SOF - ORD

$326 Find Cheap Flights from Sofia to Chicago O'Hare Airport

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 O'Hare Intl departing on 5/6. 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.
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KAYAK searches hundreds of travel sites at once for deals on flights to Chicago O'Hare Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sofia to Chicago.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sofia to Chicago.
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Cheap Flights from Sofia to O'Hare Intl

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Sofia to O'Hare Intl 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.

Recent round-trip flight deals from Sofia to O'Hare Intl

KAYAK's recommended round-trip deals from the most popular airlines that fly from Sofia to O'Hare Intl.
Discover the best prices for you by selecting your travel dates on KAYAK.
 Logo
7:00 am - 2:10 pmSOF-ORD
15h 10m1 stop
 Logo
5:10 pm - 2:00 pmORD-SOF
12h 50m1 stop
Tue, Jun 24 - Sat, Jul 19
LOT Logo
5:20 am - 3:10 pmSOF-ORD
17h 50m1 stop
LOT Logo
9:40 pm - 2:00 amORD-SOF
20h 20m1 stop
$617LOT
Find Deal
Sat, May 31 - Sat, Jun 7
KLM Logo
7:00 am - 2:10 pmSOF-ORD
15h 10m1 stop
KLM Logo
4:20 pm - 2:00 pmORD-SOF
13h 40m1 stop
$622KLM
Find Deal
Thu, May 15 - Thu, May 29
United Airlines Logo
6:15 am - 6:22 pmSOF-ORD
20h 07m2 stops
United Airlines Logo
9:40 pm - 11:00 pmORD-SOF
17h 20m1 stop
$674United Airlines
Find Deal
Wed, May 14 - Tue, May 20
United Airlines Logo
6:15 am - 3:50 pmSOF-ORD
17h 35m2 stops
United Airlines Logo
5:56 pm - 5:50 pmORD-SOF
15h 54m2 stops
$682United Airlines
Find Deal
Mon, Jun 23 - Thu, Jul 17
Lufthansa Logo
6:00 am - 2:00 pmSOF-ORD
16h 00m1 stop
Lufthansa Logo
9:40 pm - 11:00 pmORD-SOF
17h 20m1 stop
$696Lufthansa
Find Deal
Wed, Jul 23 - Sun, Aug 3
Lufthansa Logo
1:50 pm - 7:55 pmSOF-ORD
14h 05m1 stop
Lufthansa Logo
9:40 pm - 6:40 pmORD-SOF
13h 00m1 stop
$697Lufthansa
Find Deal
Mon, Jul 21 - Mon, Aug 4
Turkish Airlines Logo
9:15 pm - 9:40 amSOF-ORD
20h 25m1 stop
Turkish Airlines Logo
11:45 pm - 2:45 pmORD-SOF
31h 00m1 stop
$722Turkish Airlines
Find Deal
Sun, Jul 27 - Sat, Aug 9
Turkish Airlines Logo
9:15 pm - 9:40 amSOF-ORD
20h 25m1 stop
Turkish Airlines Logo
11:25 am - 8:35 amORD-SOF
13h 10m1 stop
$1,003Turkish Airlines
Find Deal
Sun, Jul 27 - Thu, Jul 31
KLM Logo
7:00 am - 6:07 pmSOF-ORD
19h 07m2 stops
KLM Logo
1:30 pm - 2:00 pmORD-SOF
16h 30m2 stops
$1,099KLM
Find Deal
Thu, Jul 24 - Fri, Aug 1
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KAYAK's insights & trends for Sofia to O'Hare Intl flights

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

What’s the cheapest day of the week to fly from Sofia to Chicago O'Hare Airport?

The average price of all round-trip flights from Sofia to Chicago O'Hare Intl Airport clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Sofia to Chicago O'Hare Airport, look for departures on Wednesdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Chicago O'Hare Airport, Thursday is the cheapest day to fly and Monday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sofia to Chicago O'Hare Intl Airport, 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 O'Hare Intl Airport is November, where tickets cost $660 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is $864 and $802 respectively.

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

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 O'Hare Intl Airport, 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 O'Hare Intl Airport, you should book around 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonMarch
High seasonJuly
Cheapest flight$326
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from Sofia to Chicago O'Hare Airport

When to book flights from Sofia to O'Hare Intl

Are your dates flexible? Find out the best times to travel from Sofia to O'Hare Intl 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 Sofia to Chicago O'Hare Airport flights

  • What is the cheapest flight from Sofia to Chicago O'Hare Intl Airport?

    In the last 3 days, the lowest price for a flight from Sofia to Chicago O'Hare Intl Airport was $326 for a one-way ticket and $615 for a round-trip.

