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Find cheap flights from Chicago to Bulgaria from $463

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 Bulgaria departing on 5/18. 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
0 bags
Sat 6/8
Sat 6/15

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Best Bulgaria Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Sofia
Sofia1 stop$579

Good to know

Low season

January

High season

July

Cheapest flight

$463
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 36% increase in price.
Flight from Chicago O'Hare Airport to Sofia

FAQs - booking Bulgaria flights

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

    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 Bulgaria.

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

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

    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 Bulgaria 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 Bulgaria?

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

See more FAQs

Top tips for finding cheap flights to Bulgaria

  • Morning departure is around 40% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

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.
7.6
Austrian AirlinesOverall score based on 1062 reviews
7.6Boarding
8.1Crew
7.4Comfort
6.9Entertainment
6.9Food
Airline reviews

The crew was attentive but not intrusive, and was always kind in every interaction.

10.0 ExcellentCraig, Apr 2024ORD - VIE
Read more about Austrian Airlines reviews

The crew was attentive but not intrusive, and was always kind in every interaction.

Austrian was not the issue. Kayak was terrible The flight was canceled. Frustrating but it can happen. The worst was Kayak's customer support around re-booking. I have chatted with a bot, than with a person who insisted the flight was still on as originally booked. while chatting i went on Austrian web page and told the kayak chat lady that the flight is shown as cancelled. She said she will escalate this and that someone will contact me within the hour. When I have asked her to give me the details of the flight she sees, She gave me the general A to B and return B to A. Totally unhelpful. After two hours I contacted them again, They were still saying the original flight is as scheduled and when I explained again I was told I will be contacted within 2-6 hours. NO ONE CONTACTED ME EVER SINCE! I have than contacted Austrian directly and was rebooked on a difficult flight. Kayak continued to send me irrelevant updates about my original flight. Terrible customer service at time of need.

Management and staff att viena wasn’t professional,and they are not good by how to communicate and solve the problem, I was shocked , as I know Austrian airlines was amusing Thank you

The baggage arrived damaged and i spent EUR 300 on the baggage a month ago. No responsibility from airline or the handles.

Tight connection from Austrian Airlines made this challenging. Our luggage did not make it, delivered the next day at noon. Flight itself was very full, not especially comfortable.

The flight was late. We accommodated other missed flights, and the plane was full of people, without space to store carry-on luggage. They lost our checked luggage for the entire flight and delivered it after two days.

Premium Economy is good value in comparison to Business Class. Not all the perks of Business but a lot of leg room and wider seat and elbow room. Food was very good. I even asked for a Gruner Veltliner wine which was not on the trolley and the attendant went into Business/First to get me a glass. Nice little touch. I would like to have a wider selection of music -- more 70's-80's (guess how old I am).

There were a number of passengers scheduled to transfer to the flight from Vienna to Warsaw. None of them made it because the crew failed to assist them in getting to the gate for the Warsaw bound flight in time. It could have been done very easily with proper assistance.

The restrictions regarding carry-on baggage is too strict. My wife was forced to check her carry-on bag. Never had this on other airlines.

Very efficient and profesional .One of the best. I had 20 minutes between 2 flights and still made it amazing.

Excellent service and comfort from the moment you check in. Flight crew is hyper focused on making passengers comfortable and at ease. It’s like a flying hotel!

Only chicken as a meat dish through out the flight

Nothing really was great as such. Seen other no name airlines perform better.

Quality of service on board was very inconsistent. FA service primarily seemed robotic and they barely engaged with passengers

I’m unclear why I had to pay extra for assigned seats as Turkish airlines did not honor the seating. We were placed across the aisle from each other on TK 34, and were seated behind one another on TK 694. Because my name was misspelled on e-ticket (Klawiter, instead of Klawitter) I could not log onto website to get the connection gate number in Istanbul. The monitors in the airport were a jumbled mess 1/2 Arabic and 1/2 English.

On line check in needs a lot of improvement. I tried and gave up.

Food not good, flight attendants not the best, not accommodating very ruff

the female flight attendant was racist towards me. I could tell she treated the two other passengers next to me with more softness.

Oh my god! For an13 hour flight they serve you food just one time. Also don’t be thirsty they give you a little small cup of soda to drink. They seem like their goal is to feed you one so they don’t have to be bothered with you. It quite surprise for such a long flight there are several times to eat at least three and the food was well lackluster. The food and lack of offering drinks which were always hot no ice provided.

