CHI - SOF

$250 Find Cheap Flights from Chicago to Sofia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to Sofia departing on 3/2. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Sofia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Sofia.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Sofia.
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Everything you should know

Cheapest round-trip
$550
Overall average: $686
Turkish Airlines
Wed 4/15Sat 4/25
ORD - SOF • 1 stop
Cheapest one-way
$250
Typical prices: $460-$522
Multiple Airlines
Mon 3/2
ORD - SOF • 3 stops
Top airlines
Turkish Airlines
Cheapest • from $575 (round-trip)
LOT
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
February
Cheapest • 22% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Chicago to Sofia (CHI-SOF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Chicago to Sofia 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 Chicago to Sofia

Wed, Apr 15 - Sat, Apr 25
Turkish Airlines Logo
11:25 am - 3:00 pm
ORD
-
SOF
19h 35m1 stop
Turkish Airlines Logo
9:05 pm - 6:15 pm
SOF
-
ORD
29h 10m1 stop
$550Turkish Airlines
Tue, Jan 20 - Sun, Feb 8
Turkish Airlines Logo
11:50 am - 8:50 pm
ORD
-
SOF
25h 00m1 stop
Turkish Airlines Logo
9:35 am - 10:05 am
SOF
-
ORD
32h 30m1 stop
$551Turkish Airlines
Tue, Jan 20 - Sun, Feb 8
Turkish Airlines Logo
11:50 am - 3:10 pm
ORD
-
SOF
19h 20m1 stop
Turkish Airlines Logo
4:00 pm - 10:05 am
SOF
-
ORD
26h 05m1 stop
$553Turkish Airlines
Mon, Apr 6 - Wed, Apr 22
Turkish Airlines Logo
7:50 pm - 3:00 pm
ORD
-
SOF
35h 10m1 stop
Turkish Airlines Logo
9:05 pm - 9:40 am
SOF
-
ORD
20h 35m1 stop
$554Turkish Airlines
Tue, May 5 - Tue, May 26
Turkish Airlines Logo
11:25 am - 8:45 am
ORD
-
SOF
13h 20m1 stop
Turkish Airlines Logo
9:35 am - 6:15 pm
SOF
-
ORD
16h 40m1 stop
$555Turkish Airlines
Wed, May 6 - Wed, May 27
Turkish Airlines Logo
11:25 am - 8:45 am
ORD
-
SOF
13h 20m1 stop
Turkish Airlines Logo
9:05 pm - 9:40 am
SOF
-
ORD
20h 35m1 stop
$557Turkish Airlines
Fri, Jan 30 - Wed, Feb 18
Multiple Airlines Logo
1:49 pm - 1:55 pm
MDW
-
SOF
16h 06m2 stops
Multiple Airlines Logo
7:00 am - 5:45 pm
SOF
-
MDW
18h 45m2 stops
$624Multiple Airlines
Sat, Apr 18 - Thu, Apr 30
KLM Logo
1:10 pm - 2:00 pm
MDW
-
SOF
16h 50m2 stops
KLM Logo
7:00 am - 5:54 pm
SOF
-
MDW
18h 54m2 stops
$629KLM
Thu, Jan 29 - Thu, Feb 5
KLM Logo
1:49 pm - 2:05 pm
MDW
-
SOF
16h 16m2 stops
KLM Logo
7:00 am - 5:29 pm
SOF
-
MDW
18h 29m2 stops
$630KLM
Sat, Jan 31 - Sat, Feb 28
KLM Logo
1:26 pm - 2:05 pm
MDW
-
SOF
16h 39m2 stops
KLM Logo
7:00 am - 4:14 pm
SOF
-
MDW
17h 14m2 stops
$631KLM
Booking Insights

KAYAK's insights & trends for Chicago to Sofia flights

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago to Sofia, 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 Chicago to Sofia is February, where tickets cost $565 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,144 and $975 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chicago to Sofia, 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 Chicago to Sofia, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$250
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 16% increase in price.
Flight from Chicago O'Hare Airport to Sofia

When to book flights from Chicago to Sofia

Are your dates flexible? Find out the best times to travel from Chicago to Sofia 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 Chicago to Sofia

  • Does SOF have an on-site hotel?

    If you intend to stay at a hotel within SOF grounds, you're in luck, as the airport boasts the Ibis Sofia Airport. A 10min walk from Terminal A, this hotel boasts elite rooms. Thus, it's safe to say that your comfort is guaranteed at this hotel.

  • How can I move from Terminal 1 to 2 at SOF?

