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Cheap flights from Sofia to Chicago from $341

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sofia to Chicago departing on 4/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Sofia to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
LOT Logo
6:45 pm - 3:10 pm
SOF
-
ORD
52h 25m
2 stops
LOT Logo
5:10 pm - 6:00 pm
ORD
-
SOF
16h 50m
2 stops
$659LOT
Sat, Jul 11 - Fri, Aug 28
LOT Logo
6:45 pm - 7:50 pm
SOF
-
ORD
33h 05m
1 stop
LOT Logo
9:50 pm - 1:55 am
ORD
-
SOF
20h 05m
1 stop
$666LOT
Mon, Apr 20 - Tue, Sep 8
LOT Logo
6:45 pm - 7:50 pm
SOF
-
ORD
33h 05m
1 stop
LOT Logo
9:50 pm - 1:45 am
ORD
-
SOF
19h 55m
1 stop
$670LOT
Sun, Jun 7 - Wed, Jul 15
LOT Logo
5:25 am - 7:50 pm
SOF
-
ORD
22h 25m
2 stops
LOT Logo
9:50 pm - 1:50 pm
ORD
-
SOF
32h 00m
1 stop
$674LOT
Fri, Apr 24 - Sat, May 2
LOT Logo
6:45 pm - 7:50 pm
SOF
-
ORD
33h 05m
1 stop
LOT Logo
5:10 pm - 1:55 am
ORD
-
SOF
24h 45m
2 stops
$679LOT
Mon, Apr 20 - Tue, Sep 8
LOT Logo
5:25 am - 7:50 pm
SOF
-
ORD
22h 25m
1 stop
LOT Logo
9:50 pm - 1:55 am
ORD
-
SOF
20h 05m
1 stop
$680LOT
Thu, May 28 - Mon, Aug 3
KLM Logo
7:00 am - 6:33 pm
SOF
-
MDW
19h 33m
2 stops
KLM Logo
1:05 pm - 2:00 pm
MDW
-
SOF
16h 55m
2 stops
$887KLM
Tue, May 26 - Sat, Oct 10
KLM Logo
7:00 am - 5:58 pm
SOF
-
MDW
18h 58m
2 stops
KLM Logo
1:24 pm - 2:00 pm
MDW
-
SOF
16h 36m
2 stops
$936KLM
Sun, Apr 19 - Sun, Apr 26
KLM Logo
7:00 am - 5:54 pm
SOF
-
MDW
18h 54m
2 stops
KLM Logo
1:00 pm - 2:00 pm
MDW
-
SOF
17h 00m
2 stops
$1,070KLM
Fri, Apr 3 - Sat, Jun 20
Multiple Airlines Logo
7:00 am - 5:56 pm
SOF
-
MDW
18h 56m
2 stops
Multiple Airlines Logo
1:59 pm - 2:00 pm
MDW
-
SOF
16h 01m
2 stops
$1,159Multiple Airlines
Thu, May 14 - Sun, May 24

LOT flights from Sofia to Chicago

Our best LOT deals on Sofia to Chicago flight tickets
LOT
Jul 11
SOF6:45 pmSofia
52h 25m
2 stops
ORD3:10 pmChicago O'Hare Intl
Aug 28
ORD5:10 pmChicago O'Hare Intl
16h 50m
2 stops
SOF6:00 pmSofia
$659
LOT
Apr 20
SOF6:45 pmSofia
33h 05m
1 stop
ORD7:50 pmChicago O'Hare Intl
Sep 8
ORD9:50 pmChicago O'Hare Intl
20h 05m
1 stop
SOF1:55 amSofia
$666
LOT
Jun 7
SOF6:45 pmSofia
33h 05m
1 stop
ORD7:50 pmChicago O'Hare Intl
Jul 15
ORD9:50 pmChicago O'Hare Intl
19h 55m
1 stop
SOF1:45 amSofia
$670