  • Do I need a passport to fly between Sofia and Chicago O'Hare Airport?

    Yes

  • Which airports will I be using when flying from Sofia to Chicago O'Hare Airport?

    When flying out of Sofia you will be using Sofia. You will be landing at Chicago O'Hare Airport, also known as Chicago O'Hare Intl.

  • Which aircraft models fly most regularly from Sofia to Chicago O'Hare Airport?

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

  • Which airline alliances offer flights from Sofia to Chicago O'Hare Airport?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Sofia and Chicago O'Hare Airport, with Star Alliance 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 $759 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 $627 and an overall rating of 7.6.

  • How does KAYAK find such low prices on flights from Sofia to Chicago O'Hare Airport?

    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 O'Hare Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport 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 O'Hare Airport?

    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 O'Hare Airport with an airline and back to Sofia with another airline. Booking your flights between Sofia and ORD can sometimes prove cheaper using this method.

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

    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 O'Hare Airport from Sofia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top 5 airlines serving from Sofia to O'Hare Intl

 
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 O'Hare Intl? 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 1334 reviews
7.8Boarding
8.4Crew
7.2Food
7.1Entertainment
7.7Comfort
Airline reviews

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

8.0 ExcellentShereen, Apr 2025AMS - YUL
Read more KLM reviews

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

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

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

You should not have to pay for WiFi in business class

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

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

They only had vegetarian food left on the flight which I wasn’t happy about. I didn’t get any food to eat at all.

The customer service rep on chat refused carrying golf set at no charge that is customary for LOT and others. I wanted yo carry just ONE club not even full set! Web check in was nightmare. Most horrible lounge at warsaw. To call it business class is a BIG exaggeration. Rude staff warsaw to nyc. Seats uncomfortable and not flat as is now customary. Bad content and entertainment system.

Seats were so uncomfortable, my butt hurts so much, I wish they have more cushions,it really was horrible, Except that, Stewarts were polite food was decent

The 737 lacked business-class seating. It was basically economy plus but with the middle seats left unsold. There were no TV screens but good food and service.

Plane is super outdated, seats not that comfortable for business class. Lounge also out dated. They need to catch up to 2024. Don’t think I’d ever fly again.

Everything was good, flight was smooth and on time Like service

Boarding was impossible to navigate. Had mobility issues and a business class ticket, but still boarded almost at the end of the queue because there was absolutely no organization or assistance.

Aircraft was new. Food so so, especially vegetarian was very disappointing.

Very courteous staff. Abnoxious passenger in front of me who reclined her seat all the way without warning and without considering the person behind her. My flight ORD-WAW was so much more pleasant because of the courtesy of the passenger in front of me.

LOT told me on my first flight that I had missed boarding my second flight and told us to go to a service desk to reschedule. We then were told our flight was still boarding and that we had to run through the Warsaw airport to catch it which is just a long long runway airport. The workers at the airport were not helpful at all and you have to go through two passport checkpoints. I have asthma and was almost dead when I got on the plane and no one helped or gave us water or even acknowledged us. The flight was fine - the crew members are not friendly so it’s a very functional flight at best. Also my bag didn’t make it to my final destination.

LOT was very disorganized at Istanbul airport with no communication with travelers. Our flight was delayed over and hour and a half and there were no announcements, displays or anything about it. It almost left me missing my second flight!

So far so good but food and entertainment are not available for this flight

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

Very modern plane. Good seat spacing. Meals were good. Screens had tons of movies and worked

There's just no way to sit fully upright and comfortably in these seats. There needs to be 2 more inches of room, and that's not something that only one person on the flight needs - the whole flight needs 2 more inches of room. If that means you sell 6 less seats, so be it. It's too close for anyone. Forcing people to pay for "premium" economy just to get "barely enough space to breathe" isn't really an answer to that.

The crew were very nice. The Chocolate is good and v there’s no entertainment. Thanks

The crew were very nice. I would have appreciated a pillow for comfort. I had a special meal that was sloppy, but the salad was great. Thanks

The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.

