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$267+ Cheap flights from O'Hare Intl (ORD) 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SOF
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago O'Hare Intl to Sofia are usually found in November or February, booked 64 days in advance, depart on a Thursday or Sunday and return on a Wednesday

Cheap flight deals from O'Hare Intl to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) 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 June 18, 2025.

Round-trip from

$654
(KLM)

One-way from

$267
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,178
From Chicago O'Hare Intl to Sofia
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One-way flight from Chicago O'Hare Intl to Sofia
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Highest demand for flights based on searches. 27% potential increase in price ($300 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from O'Hare Intl to Sofia

Cheapest flights from O'Hare Intl to Sofia
Explore the most affordable flight options available from O'Hare Intl to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 18, 2025.

This KLM deal was found by Cheapflights users on 6/17. 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.
Mon 7/212:00 pmORD - SOF
2 stops16h 00mMultiple Airlines
Mon 3/97:00 amSOF - ORD
1 stop16h 10mMultiple Airlines
Deal found 6/17$654
This Austrian Airlines deal was found by Cheapflights users on 6/16. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/64:20 pmORD - SOF
1 stop15h 00mAustrian Airlines
Fri 11/216:45 pmSOF - ORD
2 stops31h 45mAustrian Airlines
Deal found 6/16$656
This Air Canada deal was found by Cheapflights users on 6/17. 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.
Sat 7/129:14 pmORD - SOF
2 stops54h 46mAir Canada
Thu 10/26:15 amSOF - ORD
2 stops16h 40mAir Canada
Deal found 6/17$658
This SWISS deal was found by Cheapflights users on 6/16. 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.
Sun 8/107:05 pmORD - SOF
2 stops32h 55mSWISS
Sun 9/712:45 pmSOF - ORD
2 stops35h 10mSWISS
Deal found 6/16$660
This Lufthansa deal was found by Cheapflights users on 6/16. 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.
Mon 7/79:40 pmORD - SOF
1 stop17h 20mLufthansa
Fri 9/266:15 amSOF - ORD
1 stop14h 40mLufthansa
Deal found 6/16$661
This Air Serbia deal was found by Cheapflights users on 6/16. 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.
Mon 8/46:50 pmORD - SOF
1 stop12h 45mAir Serbia
Wed 3/114:00 pmSOF - ORD
1 stop13h 10mAir Serbia
Deal found 6/16$666
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Sun 7/279:55 amORD - SOF
2 stops29h 05mUnited Airlines
Wed 8/136:15 amSOF - ORD
2 stops24h 24mUnited Airlines
Deal found 6/17$668
This British Airways deal was found by Cheapflights users on 6/16. 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 8/37:15 pmORD - SOF
1 stop15h 55mBritish Airways
Mon 3/95:25 pmSOF - ORD
1 stop28h 30mBritish Airways
Deal found 6/16$673
This KLM deal was found by Cheapflights users on 6/16. 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.
Mon 7/212:00 pmORD - SOF
2 stops16h 00mKLM
Mon 3/97:00 amSOF - ORD
2 stops17h 50mKLM
Deal found 6/16$678
This ITA Airways deal was found by Cheapflights users on 6/17. 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 ITA Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/123:00 pmORD - SOF
1 stop18h 10mITA Airways
Sun 8/176:00 pmSOF - ORD
1 stop27h 10mITA Airways
Deal found 6/17$692

Cheapflights Fare Finder

Customize your flight search to find flights from O'Hare Intl 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 June 18, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Sofia that are best for you.

Fly from

O'Hare Intl

Fly to

Sofia

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 7/21

2:00 pm-2:00 pm

2 stops16h 00m

Sofia

Mon 3/9

7:00 am-4:10 pm

1 stop16h 10m

$654

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 9/6

4:20 pm-3:20 pm

1 stop15h 00m

Sofia

Fri 11/21

6:45 pm-6:30 pm

2 stops31h 45m

$656

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 7/12

9:14 pm-12:00 pm

2 stops54h 46m

Sofia

Thu 10/2

6:15 am-2:55 pm

2 stops16h 40m

$658

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 8/10

7:05 pm-12:00 pm

2 stops32h 55m

Sofia

Sun 9/7

12:45 pm-3:55 pm

2 stops35h 10m

$660

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 7/7

9:40 pm-11:00 pm

1 stop17h 20m

Sofia

Fri 9/26

6:15 am-12:55 pm

1 stop14h 40m

$661

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 8/4

6:50 pm-3:35 pm

1 stop12h 45m

Sofia

Wed 3/11

4:00 pm-10:10 pm

1 stop13h 10m

$666

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 7/27

9:55 am-11:00 pm

2 stops29h 05m

Sofia

Wed 8/13

6:15 am-10:39 pm

2 stops24h 24m

$668

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 8/3

7:15 pm-7:10 pm

1 stop15h 55m

Sofia

Mon 3/9

5:25 pm-2:55 pm

1 stop28h 30m

$673

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 7/21

2:00 pm-2:00 pm

2 stops16h 00m

Sofia

Mon 3/9

7:00 am-5:50 pm

2 stops17h 50m

$678

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 7/12

3:00 pm-5:10 pm

1 stop18h 10m

Sofia

Sun 8/17

6:00 pm-1:10 pm

1 stop27h 10m

$692

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/17

Showing 1-10 of 19 results
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Best time to book a flight from O'Hare Intl to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from O'Hare Intl 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.

