SOF - CHI

$383 Find Cheap Flights from Sofia to Chicago - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sofia to Chicago departing on 9/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$800
Typical prices: $752-$880
LOT
Wed 9/9Thu 10/22
SOF - ORD • 2 stops
Cheapest one-way
$383
Typical prices: $668-$787
Multiple Airlines
Mon 9/28
SOF - ORD • 3 stops
Top airlines
Cheapest • from $800 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Sofia and Chicago. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $619 (round-trip)
Shortest trip • 13h 05m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 11% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 6% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Sofia to Chicago (SOF-CHI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Sofia to Chicago that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Sofia to Chicago

Wed, Sep 9 - Thu, Oct 22
LOT Logo
6:45 pm - 3:10 pm
SOF
-
ORD
52h 25m
2 stops
LOT Logo
5:10 pm - 6:00 pm
ORD
-
SOF
16h 50m
2 stops
$800LOT
Fri, Sep 11 - Thu, Oct 22
LOT Logo
2:35 pm - 7:50 pm
SOF
-
ORD
13h 15m
1 stop
LOT Logo
9:50 pm - 6:00 pm
ORD
-
SOF
12h 10m
1 stop
$800LOT
Wed, Sep 30 - Sun, Mar 28
Multiple Airlines Logo
7:10 pm - 10:59 pm
SOF
-
ORD
35h 49m
2 stops
Multiple Airlines Logo
3:35 pm - 12:10 pm
ORD
-
SOF
12h 35m
1 stop
$802Multiple Airlines
Wed, Sep 30 - Wed, Mar 31
Multiple Airlines Logo
7:10 pm - 10:59 pm
SOF
-
ORD
35h 49m
2 stops
Multiple Airlines Logo
3:35 pm - 12:10 pm
ORD
-
SOF
12h 35m
1 stop
$803Multiple Airlines
Thu, Sep 10 - Sun, Jan 17
Turkish Airlines Logo
3:50 pm - 9:40 am
SOF
-
ORD
25h 50m
1 stop
Turkish Airlines Logo
11:45 am - 8:50 am
ORD
-
SOF
13h 05m
1 stop
$809Turkish Airlines
Fri, Oct 23 - Sun, Nov 1
Lufthansa Logo
2:10 pm - 7:55 pm
SOF
-
ORD
13h 45m
1 stop
Lufthansa Logo
6:00 pm - 1:15 pm
ORD
-
SOF
11h 15m
1 stop
$824Lufthansa
Mon, Sep 21 - Wed, Mar 10
Turkish Airlines Logo
9:10 pm - 9:40 am
SOF
-
ORD
20h 30m
1 stop
Turkish Airlines Logo
9:15 pm - 11:05 am
ORD
-
SOF
29h 50m
1 stop
$838Turkish Airlines
Sat, Oct 3 - Tue, Mar 30
Lufthansa Logo
6:20 am - 7:46 pm
SOF
-
ORD
21h 26m
2 stops
Lufthansa Logo
3:35 pm - 12:10 pm
ORD
-
SOF
12h 35m
1 stop
$840Lufthansa
Thu, Sep 24 - Wed, Oct 7
United Airlines Logo
6:30 am - 2:55 pm
SOF
-
ORD
16h 25m
1 stop
United Airlines Logo
3:35 pm - 12:10 pm
ORD
-
SOF
12h 35m
1 stop
$849United Airlines
Thu, Sep 17 - Sat, Oct 3
United Airlines Logo
6:30 am - 2:52 pm
SOF
-
ORD
16h 22m
2 stops
United Airlines Logo
12:55 pm - 11:40 am
ORD
-
SOF
14h 45m
2 stops
$849United Airlines
Booking Insights

KAYAK's insights & trends for Sofia to Chicago flights

Get data-powered insights and trends into flights from Sofia to Chicago to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Sofia to Chicago?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Sofia to Chicago departing in December.

Flight prices are below average for this route right now.

Flights to Chicago from Sofia usually cost between $810 and $1,068 in December.
The lowest price found in the past 5 days was $799 on LOT (Dec 22-Jan 5).

What is the cheapest month to fly from Sofia to Chicago?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sofia to Chicago, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Sofia to Chicago is December, where tickets cost $750 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is $878 and $865 respectively.

How far in advance should I book a flight from Sofia to Chicago?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Sofia to Chicago, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Sofia to Chicago, you should book around 5 weeks before departure, which saves you about 11% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low season

February

Cheapest flight

$383
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from Sofia to Chicago O'Hare Airport

When to book flights from Sofia to Chicago

Are your dates flexible? Find out the best times to travel from Sofia to Chicago based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Sofia to Chicago

  • What is the cheapest flight from Sofia to Chicago?