    In case you'd like to move from Terminal 1 to 2, or vice versa, you can board the free shuttle bus that connects these terminals. Daily, this bus operates from 5 am to 11 pm. It covers the route every 15min.

  • Are there nursing rooms at ORD?

    If you'd like to breastfeed your infant while waiting for your flight to Sofia at ORD, you need not worry about struggling to find a private space to feed your baby, as ORD features several nursing rooms. The said nursing rooms are near Gate B10 in Terminal 1, on the walkway between Gates E5 and F9 in Terminal 2, near the Urban Garden in Terminal 3's rotunda, and a short distance from Gate M14 in Terminal 5.

  • Where can I get assistance at MDW?

    If you need assistance at MDW, you should visit the airport's information desk, situated at the Main Entrance of the airport's terminal. At this desk, you'll get all the help you need, as it is manned by informed airport staff.

  • What is the cheapest flight from Chicago to Sofia?

    In the last 3 days, the lowest price for a flight from Chicago to Sofia was $250 for a one-way ticket and $550 for a round-trip.

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

    Yes, you’ll need a passport to travel to Sofia from Chicago.

  • Which airports will I be using when flying from Chicago to Sofia?

    When flying out of Chicago you will be using one of these airports: Chicago Midway or Chicago O'Hare Intl. You will be landing at Sofia.

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

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

  • Which airline alliances offer flights from Chicago to Sofia?

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

  • What is the most popular layover when flying to Sofia from Chicago?

    Istanbul is the most popular layover city among KAYAK users traveling from Chicago to Sofia.

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

    The two airlines most popular with KAYAK users for flights from Chicago to Sofia are KLM and Austrian Airlines. With an average price for the route of $782 and an overall rating of 7.7, KLM is the most popular choice. Austrian Airlines is also a great choice for the route, with an average price of $914 and an overall rating of 7.6.

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

    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 Chicago to Sofia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Chicago 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 Chicago to Sofia?

    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 Sofia with an airline and back to Chicago with another airline.

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

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

KAYAK’s top tips for finding a cheap flight from Chicago to Sofia

  • In Chicago, you can board your flight to Sofia at Chicago Midway International Airport (MDW) or O'Hare International Airport (ORD). If you'd like to fly cheaply to Sofia, ORD is the airport for you, as it serves the cheapest flights from Chicago to the Bulgarian capital. On the other, if you'd like to board your flight at an airport where you'll encounter the least traffic, MDW is the airport for you.
  • On the day you're set to fly to Sofia from ORD or MDW, you should get to your Chicago airport of choice at least 2h ahead of your flight. This will give you adequate time to go through the airport's security checkpoints in time for your flight. It will also give you enough time to check out the airport's points of interest.
  • All airlines traveling from ORD and MDW to Sofia Airport (SOF) offer elite-assisted travel services to passengers with disabilities, provided that the said passengers contact them at least 72h before their flight. Therefore, if you have special needs and require special in-flight services, you should contact the airline you plan on traveling with from your preferred Chicago airport to Sofia at least 72 before your flight.
  • To be able to purchase items and pay for services easily while in Sofia, you should convert some of your cash to Bulgaria's local currency at one of SOF's currency exchange sites run by ICE Exchange. Two are located in 2, while one is found in Terminal 1.
  • SOF features locations for car rentals like Avis, Budget, SIXT, Thrifty, Europcar, and Enterprise in Terminal 2. This being the case, if you'd like to hire a car once you land at SOF, you'll have a variety of car rental agencies to choose from.

Reviews of the top 5 airlines serving from Chicago to Sofia

 
See real verified KAYAK customer reviews for airlines flying from Chicago to Sofia. 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 Chicago to Sofia? 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.
7.5
LOTOverall score based on 1162 reviews
7.1Food
6.9Entertainment
7.6Boarding
7.4Comfort
8.2Crew
Airline reviews

Stuck on a plane for 6 hours due to a technical or mechanical issue.

2.0 MediocreJacek, Jan 2026
ORD - WAW
Read more LOT reviews

Stuck on a plane for 6 hours due to a technical or mechanical issue.

Horrible communication, flight boarded then we sat on plane for almost 5 hours as the runway was barely covered in snow with no plows in sight and the as we tried to taxi there was a major equipment failure due to poor push off technique causing all passengers to be taken off the flight to ultimately have the flight cancelled. There was barely any communication to passengers as to what was happening or what to do next to get placed on another flight. Arriving to my final destination a whole day later having to take a connecting flight through Lisbon to ultimately end up in New York instead of a direct flight as none available for the next day. Never flying LOT airlines again!

