ORD - SOF

$330 Find Cheap Flights from Chicago O'Hare Airport 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 O'Hare Intl to Sofia departing on 8/19. 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
$692
Typical prices: $758-$578
Turkish Airlines
Fri 10/2Thu 10/29
ORD - SOF • 1 stop
Cheapest one-way
$330
Typical prices: $296-$470
British Airways
Wed 8/19
ORD - SOF • 2 stops
Top airlines
Cheapest • from $692 (round-trip)
Best reviews • 7.6 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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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 $667 (round-trip)
Shortest trip • 12h 02m (one-way)
Insights
Insights
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Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 9% compared to booking last minute.
Insights
Insights
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Insights
When to travel
Cheapest • 22% price drop
Most popular
Good to know
Good to know
+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, Oct 2 - Thu, Oct 29
Turkish Airlines Logo
11:25 am - 8:45 am
ORD
-
SOF
13h 20m
1 stop
Turkish Airlines Logo
9:40 pm - 11:05 am
SOF
-
ORD
20h 25m
1 stop
$692Turkish Airlines
Mon, Sep 7 - Sat, Oct 3
Turkish Airlines Logo
11:25 am - 3:00 pm
ORD
-
SOF
19h 35m
1 stop
Turkish Airlines Logo
3:50 pm - 9:40 am
SOF
-
ORD
25h 50m
1 stop
$694Turkish Airlines
Sat, Aug 22 - Sat, Sep 5
Air Serbia Logo
11:20 pm - 3:30 pm
ORD
-
SOF
32h 10m
1 stop
Air Serbia Logo
5:00 am - 9:15 pm
SOF
-
ORD
24h 15m
1 stop
$696Air Serbia
Tue, Sep 1 - Sat, Oct 24
Turkish Airlines Logo
8:10 pm - 3:00 pm
ORD
-
SOF
34h 50m
1 stop
Turkish Airlines Logo
3:50 pm - 7:25 pm
SOF
-
ORD
35h 35m
1 stop
$698Turkish Airlines
Sat, Aug 1 - Tue, Sep 8
Turkish Airlines Logo
8:10 pm - 3:00 pm
ORD
-
SOF
34h 50m
1 stop
Turkish Airlines Logo
3:50 pm - 9:40 am
SOF
-
ORD
25h 50m
1 stop
$717Turkish Airlines
Thu, Aug 27 - Thu, Sep 10
Turkish Airlines Logo
8:10 pm - 3:00 pm
ORD
-
SOF
34h 50m
1 stop
Turkish Airlines Logo
3:50 pm - 9:40 am
SOF
-
ORD
25h 50m
1 stop
$722Turkish Airlines
Mon, Aug 31 - Sun, Sep 6
Air Serbia Logo
4:40 pm - 3:30 pm
ORD
-
SOF
14h 50m
1 stop
Air Serbia Logo
4:00 pm - 2:30 pm
SOF
-
ORD
30h 30m
1 stop
$724Air Serbia
Sat, Aug 29 - Sat, Sep 12
Air Serbia Logo
11:20 pm - 3:30 pm
ORD
-
SOF
32h 10m
1 stop
Air Serbia Logo
4:00 pm - 9:15 pm
SOF
-
ORD
13h 15m
1 stop
$725Air Serbia
Wed, Aug 19 - Sun, Aug 30
Air Serbia Logo
4:40 pm - 3:00 am
ORD
-
SOF
26h 20m
1 stop
Air Serbia Logo
4:00 pm - 2:30 pm
SOF
-
ORD
30h 30m
1 stop
$726Air Serbia
Fri, Aug 14 - Sat, Sep 12
Turkish Airlines Logo
8:10 pm - 8:15 pm
ORD
-
SOF
16h 05m
1 stop
Turkish Airlines Logo
9:05 pm - 9:40 am
SOF
-
ORD
20h 35m
1 stop
$731Turkish Airlines
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 October.

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 February, where tickets cost $586 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,113 and $973 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 9% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$330
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 48% 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 3 days, the lowest price for a flight from Chicago O'Hare Intl Airport to Sofia was $330 for a one-way ticket and $692 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 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 $654 and an overall rating of 7.8, KLM is the most popular choice. Austrian Airlines is also a great choice for the route, with an average price of $850 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
Austrian AirlinesOverall score based on 913 reviews
6.8Food
7.3Comfort
7.6Boarding
8.1Crew
6.8Entertainment
Airline reviews

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

2.0 MediocreAnonymous, Apr 2026
IAD - PHX
Read more Austrian Airlines reviews

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

Booked economy. Seat felt like it was a bit more roomy than my last trans Atlantic flights. I had a nice person sitting next to me. Everything was as good as it could be considering you are 35,000 feet up in the air and in a metal container. Beers, wine, food were all readily available. Plenty of movies and shows to watch. Friendly flight staff

Short flight. Bare bones and kinda seeming like an older plane. But got me there on time and that's what counts. Perfectly fine flight all the way from start to finish.

We were delayed three hours from Montenegro to Vienna on our outbound flight and then rebooked an extra leg on our trip to the US. Our bags, which Austrian made us check in in Montenegro even though the flight was barely half full, didn't find us for ten days. Then, when we asked for compensation for the delay we were given the runaround that the flight originated outside of the EU. Next time we fly Turkish Air.

