What airlines fly to Sofia?

Lufthansa, Turkish Airlines and LOT are the top three most popular airlines that fly to Sofia from Illinois according to our data. Lufthansa is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 12 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

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

KLM, JetBlue, and Air France are the most popular carriers operating from Illinois to Sofia

When did momondo last update prices for flights from Illinois to Sofia Airport?

Prices for flights from Illinois to Sofia Airport refresh daily.

How many operators does momondo search for flights from Illinois to Sofia Airport?

As of June 2026, there are 13 operators available to choose from for flights from Illinois to Sofia Airport.

How old do you have to be to fly from Illinois to Sofia Airport?

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 Illinois to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The required travel and health documents for your Sofia Airport 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 Sofia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$299 Cheap Flights from Illinois to Sofia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:05 pm - 6:00 pm

ORD

SOF

17h 55m

1 stop

6:30 am - 12:55 pm

SOF

ORD

14h 25m

1 stop

$840United Airlines

Mon, Jul 27 - Thu, Aug 20

11:25 am - 3:00 pm

ORD

SOF

19h 35m

1 stop

3:50 pm - 6:15 pm

SOF

ORD

34h 25m

1 stop

$841Turkish Airlines

Sun, Sep 6 - Sun, Oct 4

3:40 pm - 6:40 pm

ORD

SOF

19h 00m

2 stops

6:10 am - 8:12 pm

SOF

ORD

22h 02m

2 stops

$842Air Canada

Tue, Jul 28 - Tue, Sep 8

12:50 pm - 6:20 pm

ORD

SOF

21h 30m

2 stops

6:25 am - 7:52 pm

SOF

ORD

21h 27m

2 stops

$843Air Canada

Fri, Nov 20 - Thu, Dec 3

12:15 pm - 2:00 pm

ORD

SOF

17h 45m

2 stops

7:00 am - 5:34 pm

SOF

ORD

18h 34m

2 stops

$844Multiple Airlines

Wed, Oct 7 - Sun, Oct 18

9:50 pm - 6:00 pm

ORD

SOF

12h 10m

1 stop

2:35 pm - 7:50 pm

SOF

ORD

13h 15m

1 stop

$846LOT

Fri, Sep 11 - Tue, Sep 22

1:27 pm - 2:00 pm

MDW

SOF

16h 33m

2 stops

7:00 am - 6:01 pm

SOF

MDW

19h 01m

2 stops

$846Multiple Airlines

Wed, Aug 19 - Thu, Sep 3

8:10 pm - 1:50 pm

ORD

SOF

33h 40m

1 stop

6:45 pm - 7:50 pm

SOF

ORD

33h 05m

1 stop

$847LOT

Fri, Aug 7 - Mon, Sep 7

10:30 pm - 10:40 pm

ORD

SOF

16h 10m

1 stop

7:00 pm - 12:55 pm

SOF

ORD

25h 55m

1 stop

$848Lufthansa

Mon, Jul 27 - Wed, Aug 12

7:04 pm - 6:10 pm

STL

SOF

15h 06m

2 stops

2:05 pm - 11:09 pm

SOF

STL

17h 04m

2 stops

$863Lufthansa

Wed, Dec 16 - Fri, Dec 25

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Turkish Airlines flights from Illinois to Sofia

