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$359+ Cheap flights from Sofia (SOF) to Chicago (CHI)

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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — CHI
feb. 4 — feb. 111
mar. 2/4
mar. 2/11
1 adult, Economy
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The best prices from Sofia to Chicago are usually found in April or November, booked 77 days in advance, depart on a Thursday or Tuesday and return on a Thursday

Cheap flight deals from Sofia to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to Chicago (CHI). 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 enero 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$571
(oojo)

Popular in

July

Cheapest in

April

Average price

$774
Provider with most accurate pricing for Sofia-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Sofia-Chicago (CHI) flights.
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From Sofia to Chicago (CHI)
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($63 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($11 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 Sofia to Chicago

Cheapest flights from Sofia to Chicago
Explore the most affordable flight options available from Sofia to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 30, 2025.

This oojo deal was found by Cheapflights users on 1/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/272:25 pmSOF - ORD
1 stop13h 35mLOT
mié. 3/1210:55 pmORD - SOF
1 stop11h 55mLOT
Deal found 1/30$571
This American Airlines deal was found by Cheapflights users on 1/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/175:25 pmSOF - ORD
1 stop28h 30mAmerican Airlines
dom. 3/22:55 pmORD - SOF
2 stops17h 25mAmerican Airlines
Deal found 1/30$598
This United Airlines deal was found by Cheapflights users on 1/29. 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.
mar. 4/16:20 amSOF - ORD
2 stops16h 30mUnited Airlines
mar. 4/157:10 amORD - SOF
2 stops31h 50mUnited Airlines
Deal found 1/29$623
This Expedia deal was found by Cheapflights users on 1/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/173:00 pmSOF - ORD
1 stop33h 15mSWISS
mié. 3/268:05 pmORD - SOF
1 stop12h 10mSWISS
Deal found 1/30$629
This Expedia deal was found by Cheapflights users on 1/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/108:00 amSOF - ORD
1 stop13h 20mAustrian Airlines
jue. 4/244:20 pmORD - SOF
1 stop11h 20mAustrian Airlines
Deal found 1/30$633
This Gotogate deal was found by Cheapflights users on 1/30. 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.
lun. 2/171:45 pmSOF - ORD
1 stop12h 40mLufthansa
dom. 3/29:25 pmORD - SOF
1 stop17h 20mLufthansa
Deal found 1/30$639
This Expedia deal was found by Cheapflights users on 1/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/173:00 pmSOF - ORD
1 stop33h 15mMultiple Airlines
dom. 3/309:40 pmORD - SOF
1 stop17h 20mMultiple Airlines
Deal found 1/30$642
This Air Canada deal was found by Cheapflights users on 1/30. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/106:15 amSOF - ORD
2 stops21h 45mAir Canada
mar. 4/227:20 amORD - SOF
2 stops26h 30mAir Canada
Deal found 1/30$655
This KLM deal was found by Cheapflights users on 1/30. 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.
dom. 2/237:00 amSOF - ORD
2 stops18h 29mKLM
dom. 3/212:15 pmORD - SOF
2 stops17h 50mKLM
Deal found 1/30$663
This KLM deal was found by Cheapflights users on 1/30. 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.
jue. 2/67:00 amSOF - MDW
2 stops18h 43mKLM
sáb. 4/51:12 pmMDW - SOF
2 stops16h 48mKLM
Deal found 1/30$669
This British Airways deal was found by Cheapflights users on 1/30. 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.
lun. 2/35:25 pmSOF - ORD
1 stop28h 30mBritish Airways
mar. 2/185:00 pmORD - SOF
1 stop13h 10mBritish Airways
Deal found 1/30$689
This Turkish Airlines deal was found by Cheapflights users on 1/30. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/109:15 amSOF - ORD
1 stop16h 40mTurkish Airlines
vie. 4/257:50 pmORD - SOF
1 stop16h 35mTurkish Airlines
Deal found 1/30$707

Find flights from Sofia to Chicago within your budget

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, Cheapflights users made 2,558,603 searches. Data last updated enero 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

