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$414+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ORD
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$641
(KLM)

One-way from

$414
(Mytrip)

Popular in

January

Cheapest in

November

Average price

$666
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 ($25 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 March 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 March 31, 2025.

This oojo deal was found by Cheapflights users on 3/30. 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.
Mon 4/76:40 pmSOF - ORD
1 stop33h 00mLOT
Tue 12/309:55 pmORD - SOF
1 stop11h 55mLOT
Deal found 3/30$638
This KLM deal was found by Cheapflights users on 3/30. 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.
Sat 4/267:00 amSOF - ORD
2 stops21h 10mKLM
Sat 5/104:20 pmORD - SOF
1 stop13h 40mKLM
Deal found 3/30$641
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/226:15 amSOF - ORD
2 stops21h 57mUnited Airlines
Wed 9/179:40 pmORD - SOF
1 stop17h 20mUnited Airlines
Deal found 3/30$645
This Air Canada deal was found by Cheapflights users on 3/30. 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.
Tue 5/206:20 amSOF - ORD
2 stops37h 12mAir Canada
Mon 9/2210:40 amORD - SOF
2 stops23h 10mAir Canada
Deal found 3/30$655
This KLM deal was found by Cheapflights users on 3/29. 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.
Fri 4/117:00 amSOF - ORD
1 stop15h 10mMultiple Airlines
Sat 4/195:10 pmORD - SOF
1 stop12h 50mMultiple Airlines
Deal found 3/29$665
This Orbitz deal was found by Cheapflights users on 3/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/216:15 amSOF - ORD
1 stop14h 40mLufthansa
Thu 5/155:50 pmORD - SOF
1 stop16h 45mLufthansa
Deal found 3/30$666
This SWISS deal was found by Cheapflights users on 3/30. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2412:45 pmSOF - ORD
2 stops31h 25mSWISS
Mon 9/227:05 pmORD - SOF
1 stop31h 00mSWISS
Deal found 3/30$695
This Air France deal was found by Cheapflights users on 3/31. 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.
Thu 6/197:00 amSOF - MDW
2 stops18h 45mMultiple Airlines
Mon 6/301:09 pmMDW - SOF
2 stops16h 51mMultiple Airlines
Deal found 3/31$710
This KLM deal was found by Cheapflights users on 3/30. 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.
Thu 6/197:00 amSOF - MDW
2 stops18h 57mKLM
Mon 6/301:09 pmMDW - SOF
2 stops16h 51mKLM
Deal found 3/30$716
This Austrian Airlines deal was found by Cheapflights users on 3/30. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/64:05 pmSOF - ORD
1 stop29h 15mAustrian Airlines
Sun 12/284:20 pmORD - SOF
1 stop11h 30mAustrian Airlines
Deal found 3/30$733
This CheapOair deal was found by Cheapflights users on 3/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/309:30 pmSOF - ORD
1 stop28h 45mBritish Airways
Sat 5/319:15 pmORD - SOF
1 stop15h 05mBritish Airways
Deal found 3/30$737
This Aeromexico deal was found by Cheapflights users on 3/30. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/117:00 amSOF - ORD
2 stops24h 59mAir France
Sat 4/1911:15 amORD - SOF
2 stops18h 45mAir France
Deal found 3/30$756

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 March 31, 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

Sat 4/26

7:00 am-8:10 pm

2 stops21h 10m

Chicago O'Hare Intl

Sat 5/10

4:20 pm-2:00 pm

1 stop13h 40m

$641

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 5/25

6:40 pm-7:40 pm

2 stops33h 00m

Chicago O'Hare Intl

Mon 9/22

9:40 pm-5:55 pm

1 stop12h 15m

$643

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 5/22

6:15 am-8:12 pm

2 stops21h 57m

Chicago O'Hare Intl

Wed 9/17

9:40 pm-11:00 pm

1 stop17h 20m

$645

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 5/20

6:20 am-11:32 am

2 stops37h 12m

Chicago O'Hare Intl

Mon 9/22

10:40 am-5:50 pm

2 stops23h 10m

$655

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 4/11

7:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

Sat 4/19

5:10 pm-2:00 pm

1 stop12h 50m

$665

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 4/21

6:15 am-12:55 pm

1 stop14h 40m

Chicago O'Hare Intl

Thu 5/15

5:50 pm-6:35 pm

1 stop16h 45m

$666

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 5/24

12:45 pm-12:10 pm

2 stops31h 25m

Chicago O'Hare Intl

Mon 9/22

7:05 pm-10:05 am

1 stop31h 00m

$695

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Thu 6/19

7:00 am-5:45 pm

2 stops18h 45m

Chicago Midway

Mon 6/30

1:09 pm-2:00 pm

2 stops16h 51m

$710

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Thu 6/19

7:00 am-5:57 pm

2 stops18h 57m

Chicago Midway

Mon 6/30

1:09 pm-2:00 pm

2 stops16h 51m

$716

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 4/30

9:30 pm-6:15 pm

1 stop28h 45m

Chicago O'Hare Intl

Sat 5/31

9:15 pm-8:20 pm

1 stop15h 05m

$737

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 26 results
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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 $323). 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 March 31, 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 March 31, 2025.
To help decide which airline to fly from Sofia to Illinois, see what other customers have to say about Emirates, KLM and LOT. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Emirates
8.0
Very good
3,192 reviews

Food

7.8

Overall

8.0

Entertainment

8.2

Comfort

8.0

Crew

8.3

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.
Emirates
8.0
Very good
3,192 reviews
Emirates
8.0
Very good
3,192 reviews

Food

7.8

Overall

8.0

Entertainment

8.2

Comfort

8.0

Crew

8.3

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.
KLM
7.8
Good
1,321 reviews
Emirates
8.0
Very good
3,192 reviews

Food

7.8

Overall

8.0

Entertainment

8.2

Comfort

8.0

Crew

8.3

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.
LOT
7.6
Good
1,065 reviews
Emirates
8.0
Very good
3,192 reviews

Food

7.8

Overall

8.0

Entertainment

8.2

Comfort

8.0

Crew

8.3

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.
Austrian Airlines
7.6
Good
770 reviews
Emirates
8.0
Very good
3,192 reviews

Food

7.8

Overall

8.0

Entertainment

8.2

Comfort

8.0

Crew

8.3

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.
SWISS
7.5
Good
1,570 reviews
Emirates
8.0
Very good
3,192 reviews

Food

7.8

Overall

8.0

Entertainment

8.2

Comfort

8.0

Crew

8.3

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

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 British Airways, with whom users have recently found tickets for as low as $619. However, be on the lookout for offers from LOT and American Airlines, 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 $323). 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$460Average$777FlexibilityNo cancel feeOn-time75%
LOTCheapest$490Average$638FlexibilityNo cancel feeOn-time81%
British AirwaysCheapest$546Average$864FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$560Average$672FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$576Average$726FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$594Average$771FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$603Average$723FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$627Average$710FlexibilityNo cancel feeOn-time77%
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