Which airport is the most popular layover for flights between Sofia and Chicago?

Warsaw (WAW) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Sofia to Chicago?

Flights via London (LHR) offer the lowest average round-trip price of $629.

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

KLM is the most popular carrier operating from Sofia to Chicago

What airlines fly to Chicago?

LOT, Lufthansa and United Airlines are the top three most popular airlines that fly to Chicago from Sofia according to our data. LOT is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 8 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Sofia to Chicago?

Zurich (ZRH) has the shortest average layover time for this route: 0h 48m.

Which layover airport has the shortest travel time from Sofia to Chicago?

Flights connecting via Zurich (ZRH) have the shortest average one-way travel time: 13h 05m.

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

Prices for flights from Sofia Airport to Chicago are updated daily.

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

There are 8 operators available for flights from Sofia Airport to Chicago as of December 2025.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sofia Airport to Chicago.

What documentation or ID do you need to fly to Chicago?

The travel and health documents you'll need for your trip to Chicago may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$352 Cheap Flights from Sofia to Chicago in 2025/26

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Find the cheapest flights from Sofia to Chicago

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:35 pm - 9:00 pm

SOF

ORD

33h 25m1 stop

9:50 pm - 2:00 am

ORD

SOF

20h 10m1 stop

$676LOT

mar., mar. 10 - lun., jun. 15

6:35 pm - 7:55 pm

SOF

ORD

33h 20m2 stops

9:55 pm - 5:50 pm

ORD

SOF

35h 55m2 stops

$684LOT

dom., ene. 25 - dom., feb. 1

7:00 am - 3:10 pm

SOF

ORD

16h 10m1 stop

5:20 pm - 1:55 pm

ORD

SOF

12h 35m1 stop

$687Air France

dom., ene. 25 - dom., feb. 1

5:20 am - 3:10 pm

SOF

ORD

41h 50m2 stops

5:10 pm - 1:55 pm

ORD

SOF

36h 45m2 stops

$688LOT

sáb., may. 9 - jue., ago. 13

6:35 pm - 8:00 pm

SOF

ORD

33h 25m1 stop

9:55 pm - 5:50 pm

ORD

SOF

11h 55m1 stop

$691LOT

mar., dic. 23 - lun., ene. 26

5:00 am - 5:20 pm

SOF

ORD

20h 20m3 stops

6:30 pm - 8:50 am

ORD

SOF

30h 20m3 stops

$692Multiple Airlines

jue., ene. 15 - mié., ene. 28

7:00 am - 6:49 pm

SOF

ORD

19h 49m2 stops

4:50 pm - 2:00 pm

ORD

SOF

13h 10m1 stop

$696KLM

jue., feb. 5 - mié., abr. 1

7:00 am - 6:32 pm

SOF

MDW

19h 32m2 stops

1:49 pm - 2:05 pm

MDW

SOF

16h 16m2 stops

$696Multiple Airlines

jue., ene. 15 - mié., ene. 28

2:35 pm - 9:00 pm

SOF

ORD

13h 25m1 stop

9:50 pm - 1:55 pm

ORD

SOF

32h 05m1 stop

$697LOT

mié., mar. 25 - mar., jul. 21

7:00 am - 5:55 pm

SOF

ORD

18h 55m2 stops

11:15 am - 2:00 pm

ORD

SOF

18h 45m2 stops

$700KLM

jue., feb. 5 - mié., abr. 1

