What airlines fly to Sofia?

Turkish Airlines, Lufthansa and LOT are the top three most popular airlines that fly to Sofia from Illinois according to our data. Turkish Airlines is the first choice among our users, with 30% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 10 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?

Turkish Airlines is the most popular carrier 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 August 2025, there are 10 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.

$232 Cheap Flights from Illinois to Sofia in 2025

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Find the cheapest flights from Illinois to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

11:45 pm - 8:35 amORD-SOF

24h 50m1 stop

3:35 pm - 9:40 amSOF-ORD

26h 05m1 stop

$490Turkish Airlines

Find Deal

lun., ago. 25 - mié., sep. 10

11:25 am - 2:45 pmORD-SOF

19h 20m1 stop

9:15 pm - 9:40 amSOF-ORD

20h 25m1 stop

$497Turkish Airlines

Find Deal

lun., sep. 29 - vie., oct. 17

11:45 pm - 2:45 pmORD-SOF

31h 00m1 stop

9:40 pm - 11:05 amSOF-ORD

20h 25m1 stop

$499Turkish Airlines

Find Deal

sáb., sep. 27 - mié., oct. 29

4:20 pm - 11:50 amORD-SOF

11h 30m1 stop

2:30 pm - 8:05 pmSOF-ORD

13h 35m1 stop

$590

Find Deal

mié., dic. 10 - mié., dic. 24

5:10 pm - 4:20 pmORD-SOF

15h 10m1 stop

5:25 pm - 3:25 pmSOF-ORD

30h 00m1 stop

$593British Airways

Find Deal

dom., dic. 28 - lun., mar. 2

1:00 pm - 11:50 amORD-SOF

14h 50m2 stops

7:55 am - 2:00 pmSOF-ORD

14h 05m1 stop

$594Austrian Airlines

Find Deal

mié., nov. 12 - mié., nov. 26

9:15 pm - 1:30 pmORD-SOF

32h 15m1 stop

5:25 pm - 6:45 pmSOF-ORD

33h 20m1 stop

$598British Airways

Find Deal

mié., sep. 3 - lun., nov. 17

9:40 pm - 11:00 pmORD-SOF

17h 20m1 stop

2:35 pm - 8:05 pmSOF-ORD

13h 30m1 stop

$600United Airlines

Find Deal

mar., sep. 9 - vie., nov. 21

6:00 pm - 6:20 pmORD-SOF

16h 20m1 stop

6:10 am - 6:27 pmSOF-ORD

20h 17m2 stops

$602United Airlines

Find Deal

mié., ene. 14 - mié., ene. 28

4:05 pm - 11:15 amSTL-SOF

35h 10m2 stops

12:00 pm - 3:44 pmSOF-STL

35h 44m2 stops

$806

Find Deal

sáb., sep. 27 - sáb., oct. 4

Turkish Airlines flights from Illinois to Sofia

Our best Turkish Airlines deals on Illinois to Sofia flight tickets

Turkish Airlines

Aug 25

ORD11:45 pmChicago O'Hare Intl

24h 50m

1 stop

SOF8:35 amSofia

Sep 10

SOF3:35 pmSofia

26h 05m

1 stop

ORD9:40 amChicago O'Hare Intl

$490

Find similar

Turkish Airlines

Sep 29

ORD11:25 amChicago O'Hare Intl

19h 20m

1 stop

SOF2:45 pmSofia

Oct 17

SOF9:15 pmSofia

20h 25m

1 stop

ORD9:40 amChicago O'Hare Intl

$497

Find similar

Turkish Airlines

Sep 27

ORD11:45 pmChicago O'Hare Intl

31h 00m

1 stop

SOF2:45 pmSofia

Oct 29

SOF9:40 pmSofia

20h 25m

1 stop

ORD11:05 amChicago O'Hare Intl

$499

Find similar

KLM flights from Illinois to Sofia

Our best KLM deals on Illinois to Sofia flight tickets

KLM

Aug 25

MDW1:08 pmChicago Midway

16h 52m

2 stops

SOF2:00 pmSofia

Sep 10

SOF7:00 amSofia

18h 37m

2 stops

MDW5:37 pmChicago Midway

$759

Find similar

KLM

Sep 8

MDW1:43 pmChicago Midway

16h 17m

2 stops

SOF2:00 pmSofia

Oct 13

SOF7:00 amSofia

17h 09m

2 stops

MDW4:09 pmChicago Midway

$802

Find similar

KLM

Aug 31

MDW12:15 pmChicago Midway

17h 45m

2 stops

SOF2:00 pmSofia

Sep 15

SOF7:00 amSofia

22h 36m

2 stops

MDW9:36 pmChicago Midway

$819

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

lun. 8/25

11:45 pm-8:35 am

1 stop24h 50m

Sofia

mié. 9/10

3:35 pm-9:40 am

1 stop26h 05m

$490

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

lun. 9/29

11:25 am-2:45 pm

1 stop19h 20m

Sofia

vie. 10/17

9:15 pm-9:40 am

1 stop20h 25m

$497

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

sáb. 9/27

11:45 pm-2:45 pm

1 stop31h 00m

Sofia

mié. 10/29

9:40 pm-11:05 am

1 stop20h 25m

$499

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mié. 12/10

