ORD - SOF

$319 Find Cheap Flights from Chicago O'Hare Airport to Sofia - 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 O'Hare Intl to Sofia departing on 8/17. 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
$767
Typical prices: $611-$822
Turkish Airlines
Fri 9/25Sun 10/4
ORD - SOF • 1 stop
Cheapest one-way
$319
Typical prices: $296-$475
Multiple Airlines
Mon 8/17
ORD - SOF • 3 stops
Top airlines
Cheapest • from $767 (round-trip)
Best reviews • 7.6 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between O'Hare Intl and Sofia. You'll need at least 1 connection.
Insights
Insights
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Insights
Top layover airports
Cheapest • Avg $764 (round-trip)
Shortest trip • 12h 24m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 5% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 28% price drop
Most popular
Good to know
Good to know
+1
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from O'Hare Intl to Sofia (ORD-SOF)

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

Fri, Sep 25 - Sun, Oct 4
Turkish Airlines Logo
11:25 am - 3:00 pm
ORD
-
SOF
19h 35m
1 stop
Turkish Airlines Logo
1:05 pm - 9:40 am
SOF
-
ORD
28h 35m
1 stop
$767Turkish Airlines
Thu, Sep 24 - Sun, Oct 4
Turkish Airlines Logo
8:10 pm - 8:45 am
ORD
-
SOF
28h 35m
1 stop
Turkish Airlines Logo
9:10 pm - 9:40 am
SOF
-
ORD
20h 30m
1 stop
$767Turkish Airlines
Sun, Sep 6 - Tue, Sep 22
LOT Logo
9:50 pm - 6:00 pm
ORD
-
SOF
12h 10m
1 stop
LOT Logo
6:45 pm - 7:50 pm
SOF
-
ORD
33h 05m
1 stop
$768LOT
Thu, Sep 3 - Thu, Sep 24
LOT Logo
9:50 pm - 1:55 pm
ORD
-
SOF
32h 05m
1 stop
LOT Logo
6:45 pm - 7:50 pm
SOF
-
ORD
33h 05m
1 stop
$768LOT
Fri, Jan 8 - Fri, Jan 22
Multiple Airlines Logo
7:05 am - 1:25 pm
ORD
-
SOF
22h 20m
2 stops
Multiple Airlines Logo
6:25 am - 2:52 pm
SOF
-
ORD
16h 27m
2 stops
$768Multiple Airlines
Thu, Oct 29 - Thu, Nov 12
Multiple Airlines Logo
1:55 pm - 1:25 pm
ORD
-
SOF
16h 30m
2 stops
Multiple Airlines Logo
6:25 am - 2:52 pm
SOF
-
ORD
16h 27m
2 stops
$768Multiple Airlines
Sat, Dec 5 - Fri, Dec 25
United Airlines Logo
6:00 pm - 1:15 pm
ORD
-
SOF
11h 15m
1 stop
United Airlines Logo
2:10 pm - 8:05 pm
SOF
-
ORD
13h 55m
1 stop
$773United Airlines
Wed, Jan 27 - Sun, Jan 31
United Airlines Logo
6:00 pm - 1:15 pm
ORD
-
SOF
11h 15m
1 stop
United Airlines Logo
6:25 am - 3:20 pm
SOF
-
ORD
16h 55m
1 stop
$773United Airlines
Sun, Jan 24 - Sun, Feb 7
British Airways Logo
1:31 pm - 4:20 pm
ORD
-
SOF
18h 49m
2 stops
British Airways Logo
7:45 pm - 4:49 pm
SOF
-
ORD
29h 04m
2 stops
$773British Airways
Fri, Jan 8 - Wed, Jan 13
British Airways Logo
8:59 pm - 6:35 pm
ORD
-
SOF
37h 36m
2 stops
British Airways Logo
9:05 pm - 1:45 pm
SOF
-
ORD
24h 40m
1 stop
$774British Airways
Booking Insights

KAYAK's insights & trends for O'Hare Intl to Sofia flights

Get data-powered insights and trends into flights from O'Hare Intl 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 O'Hare Intl Airport 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 O'Hare Intl Airport to Sofia departing in September.

Flight prices are typical for this route right now.

Flights to Sofia from Chicago O'Hare Intl Airport usually cost between $685 and $900 in September.
The lowest price found in the past 5 days was $767 on Turkish Airlines (Sep 24-Oct 4).

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport to Sofia is January, where tickets cost $561 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,147 and $1,090 respectively.

How far in advance should I book a flight from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport 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 O'Hare Intl Airport to Sofia, you should book around 2 weeks before departure, which saves you about 5% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low season

January

Cheapest flight

$319
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 46% increase in price.
Flight from Chicago O'Hare Airport to Sofia

When to book flights from O'Hare Intl to Sofia

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

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

    In the last 5 days, the lowest price for a flight from Chicago O'Hare Intl Airport to Sofia was $319 for a one-way ticket and $767 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in Chicago O'Hare Airport and on arrival in Sofia.

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

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

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

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

  • What is the most popular layover when flying to Sofia from Chicago O'Hare Airport?

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

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

    The two airlines most popular with KAYAK users for flights from Chicago to Sofia are KLM and LOT. With an average price for the route of $795 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 $966 and an overall rating of 7.6.

