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

Air Serbia, Qatar Airways, and Lufthansa are the most popular carriers operating from Sofia to Illinois

What airlines fly to Illinois?

Lufthansa, LOT and United Airlines are the top three most popular airlines that fly to Illinois from Sofia according to our data. Lufthansa 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 7 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 July 2025, there are 7 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.

$477 Cheap Flights from Sofia to Illinois in 2025

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Find the cheapest flights from Sofia to Illinois

Round-trip

One-way

Last minute

Cheap round-trip flights

6:15 am - 12:55 pmSOF-ORD

14h 40m1 stop

10:50 am - 11:15 amORD-SOF

16h 25m2 stops

$613United Airlines

Find Deal

qui, set 18 - sex, out 3

3:35 pm - 9:40 amSOF-ORD

26h 05m1 stop

7:50 pm - 2:45 pmORD-SOF

34h 55m1 stop

$616Turkish Airlines

Find Deal

qui, set 18 - sex, out 3

2:05 pm - 7:55 pmSOF-ORD

13h 50m1 stop

6:00 pm - 6:40 pmORD-SOF

16h 40m1 stop

$633Lufthansa

Find Deal

qua, ago 27 - qua, set 3

6:15 am - 12:55 pmSOF-ORD

14h 40m1 stop

9:50 pm - 6:20 pmORD-SOF

12h 30m1 stop

$634Lufthansa

Find Deal

qua, set 10 - qua, dez 10

5:20 am - 7:40 pmSOF-ORD

22h 20m1 stop

4:55 pm - 1:50 pmORD-SOF

12h 55m1 stop

$635LOT

Find Deal

qui, set 18 - sex, out 3

5:20 am - 7:40 pmSOF-ORD

22h 20m1 stop

5:10 pm - 2:00 amORD-SOF

24h 50m2 stops

$656LOT

Find Deal

seg, set 15 - ter, set 30

8:00 am - 1:20 pmSOF-ORD

13h 20m1 stop

4:20 pm - 3:20 pmORD-SOF

15h 00m1 stop

$660Austrian Airlines

Find Deal

seg, set 15 - sáb, set 27

6:55 pm - 6:25 pmSOF-ORD

31h 30m2 stops

12:50 pm - 6:10 pmORD-SOF

21h 20m2 stops

$665Austrian Airlines

Find Deal

dom, set 14 - ter, set 23

7:00 am - 5:35 pmSOF-MDW

18h 35m2 stops

1:08 pm - 2:00 pmMDW-SOF

16h 52m2 stops

$893KLM

Find Deal

qui, set 11 - sáb, set 27

7:00 am - 5:37 pmSOF-MDW

18h 37m2 stops

1:08 pm - 2:00 pmMDW-SOF

16h 52m2 stops

$1,161KLM

Find Deal

sex, ago 15 - sáb, set 13

British Airways flights from Sofia to Illinois

Our best British Airways deals on Sofia to Illinois flight tickets

British Airways

Aug 6

SOF9:30 pmSofia

28h 24m

2 stops

ORD5:54 pmChicago O'Hare Intl

Sep 29

ORD8:25 pmChicago O'Hare Intl

40h 15m

2 stops

SOF8:40 pmSofia

$643

Find similar

British Airways

Sep 26

SOF2:20 pmSofia

30h 21m

2 stops

ORD12:41 pmChicago O'Hare Intl

Oct 15

ORD8:40 pmChicago O'Hare Intl

32h 50m

1 stop

SOF1:30 pmSofia

$648

Find similar

British Airways

Aug 8

SOF2:20 pmSofia

32h 10m

2 stops

ORD2:30 pmChicago O'Hare Intl

Sep 3

ORD8:40 pmChicago O'Hare Intl

32h 50m

1 stop

SOF1:30 pmSofia

$656

Find similar

Austrian Airlines flights from Sofia to Illinois

Our best Austrian Airlines deals on Sofia to Illinois flight tickets

Austrian Airlines

Sep 15

SOF8:00 amSofia

13h 20m

1 stop

ORD1:20 pmChicago O'Hare Intl

Sep 27

ORD4:20 pmChicago O'Hare Intl

15h 00m

1 stop

SOF3:20 pmSofia

$660

Find similar

Austrian Airlines

Sep 14

SOF6:55 pmSofia

31h 30m

2 stops

ORD6:25 pmChicago O'Hare Intl

Sep 23

ORD12:50 pmChicago O'Hare Intl

21h 20m

2 stops

SOF6:10 pmSofia

$665

Find similar

Austrian Airlines

Aug 13

SOF6:55 pmSofia

25h 55m

2 stops

ORD12:50 pmChicago O'Hare Intl

Nov 14

ORD1:00 pmChicago O'Hare Intl

26h 55m

2 stops

SOF11:55 pmSofia

$737

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

qui 9/18

6:15 am-12:55 pm

1 stop14h 40m

Chicago O'Hare Intl

sex 10/3

