$289 Find Cheap Flights from Chicago to Bulgaria - Compare and Save

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Price, demand and travel trends for Chicago to Bulgaria flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Are flights from Chicago to Bulgaria cheaper or more expensive than last year?

Fares from Chicago to Bulgaria are running about 9% higher than they were around this time last year, averaging $936 round-trip.

What are the cheapest fares from Chicago to Bulgaria right now?

The cheapest fares from Chicago to Bulgaria on KAYAK in the last week were to Sofia (SOF) from $675 round-trip, and to Varna (VAR) from $700 round-trip.

What’s the cheapest month to fly from Chicago to Bulgaria?

February is the cheapest time of year to fly, with average fares of $597. Prices are highest in June, when average flight costs increase to around $1,193.

When is the best time to book flights from Chicago to Bulgaria?

Book your flights 25 weeks before your trip. KAYAK data collected over the past 12 months shows that booking in this window can save you around 31% compared to booking last-minute (within 2 weeks of departure).

Which airport in Bulgaria is the cheapest to fly to from Chicago?

Based on KAYAK data from the past 12 months, the cheapest airports to fly into Bulgaria are:

• Varna (VAR) (avg. price $901)
• Sofia (SOF) (avg. price $914)
• Bourgas (BOJ) (avg. price $966)

What’s the cheapest day to fly from Chicago to Bulgaria?

Sunday tends to be the cheapest day to fly from Chicago to Bulgaria, while Thursday is the most expensive. Fares run about 14% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from Chicago to Bulgaria?

Data from the past 12 months shows it's cheapest to fly to Bulgaria during the morning with average prices of $735. The afternoon is the most expensive time to fly, with average prices of $1,002.

Key details for Chicago to Bulgaria flights

Low season

February

Cheapest flight

$306
Beat the crowds with an average 64% drop in travelers.
The most popular month to fly with an average 117% increase in travelers.
One-way flight from Chicago O'Hare Intl Airport to Sofia

Your Chicago to Bulgaria flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Chicago to Bulgaria?

    Yes. Fares from Chicago to Bulgaria are low right now. As a rule of thumb, a round-trip under $718 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from Chicago to Bulgaria?

    Over the past 12 months, round-trip fares from Chicago to Bulgaria have ranged from $718 to $1,161.

  • What are the main airports serving Bulgaria?

    Bulgaria has 4 airports. The three busiest are Sofia (SOF) (95% of arrivals), Varna (VAR) (4%) and Bourgas (BOJ) (1%).

  • What airlines fly nonstop from Chicago to Bulgaria?

    Based on the flight schedule for the next 3 months, no airline regularly operates nonstop flights from Chicago to Bulgaria. One-stop options include:

    • Turkish Airlines
    • United Airlines
    • Lufthansa

  • Which cabin classes are available on flights from Chicago to Bulgaria?

    On flights from Chicago to Bulgaria you can book Economy Class, Premium Economy Class or Business Class.

  • What are some popular landmarks in Bulgaria?

    KAYAK travelers' favorite landmarks in Bulgaria include:

    • Vasil Levski National Stadium
    • National Palace of Culture
    • Central Sofia Market Hall
    • Prince Alexander of Battenberg Square

Your guide to booking Chicago to Bulgaria flights

Get tips on when to book, when to fly and what to know before your trip.
  • If you can plan ahead, the sweet spot for booking your flight is 25 weeks before your trip. KAYAK data shows fares in this window are around 31% lower than last-minute bookings (made within 2 weeks of departure). Not ready to commit? Set a Price Alert and we'll let you know when prices change.
  • If your travel dates are flexible, book your trip for February when flights are typically cheapest and avoid June when prices are at their highest.
  • Flying on Sunday is usually the cheapest. Flights on Thursday cost about 14% more on average, so being flexible with your travel dates could help you save.
  • If you're looking to save, Varna (VAR) is the cheapest airport to fly into from Chicago. If you have onward travel, don't forget to factor in the cost of your journey by train, bus or domestic flight.
  • Start your trip in Sofia, which is the most popular destination in Bulgaria. From there, it's easy to continue on to other popular destinations such as Varna, Sunny Beach and Bansko.

Reviews of the top 5 airlines serving from Chicago to Bulgaria

 
Need help choosing which airline to fly with from Chicago to Bulgaria? 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 1191 reviews
7.5Comfort
7.2Food
8.2Crew
6.9Entertainment
7.6Boarding
Airline reviews

Old plane excellent svce and good Entertainment system broken from the start

10.0 ExcellentPiotr, Oct 2026
Read more LOT reviews

Old plane excellent svce and good Entertainment system broken from the start

Food seats were good Flight was delayed for over an hour, missed connecting flight, lot automatically rescheduled us to a new flight which was good but lost approximately 4 hours. Not a good way to start a vacation.

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

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

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

The crew and flight were amazing . However , my bag’s locker got broken and no refund provided . Everything else was amazing except this bad incident that ruined my experience

The seats are small and the movie selection was disappointing. However, the food was excellent and the cabin crew was attentive and kind.

Boeng Dreamliner has so tiny seats, so even medium and smaller size people have not enough room to fill comfortable..

All good! But sandwiches for breakfast need to be warm!!!!! Not cold!!! You do not want anything cold in your stomach in the morning!… think about it!

I always travel on Turkish Airlines but seriously I am I am considering to change because this is not the first time that the flight attendant are rude and they dont help. I asked for cold water with ice 5 times and I got water with no ice and this is not the first time to ask for something and you dont get it. Also I noticed this behavior only towards people who are not turkish.

