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Cheap flights from Chicago to Sofia from $268

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Sofia departing on 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Chicago to Sofia

Cheap round-trip flights

 Logo
10:40 am - 10:05 amORD-SOF
15h 25m2 stops
 Logo
6:00 am - 9:51 amSOF-ORD
35h 51m2 stops
Wed, Sep 17 - Wed, Oct 1
British Airways Logo
9:15 pm - 7:10 pmORD-SOF
13h 55m1 stop
British Airways Logo
9:30 pm - 6:15 pmSOF-ORD
28h 45m1 stop
$510British Airways
Find Deal
Sun, Aug 31 - Wed, Sep 10
Lufthansa Logo
4:00 pm - 1:15 pmORD-SOF
13h 15m1 stop
Lufthansa Logo
12:45 pm - 6:15 pmSOF-ORD
13h 30m1 stop
$519Lufthansa
Find Deal
Wed, Oct 1 - Wed, Oct 22
Turkish Airlines Logo
11:25 am - 2:45 pmORD-SOF
19h 20m1 stop
Turkish Airlines Logo
3:35 pm - 9:40 amSOF-ORD
26h 05m1 stop
$522Turkish Airlines
Find Deal
Wed, Aug 20 - Wed, Sep 3
United Airlines Logo
6:00 pm - 11:00 pmORD-SOF
21h 00m1 stop
United Airlines Logo
6:00 am - 2:05 pmSOF-ORD
16h 05m1 stop
$523United Airlines
Find Deal
Mon, Sep 15 - Fri, Oct 3
United Airlines Logo
6:00 pm - 11:00 pmORD-SOF
21h 00m1 stop
United Airlines Logo
6:20 am - 2:55 pmSOF-ORD
16h 35m1 stop
$531United Airlines
Find Deal
Mon, Sep 29 - Tue, Oct 7
Turkish Airlines Logo
11:25 am - 8:35 amORD-SOF
13h 10m1 stop
Turkish Airlines Logo
9:25 am - 10:00 pmSOF-ORD
20h 35m1 stop
$541Turkish Airlines
Find Deal
Wed, Sep 3 - Wed, Sep 17
Lufthansa Logo
3:35 pm - 12:00 pmORD-SOF
12h 25m1 stop
Lufthansa Logo
6:00 am - 12:30 pmSOF-ORD
14h 30m1 stop
$553Lufthansa
Find Deal
Mon, Aug 25 - Wed, Sep 10
KLM Logo
1:08 pm - 2:00 pmMDW-SOF
16h 52m2 stops
KLM Logo
7:00 am - 5:37 pmSOF-MDW
18h 37m2 stops
$645KLM
Find Deal
Wed, Aug 20 - Wed, Aug 27
KLM Logo
2:00 pm - 2:05 pmMDW-SOF
16h 05m2 stops
KLM Logo
7:00 am - 6:07 pmSOF-MDW
19h 07m2 stops
$680KLM
Find Deal
Wed, Nov 5 - Sun, Nov 9

Turkish Airlines flights from Chicago to Sofia

Our best Turkish Airlines deals on Chicago to Sofia flight tickets
Turkish Airlines
Aug 20
ORD11:25 amChicago O'Hare Intl
19h 20m
1 stop
SOF2:45 pmSofia
Sep 3
SOF3:35 pmSofia
26h 05m
1 stop
ORD9:40 amChicago O'Hare Intl
Turkish Airlines
Sep 3
ORD11:25 amChicago O'Hare Intl
13h 10m
1 stop
SOF8:35 amSofia
Sep 17
SOF9:25 amSofia
20h 35m
1 stop
ORD10:00 pmChicago O'Hare Intl

United Airlines flights from Chicago to Sofia

Our best United Airlines deals on Chicago to Sofia flight tickets
United Airlines
Sep 15
ORD6:00 pmChicago O'Hare Intl
21h 00m
1 stop
SOF11:00 pmSofia
Oct 3
SOF6:00 amSofia
16h 05m
1 stop
ORD2:05 pmChicago O'Hare Intl
United Airlines
Sep 29
ORD6:00 pmChicago O'Hare Intl
21h 00m
1 stop
SOF11:00 pmSofia
Oct 7
SOF6:20 amSofia
16h 35m
1 stop
ORD2:55 pmChicago O'Hare Intl
United Airlines
Sep 16
ORD4:20 pmChicago O'Hare Intl
11h 20m
1 stop
SOF11:40 amSofia
Sep 30
SOF2:00 pmSofia
33h 48m
2 stops
ORD3:48 pmChicago O'Hare Intl

See travel insights to Sofia from

How to get the cheapest flight ticket from Chicago to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Chicago and Sofia?