United Airlines flights from Sofia to Chicago

Our best United Airlines deals on Sofia to Chicago flight tickets
United Airlines
Apr 1
SOF6:20 amSofia
14h 35m
1 stop
ORD12:55 pmChicago O'Hare Intl
Jun 23
ORD11:03 amChicago O'Hare Intl
17h 07m
2 stops
SOF12:10 pmSofia
$709
United Airlines
Apr 1
SOF6:20 amSofia
14h 35m
1 stop
ORD12:55 pmChicago O'Hare Intl
Jun 17
ORD3:10 pmChicago O'Hare Intl
14h 15m
1 stop
SOF1:25 pmSofia
$710
United Airlines
May 14
SOF6:30 amSofia
14h 25m
1 stop
ORD12:55 pmChicago O'Hare Intl
May 25
ORD3:10 pmChicago O'Hare Intl
18h 50m
1 stop
SOF6:00 pmSofia
$711

momondo Fare Finder

 
Customize your flight search to find flights from Sofia to Chicago that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 6, 2026.
Use the filters below to find and compare flights from Sofia to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 7/11

6:45 pm-3:10 pm

2 stops52h 25m

Chicago O'Hare Intl

Fri 8/28

5:10 pm-6:00 pm

2 stops16h 50m

$659

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 4/20

6:45 pm-7:50 pm

1 stop33h 05m

Chicago O'Hare Intl

Tue 9/8

9:50 pm-1:55 am

1 stop20h 05m

$666

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 6/7

6:45 pm-7:50 pm

1 stop33h 05m

Chicago O'Hare Intl

Wed 7/15

9:50 pm-1:45 am

1 stop19h 55m

$670

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 4/24

5:25 am-7:50 pm

2 stops22h 25m

Chicago O'Hare Intl

Sat 5/2

9:50 pm-1:50 pm

1 stop32h 00m

$674

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 4/20

6:45 pm-7:50 pm

1 stop33h 05m

Chicago O'Hare Intl

Tue 9/8

5:10 pm-1:55 am

2 stops24h 45m

$679

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 5/28

5:25 am-7:50 pm

1 stop22h 25m

Chicago O'Hare Intl

Mon 8/3

9:50 pm-1:55 am

1 stop20h 05m

$680

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Tue 5/26

7:00 am-6:33 pm

2 stops19h 33m

Chicago Midway

Sat 10/10

1:05 pm-2:00 pm

2 stops16h 55m

$887

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Sun 4/19

7:00 am-5:58 pm

2 stops18h 58m

Chicago Midway

Sun 4/26

1:24 pm-2:00 pm

2 stops16h 36m

$936

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Fri 4/3

7:00 am-5:54 pm

2 stops18h 54m

Chicago Midway

Sat 6/20

1:00 pm-2:00 pm

2 stops17h 00m

$1,070
Quickest round-trip

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Thu 5/14

7:00 am-5:56 pm

2 stops18h 56m

Chicago Midway

Sun 5/24

1:59 pm-2:00 pm

2 stops16h 01m

$1,159

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chicago from

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

What is the cheapest month to fly to Chicago?

The month of April is, on average, the cheapest month to fly to Chicago from Sofia, with most prices found around $679. If you’re not able to fly to Chicago in April, then February is your next best option. Flight prices from Sofia to Chicago during February average around $690.

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 $743 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 $667 on momondo.

How have Sofia to Chicago flight prices changed over time?

As of March 2026, prices for Sofia to Chicago flights are approximately 39% 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

13h 15m

Direct flights

None
The fastest flight from Sofia to Chicago takes 13h 15m
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. 13h 15m 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?

  • 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?

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
LOTPriceFrom $614Free CancellationRating
7.5
1,182 reviews
Search LOT flights
KLMPriceFrom $621Free CancellationRating
7.7
1,465 reviews
Search KLM flights
Turkish AirlinesPriceFrom $625Free CancellationRating
7.3
4,244 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $651Free CancellationRating
7.4
9,396 reviews
Search United Airlines flights
Austrian AirlinesPriceFrom $658Free CancellationRating
7.6
900 reviews
Search Austrian Airlines flights
LufthansaPriceFrom $669Free CancellationRating
6.8
7,828 reviews
Search Lufthansa flights

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
New Buffalo
Hammond
Benton Harbor
Saint Joseph
Portage
Lansing
Valparaiso
Schererville
Munster
Crown Point
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.

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Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 78.5 mi from Chicago
Chicago Midway Airport
Chicago O'Hare Intl Airport
Chicago Greater Rockford Airport