10:50 am-11:15 am

2 stops16h 25m

$613

SofiaChicago

SOF - ORD

SOFORD

Sofia

qui 9/18

3:35 pm-9:40 am

1 stop26h 05m

Chicago O'Hare Intl

sex 10/3

7:50 pm-2:45 pm

1 stop34h 55m

$616

SofiaChicago

SOF - ORD

SOFORD

Sofia

qua 8/27

2:05 pm-7:55 pm

1 stop13h 50m

Chicago O'Hare Intl

qua 9/3

6:00 pm-6:40 pm

1 stop16h 40m

$633

SofiaChicago

SOF - ORD

SOFORD

Sofia

qua 9/10

6:15 am-12:55 pm

1 stop14h 40m

Chicago O'Hare Intl

qua 12/10

9:50 pm-6:20 pm

1 stop12h 30m

$634

SofiaChicago

SOF - ORD

SOFORD

Sofia

qui 9/18

5:20 am-7:40 pm

1 stop22h 20m

Chicago O'Hare Intl

sex 10/3

4:55 pm-1:50 pm

1 stop12h 55m

$635

SofiaChicago

SOF - ORD

SOFORD

Sofia

seg 9/15

5:20 am-7:40 pm

1 stop22h 20m

Chicago O'Hare Intl

ter 9/30

5:10 pm-2:00 am

2 stops24h 50m

$656

SofiaChicago

SOF - ORD

SOFORD

Sofia

seg 9/15

8:00 am-1:20 pm

1 stop13h 20m

Chicago O'Hare Intl

sáb 9/27

4:20 pm-3:20 pm

1 stop15h 00m

$660

SofiaChicago

SOF - ORD

SOFORD

Sofia

dom 9/14

6:55 pm-6:25 pm

2 stops31h 30m

Chicago O'Hare Intl

ter 9/23

12:50 pm-6:10 pm

2 stops21h 20m

$665

SofiaChicago

SOF - MDW

SOFMDW

Sofia

qui 9/11

7:00 am-5:35 pm

2 stops18h 35m

Chicago Midway

sáb 9/27

1:08 pm-2:00 pm

2 stops16h 52m

$893

SofiaChicago

SOF - MDW

SOFMDW

Sofia

sex 8/15

7:00 am-5:37 pm

2 stops18h 37m

Chicago Midway

sáb 9/13

1:08 pm-2:00 pm

2 stops16h 52m

$1,161

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 $645, 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 October is also cheap. Prices for this month can be found on momondo for an average of $654.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Sofia to Illinois is on a Thursday when prices can be found for as low as $666. Flights from Sofia to Illinois on a Wednesday will generally be more expensive and average around $785. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Sofia to Illinois during this time can be as low as $666. Flights in the evening are often more expensive with an average ticket price of $768.

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 $716 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 $625 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	$477
Fastest flight time	12h 45m
Direct flights	None
Airports in Illinois	2 airports

The best one-way flight to Illinois from Sofia in the past 72 hours is $477. The best round-trip flight deal from Sofia to Illinois found on momondo in the last 72 hours is $613.

The fastest flight from Sofia to Illinois takes 12h 45m

There are no direct flights from Sofia to Illinois. Popular non-direct route for this connection is Sofia Airport - Chicago O'Hare Intl Airport.

There are 2 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW)

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 July 2025, there are 7 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
KLM	PriceFrom $460	Free Cancellation	Rating 7.8 1,383 reviews	Search KLM flights
LOT	PriceFrom $532	Free Cancellation	Rating 7.6 1,105 reviews	Search LOT flights
Air France	PriceFrom $560	Free Cancellation	Rating 7.5 1,465 reviews	Search Air France flights
Austrian Airlines	PriceFrom $576	Free Cancellation	Rating 7.6 823 reviews	Search Austrian Airlines flights
United Airlines	PriceFrom $603	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
Lufthansa	PriceFrom $616	Free Cancellation	Rating 6.8 7,275 reviews	Search Lufthansa flights
Turkish Airlines	PriceFrom $627	Free Cancellation	Rating 7.3 3,933 reviews	Search Turkish 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.