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Chicago is in February. Flight prices, which tend to average around $565, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Sofia from Chicago during March instead. Flights to Sofia in March, while not as cheap as those in February, still average around $588.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Thursday is the cheapest day to fly to Sofia from Chicago. The lowest ticket price found for a Thursday departure recently was $871. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Chicago to Sofia on a Saturday will generally be more expensive and average around $1,039. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

In the morning is the cheapest time of day to fly from Chicago to Sofia when you can find flight prices for as low as $801. Flying to Sofia in the morning is an ideal time because this is during off-peak travel hours. At noon is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,145 per ticket.

How far in advance should I book a flight to Sofia?

You are more likely to see cheaper flights to Sofia from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $780 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Chicago for as low as $736 on momondo.

How have Chicago to Sofia flight prices changed over time?

As of July 2025, prices for Chicago to Sofia flights are approximately 29% cheaper when compared to flights at the same time last year.

When to book flights from Chicago to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Sofia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago to Sofia (CHI to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Sofia

Best Price Found

$268

Fastest flight time

11h 20m

Direct flights

None

Airports in Sofia

1 airport
The best one-way flight to Sofia from Chicago in the past 72 hours is $268. The best round-trip flight deal from Chicago to Sofia found on momondo in the last 72 hours is $493.
The fastest flight from Chicago to Sofia takes 11h 20m
There are no direct flights from Chicago to Sofia. Popular non-direct routes for this connection are Chicago O'Hare Intl Airport - Sofia Airport and Chicago Midway Airport - Sofia Airport.
There is 1 airport near Sofia: Sofia (SOF)

  • How far is Chicago to Sofia by plane?

    A flight from Chicago to Sofia will travel around 5185.9 mi. A reasonable flight in good conditions will take 11h 20m.

  • When did momondo last update prices for flights from Chicago to Sofia Airport?

    Prices for flights from Chicago to Sofia Airport were last updated today.

  • How many operators does momondo search for flights from Chicago to Sofia Airport?

  • How old do you have to be to fly from Chicago to Sofia Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago to Sofia Airport.

  • What documentation or ID do you need to fly to Sofia Airport?

    The travel and health documents required for your trip to Sofia Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sofia Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Chicago to Sofia?


Best airlines flying from Chicago to Sofia

Compare and see reviews for airlines that fly from Chicago to Sofia with momondo
Airline
Rating
Free Cancellation
Price
Turkish AirlinesPriceFrom $494Free CancellationRating
7.3
3,895 reviews
Search Turkish Airlines flights
Air FrancePriceFrom $498Free CancellationRating
7.5
1,473 reviews
Search Air France flights
KLMPriceFrom $533Free CancellationRating
7.8
1,366 reviews
Search KLM flights
LOTPriceFrom $572Free CancellationRating
7.6
1,093 reviews
Search LOT flights
SWISSPriceFrom $596Free CancellationRating
7.5
1,654 reviews
Search SWISS flights
LufthansaPriceFrom $598Free CancellationRating
6.8
7,207 reviews
Search Lufthansa flights
Austrian AirlinesPriceFrom $605Free CancellationRating
7.6
809 reviews
Search Austrian Airlines flights
British AirwaysPriceFrom $613Free CancellationRating
6.6
7,093 reviews
Search British Airways flights
United AirlinesPriceFrom $616Free CancellationRating
7.4
8,861 reviews
Search United Airlines flights
Air SerbiaPriceFrom $652Free CancellationRating
6.3
197 reviews
Search Air Serbia flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Bansko
Velingrad
Borovets
Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Sofia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to Sofia. momondo saves you time and could save you money on your trip.

Can I find flights from Chicago to Sofia with flexible booking policies on momondo?

momondo does allow users to show only those flights to Sofia from Chicago which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Chicago to Sofia?

momondo helps you find the best flight between Chicago and Sofia by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Chicago to Sofia right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Sofia, momondo offers a useful price alert feature which will track prices for flights to Sofia from Chicago and alert you when they change.


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