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O'Hare Intl

$373+ Cheap flights from Sofia (SOF) to O'Hare Intl (ORD)

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ORD
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheapflights Tip: The best prices from Sofia to Chicago O'Hare Intl are usually found in November or February, booked 34 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap flight deals from Sofia to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to O'Hare Intl (ORD). 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 July 29, 2025.

Round-trip from

$669
(Gotogate)

One-way from

$373
(Kiwi.com)

Popular in

August

Cheapest in

November

Average price

$729
From Sofia to Chicago O'Hare Intl
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One-way flight from Sofia to Chicago O'Hare Intl
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Highest demand for flights based on searches. 7% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Sofia to O'Hare Intl

Cheapest flights from Sofia to O'Hare Intl
Explore the most affordable flight options available from Sofia to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This Gotogate deal was found by Cheapflights users on 7/28. 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.
Mon 9/86:00 amSOF - ORD
2 stops14h 55mMultiple Airlines
Mon 9/2210:40 amORD - SOF
2 stops17h 50mMultiple Airlines
Deal found 7/28$669
This British Airways deal was found by Cheapflights users on 7/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/109:30 pmSOF - ORD
1 stop26h 25mBritish Airways
Wed 9/246:55 pmORD - SOF
2 stops34h 35mBritish Airways
Deal found 7/29$671
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Fri 9/126:15 amSOF - ORD
1 stop16h 40mUnited Airlines
Fri 9/193:35 pmORD - SOF
2 stops37h 30mUnited Airlines
Deal found 7/29$673
This Lufthansa deal was found by Cheapflights users on 7/28. 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 12/12:20 pmSOF - ORD
1 stop13h 45mLufthansa
Tue 12/166:25 pmORD - SOF
1 stop20h 20mLufthansa
Deal found 7/28$678
This LOT deal was found by Cheapflights users on 7/28. 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 LOT is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/105:20 amSOF - ORD
1 stop22h 20mLOT
Sat 12/139:55 pmORD - SOF
1 stop11h 55mLOT
Deal found 7/28$688
This KLM deal was found by Cheapflights users on 7/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/117:00 amSOF - ORD
2 stops17h 20mKLM
Fri 9/262:05 pmORD - SOF
2 stops15h 55mKLM
Deal found 7/29$695
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/106:15 amSOF - ORD
2 stops21h 56mAir Canada
Sun 12/147:15 amORD - SOF
2 stops21h 55mAir Canada
Deal found 7/29$734

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sofia to O'Hare Intl 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 July 29, 2025.
Use the filters below to find and compare flights from Sofia to Chicago O'Hare Intl Airport that are best for you.

Fly from

Sofia

Fly to

O'Hare Intl

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 9/8

6:00 am-12:55 pm

2 stops14h 55m

Chicago O'Hare Intl

Mon 9/22

10:40 am-12:30 pm

2 stops17h 50m

$669

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 9/10

9:30 pm-3:55 pm

1 stop26h 25m

Chicago O'Hare Intl

Wed 9/24

6:55 pm-1:30 pm

2 stops34h 35m

$671

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 9/12

2:35 pm-3:10 pm

2 stops32h 35m

Chicago O'Hare Intl

Mon 9/29

5:10 pm-5:55 pm

1 stop16h 45m

$673

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 12/1

2:20 pm-8:05 pm

1 stop13h 45m

Chicago O'Hare Intl

Tue 12/16

6:25 pm-10:45 pm

1 stop20h 20m

$678

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 12/1

2:20 pm-8:05 pm

1 stop13h 45m

Chicago O'Hare Intl

Tue 12/30

1:24 pm-1:50 pm

2 stops16h 26m

$683

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 9/11

7:00 am-4:20 pm

2 stops17h 20m

Chicago O'Hare Intl

Fri 9/26

2:05 pm-2:00 pm

2 stops15h 55m

$695

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 10/15

6:15 am-2:55 pm

2 stops16h 40m

Chicago O'Hare Intl

Fri 3/6

12:50 pm-6:15 pm

2 stops21h 25m

$709

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 10/1

5:55 pm-12:35 pm

2 stops26h 40m

$373

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 9/27

4:05 pm-9:00 pm

1 stop12h 55m

$571

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 9/5

1:30 pm-3:05 pm

1 stop33h 35m

$592

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 14 results
1
2

Best time to book a flight from Sofia to O'Hare Intl

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Sofia to O'Hare Intl. Price data was last updated on July 25, 2025.

To ensure you get the cheapest price possible for a flight from Sofia to Chicago O'Hare Intl Airport, you should look to book at least 34 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Sofia to Chicago O'Hare Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Sofia to Chicago O'Hare Intl Airport (average of $245). Flying from Sofia to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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 ORD?

Find hourly flight availability from Sofia to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

A simple way to save on the total cost of your ticket is to fly from Sofia to Chicago O'Hare Intl Airport at noon. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated July 29, 2025.
See what other customers who have flown with KLM, LOT, and Air France from Sofia to Chicago O'Hare Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

Overall

7.8

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
1,383 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

Overall

7.8

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.
LOT
7.6
Good
1,105 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

Overall

7.8

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
1,465 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

Overall

7.8

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.
Qatar Airways
7.4
Good
3,609 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

Overall

7.8

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
8,899 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Food

7.3

Crew

8.4

Overall

7.8

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 Sofia to O'Hare Intl. 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 O'Hare Intl?

    Located just 4.2 mi from the city center, Sofia is the airport most travelers will use when flying to Chicago O'Hare Intl from Sofia. Booking flights from Sofia (SOF) to Chicago O'Hare Intl should be relatively easy as there are 0 daily outbound flights to Chicago O'Hare Intl from 7 different airlines.

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

    Our cheapest airline available from Sofia to Chicago O'Hare Intl Airport is British Airways. Our recent data shows that you can find tickets from as low as $671 on this airline. Additional options worth looking into are LOT and Lufthansa, starting at $673 and $678 round-trip. You may be able to fly from Sofia to Chicago O'Hare Intl Airport for 6% less than the average price by searching for these airlines.

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

    $571 is the cheapest one-way deal found within the past few days, from Air Serbia. You may also be able to find cheap deals on Qatar Airways and Lufthansa, with prices starting from $592 and $603, respectively.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Sofia to Chicago O'Hare Intl Airport (average of $245). Flying from Sofia to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Schaumburg
Rosemont
Beloit
Hoffman Estates
Skokie
Naperville
Des Plaines
Elgin
Arlington Heights
Elk Grove Village
Racine
Rockford
Tinley Park
Orland Park
Merrillville
Downers Grove
Evanston
Lake Geneva
Gurnee
Joliet

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Sofia to O'Hare Intl

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

Top 7 airlines flying from Sofia to O'Hare Intl

Discover the top 7 airlines that operate flights from Sofia to O'Hare Intl. 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$460Average$750FlexibilityNo cancel feeOn-time75%
LOTCheapest$532Average$632FlexibilityNo cancel feeOn-time81%
Air FranceCheapest$560Average$672FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$576Average$763FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$603Average$704FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$616Average$762FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$627Average$708FlexibilityNo cancel feeOn-time77%

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