We were traveling first class. Checkin counter lady and her manager, both were in bad mood and did not treat us well about checking in the handbag. The gate agent took care of it right away. I travel Turkish twice a year in first class. No one has ever refused to check in the hand bag. Not sure, why this agent and her manager refused. Everything else was excellent.

I’ve had a couple flights this week on United that were delayed by an hour or more

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

Nothing beats ANA customer service on my opinion. Maybe because of their Japanese culture (and food). Arigatō

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

Flight delayed for 2 hours due to a part. The plane sat waiting for boarding for a long time and during final preflight inspection the issue was found. Why not do the preflight inspection sooner if you know the plane is being used?

The flight experience was very good! Especially the United Club!

I was not able to buy food in the flight. They refer to include your Credit card in the APP, and if you are not from USA (i have a credit card form Canada) it is not possible

Aircraft has better leg room than any of United's larger planes. We had requested mobility assistance for this and related flights. United's response to all was superb.

The flight from Ottawa to Chicago took a lot longer due to DC in Ottawa. We got to Chicago and went to our gate to catch our flight. We only had nine minutes I found that very stressful.

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!

LOT airlines wasn't the best. They had trouble with boarding and they didn't have my information on file the right way. They change last minute details without us knowing and everything was a HOT MESS. Lot airlines also lost my baggae which was the carseat and haven't responded to any of my emails.

Would have liked to have Wi-Fi on the longer flight (nyc-Warsaw)

My flight was cancelled and I went through hell to get it fixed, with no help from the website I booked it on. My reservation was cancelled AGAIN by the site I booked on without my knowledge a week later. The flight itself that I finally got on was awful. Drunk man belligerent the entire flight, I don't understand how he was allowed on the flight.

Lot still has not refunded me after they cancelled my flight to India!! Kayak had been awful at getting me this refund too. Will NEVER be using kayak or LOT again.

Tv screen not working. Food in business class was cold & not available

The customer service and the flight experience were very good!

My bag was lost despite an almost 8 hour layover in Warsaw. Nearly 12 hours after my arrival, I have not heard anything about it.

The plane was very comfortable, the seats were great for overnight flight. The bathrooms were spotless the entire flight

Pros: "Nothing to like"
Cons: "This Iwa’s very bad experience. Never again will use LOT"

Everything could be better. The plain was in Orlando for 3 hours prior to boarding. After boarding all the passengers they found out that plane has a mechanical problem. After an hour the problem was solved, the pilot comes on and states, (We have to go back to the gate and take on more fuel!) Are you kidding me???? Who they have for pilots, Boy scouts?? I barely made my connecting flight to Vienna, but my suitcase did not. I'm still waiting for it, in Gyor, Hungary. Am I having fun yet?? Other passenger were in the same binned. I travelled all over the world both for business and pleasure with all types of airlines. By far of all the carriers I travelled with, Discover is the worst. I'm contemplating to bight the bullet and go back to the US with a different carrier. For International flights, the seats are made for little people. The person in front of me had his seat reclined the whole way, I felt like he was sitting in my lap. For closing, I would not let my dog travel with Discover, yet alone recommend it to an other person. Does it sound like I'm frustrated, Think about having to travel back to the US with them. I'm sure I'll not hear back from you, because nobody wants to hear about bad news, but with all the hype Discover puts out there about their services, nothing could be further from the truth. Joseph A. Nagy

Only problem we experienced was not anything to do with Lufthansa. When changing planes in Frankfurt we spent over an hour on passport control line. Lufthansa did a marvelous job on everything from keeping me informed via texts, to terrific cabin crew.

Bordón could be bettet if the company say before boarding the order of the different groups.

Checked in is easy and it was a smooth flight from LAX to Munich

There is no recline on flight from DFW to FRA. Middle eastern airways provide better recline option for the same class. FRA to Bangalore has better recline option. I bid 100$ for premium economy, my request was declined. But staff handled it without issues.

The Lufthansa part was wonderful. The short connection flight was not.

German crew were very kind. Food was okay but can be better, especially bread was not good, Garbage collection was very poor.

Awful Terrible staff poor communication Flight delayed for an hour with no apology or explanation and no help re missing connecting flight. Resulted in a 7 hour layover at Munich waiting for another connecting flight. Only 15 euros refreshment voucher given. Will not fly Lufthansa again

Both flights were late for what appeared to be the airline’s not having the planes ready. Arrived over 6 hours late.