    In the last 5 days, the lowest price for a flight from Sofia to Chicago was $383 for a one-way ticket and $800 for a round-trip.

  • Do I need a passport to fly between Sofia and Chicago?

    A passport is required to fly from Sofia to Chicago.

  • Which aircraft models fly most regularly from Sofia to Chicago?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Sofia to Chicago?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Sofia and Chicago, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Sofia to Chicago, KLM or LOT?

    The two airlines most popular with KAYAK users for flights from Sofia to Chicago are KLM and LOT. With an average price for the route of $744 and an overall rating of 7.8, KLM is the most popular choice. LOT is also a great choice for the route, with an average price of $782 and an overall rating of 7.6.

  • How does KAYAK find such low prices on flights from Sofia to Chicago?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Sofia to Chicago.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Sofia to Chicago?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from Sofia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Sofia to Chicago?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chicago with an airline and back to Sofia with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Sofia to Chicago?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chicago from Sofia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Sofia to Chicago

 
See real verified KAYAK customer reviews for airlines flying from Sofia to Chicago. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Sofia to Chicago? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1552 reviews
8.4Crew
7.2Entertainment
7.3Food
7.8Boarding
7.7Comfort
Airline reviews

I think I previously submitted my feedback about flight lead Katherine in a different field by mistake. Please see those comments. Comments for Hyd to AMS are it was good. The flight lead and service met expectations for satisfactory high quality service but the flight lead did not stand out as exceptional as did the leads on the other two flights so I don’t remember anything specific one way or the other besides the fact I was satisfied.

10.0 ExcellentEmily, Jul 2026
ORD - MSP
Read more KLM reviews

I think I previously submitted my feedback about flight lead Katherine in a different field by mistake. Please see those comments. Comments for Hyd to AMS are it was good. The flight lead and service met expectations for satisfactory high quality service but the flight lead did not stand out as exceptional as did the leads on the other two flights so I don’t remember anything specific one way or the other besides the fact I was satisfied.

Flight lead was a gentleman with silver hair and he went out of his way to shake hands and interact with each passenger seated in business class. A medical emergency took place during our flight and he handled it with perfect poise and professionalism. He was gracious and confidently competent. Just what you want from a leader,

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

Seats were nice and comfy. Crew was polite and attentive. Business class is awesome and worth the money.

It was operated by Delta. Boarding took a long time. How difficult can it be? Overall decent trip. Liked the Salt Lake City airport. Better option than Chicago for transfers.

We left one hour late because of technical difficulties. The economy comfort seats are great for the price. The crew was mediocre, they do not provide a pleasant experience, they just deliver food and drinks and give orders, not very amicable, no service and hospitality focus.

one of my bags was drenched with fish smelling water and all my new clothes bought at dublin and the 23kg checked in bag were all gone waste with very pungent fish smell and also having stains

My ONLY complaint with LOT was the lack of WiFi and the food in business class… still, I use them because they have great connections to Chicago and they fly the 787 - which I think is a great wide body jet. Well… now LOT has WiFi (good satellite speeds) and AMAZING food. LOT now is giving Turkish Airlines a big big run for the money. And they consistently have less expensive business class. I am a very happy customer!

Issue with boarding, group of passengers on a religious trip coming back to NYC kept trying to change seats, even standing when the plane was pushing back. Crew/Pilot kept very good composure, some passengers got aggravated and started venting out loud but this group created a serious security risk. Crew/Pilot should've been more stringent and called in security or remove them from the flight.

The seat was paid for but given for some different person .

Krakow airport is very disorganized. nice seats. friendly crew. long legs had screens. short leg did not

Flight was delayed for a hour from Warsaw, not sure why. When we landed in Chicago, plane was still on the runway for about half a hour. Took a while to get off.

No WiFi and ok comfort in business class. Home safe I guess that’s all that really matters.

I would like to be able to choose the seat before the flight without paying extra money. Family members should not to be separated from each other.

Flight was delayed by a hour could have been better addressed. Flight was fine with great service by the flight attendants

They broke my luggage. I’m pissed off about that. Service was slow and inconsistent.

All good. Didn’t get the seats I booked online. Luckily, copassanger cooperated! Mistake- I failed to verify connecting flight seats details at Mumbai. Staff at Mumbai airport to be blamed equally!

Horrible service at the baggage claim. Stuck on plane for an hour due to taxing and no gate.

I really would like it if they provided at least some limited free wi-fi.

The seats were extremely small. Boarding was not communicated correctly. It wasn’t a pleasant trip.

