Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Sofia to Chicago from $343

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 11/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

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

Trusted and free

Trusted and free

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

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Sofia to Chicago

Cheap round-trip flights

American Airlines Logo
12:05 pm - 6:45 pmSOF-ORD
14h 40m1 stop
American Airlines Logo
6:35 pm - 1:00 pmORD-SOF
34h 25m2 stops
$636American Airlines
Find Deal
Sat, Nov 8 - Fri, Nov 21
LOT Logo
2:35 pm - 3:10 pmSOF-ORD
32h 35m1 stop
LOT Logo
10:55 pm - 5:50 pmORD-SOF
11h 55m1 stop
$637LOT
Find Deal
Wed, Oct 15 - Wed, Oct 29
Multiple Airlines Logo
7:00 am - 2:40 pmSOF-ORD
15h 40m1 stop
Multiple Airlines Logo
5:10 pm - 2:00 pmORD-SOF
12h 50m1 stop
$644Multiple Airlines
Find Deal
Mon, Oct 6 - Sun, Oct 19
Multiple Airlines Logo
7:00 am - 2:10 pmSOF-ORD
15h 10m1 stop
Multiple Airlines Logo
5:20 pm - 1:55 pmORD-SOF
12h 35m1 stop
$645Multiple Airlines
Find Deal
Tue, Oct 14 - Fri, Nov 14
Air France Logo
7:00 am - 3:00 pmSOF-ORD
16h 00m1 stop
Air France Logo
5:20 pm - 1:55 pmORD-SOF
12h 35m1 stop
$650Air France
Find Deal
Fri, Sep 26 - Sat, Nov 29
Air France Logo
7:00 am - 3:00 pmSOF-ORD
16h 00m1 stop
Air France Logo
1:29 pm - 1:55 pmORD-SOF
16h 26m2 stops
$655Air France
Find Deal
Fri, Sep 26 - Fri, Nov 28
KLM Logo
7:00 am - 4:20 pmSOF-ORD
17h 20m2 stops
KLM Logo
1:23 pm - 2:05 pmORD-SOF
16h 42m2 stops
$665KLM
Find Deal
Wed, Oct 1 - Thu, Dec 11
United Airlines Logo
6:00 am - 12:10 pmSOF-ORD
13h 10m1 stop
United Airlines Logo
11:15 am - 12:00 pmORD-SOF
16h 45m2 stops
$704United Airlines
Find Deal
Tue, Oct 28 - Tue, Apr 7
United Airlines Logo
6:15 am - 2:55 pmSOF-ORD
16h 40m1 stop
United Airlines Logo
9:50 pm - 6:20 pmORD-SOF
12h 30m1 stop
$705United Airlines
Find Deal
Wed, Oct 1 - Sun, Jan 11
KLM Logo
7:00 am - 4:20 pmSOF-ORD
17h 20m2 stops
KLM Logo
4:20 pm - 2:00 pmORD-SOF
13h 40m1 stop
$731KLM
Find Deal
Wed, Oct 1 - Fri, Apr 3

KLM flights from Sofia to Chicago

Our best KLM deals on Sofia to Chicago flight tickets
KLM
Sep 24
SOF7:00 amSofia
15h 40m
1 stop
ORD2:40 pmChicago O'Hare Intl
Oct 3
ORD4:15 pmChicago O'Hare Intl
13h 45m
1 stop
SOF2:00 pmSofia
$651
Find similar
KLM
Oct 1
SOF7:00 amSofia
17h 20m
2 stops
ORD4:20 pmChicago O'Hare Intl
Dec 11
ORD1:23 pmChicago O'Hare Intl
16h 42m
2 stops
SOF2:05 pmSofia
$665
Find similar
KLM
Oct 1
SOF7:00 amSofia
17h 20m
2 stops
ORD4:20 pmChicago O'Hare Intl
Apr 3
ORD4:20 pmChicago O'Hare Intl
13h 40m
1 stop
SOF2:00 pmSofia
$731
Find similar