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Chicago O'Hare Airport 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 O'Hare Airport 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 O'Hare Airport with another airline. Booking your flights between Chicago O'Hare Airport and SOF 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 Chicago O'Hare Airport 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 O'Hare Airport 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 O'Hare Intl 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 O'Hare Intl 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.
7.6
LOTOverall score based on 1213 reviews
7.5Comfort
6.9Entertainment
7.6Boarding
8.2Crew
7.2Food
Airline reviews

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.

8.0 ExcellentAnonymous, Jun 2026
ORD - WAW
Read more LOT reviews

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.

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.

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 am very satisfied for choosing that Airlines! It was my first time but the everything went smoothly! Thank you!

This is truly the worst travel experience of my life. The UK ETA program had a technical failure, and I was stuck in limbo for 24 hours, unable to board my flight and unable to navigate anything in my itinerary. I had to rebook an entirely new flight and I’m now out doubled the money. Unconscionable.

OK, would prefer some meat for dinner, not just pasta although was tasty. There was only one dish, no choices

Flight delayed with no explanation. Boarding was confused (proceed to plane, go back to waiting area).

It was a great experience. The aircraft is a bit dated but other than that it was great.

Last few years I didn't not have great experience with United Airlines.

We have travelled on 13 December with Austrian Airlines from Yangon through Bangkok and Vienna to Varna. The first flight operated by Thai Airlines was nice and comfortable. I wouldn’t say the same thing about the next two flights which were operated directly by the Austrian Airlines. During our flight from Bangkok to Vienna:  > The service was very poor – serving of food and drinks was disorganized, late and not combined, the stewards were walking back and forth without doing anything substantial for the passengers. Even the morning breakfast was very late with a cup of coffee almost while landing (after a reminding).  > The food itself was OK-ish but for a 12-hour flight, there were no snacks/bites in between dinner and breakfast as it is with the other airlines.  > The cutlery was wooden, most probably recycling, but very unpleasant to eat with.  > The stewards were not rude but not friendly and/or helpful  > And also, half of the passengers had travel sets, others did not. The flight from Vienna to Varna was another surprise: firstly, the flight was late and secondly, they were serving only water free, even the coffee was paid, so were the snacks, but we had to pay to reserve seats. The whole experience is as if it was a low-cost airline. All in all, I wouldn’t recommend using the services of Austrian Airlines: the ticket prizes are quite the same as of the other carriers flying to this destination and you would have much pleasant time.

No delays, helpful staff, well organised. The check in and boarding procedures ran smoothly. The only thing that put me off is that the meal had spicy peppers in. I would have appreciated at least a warning (if i couldn't have a choice) so as to simply not eat them because they were too spicy.

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

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.

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.

Turkish Airlines apparently no longer gives you 2 checked bags allowance on international flights, so that pleasure cost me $165 for my second suitcase at the airport. On top of that, they damaged that very suitcase, which happens to be a designer one and part of a set - ripped one of the four wheels right off.

It was hot and not as comfortable as the flight to Chicago. Must have been a different plane that needs to be worked on or replaced.

The SFO lounge closes at 12 midnight. My flight took off at 2AM

It was extremely hot in the cabin the entire flight, vent air was worn

Have not had a flight out or returning to Norfolk that has not required maintenance, and a gate delay. Properly staff the crew so maintenance can be performed without last minute emergencies on each flight and there is enough staff to have gates prepared for inbound flights. Staff to ensure the safety and on time service vs. profit.

We were forced to eat vegetarian food because non veg food ran out. The breakfast was mediocre.

My original flight was cancelled and that affected my trip and my plans and I got no compensation and customer service was hard to reach as well

The kid in the middle seat kicked me almost the whole flight, almost kicked my hot tea off my tray. The flight was delayed due to the first plane not being able to be de-iced in July! We had to get a new plane. Now I drive 3 hours back to Edmonton because direct flights from PVR were way to expensive

The flight was delayed by a hour and I wish they had communicated it sooner. No issues on the plane, it did take a while for food to come.

Ridiculous boarding. Enter the gate, walk down a staircase with bags, exit a building, get on a crowded bus, dropped off a few meters away from the aircraft, walk with bags to another set of stairs to board the aircraft. And all that during a pouring down rain, and with children. Ridiculous!!!

Lufthansa no longer offers any refreshments and snacks on short i.e., around 2 hrs flight. We still had full staff stewards/stewardesses. No idea why they were needed as there was no work for them during the flight

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.

The agent, who took my mother to her gate, kept talking with one of her male coworkers and treating my mother like a sack of potatoes. She was ignoring my questions because she was too busy flirting with her male colleague. This was a very unprofessional behavior. We also had to wait for close to half an hour for an agent to arrive.

Very good flight, only problem is the boarding process where some peoples do not have manners and do not how to fly ( preparing your documents, oversized carry-ons, not understanding or feigning to not understand directives).

I really like it and travel to Europe and back with Lufthansa, but it is getting expensive, a bit beyond my me

Not available crew to load the luggage for all the passengers,comon situation for local European destinations , not acceptable situation, never Lufthansa again 😉 🙄

Flight was overbooked. Crew did a great job but passengers weren’t nice and really not patient. Flying in these times is not the best idea tbh.

Everything you need to know for your flight from O'Hare Intl to Sofia

Information on your arrival and departure airports