LOT flights from Sofia to Chicago

Our best LOT deals on Sofia to Chicago flight tickets

LOT

Mar 10

SOF6:35 pmSofia

33h 25m

1 stop

ORD9:00 pmChicago O'Hare Intl

Jun 15

ORD9:50 pmChicago O'Hare Intl

20h 10m

1 stop

SOF2:00 amSofia

$676

Find similar

LOT

Jan 25

SOF6:35 pmSofia

33h 20m

2 stops

ORD7:55 pmChicago O'Hare Intl

Feb 1

ORD9:55 pmChicago O'Hare Intl

35h 55m

2 stops

SOF5:50 pmSofia

$684

Find similar

LOT

May 9

SOF5:20 amSofia

41h 50m

2 stops

ORD3:10 pmChicago O'Hare Intl

Aug 13

ORD5:10 pmChicago O'Hare Intl

36h 45m

2 stops

SOF1:55 pmSofia

$688

Find similar

Air France flights from Sofia to Chicago

Our best Air France deals on Sofia to Chicago flight tickets

Air France

Jan 25

SOF7:00 amSofia

16h 10m

1 stop

ORD3:10 pmChicago O'Hare Intl

Feb 1

ORD5:20 pmChicago O'Hare Intl

12h 35m

1 stop

SOF1:55 pmSofia

$687

Find similar

Air France

Dec 17

SOF7:00 amSofia

18h 46m

2 stops

ORD5:46 pmChicago O'Hare Intl

Jan 17

ORD11:25 amChicago O'Hare Intl

18h 30m

2 stops

SOF1:55 pmSofia

$804

Find similar

Air France

Dec 17

SOF7:00 amSofia

18h 46m

2 stops

ORD5:46 pmChicago O'Hare Intl

Jan 17

ORD11:25 amChicago O'Hare Intl

18h 30m

2 stops

SOF1:55 pmSofia

$810

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

mar. 3/10

6:35 pm-9:00 pm

1 stop33h 25m

Chicago O'Hare Intl

lun. 6/15

9:50 pm-2:00 am

1 stop20h 10m

$676

SofiaChicago

SOF - ORD

SOFORD

Sofia

dom. 1/25

6:35 pm-7:55 pm

2 stops33h 20m

Chicago O'Hare Intl

dom. 2/1

9:55 pm-5:50 pm

2 stops35h 55m

$684

SofiaChicago

SOF - ORD

SOFORD

Sofia

dom. 1/25

7:00 am-3:10 pm

1 stop16h 10m

Chicago O'Hare Intl

dom. 2/1

5:20 pm-1:55 pm

1 stop12h 35m

$687

SofiaChicago

SOF - ORD

SOFORD

Sofia

sáb. 5/9

5:20 am-3:10 pm

2 stops41h 50m

Chicago O'Hare Intl

jue. 8/13

5:10 pm-1:55 pm

2 stops36h 45m

$688

SofiaChicago

SOF - ORD

SOFORD

Sofia

mar. 12/23

6:35 pm-8:00 pm

1 stop33h 25m

Chicago O'Hare Intl

lun. 1/26

9:55 pm-5:50 pm

1 stop11h 55m

$691

SofiaChicago

SOF - ORD

SOFORD

Sofia

jue. 1/15

5:00 am-5:20 pm

3 stops20h 20m

Chicago O'Hare Intl

mié. 1/28

6:30 pm-8:50 am

3 stops30h 20m

$692

SofiaChicago

SOF - ORD

SOFORD

Sofia

jue. 2/5

7:00 am-6:49 pm

2 stops19h 49m

Chicago O'Hare Intl

mié. 4/1

4:50 pm-2:00 pm

1 stop13h 10m

$696

SofiaChicago

SOF - MDW

SOFMDW

Sofia

jue. 1/15

7:00 am-6:32 pm

2 stops19h 32m

Chicago Midway

mié. 1/28

1:49 pm-2:05 pm

2 stops16h 16m

$696

SofiaChicago

SOF - ORD

SOFORD

Sofia

mié. 3/25

2:35 pm-9:00 pm

1 stop13h 25m

Chicago O'Hare Intl

mar. 7/21

9:50 pm-1:55 pm

1 stop32h 05m

$697

SofiaChicago

SOF - ORD

SOFORD

Sofia

jue. 2/5

7:00 am-5:55 pm

2 stops18h 55m

Chicago O'Hare Intl

mié. 4/1

11:15 am-2:00 pm

2 stops18h 45m

$700

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 Chicago

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

Layovers

What is the cheapest month to fly to Chicago?