Istanbul to Lahore flight was less than standard for international business class cabins. Seat did not were not flat and it did not operate easily. I had to push buttons hard repeatedly to operate the seat. I was in 5A seat

My, Syed Zawar Hussein Shirazi frequently flyer membership number was not included on my boarding pass from O’Hare to Istanbul despite my reminder to the attendant at check in. Further she forgot to give me my boarding pass form Istanbul to Lahore and she needs to improve her customer service, please 🙏

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.

During mid flight, try to get a flight attendant to help I couldn’t find one Otherwise, everything was perfect

The 2 agents on the check in counter were super nice , helpful and very polite. Boarding was like a 1 2 3, I would recommend Turkish airlines for your next trip.

7 stars hospitality and an excellent service by the Turkish Airline entire team. Somehow, our membership numbers for mileage points were not indicated on our boarding passes issued at O’Hare Airport by the Turkish Airlines check in desk. During transit in Istanbul, I brought to attention of customer service Turkish Airlines. Please have our mileage points posted to our membership account from O’Hare Chicago to Lahore for both my wife Kaukab Shirazi Thank you

Terrible boarding process, no proper line maintained even for business class, crews are not very attentive, business class food quality / variety / quantity have gone down, everything has become cheap.

Food quality and the overall service of the staff and significantly decreased. The flight was delayed at the Istanbul airport and the passengers were kept onboard for more than 3 hours. The staff didn’t kept the passengers informed and everyone was upset.

It was good flight was smooth, little cold on the plane but other wise good.

Great flight and crew. Need more legroom and DO NOT allow seats to recline.

The guy in front of me was talking constantly, even when the pilot was making announcements. I found this very disrespectful to the pilot and to others.

We left 1.5 hours late due to a “maintenance” issue. Very poor communication as to when we would board & depart. The crew in First Class was uncharacteristically not friendly). Delay into Brussels cost me my connection to Rome so lost the entire first day of vacation ( had a 10:30am flight to Rome - ended up on a 6:55pm flight).

Everything was OK except the meals, that was overpriced chicken meat.

Miss My connection I had to take a flight from Indianapolis to Denver , then to san fransisco , sleep in sans fransisco en the flight to Los Cabos the next morning

The TVs on the plane were all broken and inoperable. No snacks or food were served. Plane was very old and uncomfortable.

Takeoff delayed 2 hrs. Boarded on time to find we were missing part of the flight crew. Then informed that they had loaded too much fuel. Spent 1 1/2 hrs sitting there burning off the excess, which included a couple of laps around the runway until we were light enough to fly! Ridiculous!

I especially enjoyed having a lightly packed flight which enabled me and my wife to occupy a three seat area with nobody in the middle seat.

The seats are very small, that is all the staff did a good job.

The flight and staff were perfect. No notes. Amazing experience overall.

It was a safe and smooth flight. Members of the crew at the second level, business could have been more polite and engaging.

I was booked to travel from Dallas to Nairobi via Chicago and Brussels and had been issued boarding passes for all three segments of my journey. At the boarding gate in Dallas, I was required to check my carry-on luggage due to limited cabin space. Despite my attempts to explain that I was traveling internationally and would not have access to the bag during transit, my concerns were not considered. I also informed the staff that I did not have a padlock to secure the luggage, but this was disregarded. Consequently, I had to hastily transfer essential items from my carry-on into my handbag. Unfortunately, the onboard experience on the Chicago to Brussels flight further reinforced my dissatisfaction. The cabin crew appeared disengaged, indifferent, and lacking in attentiveness, resulting in a service experience that fell well below my expectations.

Flight was on time and got us to destination quicker than scheduled.

I have very bad experience with United because Vince two weeks that I did not receive my luggage yet

It was okay. Mothers with rowdy children should be invited to sit in front of them.

Good food, overall very comfy. The flight was full so obviously not optimal, but it is what it is.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

Entertainment is nonexistent. Food might have been good, however due to language barriers I didn’t get to have any food. Flat bed seats and layout was excellent. Crew efficient and straightforward, but lacking any western style approach. Not that I’d expect anything else, but one could have hoped.

Flight took very long to even get checked in for, everything was late and written out by hand. My luggage was lost for several days and it was the most unorganized flight experience of my life.

Delaying more than 5 hours from Belgrade to Tirana Information very rude to questions

They had lost my ticket and despite showing them the confirmation email with the itinerary and receipt of payment for the flight they could not put me on that flight and rescheduled departure postponing it by a whole week

Kraljevo is very convenient airport. It's brand new, small.and efficient. Great job!

Plane was old. Seats were hard and very close together. No in flight entertainment.

This was my connection flight that was moved time ahead for a almost entire day so I lost it and I had to purchase new ticket once I landed in Copenhagen since nobody wanted to take responsibility for moving flight in that way so it’s impossible to make it. Very poor job by Underpricer, Air Serbia and SAS.

Seats are very small and uncomfortable so such a long flight. My tray table was broken and taped up. Flight attendant untaped it to put my tray on. I taped it back up when done. The armrest between seats was broken and metal exposed. I will not book Air Serbia again.

Our flight was delayed from 1st July to 2nd July. But I wasnt informed! Checked my emails,every detail but I was definitely not informed! I and my family went to the airport on 1st July and learned that rhe flight is delayed to 2nd July at the airport! I am going to complain about this. I had to stay ın Kraljevo one more night. Luckily we could find a room. What ıf We couldn't?

It was not communicated in advance by the airline, but we needed a PCR test before boarding.

More options for your flight from Chicago to Bulgaria

Complete your trip to Bulgaria with a hotel stay or car rental