LOT flights from Sofia to Chicago

Our best LOT deals on Sofia to Chicago flight tickets
LOT
Sep 30
SOF6:40 pmSofia
33h 00m
1 stop
ORD7:40 pmChicago O'Hare Intl
Jan 9
ORD9:55 pmChicago O'Hare Intl
31h 55m
1 stop
SOF1:50 pmSofia
$637
Find similar
LOT
Oct 1
SOF6:40 pmSofia
28h 30m
1 stop
ORD3:10 pmChicago O'Hare Intl
Jan 9
ORD9:55 pmChicago O'Hare Intl
11h 55m
1 stop
SOF5:50 pmSofia
$640
Find similar
LOT
Sep 30
SOF6:40 pmSofia
33h 00m
1 stop
ORD7:40 pmChicago O'Hare Intl
Jan 7
ORD9:55 pmChicago O'Hare Intl
11h 55m
1 stop
SOF5:50 pmSofia
$676
Find similar

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 September 16, 2025.
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

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 11/8

12:05 pm-6:45 pm

1 stop14h 40m

Chicago O'Hare Intl

Fri 11/21

6:35 pm-1:00 pm

2 stops34h 25m

$636

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 10/15

2:35 pm-3:10 pm

1 stop32h 35m

Chicago O'Hare Intl

Wed 10/29

10:55 pm-5:50 pm

1 stop11h 55m

$637

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 10/6

7:00 am-2:40 pm

1 stop15h 40m

Chicago O'Hare Intl

Sun 10/19

5:10 pm-2:00 pm

1 stop12h 50m

$644

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 10/14

7:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

Fri 11/14

5:20 pm-1:55 pm

1 stop12h 35m

$645

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 9/26

7:00 am-3:00 pm

1 stop16h 00m

Chicago O'Hare Intl

Sat 11/29

5:20 pm-1:55 pm

1 stop12h 35m

$650

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 9/26

7:00 am-3:00 pm

1 stop16h 00m

Chicago O'Hare Intl

Fri 11/28

1:29 pm-1:55 pm

2 stops16h 26m

$655

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 10/1

7:00 am-4:20 pm

2 stops17h 20m

Chicago O'Hare Intl

Thu 12/11

1:23 pm-2:05 pm

2 stops16h 42m

$665

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 10/28

6:00 am-12:10 pm

1 stop13h 10m

Chicago O'Hare Intl

Tue 4/7

11:15 am-12:00 pm

2 stops16h 45m

$704

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 10/1

6:15 am-2:55 pm

1 stop16h 40m

Chicago O'Hare Intl

Sun 1/11

9:50 pm-6:20 pm

1 stop12h 30m

$705

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 10/1

7:00 am-4:20 pm

2 stops17h 20m

Chicago O'Hare Intl

Fri 4/3

4:20 pm-2:00 pm

1 stop13h 40m

$731

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 typical price of a round-trip flight between Sofia and Chicago?

What is the cheapest month to fly to Chicago?

The month of November is, on average, the cheapest month to fly to Chicago from Sofia, with most prices found around $648. If you’re not able to fly to Chicago in November, then October is your next best option. Flight prices from Sofia to Chicago during October average around $659.

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 $704 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 $625 on momondo.

How have Sofia to Chicago flight prices changed over time?

As of September 2025, prices for Sofia to Chicago flights are approximately 2% cheaper 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

Direct flights

None
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 05m 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
KLMPriceFrom $460Free CancellationRating
7.8
1,386 reviews
Search KLM flights
LOTPriceFrom $533Free CancellationRating
7.6
1,114 reviews
Search LOT flights
British AirwaysPriceFrom $546Free CancellationRating
6.7
7,363 reviews
Search British Airways flights
Austrian AirlinesPriceFrom $577Free CancellationRating
7.6
850 reviews
Search Austrian Airlines flights
United AirlinesPriceFrom $603Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
LufthansaPriceFrom $613Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
Turkish AirlinesPriceFrom $625Free CancellationRating
7.3
3,968 reviews
Search Turkish Airlines 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
Lansing
Portage
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.

An easier way to manage your Chicago trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 10/16
Thu 10/23
By creating a price alert you accept our terms of use and privacy policy.

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