Flight was delayed two hours. No snacks and no tv screens. My bag got stuck in Chicago

The check in process at Istanbul airport caused my family a great deal of stress and disappointment due to the following factors: 1) WE HAD TO PAY US$330 for check on bags, despite holding Economy tickets that Turkish airlines website clearly states that flights from Istanbul to Miami had a 2 checked bags allowance. 2) Airport staff not only lacked empathy for senior travelers (75 yrs old and 71 yrs old), but were also rude as well. The supervisor at check it offered "if you don't pay for the bags, you can just remain and sleep at the airport for however long you wish. What a terrible way to treat customers !!! 3) We were bumped from agent to agent to agent FIVE times, showing everyone the communication we received telling us we had the 2 bags entitlement. Two elderly people lugging 4 suitcase around and around the Turkish terminal. Again, what a sad way to treat customers !!! 4) We need a case opened to get a refund for the amount we paid. Something is amiss, screams unethical, and sounds unscrupulous......At First , we were told we must pay for 4 bags. All of a sudden, it became 2 bags, and finally all 4 bags were checked on with payments demanded for 2. Why did it vary from agent to agent???? 5) OVERALL, A TERRIBLE AND SUSPICIOUSLLY UNSCRUPULOUS EXPERIENCE FLYING WITH TURKISH AIRLINES. WE ARE TERRIBLY DISAPPOINTED AND SAD THAT OUR VISIT TO A BEAUTIFUL CITY ENDED IN SUCH A HORRIBLE EXPERIENCE

I recently flew with Turkish Airlines, and I can confidently say it was one of the best travel experiences I’ve ever had. From the moment I boarded, the crew was incredibly attentive, warm, and professional. They went above and beyond to ensure everyone was comfortable and well taken care of throughout the flight. The highlight, however, was the food! I’ve flown with many airlines, but Turkish Airlines sets the bar incredibly high when it comes to in-flight dining. Every meal was fresh, flavorful, and beautifully presented. The variety of dishes, even on a long-haul flight, was impressive. It felt like dining at a high-end restaurant at 35,000 feet! The seats were comfortable, the entertainment options were great, and the overall atmosphere made the journey enjoyable. Turkish Airlines truly excels in combining luxury and hospitality. I wouldn’t hesitate to fly with them again—highly recommend!

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

Here's a sample answer: "Honestly, I was really impressed with Turkish Airlines, but if I had to suggest one area for improvement, it would be: - *More efficient boarding process*: I noticed that boarding took a bit longer than expected, which might be frustrating for passengers with tight connections.

Not worth pay business class and get service economy class

In this long haul flight, flight attendants never stopped moving and giving excellent service. Very impressive. Very comfortable seats and excellent food

In sharp contrast to the modern glitzy airport, boarding facilities were primitive. Passengers had to board buses and walk up steep stairs in bitter cold with carry-on baggages. I found no reason why aerobridge was not provided.

Service and food were decent, seats are a bit too narrow. Leg room is normal. Bathroom should be cleaned more frequently. WiFi is cumbersome and should be simplified.

they have cancell the flight with no reasons, My parents were in the cold weather in the airport for 24 hours they did not give any hotel and food. I hate Turkish Airline, this is our last time that we ha ve chosen Turkish Airline.

Same as before boarding process and lack of crew experience in the process

I wish seats were not reclinable. It's so claustrophobic when the person in front of you spends most of a nine hour flight leaned all the way back. The crew was really nice though and the dinner (red Thai curry) was pretty compelling.

Our flights were severely delayed, then canceled and we had to fly out next day with no sleep accommodation help. This led to our baggage being lost and the service reps after baggage couldn’t be bothered to help. They kept sending us to different counters when we were at the right counter to begin with. The only saving grace was the angel woman supervisor with blond hair who helped us put in a missing baggage claim.

The boarding system was all bogus - employees at the boarding gate were not sound like proffesional or may be possibly rational

I got an email in the morning of the flight 1/7, from Kayak, that I was rebooked from UA 906 to LH 430. Nobody at Lufthansa ot United knew about this. I went to both counters. at the airport. Also, Cheap Flights, who I booked the ticket through, did not know. I ended up staying on the United flight. But this was very disturbing, since I got a very late notice that I was rebooked to an earlier flight, I hurried to the airport to find out after a lot of inquiring that this was a mistake. Not a good Kayak experience.

After living in Europe for five years and flying with Lufthansa and KLM airlines, I’ve realized that United Airlines is now a budget carrier. The flight attendant are not friendly. The seats are not comfortable. And everything comes at a cost. I will be flying with KLM and Skyteam like Delta to the US going forward no doubt. United Airlines is not what it once was:

Delayed take off but I think they waited for passengers.

I had to fly United where the flight crew was atrocious

Flight was delayed for no reason and I missed my connection. This added another day of travel and I missed an event I was traveling home for.

I traveled with my sister, however ,we booked a flight separately, and we don't sitting next to each other. The staff on the board where on the top of this unit they find us sitting together. Ty lufthansa team. U are the best

Courtesy of waitress. Could improve on time management and check-in

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