4:20 pm-11:50 am

1 stop11h 30m

Sofia

mié. 12/24

2:30 pm-8:05 pm

1 stop13h 35m

$590

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 12/28

5:10 pm-4:20 pm

1 stop15h 10m

Sofia

lun. 3/2

5:25 pm-3:25 pm

1 stop30h 00m

$593

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mié. 11/12

1:00 pm-11:50 am

2 stops14h 50m

Sofia

mié. 11/26

7:55 am-2:00 pm

1 stop14h 05m

$594

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mié. 9/3

9:15 pm-1:30 pm

1 stop32h 15m

Sofia

lun. 11/17

5:25 pm-6:45 pm

1 stop33h 20m

$598

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mar. 9/9

9:40 pm-11:00 pm

1 stop17h 20m

Sofia

vie. 11/21

2:35 pm-8:05 pm

1 stop13h 30m

$600

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mié. 1/14

6:00 pm-6:20 pm

1 stop16h 20m

Sofia

mié. 1/28

6:10 am-6:27 pm

2 stops20h 17m

$602

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

sáb. 9/27

4:05 pm-11:15 am

2 stops35h 10m

Sofia

sáb. 10/4

12:00 pm-3:44 pm

2 stops35h 44m

$806

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 February. Flight prices, which tend to average around $565, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Sofia from Illinois during March instead. Flights to Sofia in March, while not as cheap as those in February, still average around $588.

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

According to our data, Thursday is the cheapest day to fly to Sofia from Illinois. The lowest ticket price found for a Thursday departure recently was $871. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Illinois to Sofia on a Saturday will generally be more expensive and average around $1,039. 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 Sofia?

In the morning is the cheapest time of day to fly from Illinois to Sofia when you can find flight prices for as low as $801. Flying to Sofia in the morning is an ideal time because this is during off-peak travel hours. At noon is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,145 per ticket.

How far in advance should I book a flight 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 $769 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 $743 on momondo.

Cheap Illinois to Sofia flight deals and tips

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

Best Price Found	$232
Fastest flight time	11h 30m
Direct flights	None
Airports in Sofia	1 airport

The best one-way flight to Sofia from Illinois in the past 72 hours is $232. The best round-trip flight deal from Illinois to Sofia found on momondo in the last 72 hours is $490.

The fastest flight from Illinois to Sofia takes 11h 30m

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

There is 1 airport near Sofia: Sofia (SOF)

Search flight deals

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 August 2025, there are 10 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
Turkish Airlines	PriceFrom $496	Free Cancellation	Rating 7.3 3,940 reviews	Search Turkish Airlines flights
Air France	PriceFrom $498	Free Cancellation	Rating 7.4 1,467 reviews	Search Air France flights
KLM	PriceFrom $533	Free Cancellation	Rating 7.8 1,381 reviews	Search KLM flights
LOT	PriceFrom $570	Free Cancellation	Rating 7.6 1,107 reviews	Search LOT flights
Lufthansa	PriceFrom $588	Free Cancellation	Rating 6.8 7,317 reviews	Search Lufthansa flights
Austrian Airlines	PriceFrom $591	Free Cancellation	Rating 7.6 829 reviews	Search Austrian Airlines flights
SWISS	PriceFrom $596	Free Cancellation	Rating 7.5 1,699 reviews	Search SWISS flights
United Airlines	PriceFrom $601	Free Cancellation	Rating 7.4 8,916 reviews	Search United Airlines flights
British Airways	PriceFrom $628	Free Cancellation	Rating 6.6 7,266 reviews	Search British Airways flights
Air Serbia	PriceFrom $652	Free Cancellation	Rating 6.2 199 reviews	Search Air Serbia 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.