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$442+ Cheap flights from Chicago (CHI) to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SOF
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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The best prices from Chicago to Sofia are usually found in February or November, booked 51 days in advance, depart on a Thursday or Sunday and return on a Thursday

Cheap flight deals from Chicago to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Sofia (SOF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$534
(CrystalTravel)

One-way from

$442
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$674
Provider with most accurate pricing for Chicago (CHI)-Sofia flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Sofia flights.
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From Chicago (CHI) to Sofia
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One-way flight from Chicago (CHI) to Sofia
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Highest demand for flights based on searches. 29% potential increase in price ($337 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find flight deals from Chicago to Sofia

Cheapest flights from Chicago to Sofia
Explore the most affordable flight options available from Chicago to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This CrystalTravel deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/169:30 pmORD - SOF
1 stop16h 20mTurkish Airlines
Mon 3/249:40 pmSOF - ORD
1 stop20h 30mTurkish Airlines
Deal found 1/21$534
This FlightHub deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/69:55 pmORD - SOF
1 stop11h 55mLOT
Fri 2/212:35 pmSOF - ORD
1 stop13h 25mLOT
Deal found 1/21$540
This Mytrip deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/1611:35 amORD - SOF
2 stops28h 10mMultiple Airlines
Mon 3/2410:55 pmSOF - ORD
2 stops28h 00mMultiple Airlines
Deal found 1/21$606
This Gotogate deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/57:20 amORD - SOF
2 stops26h 30mAir Canada
Wed 3/126:00 amSOF - ORD
2 stops20h 55mAir Canada
Deal found 1/21$628
This British Airways deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/25:00 pmORD - SOF
1 stop15h 20mBritish Airways
Mon 2/175:25 pmSOF - ORD
1 stop28h 30mBritish Airways
Deal found 1/21$629
This United Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/296:00 pmORD - SOF
1 stop16h 10mUnited Airlines
Thu 2/136:10 amSOF - ORD
2 stops36h 44mUnited Airlines
Deal found 1/21$632
This Air Serbia deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2311:20 pmORD - SOF
1 stop32h 15mAir Serbia
Sun 9/144:05 pmSOF - ORD
1 stop32h 35mAir Serbia
Deal found 1/21$650
This Lufthansa deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/99:25 pmORD - SOF
1 stop12h 45mLufthansa
Mon 2/246:55 pmSOF - ORD
1 stop31h 30mLufthansa
Deal found 1/21$652
This Air France deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/51:26 pmMDW - SOF
2 stops16h 39mMultiple Airlines
Wed 2/197:00 amSOF - MDW
2 stops18h 43mMultiple Airlines
Deal found 1/21$655
This Air France deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/3012:15 pmORD - SOF
2 stops17h 40mAir France
Thu 2/137:10 amSOF - ORD
1 stop15h 55mAir France
Deal found 1/21$664
This KLM deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/612:45 pmORD - SOF
2 stops17h 20mKLM
Fri 2/217:00 amSOF - ORD
1 stop15h 30mKLM
Deal found 1/21$666
This SWISS deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/227:05 pmORD - SOF
1 stop12h 10mSWISS
Thu 2/134:00 pmSOF - ORD
1 stop32h 15mSWISS
Deal found 1/21$668

Find flights from Chicago to Sofia within your budget

Customize your flight search to find flights from Chicago to Sofia 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, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 3/16

9:30 pm-8:50 pm

1 stop16h 20m

Sofia

Mon 3/24

9:40 pm-11:10 am

1 stop20h 30m

$534

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 2/6

9:55 pm-5:50 pm

1 stop11h 55m

Sofia

Fri 2/21

2:35 pm-8:00 pm

1 stop13h 25m

$540

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 3/16

11:35 am-10:45 pm

2 stops28h 10m

Sofia

Mon 3/24

10:55 pm-7:55 pm

2 stops28h 00m

$606

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 3/5

7:20 am-5:50 pm

2 stops26h 30m

Sofia

Wed 3/12

6:00 am-7:55 pm

2 stops20h 55m

$628

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 2/2

5:00 pm-4:20 pm

1 stop15h 20m

Sofia

Mon 2/17

5:25 pm-1:55 pm

1 stop28h 30m

$629

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 1/29

6:00 pm-6:10 pm

1 stop16h 10m

Sofia

Thu 2/13

6:10 am-10:54 am

2 stops36h 44m

$632

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 2/9

9:25 pm-6:10 pm

1 stop12h 45m

Sofia

Mon 2/24

6:55 pm-6:25 pm

1 stop31h 30m

$652

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Wed 2/5

1:26 pm-2:05 pm

2 stops16h 39m

Sofia

Wed 2/19

7:00 am-5:43 pm

2 stops18h 43m

$655

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 1/31

7:05 pm-6:10 pm

2 stops15h 05m

Sofia

Mon 2/10

3:00 pm-4:15 pm

1 stop33h 15m

$662

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 1/30

12:15 pm-1:55 pm

2 stops17h 40m

Sofia

Thu 2/13

7:10 am-3:05 pm

1 stop15h 55m

$664

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 16 results
1
2

Compare providers for flights from Chicago to Sofia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to Sofia in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
oojoPrice Accuracy3 starsTrust Score*2 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
GotogatePrice Accuracy2 starsTrust Score*2 stars
FlightnetworkPrice Accuracy2 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chicago-Sofia flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Chicago-Sofia flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Chicago-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-Sofia flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-Sofia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Chicago to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Chicago with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Chicago to Sofia

Get recent, data-driven insights about flights from Chicago to Sofia including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Chicago to Sofia?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Sofia. Price data was last updated on January 17, 2025.

