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$338+ Cheap flights from Sofia (SOF) to Illinois

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ORD
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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Cheap flight deals from Sofia to Illinois

Keep the following information in mind while searching for Sofia to Illinois flight deals. Data was last updated April 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$628
(oojo)

One-way from

$338
(Kiwi.com)

Popular in

January

Cheapest in

November

Average price

$679
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 Illinois
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One-way flight from Sofia to Illinois
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Highest demand for flights based on searches. 3% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Sofia to Illinois

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

This oojo deal was found by Cheapflights users on 4/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/206:40 pmSOF - ORD
1 stop33h 00mLOT
Fri 9/194:55 pmORD - SOF
2 stops17h 00mLOT
Deal found 4/29$628
This Air France deal was found by Cheapflights users on 4/29. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/157:00 amSOF - ORD
2 stops18h 36mAir France
Tue 9/301:35 pmORD - SOF
2 stops16h 25mAir France
Deal found 4/29$635
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Mon 6/236:15 amSOF - ORD
2 stops17h 35mUnited Airlines
Thu 7/175:56 pmORD - SOF
2 stops15h 54mUnited Airlines
Deal found 4/29$682
This Air Canada deal was found by Cheapflights users on 4/29. 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.
Fri 6/66:15 amSOF - ORD
2 stops33h 44mAir Canada
Fri 10/310:00 amORD - SOF
2 stops17h 15mAir Canada
Deal found 4/29$692
This Lufthansa deal was found by Cheapflights users on 4/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/236:00 amSOF - ORD
1 stop16h 00mLufthansa
Tue 8/59:40 pmORD - SOF
1 stop17h 20mLufthansa
Deal found 4/29$696
This SWISS deal was found by Cheapflights users on 4/29. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/213:30 pmSOF - ORD
1 stop28h 40mSWISS
Fri 8/12:20 pmORD - SOF
1 stop11h 45mSWISS
Deal found 4/29$701
This Austrian Airlines deal was found by Cheapflights users on 4/29. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/264:05 pmSOF - ORD
1 stop29h 15mAustrian Airlines
Mon 8/44:20 pmORD - SOF
1 stop17h 50mAustrian Airlines
Deal found 4/29$731
This FlightHub deal was found by Cheapflights users on 4/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/196:15 amSOF - ORD
2 stops16h 49mMultiple Airlines
Mon 6/307:05 pmORD - SOF
2 stops15h 35mMultiple Airlines
Deal found 4/29$764
This KLM deal was found by Cheapflights users on 4/29. 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 6/197:00 amSOF - MDW
2 stops19h 02mKLM
Mon 6/301:09 pmMDW - SOF
2 stops16h 51mKLM
Deal found 4/29$991
This Turkish Airlines deal was found by Cheapflights users on 4/29. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/279:15 pmSOF - ORD
1 stop20h 25mTurkish Airlines
Thu 7/3111:25 amORD - SOF
1 stop13h 10mTurkish Airlines
Deal found 4/29$1,003
This KLM deal was found by Cheapflights users on 4/29. 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 7/247:00 amSOF - ORD
2 stops19h 07mKLM
Fri 8/11:30 pmORD - SOF
2 stops16h 30mKLM
Deal found 4/29$1,099
This Qatar Airways deal was found by Cheapflights users on 4/29. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/251:30 pmSOF - ORD
2 stops54h 37mQatar Airways
Wed 7/307:20 pmORD - SOF
1 stop33h 10mQatar Airways
Deal found 4/29$1,578

Cheapflights Fare Finder

Customize your flight search to find flights from Sofia to Illinois 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 April 30, 2025.
Use the filters below to find and compare flights from Sofia to Illinois that are best for you.

Fly from

Sofia

Fly to

Illinois

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 5/20

6:40 pm-7:40 pm

1 stop33h 00m

Chicago O'Hare Intl

Fri 9/19

4:55 pm-5:55 pm

2 stops17h 00m

$628

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 9/15

7:00 am-5:36 pm

2 stops18h 36m

Chicago O'Hare Intl

Tue 9/30

1:35 pm-2:00 pm

2 stops16h 25m

$635

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 6/23

6:15 am-3:50 pm

2 stops17h 35m

Chicago O'Hare Intl

Thu 7/17

5:56 pm-5:50 pm

2 stops15h 54m

$682

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 6/6

6:15 am-7:59 am

2 stops33h 44m

Chicago O'Hare Intl

Fri 10/3

10:00 am-11:15 am

2 stops17h 15m

$692

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 7/23

6:00 am-2:00 pm

1 stop16h 00m

Chicago O'Hare Intl

Tue 8/5

9:40 pm-11:00 pm

1 stop17h 20m

$696

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 7/21

3:30 pm-12:10 pm

1 stop28h 40m

Chicago O'Hare Intl

Fri 8/1

2:20 pm-10:05 am

1 stop11h 45m

$701

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 7/26

4:05 pm-1:20 pm

1 stop29h 15m

Chicago O'Hare Intl

Mon 8/4

4:20 pm-6:10 pm

1 stop17h 50m

$731

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 6/19

6:15 am-3:04 pm

2 stops16h 49m

Chicago O'Hare Intl

Mon 6/30

7:05 pm-6:40 pm

2 stops15h 35m

$764

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Thu 6/19

7:00 am-6:02 pm

2 stops19h 02m

Chicago Midway

Mon 6/30

1:09 pm-2:00 pm

2 stops16h 51m

$991

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 7/27

9:15 pm-9:40 am

1 stop20h 25m

Chicago O'Hare Intl

Thu 7/31

11:25 am-8:35 am

1 stop13h 10m

$1,003

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 25 results
1
2
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Best time to book a flight from Sofia to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois 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 Illinois

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

Currently, August is the cheapest month in which you can book a flight from Sofia to Illinois (average of $245). Flying from Sofia to Illinois 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 IL?

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

When flying from Sofia to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois 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 Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated April 30, 2025.
KLM
7.8
Good
1,333 reviews

Food

7.2

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,333 reviews
KLM
7.8
Good
1,333 reviews

Food

7.2

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
LOT
7.6
Good
1,069 reviews
KLM
7.8
Good
1,333 reviews

Food

7.2

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Austrian Airlines
7.6
Good
780 reviews
KLM
7.8
Good
1,333 reviews

Food

7.2

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
SWISS
7.5
Good
1,588 reviews
KLM
7.8
Good
1,333 reviews

Food

7.2

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Qatar Airways
7.4
Good
3,563 reviews
KLM
7.8
Good
1,333 reviews

Food

7.2

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

Related info for your journey

Find useful and relevant information for your journey from Sofia to Illinois. 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 Illinois?

    Most people fly from Sofia (SOF) if they book a flight from Sofia to Illinois. Sofia is conveniently located just 4.2 mi from Sofia’s city center.

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

    The cheapest airline one-way is Air Serbia, with whom users have recently found tickets for as low as $419. However, be on the lookout for offers from Qatar Airways and British Airways, as they are both options that can get you from Sofia to Illinois for a low price.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Sofia to Illinois (average of $245). Flying from Sofia to Illinois 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

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Alternative routes for Sofia to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Sofia to Illinois

Discover the top 8 airlines that operate flights from Sofia to Illinois. 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$485Average$759FlexibilityNo 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$733FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$603Average$718FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$614Average$774FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$627Average$708FlexibilityNo cancel feeOn-time77%

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