ORD - SOF

$246 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 10/4. 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

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.
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Booking Insights
Flights 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

Mon, Aug 18 - Mon, Sep 8
Turkish Airlines Logo
7:50 pm - 8:25 pmORD-SOF
16h 35m1 stop
Turkish Airlines Logo
3:35 pm - 10:00 pmSOF-ORD
14h 25m1 stop
$483Turkish Airlines
Find Deal
Mon, Sep 15 - Mon, Oct 6
Austrian Airlines Logo
4:20 pm - 6:10 pmORD-SOF
17h 50m1 stop
Austrian Airlines Logo
6:55 pm - 1:20 pmSOF-ORD
26h 25m1 stop
$489Austrian Airlines
Find Deal
Sun, Sep 21 - Fri, Oct 17
Lufthansa Logo
3:35 pm - 12:00 pmORD-SOF
12h 25m1 stop
Lufthansa Logo
6:15 am - 12:55 pmSOF-ORD
14h 40m1 stop
$502Lufthansa
Find Deal
Sun, Aug 31 - Tue, Sep 16
SWISS Logo
7:05 pm - 2:45 pmORD-SOF
11h 40m1 stop
SWISS Logo
1:15 pm - 3:55 pmSOF-ORD
34h 40m1 stop
$511SWISS
Find Deal
Mon, Sep 15 - Mon, Oct 6
SWISS Logo
7:05 pm - 10:05 amORD-SOF
31h 00m1 stop
SWISS Logo
3:30 pm - 3:55 pmSOF-ORD
32h 25m1 stop
$516SWISS
Find Deal
Mon, Sep 29 - Tue, Oct 7
Lufthansa Logo
3:35 pm - 12:00 pmORD-SOF
12h 25m1 stop
Lufthansa Logo
6:00 am - 12:30 pmSOF-ORD
14h 30m1 stop
$517Lufthansa
Find Deal
Mon, Sep 15 - Mon, Oct 6
British Airways Logo
9:37 pm - 8:40 pmORD-SOF
39h 03m2 stops
British Airways Logo
8:00 pm - 11:50 amSOF-ORD
23h 50m1 stop
$518British Airways
Find Deal
Mon, Sep 15 - Mon, Oct 6
British Airways Logo
9:37 pm - 8:40 pmORD-SOF
39h 03m2 stops
British Airways Logo
8:00 pm - 4:13 pmSOF-ORD
28h 13m2 stops
$523British Airways
Find Deal
Tue, Sep 30 - Tue, Oct 14
United Airlines Logo
4:20 pm - 11:40 amORD-SOF
11h 20m1 stop
United Airlines Logo
6:00 am - 5:33 pmSOF-ORD
19h 33m2 stops
$534United Airlines
Find Deal
Mon, Sep 22 - Mon, Sep 29
United Airlines Logo
3:35 pm - 12:00 pmORD-SOF
12h 25m1 stop
United Airlines Logo
12:00 pm - 2:55 pmSOF-ORD
34h 55m2 stops
$549United Airlines
Find Deal
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.

What’s the cheapest day of the week to fly from Chicago O'Hare Airport to Sofia?

The average price of all round-trip flights from Chicago O'Hare Intl Airport to Sofia clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Sofia on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Chicago O'Hare Airport to Sofia. For your return ticket, we recommend flying on a Wednesday and avoiding Mondays for the best deals.

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 November, where tickets cost $578 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,166 and $1,054 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$246
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly with an average 19% 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 $246 for a one-way ticket and $483 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?

    Star Alliance, and oneworld are the airline alliances operating flights between Chicago O'Hare Airport and Sofia, with Star Alliance 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, Austrian Airlines or SWISS?

    The two airlines most popular with KAYAK users for flights from Chicago to Sofia are Austrian Airlines and SWISS. With an average price for the route of $877 and an overall rating of 7.6, Austrian Airlines is the most popular choice. SWISS is also a great choice for the route, with an average price of $847 and an overall rating of 7.5.

  • 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 1106 reviews
7.5Comfort
8.2Crew
7.6Boarding
7.0Entertainment
7.2Food
Airline reviews

Boarding could've been improved a bit, the rest is excellent.

10.0 ExcellentVladislav, Aug 2025RMO - WAW
Read more LOT reviews

Boarding could've been improved a bit, the rest is excellent.

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

Checking in took very long for whatever reason. Flight comfort these days is always poor so… Crew was great thought!

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

Bags lost no more to say, bad communication and no urgency to get it back to the hotel by the airline properly the worst airline I have used.

The customer service rep on chat refused carrying golf set at no charge that is customary for LOT and others. I wanted yo carry just ONE club not even full set! Web check in was nightmare. Most horrible lounge at warsaw. To call it business class is a BIG exaggeration. Rude staff warsaw to nyc. Seats uncomfortable and not flat as is now customary. Bad content and entertainment system.

It was was okay but the seat was stiff and hard to sit on it!!

