'Hare Intl-SOF Sofia

11h 15m1 stop Munich Franz Josef Strauss

$1,038Lufthansa

Wed, Sep 2 - Sat, Oct 31

7:25 pm - 12:55 pmSOF Sofia-ORD Chicago O'Hare Intl

25h 30m2 stops Munich Franz Josef Strauss Frankfurt am Main

10:50 pm - 10:55 pmORD Chicago O'Hare Intl-SOF Sofia

17h 05m1 stop Munich Franz Josef Strauss

$1,052Lufthansa

Wed, Sep 2 - Sat, Oct 31

2:35 pm - 3:05 pmSOF Sofia-ORD Chicago O'Hare Intl

32h 30m2 stops Warsaw Frederic Chopin Krakow J. Paul II Balice

10:50 pm - 5:55 pmORD Chicago O'Hare Intl-SOF Sofia

12h 05m1 stop Warsaw Frederic Chopin

$1,130LOT

Wed, Sep 2 - Sat, Oct 31

8:00 am - 4:59 pmSOF Sofia-ORD Chicago O'Hare Intl

16h 59m2 stops Vienna Intl Washington, D.C. Dulles Intl

2:29 pm - 11:50 amORD Chicago O'Hare Intl-SOF Sofia

14h 21m2 stops Washington, D.C. Dulles Intl Vienna Intl

$1,140Austrian Airlines

Wed, Sep 2 - Sat, Oct 31

2:35 pm - 7:50 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 15m1 stop Warsaw Frederic Chopin

10:50 pm - 5:55 pmORD Chicago O'Hare Intl-SOF Sofia

12h 05m1 stop Warsaw Frederic Chopin

$1,191LOT

Wed, Sep 2 - Sat, Oct 31

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LOT flights from Sofia to Illinois

Our best LOT deals on Sofia to Illinois flight tickets

LOT

Feb 27

SOF2:35 pmSofia

13h 20m

1 stop

ORD7:55 pmChicago O'Hare Intl

May 27

ORD9:50 pmChicago O'Hare Intl

20h 10m

1 stop

SOF2:00 amSofia

$821

LOT

Oct 5

SOF6:45 pmSofia

33h 05m

1 stop

ORD7:50 pmChicago O'Hare Intl

Oct 29

ORD10:50 pmChicago O'Hare Intl

32h 00m

1 stop

SOF1:50 pmSofia

$822

LOT

Oct 15

SOF2:35 pmSofia

32h 35m

2 stops

ORD3:10 pmChicago O'Hare Intl

Dec 23

ORD9:50 pmChicago O'Hare Intl

32h 00m

1 stop

SOF1:50 pmSofia

$823

British Airways flights from Sofia to Illinois

Our best British Airways deals on Sofia to Illinois flight tickets

British Airways

Jan 15

SOF8:30 pmSofia

25h 15m

1 stop

ORD1:45 pmChicago O'Hare Intl

Jan 23

ORD3:21 pmChicago O'Hare Intl

19h 14m

2 stops

SOF6:35 pmSofia

$845

British Airways

Sep 28

SOF8:10 pmSofia

28h 36m

2 stops

ORD4:46 pmChicago O'Hare Intl

Dec 5

ORD5:10 pmChicago O'Hare Intl

17h 25m

1 stop

SOF6:35 pmSofia

$846

British Airways

Sep 28

SOF8:10 pmSofia

28h 36m

2 stops

ORD4:46 pmChicago O'Hare Intl

Oct 25

ORD6:10 pmChicago O'Hare Intl

15h 10m

1 stop

SOF4:20 pmSofia

$849

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Sun 2/28

2:35 pm-7:55 pm

1 stop13h 20m

Chicago O'Hare Intl

Wed 5/26

9:50 pm-2:00 am

1 stop20h 10m

$821

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Sat 2/27

2:35 pm-7:55 pm

1 stop13h 20m

Chicago O'Hare Intl

Thu 5/27

9:50 pm-2:00 am

1 stop20h 10m

$821

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Sat 10/31

10:10 pm-4:30 pm

2 stops25h 20m

Chicago O'Hare Intl

Tue 11/10

3:55 pm-1:55 pm

1 stop14h 00m

$822

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Thu 10/15

5:00 am-7:55 pm

3 stops22h 55m

Chicago O'Hare Intl

Thu 10/29

5:20 pm-1:05 am

2 stops24h 45m

$826

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Tue 10/6

3:50 pm-9:40 am

1 stop25h 50m

Chicago O'Hare Intl

Mon 10/26

12:45 pm-3:10 pm

1 stop19h 25m

$835

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Tue 10/6

3:50 pm-9:40 am

1 stop25h 50m

Chicago O'Hare Intl

Sun 10/25

9:15 pm-3:10 pm

1 stop34h 55m

$835

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Sat 9/19

6:20 am-12:55 pm

1 stop14h 35m

Chicago O'Hare Intl

Mon 10/5

3:35 pm-12:10 pm

1 stop12h 35m

$842

Quickest round-trip

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Wed 9/30

1:50 pm-7:55 pm

1 stop14h 05m

Chicago O'Hare Intl

Wed 10/14

3:35 pm-12:10 pm

1 stop12h 35m

$845

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Thu 9/17

4:05 pm-1:20 pm

1 stop29h 15m

Chicago O'Hare Intl

Thu 9/24

12:55 pm-3:20 pm

2 stops18h 25m

$862

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Sun 9/20

4:05 pm-1:20 pm

1 stop29h 15m

Chicago O'Hare Intl

Tue 10/20

12:55 pm-6:10 pm

2 stops21h 15m

$872

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 November. Flight prices, which tend to average around $756, 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 November, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $771.

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 $812 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

Best Price Found	$448
Fastest flight time	13h 20m
Direct flights	None

The best one-way flight to Illinois from Sofia in the past 72 hours is $448. The best round-trip flight deal from Sofia to Illinois found on momondo in the last 72 hours is $821.

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 September 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 $627	Free Cancellation	Rating 7.4 4,478 reviews	Search Turkish Airlines flights
LOT	PriceFrom $629	Free Cancellation	Rating 7.5 1,207 reviews	Search LOT flights
KLM	PriceFrom $652	Free Cancellation	Rating 7.8 1,569 reviews	Search KLM flights
Lufthansa	PriceFrom $714	Free Cancellation	Rating 6.8 8,228 reviews	Search Lufthansa flights
United Airlines	PriceFrom $730	Free Cancellation	Rating 7.4 10,157 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $806	Free Cancellation	Rating 7.6 948 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.