What airlines fly to Illinois?

LOT, Lufthansa and Turkish 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.

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 October 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.

$393 Cheap Flights from Sofia to Illinois in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

10:10 pm - 3:30 pmSOF Sofia-ORD Chicago O'Hare Intl

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

9:40 pm - 6:40 pmORD Chicago O'Hare Intl-SOF Sofia

13h 00m1 stop Munich Franz Josef Strauss

$809Multiple Airlines

Sat, Nov 21 - Sat, Apr 17

10:10 pm - 3:30 pmSOF Sofia-ORD Chicago O'Hare Intl

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

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

12h 35m1 stop Munich Franz Josef Strauss

$810Multiple Airlines

Sat, Nov 21 - Fri, Apr 16

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

13h 15m1 stop Warsaw Frederic Chopin

9:50 pm - 6:00 pmORD Chicago O'Hare Intl-SOF Sofia

12h 10m1 stop Warsaw Frederic Chopin

$811LOT

Sun, Apr 18 - Tue, May 18

6:45 pm - 7:50 pmSOF Sofia-ORD Chicago O'Hare Intl

33h 05m1 stop Warsaw Frederic Chopin

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

20h 10m1 stop Warsaw Frederic Chopin

$811LOT

Mon, Apr 12 - Tue, May 18

6:25 am - 1:10 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 45m1 stop Frankfurt am Main

9:50 pm - 10:55 pmORD Chicago O'Hare Intl-SOF Sofia

17h 05m1 stop Munich Franz Josef Strauss

$828Lufthansa

Fri, Nov 13 - Thu, Nov 26

6:25 am - 1:10 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 45m1 stop Frankfurt am Main

4:20 pm - 1:25 pmORD Chicago O'Hare Intl-SOF Sofia

13h 05m1 stop Frankfurt am Main

$830Lufthansa

Thu, Nov 5 - Wed, Nov 18

6:25 am - 8:05 pmSOF Sofia-ORD Chicago O'Hare Intl

21h 40m1 stop Frankfurt am Main

6:00 pm - 1:15 pmORD Chicago O'Hare Intl-SOF Sofia

11h 15m1 stop Munich Franz Josef Strauss

$858United Airlines

Wed, Nov 4 - Sun, Jan 3

6:25 am - 8:05 pmSOF Sofia-ORD Chicago O'Hare Intl

21h 40m1 stop Frankfurt am Main

6:00 pm - 10:55 pmORD Chicago O'Hare Intl-SOF Sofia

20h 55m1 stop Munich Franz Josef Strauss

$858United Airlines

Fri, Nov 6 - Sun, Jan 3

7:55 am - 2:00 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 05m1 stop Vienna Intl

1:12 pm - 3:20 pmORD Chicago O'Hare Intl-SOF Sofia

18h 08m2 stops Washington, D.C. Dulles Intl Vienna Intl

$876Austrian Airlines

Mon, Nov 23 - Sat, Apr 17

6:45 pm - 2:00 pmSOF Sofia-ORD Chicago O'Hare Intl

27h 15m1 stop Vienna Intl

1:12 pm - 3:20 pmORD Chicago O'Hare Intl-SOF Sofia

18h 08m2 stops Washington, D.C. Dulles Intl Vienna Intl

$876Austrian Airlines

Sun, Nov 22 - Sat, Apr 17

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SWISS flights from Sofia to Illinois