Seats were so uncomfortable, my butt hurts so much, I wish they have more cushions,it really was horrible, Except that, Stewarts were polite food was decent

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.

Everything was good, flight was smooth and on time Like service

Austrian Airlines help and service was fine, but Kayak misled us into believing we had purchased a Business Class ticket. In fact, the tickets were only upgraded Coach Class tickets with luggage restrictions that belonged to the Coach Class. Very disappointed! Paid over $$$$ 9K for the two tickets. Very disappointing!

Quick and organized boarding process, friendly staff but not as many snacks and drinks as the previous flight overnight

Landing was a little hard. Food was not great My prior review was for the flight to nyc too

Landing was a little hard. Food was not great. No options.

Five star experience all around except for my seat, which was broken. It would only go down 70%.Of the way. It defeats the purpose of buying a business class ticket if you don’t actually get to lay flat..

I love this airline.God bless CAO and the whole staff of this company

Great staff, efficient and knowledgeable. Very helpful with others and considerate towards those with children

WiFi would have been nice and some more powerful usb ports, available ports could not keep my phone’s charge much less charge the phone.

Not so good. I paid for a preference economic seat, and I couldn’t incline it back because it was blocked. They explained me that because is the last before emergency exit. The company new that but it was not explained in the seat selection

It was on time. Snacks could have been provided for free.

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!!!

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

It was great, I’m very grateful for the pilots and crew flight attendants for everything.

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

The boarding of took of late.The presentation of the food was horrable as was the tast of the food was cold and tastless.

Delay and keep changing gates. I have to run around from B to C then to E.

I was charged for my daughters bag when I am supposed to receive two free checked bags with my United Explorer card.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

Flight was great. Efficient boarding. Short flight. Early arrival. Friendly flight crew. The entertainment system did not work well. Could not access it until the aircraft reached 10K feet or more. Lots of glitches.

A bit rush for transit. Food and entertainment are not available

Bough tickets with luggage, but made me pay at Airport as well

The economy seat was so uncomfortable, had not enough leg room for 13 hours flight, front seat basket was broken and couldn’t hold anything, food quality was horrible( we got food poisoned ) we charged for logged which used to be free. We paid too much for this flight and very disappointed. Turkish air line better to make satisfy and respect people instead of find different way to scam people.

This is really the rating of two flights. JFK to IST then IST to NQZ. New York to Istanbul was good. Good crew and all positives. The flight to Astana was so bad that brought it all down. Crew was nonexistent above the minimum, seats were cramped, and it was hot on the plane. Turkish Airlines seems to be slipping down to US based carriers level.

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.

Everything was very good, except that the plane was an hour and a half late

flight with heavy turbulence old boeing 777 rest wasnt clean dashboard doesn’t work

Light and recline did not work on my seat. Very uncomfortable and could not read in the dark

Bad experience; they are not good anymore. They charge too much for luggage seat are so uncomfortable, Flight delays which may miss your next flight, they don’t care if you miss the flight or not. Zero customer services for front desk representatives Istanbul's airport I’m not using this airline any more.

I’ve been traveling for 20 years. I tried Turkish airline for the first time horrible horrible service and it would be my last time even if I get offer for a free ticket, I will not accept it. They have races and the worst Flight attendant

It wasn't good. I didn’t understand. They changed 320 dollars for 2 luggage. My ticket was regular and I paid almost 1200.00 dollars. Why they did charge? I want my money back.. thanks Yılmaz polat

Our flight was delayed for over an hour due to weather, and it had already been a long travel day. However, the crew was calm and compassionate, listening to every complaint with genuine concern. They got us home safely without incident, in spite of all of the obstacles. I’m grateful.

Hate their old flights, boatding, food and services. Very poor quality

Insulting. Lufthansa flight from Munich to EWR had us getting our luggage when we were told in Florence that it would follow us to Indianapolis. It did not. Then very slow security in EWR caused me and three other passengers from Lufthansa flight from Munich to miss the boarding closure. Behind me were two elderly grandparents and their ten year old grandson. We were all refused entry on a plane to Indy that was still at the gate. The doors had not even closed inside the terminal yet. No apologies or compensation offered. Not even a meal voucher let alone a free hotel stay for our inconvenience. I m not sure what the other three passengers behind me did ( they were elderly with a grandson, recall), but I stated 12 hours overnight in a chilly EWR airport until next flight to Indy at 850 next morning.

The food could be better, more snacks. And have some plugs to chargue the phone.

The pasta in the evening meal was tasteless. Otherwise, the flight was okay.

Everything was really great just The aircraft was too old and sounded it will break during takeoff

Seating was average for a first class seat. It very modern. I expected better.

Flight was a little late. The crew was courteous, food ok

Bad! Disaster!! The LH419 was cancelled after 4 hrs on board with no AC and no toilets

Poor food on flight between Toronto and Stockholm Airport Toronto too crowded

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.