Loved the food. No wheelchair was provided in Sofia even though wheelchair assistance was confirmed by Turkish Airlines

Excellent food and service on my international flight. Most notable is the food provided by Turkish even for coach passengers is very good.

Food is very turkish. No regard for other natinalities taste and preference. The entertainment can be improved- it was the same menu on 10/8/25 and 10/25/25. The boarding is the worst in the airline industry- I suggest you ask your staff to and watch how other airlines do it.

We couldn’t fly to Chicago on our booked flight. The flight was overbooked.

Took forever to board. They made announcements without the loudspeaker and since the waiting room was full of screaming kids, no one could hear what they were saying. The business class sleeper seats were designed for tall skinny people. When partially reclined there was nowhere to rest my feet because they did not reach the footrest. and when fully reclined there wasn't room at my sides for my arms. Definitely one of the worst sleeper seats I have ever had.

About an hour delay but we made it to Chicago. I feel that the smaller connecting flights are the ones that cause the delays on the bigger planes that fly international.

One of the best flights I have been on in a while.

The flight crew were very helpful. The seats were very close together. There was barely room to sit without touching the person next to you.

I’m an EP on AA every year for more than a decade but this was a very pleasant and surprising experience. Clean and sizable plane for HOU to CHI. 5 row first class. And excellent food in first class the steak option was really good. Your flight attendants even better. Seat 5A

Gluten free snack options and meals that offer both gluten free and dairy free.

Not a bad flight but a long delay boarding and taking off due to the pilot not arriving on time.

I would have preferred a flight voucher and to hop on a different flight. Delayed over 6 hours.

I almost missed my connection in Chicago due to having to wait on a gate to be open I am assuming. Having to run from E terminal to C terminal and I barely made it there before they closed the door. This may not be the actual airline's fault it's crazy how there is so little time between flight especially when they are placed so far apart in the airport.

The Wi-Fi did not work, so you weren't able to watch entertainment on your own device. They did not have wired headphones so you couldn't watch it on the in-seat entertainment screen either. There was plenty of time to do a drink and snag service but the flight attendants chose not to.

Short flight, crew and staff very efficient. Over all good flight experience.

Inoperable monitor left no entertainment for 9 hours. The crew was not helpful. Food was awful.

I was not aware that I have to pay for the checked bag on the return flight. It was included in the price when I bought the ticket

Food was terrible. Bamboo utensils are just not working out. A lot of plastic waste. Pillows and blankets were not good, a lot of static electricity. Crew did their job well.

Original Lufthansa flights were canceled and the alternative route that was offered required cab transfer in New York from JFK to Newark at my own expense. Who can refund these $218?

flight was packed, had to check my carryon bag, tiny snack bag offered, but we arrived on time and thats what counts

Expect Business Class seating to be 2 passengers per 3 coach seats, with center blocked. This is typical for flights within Europe on most airlines. Service was excellent!

They gave us chocolates twice (for whoever would like an extra chocolate - kids did!). I asked for an extra water, and I was given one. Crew was very friendly!

My mother is 87 years old and has knee problems. I have reserved a wheelchair indicating that she is immobile. For her it is very difficult to walk short distances. On arrival in Frankfurt, I was called via my mother's phone, by the female employee who had my mother in a wheelchair. She asked me how many and what color suitcases she has, which I explained. I was very surprised when 15 minutes later my mother walked out with her cane and balancing with great difficulties assisted by a young couple who were pushing her suitcase. Where was the wheelchair and the airport employee? I find this to be a disrespectful and abusive behavior of elderly people. It also raises the question of professional misconduct of the airport personnel in Frankfurt i.e. the female employee who abandoned an 87 year old immobile person by the luggage lane. I would like to inquire about the details i.e. name of that employee.

Crew was nicer to some people than others for no apparent reason. I had to get an older lady’s attention because she was too busy talking to passengers.

The flight was wonderful, especially the special assistance from airplane to airplane!

All flights cancelled with no way to reach the airline

The passenger next to me Goran Goranov (elderly man in his 70s on his way to visit his children and grandchildren in Washington, DC) dropped his neck support pillow while boarding - none of the ground crew helped him. He subsequently lost his green card somewhere on the plane or on his way to the other airplane. I hope he found it. I am worried about him. His son had requested an agent to wait for him at the gate - nobody was there when Mr. Goranov came out of the plane Sofia- Frankfurt. Other passengers had to help him get to the next gate for Washington, DC. I hope Mr. Goranov found his Green card and got safely to Washington, DC to spend time with his family during the holiday season.

Everything you need to know for your flight from Sofia to Chicago

Information on your arrival and departure airports