jue. 2/27

2:25 pm-8:00 pm

1 stop13h 35m

Chicago O'Hare Intl

mié. 3/12

10:55 pm-5:50 pm

1 stop11h 55m

$571

SofiaChicago

SOF - ORD

SOFORD

Sofia

lun. 2/17

5:25 pm-1:55 pm

1 stop28h 30m

Chicago O'Hare Intl

dom. 3/2

2:55 pm-4:20 pm

2 stops17h 25m

$598

SofiaChicago

SOF - ORD

SOFORD

Sofia

mar. 4/1

6:20 am-2:50 pm

2 stops16h 30m

Chicago O'Hare Intl

mar. 4/15

7:10 am-11:00 pm

2 stops31h 50m

$623

SofiaChicago

SOF - ORD

SOFORD

Sofia

lun. 3/17

3:00 pm-5:15 pm

1 stop33h 15m

Chicago O'Hare Intl

mié. 3/26

8:05 pm-3:15 pm

1 stop12h 10m

$629

SofiaChicago

SOF - ORD

SOFORD

Sofia

jue. 4/10

8:00 am-1:20 pm

1 stop13h 20m

Chicago O'Hare Intl

jue. 4/24

4:20 pm-11:40 am

1 stop11h 20m

$633

SofiaChicago

SOF - ORD

SOFORD

Sofia

lun. 2/17

1:45 pm-6:25 pm

1 stop12h 40m

Chicago O'Hare Intl

dom. 3/2

9:25 pm-10:45 pm

1 stop17h 20m

$639

SofiaChicago

SOF - ORD

SOFORD

Sofia

lun. 3/17

3:00 pm-5:15 pm

1 stop33h 15m

Chicago O'Hare Intl

dom. 3/30

9:40 pm-11:00 pm

1 stop17h 20m

$642

SofiaChicago

SOF - ORD

SOFORD

Sofia

jue. 4/10

6:15 am-8:00 pm

2 stops21h 45m

Chicago O'Hare Intl

mar. 4/22

7:20 am-5:50 pm

2 stops26h 30m

$655

SofiaChicago

SOF - ORD

SOFORD

Sofia

dom. 2/23

7:00 am-5:29 pm

2 stops18h 29m

Chicago O'Hare Intl

dom. 3/2

12:15 pm-2:05 pm

2 stops17h 50m

$663

SofiaChicago

SOF - ORD

SOFORD

Sofia

lun. 2/3

5:25 pm-1:55 pm

1 stop28h 30m

Chicago O'Hare Intl

mar. 2/18

5:00 pm-2:10 pm

1 stop13h 10m

$689

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

Showing 1-10 of 16 results
1
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Compare providers for flights from Sofia to Chicago

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 Sofia to Chicago in January.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
oojoPrice Accuracy3 starsTrust Score*2 stars

*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 Sofia-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sofia-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sofia-Chicago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sofia-Chicago flights, Cheapflights users trust FlightHub the most. FlightHub 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 Sofia-Chicago 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 Sofia to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Sofia 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 Sofia to Chicago

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

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

Use this chart to determine the optimal time to book a round-trip flight from Sofia to Chicago. Price data was last updated on January 24, 2025.

The best time to book flights from Sofia to Chicago is 77 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Sofia to Chicago (average of $245). Flying from Sofia to Chicago in March is currently the most expensive (average of $325). 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 SOF to CHI?

Find hourly flight availability from Sofia to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated enero 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Sofia to Chicago in the afternoon. If you’re flexible enough to do this you can expect to save up to 14% on your trip compared to booking a flight in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Sofia to Chicago. Price data was last updated on June 30, 2024.

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

Rainfall in Chicago by month

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

In terms of precipitation, rainfall in Chicago ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago when rainfall is around 1.7 in.

Temperature in Chicago by month

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

If weather is an important factor for your trip to Chicago, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated enero 30, 2025.
Read through reviews of airlines operating flights from Sofia to Chicago, such as KLM, LOT and Qatar Airways. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,335 reviews

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

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
1,335 reviews
KLM
7.8
Good
1,335 reviews

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

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
1,097 reviews
KLM
7.8
Good
1,335 reviews

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

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.

Qatar Airways
7.5
Good
3,715 reviews
KLM
7.8
Good
1,335 reviews

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

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.

Austrian Airlines
7.5
Good
786 reviews
KLM
7.8
Good
1,335 reviews

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

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
1,584 reviews
KLM
7.8
Good
1,335 reviews

Food

7.3

Overall

7.8

Crew

8.4

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

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 Sofia to Chicago. 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 from for flights from Sofia to Chicago?

    Most people fly from Sofia (SOF) if they book a flight from Sofia to Chicago. On average, Sofia has 0 outbound flights to Chicago per day from 8 airlines. Sofia is conveniently located just 4.2 mi from Sofia’s city center.

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

    Currently priced at $571, LOT will fly you from Sofia to Chicago and back. In addition to LOT, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and KLM - these airlines can fly you to your destination from $594 and $614, respectively. LOT is priced at 19% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Sofia to Chicago 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 Sofia to Chicago?

    Currently, August is the cheapest month in which you can book a flight from Sofia to Chicago (average of $245). Flying from Sofia to Chicago in March is currently the most expensive (average of $325). 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.

See more FAQs

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Merrillville
New Buffalo
Hammond
Benton Harbor
Porter
Lansing
Valparaiso
Chesterton

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Sofia to Chicago

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

Top 8 airlines flying from Sofia to Chicago

Discover the top 8 airlines that operate flights from Sofia to Chicago. 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 enero 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$460Average$807FlexibilityNo cancel feeOn-time75%
LOTCheapest$518Average$631FlexibilityNo cancel feeOn-time81%
British AirwaysCheapest$546Average$795FlexibilityNo cancel feeOn-time70%
Austrian AirlinesCheapest$576Average$774FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$585Average$785FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$603Average$768FlexibilityNo cancel feeOn-time69%
ITA AirwaysCheapest$631Average$688FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$641Average$729FlexibilityNo cancel feeOn-time77%
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