Our best Turkish Airlines deals on Illinois to Sofia flight tickets

Turkish Airlines

Sep 6

ORD11:25 amChicago O'Hare Intl

19h 35m

1 stop

SOF3:00 pmSofia

Oct 4

SOF3:50 pmSofia

34h 25m

1 stop

ORD6:15 pmChicago O'Hare Intl

$841

Turkish Airlines

Sep 5

ORD8:10 pmChicago O'Hare Intl

34h 50m

1 stop

SOF3:00 pmSofia

Sep 30

SOF9:10 pmSofia

29h 05m

1 stop

ORD6:15 pmChicago O'Hare Intl

$851

Turkish Airlines

Sep 3

ORD8:10 pmChicago O'Hare Intl

34h 50m

1 stop

SOF3:00 pmSofia

Oct 6

SOF3:50 pmSofia

25h 50m

1 stop

ORD9:40 amChicago O'Hare Intl

$856

United Airlines flights from Illinois to Sofia

Our best United Airlines deals on Illinois to Sofia flight tickets

United Airlines

Jul 27

ORD10:30 pmChicago O'Hare Intl

16h 10m

1 stop

SOF10:40 pmSofia

Aug 21

SOF6:20 amSofia

16h 35m

1 stop

ORD2:55 pmChicago O'Hare Intl

$840

United Airlines

Sep 6

ORD3:35 pmChicago O'Hare Intl

12h 35m

1 stop

SOF12:10 pmSofia

Oct 2

SOF2:10 pmSofia

17h 22m

2 stops

ORD11:32 pmChicago O'Hare Intl

$845

United Airlines

Aug 9

ORD3:35 pmChicago O'Hare Intl

19h 05m

1 stop

SOF6:40 pmSofia

Aug 18

SOF2:10 pmSofia

28h 50m

1 stop

ORD11:00 amChicago O'Hare Intl

$849

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 7/27

4:05 pm-6:00 pm

1 stop17h 55m

Sofia

Thu 8/20

6:30 am-12:55 pm

1 stop14h 25m

$840

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 9/6

11:25 am-3:00 pm

1 stop19h 35m

Sofia

Sun 10/4

3:50 pm-6:15 pm

1 stop34h 25m

$841

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 7/28

3:40 pm-6:40 pm

2 stops19h 00m

Sofia

Tue 9/8

6:10 am-8:12 pm

2 stops22h 02m

$842

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 11/20

12:50 pm-6:20 pm

2 stops21h 30m

Sofia

Thu 12/3

6:25 am-7:52 pm

2 stops21h 27m

$843

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 10/7

12:15 pm-2:00 pm

2 stops17h 45m

Sofia

Sun 10/18

7:00 am-5:34 pm

2 stops18h 34m

$844

Quickest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 9/11

9:50 pm-6:00 pm

1 stop12h 10m

Sofia

Tue 9/22

2:35 pm-7:50 pm

1 stop13h 15m

$846

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Wed 8/19

1:27 pm-2:00 pm

2 stops16h 33m

Sofia

Thu 9/3

7:00 am-6:01 pm

2 stops19h 01m

$846

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 8/7

8:10 pm-1:50 pm

1 stop33h 40m

Sofia

Mon 9/7

6:45 pm-7:50 pm

1 stop33h 05m

$847

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 7/27

10:30 pm-10:40 pm

1 stop16h 10m

Sofia

Wed 8/12

7:00 pm-12:55 pm

1 stop25h 55m

$848

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 12/16

7:04 pm-6:10 pm

2 stops15h 06m

Sofia

Fri 12/25

2:05 pm-11:09 pm

2 stops17h 04m

$863

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 Illinois to Sofia

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 Sofia?

The cheapest month to fly to Sofia from Illinois is in October. Flight prices, which tend to average around $385, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Sofia from Illinois during September instead. Flights to Sofia in September, while not as cheap as those in October, still average around $441.

How far in advance should I book a flight from Illinois to Sofia?

You are more likely to see cheaper flights to Sofia from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $756 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Illinois for as low as $690 on momondo.

Can stopping save me money on Illinois to Sofia flights?

You could potentially save up to 1% on your flight if you consider stops on a Illinois to Sofia flight.

Cheap Illinois to Sofia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Sofia

Fastest flight time	12h 30m
Direct flights	None

The fastest flight from Illinois to Sofia takes 12h 30m

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

Search flight deals

Frequently asked questions about flying from Illinois to Sofia

When did momondo last update prices for flights from Illinois to Sofia Airport?
Prices for flights from Illinois to Sofia Airport refresh daily.
How many operators does momondo search for flights from Illinois to Sofia Airport?
As of June 2026, there are 13 operators available to choose from for flights from Illinois to Sofia Airport.
How old do you have to be to fly from Illinois to Sofia Airport?
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 Illinois to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The required travel and health documents for your Sofia Airport 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 Sofia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Illinois to Sofia

Compare and see reviews for airlines that fly from Illinois to Sofia with momondo

Airline	Rating	Free Cancellation	Price
ITA Airways	PriceFrom $508	Free Cancellation	Rating 6.7 1,267 reviews	Search ITA Airways flights
Turkish Airlines	PriceFrom $520	Free Cancellation	Rating 7.4 4,425 reviews	Search Turkish Airlines flights
SWISS	PriceFrom $565	Free Cancellation	Rating 7.5 1,976 reviews	Search SWISS flights
United Airlines	PriceFrom $566	Free Cancellation	Rating 7.4 9,901 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $575	Free Cancellation	Rating 7.6 937 reviews	Search Austrian Airlines flights
LOT	PriceFrom $578	Free Cancellation	Rating 7.5 1,207 reviews	Search LOT flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.5 1,614 reviews	Search Air France flights
Lufthansa	PriceFrom $586	Free Cancellation	Rating 6.8 8,104 reviews	Search Lufthansa flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 8,076 reviews	Search British Airways flights
KLM	PriceFrom $614	Free Cancellation	Rating 7.8 1,531 reviews	Search KLM flights

Bansko

Borovets

Velingrad

Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Sofia?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to Sofia. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Illinois to Sofia with flexible booking policies on momondo?

momondo does allow users to show only those flights to Sofia from Illinois which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Illinois to Sofia?

momondo helps you find the best flight between Illinois and Sofia 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 Illinois to Sofia right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Illinois to Sofia flights. All you need is a valid email address and we will do the rest; it is that quick and easy.