SOF - ORD

$369 Find Cheap Flights from Sofia to Chicago O'Hare Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sofia to O'Hare Intl departing on 2/19. 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 Chicago O'Hare Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sofia to Chicago.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sofia to Chicago.
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41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$650
Typical prices: $632-$810
Multiple Airlines
Fri 2/20Tue 2/24
SOF - ORD • 1 stop
Cheapest one-way
$369
Typical prices: $516-$704
Multiple Airlines
Thu 2/19
SOF - ORD • 2 stops
Top airlines
KLM
Cheapest • from $656 (round-trip)
KLM
Best reviews • 7.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
5 weeks
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 8% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
July
Cheapest • 5% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to O'Hare Intl!
Flight Deals
Booking Insights
Flight Deals

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

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

Fri, Feb 20 - Tue, Feb 24
Multiple Airlines Logo
7:00 am - 2:20 pm
SOF
-
ORD
15h 20m
1 stop
Multiple Airlines Logo
5:20 pm - 1:55 pm
ORD
-
SOF
12h 35m
1 stop
$650Multiple Airlines
Mon, Mar 16 - Mon, Mar 23
Multiple Airlines Logo
7:00 am - 3:20 pm
SOF
-
ORD
15h 20m
1 stop
Multiple Airlines Logo
6:20 pm - 2:05 pm
ORD
-
SOF
12h 45m
1 stop
$652Multiple Airlines
Fri, Feb 20 - Wed, Feb 25
KLM Logo
7:00 am - 2:20 pm
SOF
-
ORD
15h 20m
1 stop
KLM Logo
4:25 pm - 2:05 pm
ORD
-
SOF
13h 40m
1 stop
$656KLM
Mon, Mar 16 - Mon, Mar 23
Multiple Airlines Logo
7:00 am - 3:20 pm
SOF
-
ORD
15h 20m
1 stop
Multiple Airlines Logo
1:37 pm - 2:05 pm
ORD
-
SOF
17h 28m
2 stops
$657Multiple Airlines
Fri, Feb 20 - Wed, Feb 25
KLM Logo
7:00 am - 2:20 pm
SOF
-
ORD
15h 20m
1 stop
KLM Logo
2:25 pm - 2:05 pm
ORD
-
SOF
15h 40m
2 stops
$660KLM
Thu, Feb 19 - Thu, Feb 26
Multiple Airlines Logo
7:00 am - 6:01 pm
SOF
-
ORD
19h 01m
2 stops
Multiple Airlines Logo
12:29 pm - 1:55 pm
ORD
-
SOF
17h 26m
2 stops
$667Multiple Airlines
Fri, Feb 20 - Wed, Feb 25
KLM Logo
7:00 am - 5:53 pm
SOF
-
ORD
18h 53m
2 stops
KLM Logo
12:29 pm - 2:05 pm
ORD
-
SOF
17h 36m
2 stops
$670KLM
Thu, Mar 5 - Wed, Apr 15
LOT Logo
2:35 pm - 8:00 pm
SOF
-
ORD
13h 25m
1 stop
LOT Logo
9:50 pm - 1:55 pm
ORD
-
SOF
32h 05m
1 stop
$673LOT
Sun, Mar 15 - Sun, Mar 22
Multiple Airlines Logo
7:00 am - 3:20 pm
SOF
-
ORD
15h 20m
1 stop
Multiple Airlines Logo
6:20 pm - 1:55 pm
ORD
-
SOF
12h 35m
1 stop
$695Multiple Airlines
Fri, Feb 20 - Fri, Feb 27
KLM Logo
7:00 am - 2:20 pm
SOF
-
ORD
15h 20m
1 stop
KLM Logo
4:25 pm - 2:05 pm
ORD
-
SOF
13h 40m
1 stop
$699KLM
Booking Insights

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

Get data-powered insights and trends into flights from Sofia to O'Hare Intl to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Sofia to Chicago O'Hare Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Sofia to Chicago O'Hare Intl Airport departing in February.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sofia to Chicago O'Hare Intl Airport, 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 Sofia to Chicago O'Hare Intl Airport is July, where tickets cost $692 (return) on average. On the other hand, the most expensive months are October and August, where the average cost of round-trip tickets is $778 and $763 respectively.

How far in advance should I book a flight from Sofia to Chicago O'Hare Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Sofia to Chicago O'Hare Intl Airport, 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 Sofia to Chicago O'Hare Intl Airport, you should book around 5 weeks before departure, which saves you about 8% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$369
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Sofia to Chicago O'Hare Airport

When to book flights from Sofia to O'Hare Intl

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

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

    In the last 3 days, the lowest price for a flight from Sofia to Chicago O'Hare Intl Airport was $369 for a one-way ticket and $650 for a round-trip.

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

    Yes

  • Which airports will I be using when flying from Sofia to Chicago O'Hare Airport?

    When flying out of Sofia you will be using Sofia. You will be landing at Chicago O'Hare Airport, also known as Chicago O'Hare Intl.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Sofia to Chicago are KLM and LOT. With an average price for the route of $749 and an overall rating of 7.7, KLM is the most popular choice. LOT is also a great choice for the route, with an average price of $696 and an overall rating of 7.5.