Boarding was a madhouse. Airport staff was completely disinterested in communicating about the delays. Never again.

The seats are very narrow. Communication regarding bids for better seating could be better

Although I was flying in business class, the feeling, comfort and in general the whole experience was like flying in a low cost airline. Boarding by. Us, no priority to business class passengers. The plane was very old and looked poor and rely old. Seats do not recline. Space between rows very small. No separation between business class and economy. No separate toilet for business class passengers. Of course no entertainment, no WiFi and no charging. Very bad experience

Smooth flight, excellent crew and good food. Not enough space; sitting are too small.

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

Boarding was delayed for an unknown reason for more than an hour. While the airplane was at the gate, the boarding time was moved by 10-20 minutes every 15 minutes. No entertainment on the plane.

The flight itself was pleasant and on time. Crew was very good. However, breakfast food was barely acceptable. Unfortunately this satisfies the recent industry standards. I asked for a sandwich with ham (another choice was cheese), but received a sandwich with roast beef.

During the flight, the fleas biting me in the plane.

Made us gate check carry ons Then didn’t get them on the plane. Service they used didn’t deliver our carry ons for more than a day Total mess

Horrible!! The WiFi was not working, the food was awful

We’ve never been more uncomfortable on a flight than we have on this particular one. The seats in front of us reclined so far back that when the person reclined their seat of broccoli, it almost hit me in the face and left me with literally no room to move that said I had to recline my seed in which made the person behind me upset. It seemed like the seats also would recline without even pressing the button in the armrest and would unrecline as well for that same reason, and it also seemed that some seats reclined more than others. The bottom cushions of the seat were so thin that even after one hour of an 11 hour flight, our tailbones were so sore. It seemed like an overall old airplane. It also didn’t have individual air vents and it was extremely hot the entire flight. Several passengers were commenting on how hot it was. The breakfast was some kind of flavorless triangle, puffy egg, laying in a watery bed of steamed peppers and onions and spinach. It was not appetizing at all. The flight crew was extremely nice so that was a nice thing this flight attendant. They let us try different types of Swiss sodas, which was really nice and the dinner was actually delicious but still overall given the other considerations. It was pretty much a miserable flight without basic seat comfort.

At boarding, the locations where we had to have our passports checked prior to boarding were very unclear. Occasional staff wandered around telling people, but in busy area of the terminal this was not obvious. It was also located well after the check in desk in terms of walking to the gate. The Premium Economy service was attentive and warm. The only big draw back was lack of restrooms, and no division or even curtain between PE and Economy.

Food used to be better and comfort was not attainable after 5 hours everything starts hurting.

horrible.. they cause such a problem and my daughter 14 years old was stranded in san francisco

I can’t even the whole trip was a catastrophe

Poor. Seats uncomfortable. No leg room. Hot and humid the whole trip. Food and staffs were ok.

The seats were so close together, when the man in front of me put his seat back, the screen in front of me was 9 inches from my face. There is no way to lean forward if I needed to pick something up. It was pretty uncomfortable for a ten hour flight. I was very surprised.

The food was good. Most the staff was pleasant. The flight would be drastically improved with WiFi on a long international flight.

I understand weather is an issue, but making us chase our plane down at five scheduled gates across three terminals in an airport the size of O'Hare was unfair. They'd have probably been better off to leave gates as TBD until the inbound plane is in final approach instead of running us all over the place. Also, props to the consistently-unprepared ground crew in Richmond for once again leaving my lane parked short of the gate because they couldn't have a crew in place on time with 2 hours notice...

cabin crew was OK, food was OK, the trip from the US to Munich was actually pretty bad comfort wise. Noisy aircraft, lights never dimmed even in Business class (night flight) barely sufficient amenities for the price. I have millions of miles with United but TBH American is gaining ground and Delta has always been marginally better then United although on paper United has more longes and cheaper upgrades.

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

Not United Airlines' fault. It's ORL airport's fault.

Great flight. On time boarding. Smooth flight and on time arrival at EWR. The flight crew was marvelous and there was a great selection of movies on the entertainment system. Our bags were at the carousel before we got there. Another excellent flight from United.

I liked the snacks and the flight attendants were friendly.

The movies offered were great. Staff were very pleasant and very efficient.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

Very thoughtful flight attendant offered me water immediately since I had run to make my connection.

Turkish Airline canceled our tickets in the very last minute, with our luggage and everything else, all prepared and good to go. It’s clear that they sold the tickets for better money to someone else. Bad, Bad, Bad business!!!

