HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
O'Hare Intl

$530+ 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 6/20. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ORD
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Sofia to O'Hare Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 junio 12, 2025.

Round-trip from

$669
(Air France)

One-way from

$530
(Kiwi.com)

Popular in

August

Cheapest in

November

Average price

$729
From Sofia to Chicago O'Hare Intl
Search Deals
One-way flight from Sofia to Chicago O'Hare Intl
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($77 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

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 junio 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/10. 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.
jue. 6/193:35 pmSOF - ORD
1 stop26h 05mTurkish Airlines
lun. 6/3011:25 amORD - SOF
1 stop13h 10mTurkish Airlines
Deal found 6/10$668
This KLM deal was found by Cheapflights users on 6/11. 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.
vie. 11/217:00 amSOF - ORD
1 stop15h 30mKLM
dom. 12/74:25 pmORD - SOF
1 stop13h 40mKLM
Deal found 6/11$670
This Trip.com deal was found by Cheapflights users on 6/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 6/226:00 pmSOF - ORD
1 stop27h 10mITA Airways
sáb. 7/193:00 pmORD - SOF
1 stop18h 10mITA Airways
Deal found 6/12$673
This United Airlines deal was found by Cheapflights users on 6/11. 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.
lun. 6/231:50 pmSOF - ORD
2 stops26h 09mUnited Airlines
mar. 7/86:00 pmORD - SOF
1 stop21h 00mUnited Airlines
Deal found 6/11$675
This oojo deal was found by Cheapflights users on 6/12. 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.
sáb. 6/216:40 pmSOF - ORD
1 stop25h 25mLOT
sáb. 7/129:40 pmORD - SOF
1 stop12h 15mLOT
Deal found 6/12$678
This Air France deal was found by Cheapflights users on 6/12. 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.
sáb. 11/17:00 amSOF - ORD
2 stops16h 34mMultiple Airlines
sáb. 12/61:35 pmORD - SOF
2 stops16h 20mMultiple Airlines
Deal found 6/12$679
This British Airways deal was found by Cheapflights users on 6/12. 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. 6/238:00 pmSOF - ORD
2 stops45h 16mBritish Airways
sáb. 7/122:37 pmORD - SOF
2 stops21h 43mBritish Airways
Deal found 6/12$680
This Lufthansa deal was found by Cheapflights users on 6/12. 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.
mar. 6/246:20 amSOF - ORD
1 stop16h 35mLufthansa
dom. 7/139:40 pmORD - SOF
1 stop17h 20mLufthansa
Deal found 6/12$687
This Air Canada deal was found by Cheapflights users on 6/12. 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.
mar. 6/246:20 amSOF - ORD
2 stops35h 32mAir Canada
lun. 7/149:55 amORD - SOF
2 stops18h 05mAir Canada
Deal found 6/12$694
This Austrian Airlines deal was found by Cheapflights users on 6/12. 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.
sáb. 6/216:55 pmSOF - ORD
1 stop26h 25mAustrian Airlines
lun. 7/143:55 pmORD - SOF
2 stops18h 15mAustrian Airlines
Deal found 6/12$729

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 junio 12, 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