It was a busy flight and all the crew were very helpful and gracious

Book cheap flights from Chicago to Bulgaria

Recent round-trip flight deals

11/4Mon
1 stopBritish Airways
26h 05mORD-SOF
11/18Mon
1 stopBritish Airways
27h 25mSOF-ORD
$579
11/4Mon
2 stopsAmerican Airlines
20h 05mORD-SOF
11/18Mon
1 stopAmerican Airlines
27h 25mSOF-ORD
$583
9/9Mon
1 stopTurkish Airlines
13h 05mORD-SOF
10/1Tue
1 stopTurkish Airlines
20h 30mSOF-ORD
$594
10/1Tue
1 stopTurkish Airlines
28h 00mORD-SOF
10/15Tue
1 stopTurkish Airlines
32h 20mSOF-ORD
$595
9/1Sun
1 stopLOT
12h 15mORD-SOF
9/28Sat
1 stopLOT
28h 30mSOF-ORD
$710
10/19Sat
1 stopLufthansa
12h 35mORD-SOF
10/26Sat
1 stopLufthansa
14h 15mSOF-ORD
$720
7/30Tue
1 stopLufthansa
12h 35mORD-SOF
9/18Wed
1 stopLufthansa
14h 30mSOF-ORD
$722
10/5Sat
2 stopsUnited Airlines
24h 55mORD-SOF
10/12Sat
2 stopsUnited Airlines
24h 05mSOF-ORD
$730
7/28Sun
1 stopUnited Airlines
19h 10mORD-SOF
10/9Wed
2 stopsUnited Airlines
17h 27mSOF-ORD
$732
8/1Thu
2 stopsLOT
16h 45mORD-SOF
9/28Sat
1 stopLOT
28h 30mSOF-ORD
$740

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Recent one-way flight deals

5/18Sat
2 stops
43h 43mORD-SOF
$463
5/18Sat
2 stops
41h 42mMDW-SOF
$463
7/29Mon
2 stops
41h 40mORD-SOF
$464
7/29Mon
3 stops
31h 40mORD-SOF
$474
7/29Mon
1 stopTurkish Airlines
15h 50mORD-SOF
$562
5/18Sat
1 stopLOT
12h 15mORD-SOF
$604
7/18Thu
2 stopsLOT
36h 45mORD-SOF
$613
5/12Sun
2 stopsUnited Airlines
27h 16mORD-SOF
$660
5/12Sun
2 stopsLufthansa
17h 10mORD-SOF
$673
6/10Mon
2 stopsUnited Airlines
23h 15mORD-SOF
$810

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Last minute flights from Chicago to Bulgaria

Last minute flight, train and bus deals

5/10Fri
multi-stopITA Airways
18h 10mORD-SOF
5/13Mon
multi-stopITA Airways
32h 15mSOF-ORD
$669
5/10Fri
multi-stopITA Airways
18h 10mORD-SOF
5/18Sat
multi-stopITA Airways
27h 10mSOF-ORD
$689
5/10Fri
multi-stopLufthansa
16h 05mORD-SOF
5/21Tue
multi-stopLufthansa
14h 15mSOF-ORD
$736
5/10Fri
multi-stopUnited Airlines
19h 50mORD-SOF
5/21Tue
multi-stopUnited Airlines
14h 15mSOF-ORD
$741
5/10Fri
multi-stopUnited Airlines
16h 05mORD-SOF
5/21Tue
multi-stopUnited Airlines
33h 54mSOF-ORD
$747
5/10Fri
multi-stopLufthansa
16h 30mORD-SOF
5/19Sun
multi-stopLufthansa
30h 10mSOF-ORD
$792
5/13Mon
multi-stopLOT
32h 15mORD-SOF
6/20Thu
multi-stopLOT
13h 00mSOF-ORD
$1,189
5/13Mon
multi-stopLOT
32h 15mORD-SOF
6/20Thu
multi-stopLOT
28h 30mSOF-ORD
$1,203
5/13Mon
multi-stopAustrian Airlines
11h 20mORD-SOF
7/13Sat
multi-stopAustrian Airlines
34h 50mSOF-ORD
$1,402
5/14Tue
multi-stopAustrian Airlines
14h 17mORD-SOF
7/14Sun
multi-stopAustrian Airlines
28h 45mSOF-ORD
$1,443

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