Awful seating. Bad food. Staff only have one bottle of water and no cans.

it was like a banya -so hot... They did provide a great experience with special food. one toilet broke midflight In general it was a peaceful and relaxing flight - for business class it was good.

Chicago to Istanbul was a much better experience than I expected since I’m more accustomed to Qatar Airways business class. The business lounge in the Istanbul airport was amazing - loved the lockers and phone charging stations, and the bathroom was a spa experience in itself. The onward leg from Istanbul to Karachi was utterly disappointing. Terrible plane, and I felt like I was in economy - the seats don’t come near to lying flat and the food was mediocre. What a sad downgrade - it isn’t as though the ticket on that leg was cheaper. So, on that front, there’s no contest with Qatar airways.

Second leg of Turkish Airline with Indigo is disaster for following reason. 1) You have to carry your cabin bags through ladder to boeing 777 because it was parked somewhere in parking lot and was not given a gate to board passengers and this seems to be people traveling to and fro from those flights and is not issue with flight itself. 2) I choose non vegetarian food on Turkish portal way ahead of checkin to entire trip, However the Indigo flight gave me random veg food saying they code veg food code from Turkish. 3) Indigo did not served any alcoholic beverages stating some weird reason which is non nonsensical. 4)Indigo have TV screens in front of you but it displays nothing except "Welcome Onboard" with annoying white black ground in dark flight. This is the most stupidest and annoying part because you are held hostage for 7 hours and only thing you could do is stare back at white screen which does not have entertainment package or even flight tracker. Such a shame.

nice and clean plane but the seats and the comfort was not what i expected. i expected more based on all the ads and reviews that i've read. I guess you get what you pay for in economy.

Overall it was good. Food was bad. I ordered gluten free vegetarian meal. But I got gluten free chicken for my long flight from Seattle to Istanbul. I don’t eat any kind of meat. Second meal I got eggplant with meat which I couldn’t eat. I don’t understand why we can’t get gluten free vegetarian meal for a 12 hour flight. I eat the bread and that was it.

Worse worse worse, i would not recommend this airline to anyone. Istanbul airport maybe State of the Art facility but staff is rude, only works if they get tips, and they push you to give tips even though my family had spent $50 in tips. Airline staff doesn't speak english so you really can't understand them. It was a nightmare travelling with Turkish. Never again.

As a big guy the seats are way too small for me. Would prefer more comfortable seats on these long haul flights.

My flight was canceled 1 minute before boarding. The customer service was owful, no one could tell us what was going happened. I spent 30hrs instead of 15 from Washington DC to Brussels. No apologie or help

Crew was professional and great, flight was clean. However food was pathetic. I ordered a Hindu meal assuming no meat but they served chicken. Need to be very specific- Hindu meal should be categorize as Vegetarian - no meat or egg. Or it should be specific that we are serving meat.

Late flight Delays Poor service Poor staff Worst airline ever

Ground staff and cabin crew were excellent. Flight was perfectly on time. Zero issues.

Even after a delay, getting off the ground, thanks for keeping me safe, the airline made certain that my connecting flight was rebooked to get me to my final destination. It was actually rebooked twice, and my luggage still managed to meet me. The airline gave me a credit for food and beverage to be used at the airport vendors, regretfully, the credit did not transfer to my final boarding pass. Oh, well…

Trip was smooth, good drew, average meal, almost cold coffee. Excellent landing. Did not enjoy going down the stairs, walking to the gate, walking up the stairs, going a long walk to the exchange gate, and going down the stairs again to be bussed all the way where we originally landed to take our next flight! Over all an average experience. Thank you.

I booked extra leg room, due to seat neighbor i now consider extra shoulder and arm room as well. Seems like the seats shrink in width now The crew was very friendly and professional ( 100%). Food was good not great, breakfast was bad, a dry slice of bread would have been better. Facilities clean.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

I liked Quiet people around me. Crew could have helped people with overhead luggage so they aren't moving other peoples bags around and causing problems for people that had there bags there first

The plane was delayed by two hours in Chicago which led to us missing the next flight. Lufthansa rebooked the flight and booked us a hotel for the night in Frankfurt. The level of customer service and getting us taken care of was superb. The flight crew and the service on the ground was superb.

The row of seats were so cramped it was difficult to get in and out of your seat. I even upgraded. A long flight and sad accommodations 😵‍💫 the shorter flight was very comfortable and the seating was spacious

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

Information on your arrival and departure airports