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

    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 Sofia to Chicago O'Hare Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from Sofia 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 Sofia to Chicago O'Hare Airport?

    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 Chicago O'Hare Airport with an airline and back to Sofia with another airline. Booking your flights between Sofia and ORD 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 Sofia to Chicago O'Hare Airport?

    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 Chicago O'Hare Airport from Sofia 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 Sofia to O'Hare Intl

 
See real verified KAYAK customer reviews for airlines flying from Sofia to Chicago. 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 Sofia to O'Hare Intl? 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.
7.7
KLMOverall score based on 1444 reviews
7.3Food
7.6Comfort
8.4Crew
7.1Entertainment
7.8Boarding
Airline reviews

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

4.0 OkayShereen, Dec 2025
Read more KLM reviews

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Couldn’t get boarding pass in SLC even with help from a redcoat, so had to find a desk in AMS to get boarding pass. Technical problems so not sure why. Very inconvenient. The KLM app is not as user friendly as most apps. Also had to wait almost an hour on the tarmac for a fuel truck, which caused us to miss a connecting bus in LUX.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

Ad experience - been flying many years with them but they are losing out to other carriers with their service and bagage / seating policy. My 2 12-yo kids were not placed with the parent. Absurdity.

KLM remains a quality flag carrier airline which maintains its standards whilst all their competitors are lowering theirs.

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

The service was great. However the lounge only gets passing grade

Krakow airport is very disorganized. nice seats. friendly crew. long legs had screens. short leg did not

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.

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.

Crew was excellent. Business class was poor on the short flight and mediocre at best on the international flight.

Boarding was delayed for an unknown reason for more than an hour. While the airplane was at the gate, the boarding time was moved by 10-20 minutes every 15 minutes. No entertainment on the plane.

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

This Japanese airline provides great service and very helpful in assisting their passengers.

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

I so appreciate the crew members on each flight of United. They are outstanding.

Reliable, nice crew, I fly often on that flight and I like it all.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

The staff was nice, however boarding taking 2 hours. That’s insane. Overall very bad experience, a lot of turbulence and when landed in Chicago was horrible. I don’t think I’ll flight with UA again.

An international flight on an apron is pretty unusual in my 40 years of traveling. Departure delay. Luggage despite over an hour connection did not make it to the flight. Actually still in Germany. My luggage was not moved until I reached my final destination despite knowing it to be left in Germany upon my arrival in Chicago. The service left me a little off, both going and returning from Europe. Light on in the cabin even during a night flight and lots of traffic no matter what. Maybe passengers want more service? As a frequent traveler i just want to be able to sleep, the food will be better at the destination anyway. So since the cabin crew woke me up I asked for a cocktail, I did not get the best response although sitting in row 20 premium economy. I usually fly premium economy or business and my 2 flight to Europe in 2025 with United both had luggage delays and other minor issues. American flights to Australia, Canada and Europe went smoothly and Premium plus feels very much like business light. Is United Club becoming a waste and Silver/Gold levels another waste??

The crew on this flight provided exceptional business class service to me.

The staff at the boarding or the rudest uninformative and no English whatsoever they’re very rude as if they are envious of you travelling I don’t understand how could someone would be this rude and this out of touch and cold

You charged me for luggage although the airline does not- you charged me for seat when customers can pick their own seat at checkout in I travel to Europe slot and I will not use kayak again

The seats were extremely small. Boarding was not communicated correctly. It wasn’t a pleasant trip.

They oversold the tickets by one which was my ticket so I didn’t have a ticket till last second

Not good. I was supposed to be in Mint but got in economy class

Requested food options were always finished. Supplied food items were good but of course not the desired choices.

The airport staff never announced that boarding has started. Both at iad or Islamabad or Istanbul.

Very bad experience with turkish airline tk 0001. Very uncomfortable seats and food ran out and crew was not helpful

The airline could improve its business class seats and privacy in line with its competitors.

We were in premium economy seats that appeared to be locked in plae, No reclining. My aching back.

I don’t understand how they charge as much as they do for such a poor experience

I wish the plane had pod seating for business class. I had a window seat (8K) and I had to climb over the person sitting on the aisle when I needed to get up. Also there is no partition between the seats for privacy when sleeping. The Asian airlines have much nicer business class seating. Their seats are wider for better comfort when sleeping.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

Food was poor quality and the screens for entertainment didn’t work properly

It was a short flight, everything was good with it.

I darted through the Frankfurt airport to make my connecting flight. I asked if it was a possibility to upgrade and the agent did. This was the kindest gesture and it made up for the previous delayed flight and distress/anxiety of anticipating that Zi was going to miss my Frankfurt-Chicago connection. I cannot express my gratitude for the upgrade.. I am 5feet 10 inches do the leg space was amazing.

I meant this flight was not good, the one from Tirana to Frankfurt was better!

I was very grateful for Lufthansa's role in organizing mobility support. The touchscreen on my seat was faulty: slow, stained (I couldn't get it clean), and glitchy. This made selecting movies extremely time consuming, and twice I had to start all over from the beginning.

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

Information on your arrival and departure airports