The month of February is, on average, the cheapest month to fly to Chicago from Sofia, with most prices found around $674. If you’re not able to fly to Chicago in February, then April is your next best option. Flight prices from Sofia to Chicago during April average around $679.

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

The cheapest day to depart on your flight to Chicago is on a Thursday when prices can be found for as low as $666. This is often the case because there is less demand to fly during this day of the week. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Sofia to Chicago for around $785.

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

Our most recent data shows that the best time of day to fly to Chicago is in the afternoon. Flights from Sofia to Chicago during this time can be as low as $666. In contrast, the most expensive time of day to depart to Chicago is in the evening when prices are around $768.

How far in advance should I book a flight to Chicago?

You are more likely to see cheaper flights to Chicago from Sofia when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $724 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Sofia for as low as $631 on momondo.

How have Sofia to Chicago flight prices changed over time?

As of December 2025, prices for Sofia to Chicago flights are approximately 23% more expensive when compared to flights at the same time last year.

When to book flights from Sofia to Chicago

Are you open to changing your travel dates? Check out the ideal times to fly from Sofia to Chicago according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Sofia to Chicago (SOF to CHI) flight deals and tips

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

Fastest flight time	15h 20m
Direct flights	None

The fastest flight from Sofia to Chicago takes 15h 20m

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

Search flight deals

How far is Sofia to Chicago by plane?
A flight from Sofia to Chicago will travel around 5185.9 mi. 15h 20m is a normal flight duration for this route.
When did momondo last update prices for flights from Sofia Airport to Chicago?
Prices for flights from Sofia Airport to Chicago are updated daily.
How many operators does momondo search for flights from Sofia Airport to Chicago?
There are 8 operators available for flights from Sofia Airport to Chicago as of December 2025.
How old do you have to be to fly from Sofia Airport to Chicago?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sofia Airport to Chicago.
What documentation or ID do you need to fly to Chicago?
The travel and health documents you'll need for your trip to Chicago may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Sofia to Chicago?
Based on momondo bookings for flights between Sofia and Chicago, the leading airline is Lufthansa, making up 28% of the total bookings. Other popular airlines include LOT with 27%, United Airlines with 14%, and Turkish Airlines with 14%.

Best airlines flying from Sofia to Chicago

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

Airline	Rating	Free Cancellation	Price
LOT	PriceFrom $532	Free Cancellation	Rating 7.6 1,146 reviews	Search LOT flights
British Airways	PriceFrom $546	Free Cancellation	Rating 6.7 7,574 reviews	Search British Airways flights
Air France	PriceFrom $560	Free Cancellation	Rating 7.4 1,504 reviews	Search Air France flights
KLM	PriceFrom $607	Free Cancellation	Rating 7.7 1,434 reviews	Search KLM flights
Turkish Airlines	PriceFrom $625	Free Cancellation	Rating 7.3 4,092 reviews	Search Turkish Airlines flights
Lufthansa	PriceFrom $639	Free Cancellation	Rating 6.8 7,626 reviews	Search Lufthansa flights
United Airlines	PriceFrom $643	Free Cancellation	Rating 7.4 9,094 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $654	Free Cancellation	Rating 7.6 879 reviews	Search Austrian Airlines flights

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New Buffalo

Hammond

Benton Harbor

Saint Joseph

Portage

Lansing

Schererville

Valparaiso

Crown Point

Munster

Chesterton

Monticello

Porter

Griffith

Saint John

Why use momondo?

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

Finding the right flight to Chicago 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 Chicago quick and easy, saving you time and money.

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

All flight searches from Sofia to Chicago on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Sofia to Chicago flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Sofia to Chicago right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Chicago, momondo offers a useful price alert feature which will track prices for flights to Chicago from Sofia and alert you when they change.