My Austrian Air flight from Montenegro to Vienna was delayed by three hours because their plane de-icer was broken and they had to wait for the sun to come up before the ice could melt. This meant we missed our United flight altogether. So I can't speak about United, but I was not impressed by Austrian Air. They made us check in two carry on bags for a 60% full flight, and the bags didn't find us in the US for ten days. The re-routing they arranged included an extra leg, a midnight taxi ride across New Jersey and New York, and a five hour sleep in a hotel. Not impressed.

Excellent flight. The crew was exceptionally attentive and organized. Attention to details is unmatched.

Loved the courtesy and punctuality. Very professional and most importantly on time.

Great! They got my vegetarian meal right, flight was comfortable, they helped store my heavy luggage. Pleasant crew and flight staff.

I did wish they would give us the entire little bottle Bailey's instead of just have 1/2 bottle at a time

My layover in Vienna was supposed to be 35 minutes but because my flight was canceled I had to wait in the airport for an additional 8 hours.

Flying business class saves you. Once you get out of the terminal and onto the plane, it’s fine. The traffic at the gate is a horror. No organization at all. The fact that Business class is promised early boarding is a myth.

Good in general, but i think the chair is not comfortable for traveling more than 2 hours ..

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.

Flight was delayed for a hour from Warsaw, not sure why. When we landed in Chicago, plane was still on the runway for about half a hour. Took a while to get off.

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

The ground crew members at check in counter were courteous. The boarding was seamless. Flight departed as scheduled. Service on board was great

Very comfortable in business class. Excellent service. Good food. Smooth trip.

The seats seems abit small and the reclining is too much, the seat in front of me came back too much and made it uncomfortable for me.

As a first time flyer with Turkish Airlines. My experience was very good due to the factor that there were to many passengers on the my first flight compared to my connecting flight. However, I know that nothing is perfect and all companies are trying to accommodate their passengers to the best way possible. I will always say, a FEW INCHES will go LONG WAY. That's something all airliners should consider, and not only the money aspect!!! A long time commitment is better than one time service! Thank you

Flight was delayed. While standing at the gate, a note appeared on the sign saying the gate had changed to a gate far away. No member of the Turkish airlines team got on the microphone to instruct passengers to go to the other gate, to ignore the chiron, etc. Finally, the message disappeared. Eventually, the flight began to board. Very slowly. More slowly than I experience with other airlines. Though Istanbul may just be slow . . . In all other ways, great flight, great entertainment (top notch movies), great service, excellent food, comfortable lie-flat seat, dimmed lights, etc.

Staff at the airport wasn't helpful or friendly. Probably the worst airport experience I have ever had, going and coming. The staff on the plane was better. Still not super friendly or personable. However, they were not rude like airport staff. They ran out of certain menu items. Maybe could have been prepared better? Overall just ok.

It was a pleasant experience. In flight entertainment could have been better

The desk crew at the LAX crew could do better. A girl named Mahesi was very abrasive and unfriendly. She needs a better customer service uproar.

It was peaceful excited We enjoyed it always Turkish peaceful excited

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

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

Several missed and almost missed connections. It felt like everything was being patched together last minute without enough resources and it ended up being an extremely stressful experience that basically ruined our weekend on the west coast. What a waste.

Crew was friendly. Seats are too narrow, particularly when a big person is in the adjacent seat, but I understand this is due to smaller planes usually flight into Lincoln. I have experienced several flight delays going out and coming into Lincoln airport, I say maybe 50% or higher of the flights I've taken out of this airport have been delayed.

Great flight. Boarded efficiently. Arrived early at CLT. There was no in flight entertainment on this aircraft. Great crew.

The seat was comfortable. There was a lot of turbulence. If it weren't for that,it would have been okay.

Poor communication, flight was delayed for preventable reasons. I missed my connection.

The boarding timing needs to be improved. The flight was delayed again because it took way too long to board. I was already exhausted from sleeping at the airport and spending all day there due to delay from my previous flight that connected in Chicago.

Great until we got to FRA. The next trip leg we were put in Business Class where seats had minimal padding!!!! They were awful and United Airlines needs to have their Lufthansa partner up their game or I won’t fly with them again!!

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 upgraded to the business class cabin. It was the poorest business class I have ever experienced. No access to any business lounge in Tampa airport. Seats are not comfortable. I had a window seat and had to step/crawl over the next seat. Food was mediocre and service below average for business class. Bathroom location was ridiculous. No place to wait. I cannot believe I paid this kind of money and will never fly Lufthansa Discover again. They really should reimburse me somehow.

Boarding was disorganized. The door to one to the toilets wouldn’t lock. The plane was shockingly cramped, and clearly used for domestic flights due to the menus for items to sell domestic travelers. United should be ashamed of its small seats, tiny unclean toilets, and money grubbing stance toward services, compared to Lufthansa, Emirates, and most international carriers United is awful.

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

Terrible. Lost our luggage for 4 days. Did not advise passengers there was a strike in Barcelona Airport and had zero personnel on hand at airport to advise passengers on where to go to file claims. We had to fend for ourselves. No assistance at all other than an online claims submission process that we had to find out about on our own.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Everything could have been better. What needed to be wrong with United went wrong

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

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.

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

Information on your arrival and departure airports