sáb. 11/1

7:00 am-3:30 pm

1 stop15h 30m

Chicago O'Hare Intl

sáb. 12/6

1:35 pm-1:55 pm

2 stops16h 20m

$669

SofiaChicago

SOF - ORD

SOFORD

Sofia

vie. 11/21

7:00 am-2:30 pm

1 stop15h 30m

Chicago O'Hare Intl

dom. 12/7

4:25 pm-2:05 pm

1 stop13h 40m

$670

SofiaChicago

SOF - ORD

SOFORD

Sofia

dom. 6/22

6:00 pm-1:10 pm

1 stop27h 10m

Chicago O'Hare Intl

sáb. 7/19

3:00 pm-5:10 pm

1 stop18h 10m

$673

SofiaChicago

SOF - ORD

SOFORD

Sofia

lun. 6/23

1:50 pm-7:59 am

2 stops26h 09m

Chicago O'Hare Intl

mar. 7/8

6:00 pm-11:00 pm

1 stop21h 00m

$675

SofiaChicago

SOF - ORD

SOFORD

Sofia

lun. 6/23

5:20 am-7:40 pm

1 stop22h 20m

Chicago O'Hare Intl

lun. 7/21

5:10 pm-2:00 am

1 stop24h 50m

$678

SofiaChicago

SOF - ORD

SOFORD

Sofia

lun. 6/23

8:00 pm-9:16 am

2 stops45h 16m

Chicago O'Hare Intl

sáb. 7/12

2:37 pm-8:20 pm

2 stops21h 43m

$680

SofiaChicago

SOF - ORD

SOFORD

Sofia

lun. 9/15

7:00 am-5:36 pm

2 stops18h 36m

Chicago O'Hare Intl

mar. 9/30

1:35 pm-2:00 pm

2 stops16h 25m

$684

SofiaChicago

SOF - ORD

SOFORD

Sofia

mar. 6/24

6:20 am-2:55 pm

1 stop16h 35m

Chicago O'Hare Intl

dom. 7/13

9:40 pm-11:00 pm

1 stop17h 20m

$687

SofiaChicago

SOF - ORD

SOFORD

Sofia

mar. 6/24

6:20 am-9:52 am

2 stops35h 32m

Chicago O'Hare Intl

lun. 7/14

9:55 am-12:00 pm

2 stops18h 05m

$694

SofiaChicago

SOF - ORD

SOFORD

Sofia

dom. 6/22

4:05 pm-1:20 pm

1 stop29h 15m

Chicago O'Hare Intl

mar. 7/15

1:05 pm-11:40 am

2 stops14h 35m

$736

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 19 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 June 9, 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 junio 12, 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.

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

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

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

Rainfall in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago O'Hare Intl Airport 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 O'Hare Intl Airport when rainfall is around 1.7 in.

Temperature in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago O'Hare Intl Airport, 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 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 junio 12, 2025.
To help decide which airline to fly from Sofia to Chicago, see what other customers have to say about KLM, LOT and Austrian Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,358 reviews

Overall

7.8

Food

7.2

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
KLM
7.8
Good
1,358 reviews
KLM
7.8
Good
1,358 reviews

Overall

7.8

Food

7.2

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
LOT
7.6
Good
1,077 reviews
KLM
7.8
Good
1,358 reviews

Overall

7.8

Food

7.2

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Austrian Airlines
7.6
Good
802 reviews
KLM
7.8
Good
1,358 reviews

Overall

7.8

Food

7.2

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Air France
7.5
Good
1,463 reviews
KLM
7.8
Good
1,358 reviews

Overall

7.8

Food

7.2

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Qatar Airways
7.4
Good
3,584 reviews
KLM
7.8
Good
1,358 reviews

Overall

7.8

Food

7.2

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.

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 8 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 KLM. Our recent data shows that you can find tickets from as low as $670 on this airline. Additional options worth looking into are ITA Airways and United Airlines, starting at $673 and $675 round-trip. You may be able to fly from Sofia to Chicago O'Hare Intl Airport for 7% 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?

    $576 is the cheapest one-way deal found within the past few days, from Qatar Airways. You may also be able to find cheap deals on TAP AIR PORTUGAL and British Airways, with prices starting from $654 and $655, 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 Sofia?

Book flights to Sofia if you plan to visit one of these locations
Schaumburg
Hoffman Estates
Rosemont
Beloit
Elgin
Racine
Skokie
Arlington Heights
Rockford
Naperville
Orland Park
Elk Grove Village
Tinley Park
Northbrook
Joliet
Merrillville
Bridgeview
Glenview
Des Plaines
Lake Geneva

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 8 airlines flying from Sofia to O'Hare Intl

Discover the top 8 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$485Average$763FlexibilityNo cancel feeOn-time75%
LOTCheapest$532Average$627FlexibilityNo cancel feeOn-time81%
British AirwaysCheapest$546Average$864FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$560Average$672FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$576Average$773FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$603Average$702FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$615Average$785FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$641Average$720FlexibilityNo cancel feeOn-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.