The price you pay for your flight from Chicago to Sofia may vary depending on when you book. For the best chance of a lower fare, look to book 51 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Chicago to Sofia?

Currently, November is the cheapest month in which you can book a flight from Chicago to Sofia (average of $632). Flying from Chicago to Sofia in June is currently the most expensive (average of $1,243). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CHI to SOF?

Find hourly flight availability from Chicago to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

It’s optimal to fly from Chicago to Sofia in the morning. By choosing this option you can save up to 31% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Chicago to Sofia?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Sofia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Chicago to Sofia flight should consider departing on Sunday mornings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Sofia by month

Plan your trip to Sofia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sofia ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Sofia when rainfall is around 1.2 in.

Temperature in Sofia by month

Plan your trip to Sofia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sofia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated January 21, 2025.
Peruse reviews from past customers who have flown with Turkish Airlines, Air Canada and United Airlines from Chicago to Sofia to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

KLM
7.8
Good
1,341 reviews
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

LOT
7.6
Good
1,117 reviews
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

SWISS
7.5
Good
1,600 reviews
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

United Airlines
7.4
Good
8,984 reviews
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Turkish Airlines
7.3
Good
3,931 reviews
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sofia from Chicago?

    Sofia (SOF) is the airport you will fly into if you book a flight from Chicago to Sofia. You should not have trouble finding flights to Sofia from Chicago; the airport handles an average of 0 inbound flights from Chicago per day. You should also have plenty of airline options to choose from since 11 airlines have flights to the Sofia airport from Chicago. It is only a 4.2 mi journey from Sofia (SOF) to Sofia’s city center.

  • What are the cheapest airlines flying from Chicago to Sofia round-trip?

    According to our current data, Turkish Airlines ($534), LOT ($540), and Air Canada ($628) offers the cheapest pricing from Chicago to Sofia. Turkish Airlines is currently priced 32% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Chicago to Sofia one-way?

    The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as $466. However, be on the lookout for offers from KLM and TAP AIR PORTUGAL, as they are both options that can get you from Chicago to Sofia for a low price.

  • Where are the most common layover locations when flying from Chicago to Sofia?

    Chicago to Sofia flights have a layover in Istanbul most often. Munich sees the next most layovers on Chicago to Sofia flights.

  • What are some popular things to do or see while on a layover in Istanbul?

    The majority of Istanbul visitors spend their time at Taksim Square, Sultan Ahmet Camii, and Beyazit Meydani. Taksim Square, Sultan Ahmet Camii, and Beyazit Meydani can be visited by traveling about 20.8 mi, 22.3 mi, and 21.7 mi respectively from Istanbul. Those on a layover in Istanbul in need of a rental car can book one at Istanbul for about $28.

  • What are some popular points of interest to see during a layover in Munich?

    Most Munich visitors opt to spend their time at Theresienwiese, Marienplatz, and Altes Rathaus. Theresienwiese, Marienplatz, and Altes Rathaus are located about 18.8 mi, 17.8 mi, and 17.8 mi, respectively from Munich Franz Josef Strauss. Those on a layover in Munich in need of a rental car can book one at Munich Franz Josef Strauss for about $48.

  • Where are the least popular layover locations for Chicago to Sofia flights?

    Chicago to Sofia flights have a layover in Frankfurt am Main least often. Frankfurt am Main is followed by Warsaw in terms of the least popular layover location on flights from Chicago to Sofia.

  • Can I find deals for flights from Chicago to Sofia that include hotel bookings?

    Yes. In addition to deals on Chicago to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Sofia.

  • Can I find deals for business class flights from Chicago to Sofia?

    Yes. Cheapflights offers flight deals from Chicago to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chicago to Sofia?

    Currently, November is the cheapest month in which you can book a flight from Chicago to Sofia (average of $632). Flying from Chicago to Sofia in June is currently the most expensive (average of $1,243). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Chicago to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Sofia flights
Midway to Sofia flights
St. Louis to Sofia flights

Top 10 airlines flying from Chicago to Sofia

Discover the top 10 airlines that operate flights from Chicago to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$495Average$719FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$568Average$919FlexibilityNo cancel feeOn-time70%
KLMCheapest$569Average$738FlexibilityNo cancel feeOn-time75%
LOTCheapest$585Average$903FlexibilityNo cancel feeOn-time81%
Austrian AirlinesCheapest$591Average$922FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$625Average$1,071FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$628Average$906FlexibilityNo cancel feeOn-time69%
ITA AirwaysCheapest$650Average$817FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$682Average$984FlexibilityNo cancel feeOn-time67%
SWISSCheapest$729Average$1,132FlexibilityNo cancel feeOn-time79%
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