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to Sofia

How far ahead should I book a flight from Chicago O'Hare Intl Airport to Sofia?

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Sofia. Price data was last updated on June 13, 2025.

The best time to book flights from Chicago O'Hare Intl Airport to Sofia is 64 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 Chicago O'Hare Intl Airport to Sofia?

Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sofia (average of $632). Flying from Chicago O'Hare Intl Airport to Sofia in June is currently the most expensive (average of $1,201). 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 ORD to SOF?

Find hourly flight availability from O'Hare Intl 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 June 18, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 33% on flights from Chicago O'Hare Intl Airport to Sofia by exploring options for tickets in the morning.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to Sofia?

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

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Sofia flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday 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 June 18, 2025.
Read reviews from past customers who have flown KLM, Austrian Airlines and Air France from Chicago to Sofia. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,363 reviews

Boarding

7.8

Crew

8.4

Comfort

7.7

Food

7.2

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,363 reviews
KLM
7.8
Good
1,363 reviews

Boarding

7.8

Crew

8.4

Comfort

7.7

Food

7.2

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Austrian Airlines
7.6
Good
804 reviews
KLM
7.8
Good
1,363 reviews

Boarding

7.8

Crew

8.4

Comfort

7.7

Food

7.2

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Air France
7.5
Good
1,466 reviews
KLM
7.8
Good
1,363 reviews

Boarding

7.8

Crew

8.4

Comfort

7.7

Food

7.2

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
SWISS
7.5
Good
1,632 reviews
KLM
7.8
Good
1,363 reviews

Boarding

7.8

Crew

8.4

Comfort

7.7

Food

7.2

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,810 reviews
KLM
7.8
Good
1,363 reviews

Boarding

7.8

Crew

8.4

Comfort

7.7

Food

7.2

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl 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 O'Hare Intl?

    Sofia (SOF) is the airport you will fly into if you book a flight from Chicago O'Hare Intl to Sofia. You should not have trouble finding flights to Sofia from Chicago O'Hare Intl; the airport handles an average of 0 inbound flights from Chicago O'Hare Intl per day. You should also have plenty of airline options to choose from since 10 airlines have flights to the Sofia airport from Chicago O'Hare Intl. It is only a 4.2 mi journey from Sofia (SOF) to Sofia’s city center.

  • What are the cheapest airlines flying from Chicago O'Hare Intl Airport to Sofia round-trip?

    Our cheapest airline available from Chicago O'Hare Intl Airport to Sofia is Austrian Airlines. Our recent data shows that you can find tickets from as low as $656 on this airline. Additional options worth looking into are Air Canada and SWISS, starting at $658 and $660 round-trip. You may be able to fly from Chicago O'Hare Intl Airport to Sofia for 16% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to Sofia one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at $326. ITA Airways flights start at $333 while deals on SWISS start at $344 one-way.

  • Where are the most common layover locations when flying from Chicago O'Hare Intl Airport to Sofia?

    Chicago O'Hare Intl Airport to Sofia flights have a layover in Istanbul most often. Warsaw is the second most popular location for layovers on flights from Chicago O'Hare Intl Airport to Sofia.

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

    Istanbul travelers tend to visit Taksim Square, Sultan Ahmet Camii, and Beyazit Meydani more than anywhere else. Travelers on a layover in Istanbul can visit Taksim Square, Sultan Ahmet Camii, and Beyazit Meydani, by traveling 20.8 mi, 22.3 mi, and 21.7 mi, respectively after landing at Istanbul. Travelers can book a car rental at Istanbul for about $42 per day to make their sightseeing more efficient.

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

    Warsaw travelers tend to visit Warsaw Old Town, Natolin, and Pałac Kultury i Nauki more than any other notable places. Warsaw Old Town, Natolin and Pałac Kultury i Nauki are located about 6.1 mi, 5.0 mi, and 4.8 mi, respectively from Warsaw Frederic Chopin if you are interested in checking them out. Travelers can book a car rental at Warsaw Frederic Chopin for about $29 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Chicago O'Hare Intl Airport to Sofia flights?

    Chicago O'Hare Intl Airport to Sofia flights that have layovers will least frequently stop in Frankfurt am Main. Munich sees the second fewest layovers for non-direct flights flying from Chicago O'Hare Intl Airport to Sofia.

  • Can I find deals for flights from O'Hare Intl to Sofia that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to Sofia?

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

  • Can I find deals for business class flights from O'Hare Intl to Sofia?

    Yes. Cheapflights offers flight deals from O'Hare Intl 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 O'Hare Intl Airport to Sofia?

    Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Sofia (average of $632). Flying from Chicago O'Hare Intl Airport to Sofia in June is currently the most expensive (average of $1,201). 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

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Alternative routes for O'Hare Intl to Sofia

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

Top 10 airlines flying from O'Hare Intl to Sofia

Discover the top 10 airlines that operate flights from O'Hare Intl 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 June 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$493Average$792FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$498Average$604FlexibilityNo cancel feeOn-time77%
LOTCheapest$573Average$880FlexibilityNo cancel feeOn-time81%
KLMCheapest$578Average$739FlexibilityNo cancel feeOn-time75%
SWISSCheapest$596Average$920FlexibilityNo cancel feeOn-time79%
Austrian AirlinesCheapest$609Average$875FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$613Average$778FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$614Average$956FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$617Average$812FlexibilityNo cancel feeOn-time69%
Air SerbiaCheapest$652Average$1,021FlexibilityNo cancel feeOn-timeN/A

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