Our best SWISS deals on Sofia to Illinois flight tickets

SWISS

Nov 2

SOF3:00 pmSofia

33h 15m

1 stop

ORD4:15 pmChicago O'Hare Intl

Nov 18

ORD6:50 pmChicago O'Hare Intl

12h 35m

1 stop

SOF3:25 pmSofia

$823

SWISS

Nov 2

SOF3:00 pmSofia

33h 15m

1 stop

ORD4:15 pmChicago O'Hare Intl

Nov 18

ORD6:50 pmChicago O'Hare Intl

12h 35m

1 stop

SOF3:25 pmSofia

$839

United Airlines flights from Sofia to Illinois

Our best United Airlines deals on Sofia to Illinois flight tickets

United Airlines

Nov 4

SOF6:25 amSofia

21h 40m

1 stop

ORD8:05 pmChicago O'Hare Intl

Jan 3

ORD6:00 pmChicago O'Hare Intl

11h 15m

1 stop

SOF1:15 pmSofia

$858

United Airlines

Nov 4

SOF6:25 amSofia

21h 40m

1 stop

ORD8:05 pmChicago O'Hare Intl

Dec 2

ORD6:10 pmChicago O'Hare Intl

20h 50m

1 stop

SOF11:00 pmSofia

$859

United Airlines

Apr 15

SOF6:20 amSofia

21h 35m

1 stop

ORD7:55 pmChicago O'Hare Intl

May 23

ORD6:15 pmChicago O'Hare Intl

20h 35m

1 stop

SOF10:50 pmSofia

$860

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Sat 11/21

10:10 pm-3:30 pm

2 stops25h 20m

Chicago O'Hare Intl

Sat 4/17

9:40 pm-6:40 pm

1 stop13h 00m

$809

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Sat 11/21

10:10 pm-3:30 pm

2 stops25h 20m

Chicago O'Hare Intl

Fri 4/16

3:35 pm-12:10 pm

1 stop12h 35m

$810

Quickest round-trip

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Sun 4/18

2:35 pm-7:50 pm

1 stop13h 15m

Chicago O'Hare Intl

Tue 5/18

9:50 pm-6:00 pm

1 stop12h 10m

$811

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Mon 4/12

6:45 pm-7:50 pm

1 stop33h 05m

Chicago O'Hare Intl

Tue 5/18

9:50 pm-2:00 am

1 stop20h 10m

$811

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Fri 11/13

6:25 am-1:10 pm

1 stop14h 45m

Chicago O'Hare Intl

Thu 11/26

9:50 pm-10:55 pm

1 stop17h 05m

$828

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Thu 11/5

6:25 am-1:10 pm

1 stop14h 45m

Chicago O'Hare Intl

Wed 11/18

4:20 pm-1:25 pm

1 stop13h 05m

$830

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Wed 11/4

6:25 am-8:05 pm

1 stop21h 40m

Chicago O'Hare Intl

Sun 1/3

6:00 pm-1:15 pm

1 stop11h 15m

$858

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Fri 11/6

6:25 am-8:05 pm

1 stop21h 40m

Chicago O'Hare Intl

Sun 1/3

6:00 pm-10:55 pm

1 stop20h 55m

$858

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Mon 11/23

7:55 am-2:00 pm

1 stop14h 05m

Chicago O'Hare Intl

Sat 4/17

1:12 pm-3:20 pm

2 stops18h 08m

$876

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Sun 11/22

6:45 pm-2:00 pm

1 stop27h 15m

Chicago O'Hare Intl

Sat 4/17

1:12 pm-3:20 pm

2 stops18h 08m

$876

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 $777, 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 May is also cheap. Prices for this month can be found on momondo for an average of $778.

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 $835 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 $705 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	$393
Fastest flight time	14h 45m
Direct flights	None

The best one-way flight to Illinois from Sofia in the past 72 hours is $393. The best round-trip flight deal from Sofia to Illinois found on momondo in the last 72 hours is $809.

The fastest flight from Sofia to Illinois takes 14h 45m

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 October 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 $635	Free Cancellation	Rating 7.5 1,193 reviews	Search LOT flights
KLM	PriceFrom $650	Free Cancellation	Rating 7.8 1,592 reviews	Search KLM flights
Turkish Airlines	PriceFrom $685	Free Cancellation	Rating 7.4 4,460 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $735	Free Cancellation	Rating 7.3 10,398 reviews	Search United Airlines flights
Lufthansa	PriceFrom $743	Free Cancellation	Rating 6.8 8,286 reviews	Search Lufthansa flights
Austrian Airlines	PriceFrom $845	Free Cancellation	Rating 7.5 984 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.