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Cheap flights from Chicago to Bulgaria from $246

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 Bulgaria departing on 10/4. 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 Bulgaria

Cheap round-trip flights

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
Mon, Sep 15 - Mon, Oct 6
Logo
7:05 pm - 12:30 pmORD-SOF
33h 25m1 stop
Logo
12:45 pm - 9:51 amSOF-ORD
29h 06m2 stops
$490
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, Sep 21 - Fri, Oct 17
Turkish Airlines Logo
11:25 am - 8:35 amORD-SOF
13h 10m1 stop
Turkish Airlines Logo
4:00 pm - 10:05 amSOF-ORD
26h 05m1 stop
$507Turkish Airlines
Find Deal
Tue, Aug 12 - Thu, Nov 20
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 29 - Tue, Oct 7
Turkish Airlines Logo
11:25 am - 2:45 pmORD-SOF
19h 20m1 stop
Turkish Airlines Logo
9:15 pm - 9:40 amSOF-ORD
20h 25m1 stop
$519Turkish Airlines
Find Deal
Tue, Aug 19 - Wed, Sep 17
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
Tue, Sep 30 - Tue, Oct 14
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
Mon, Sep 22 - Mon, Sep 29
KLM Logo
9:35 am - 2:00 pmMDW-SOF
20h 25m2 stops
KLM Logo
7:00 am - 6:25 pmSOF-MDW
19h 25m2 stops
$867KLM
Find Deal
Thu, Oct 16 - Mon, Oct 20
KLM Logo
9:35 am - 2:00 pmMDW-SOF
20h 25m2 stops
KLM Logo
7:00 am - 6:25 pmSOF-MDW
19h 25m2 stops
$896KLM
Find Deal
Fri, Oct 17 - Tue, Oct 21

SWISS flights from Chicago to Bulgaria

Our best SWISS deals on Chicago to Bulgaria flight tickets
SWISS
Aug 31
ORD7:05 pmChicago O'Hare Intl
11h 40m
1 stop
SOF2:45 pmSofia
Sep 16
SOF1:15 pmSofia
34h 40m
1 stop
ORD3:55 pmChicago O'Hare Intl
$511
Find similar
SWISS
Sep 15
ORD7:05 pmChicago O'Hare Intl
31h 00m
1 stop
SOF10:05 amSofia
Oct 6
SOF3:30 pmSofia
32h 25m
1 stop
ORD3:55 pmChicago O'Hare Intl
$516
Find similar
SWISS
Aug 11
ORD2:20 pmChicago O'Hare Intl
14h 10m
1 stop
SOF12:30 pmSofia
Sep 15
SOF3:30 pmSofia
32h 25m
1 stop
ORD3:55 pmChicago O'Hare Intl
$596
Find similar

United Airlines flights from Chicago to Bulgaria

Our best United Airlines deals on Chicago to Bulgaria flight tickets
United Airlines
Sep 30
ORD4:20 pmChicago O'Hare Intl
11h 20m
1 stop
SOF11:40 amSofia
Oct 14
SOF6:00 amSofia
19h 33m
2 stops
ORD5:33 pmChicago O'Hare Intl
$534
Find similar
United Airlines
Sep 22
ORD3:35 pmChicago O'Hare Intl
12h 25m
1 stop
SOF12:00 pmSofia
Sep 29
SOF12:00 pmSofia
34h 55m
2 stops
ORD2:55 pmChicago O'Hare Intl
$549
Find similar
United Airlines
Sep 22
ORD6:30 amChicago O'Hare Intl
32h 30m
2 stops
SOF11:00 pmSofia
Sep 29
SOF12:00 pmSofia
34h 55m
2 stops
ORD2:55 pmChicago O'Hare Intl
$553
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago to Bulgaria that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 2, 2025.
Use the filters below to find and compare flights from Chicago to Bulgaria that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 9/15

4:20 pm-6:10 pm

1 stop17h 50m

Sofia

Mon 10/6

6:55 pm-1:20 pm

1 stop26h 25m

$489

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 9/21

7:05 pm-12:30 pm

1 stop33h 25m

Sofia

Fri 10/17

12:45 pm-9:51 am

2 stops29h 06m

$490

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 9/21

3:35 pm-12:00 pm

1 stop12h 25m

Sofia

Fri 10/17

6:15 am-12:55 pm

1 stop14h 40m

$502

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 8/12

11:25 am-8:35 am

1 stop13h 10m

Sofia

Thu 11/20

4:00 pm-10:05 am

1 stop26h 05m

$507

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 9/29

3:35 pm-12:00 pm

1 stop12h 25m

Sofia

Tue 10/7

6:00 am-12:30 pm

1 stop14h 30m

$517

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 8/19

11:25 am-2:45 pm

1 stop19h 20m

Sofia

Wed 9/17

9:15 pm-9:40 am

1 stop20h 25m

$519

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 9/30

4:20 pm-11:40 am

1 stop11h 20m

Sofia

Tue 10/14

6:00 am-5:33 pm

2 stops19h 33m

$534

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 9/22

3:35 pm-12:00 pm

1 stop12h 25m

Sofia

Mon 9/29

12:00 pm-2:55 pm

2 stops34h 55m

$549

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Thu 10/16

9:35 am-2:00 pm

2 stops20h 25m

Sofia

Mon 10/20

7:00 am-6:25 pm

2 stops19h 25m

$867

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Fri 10/17

9:35 am-2:00 pm

2 stops20h 25m

Sofia

Tue 10/21

7:00 am-6:25 pm

2 stops19h 25m

$896

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Bulgaria from

How to get the cheapest flight ticket from Chicago to Bulgaria

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 cheapest month to fly to Bulgaria?

If you aren’t able to travel to Bulgaria during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $588.

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

The cheapest day to depart from Chicago to Bulgaria is on a Thursday when prices can be found for as low as $885. On the other hand, Monday is the most expensive day to depart from Chicago because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,047.

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

In the morning is the cheapest time of day to fly from Chicago to Bulgaria when you can find flight prices for as low as $751. Flying to Bulgaria in the morning is an ideal time because this is during off-peak travel hours. Flights to Bulgaria are more costly at noon, with an average ticket price of $1,107. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Bulgaria from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Bulgaria for around $771 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bulgaria from Chicago for as low as $730 on momondo.

Cheap Chicago to Bulgaria flight deals and tips

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

Best Price Found

$246

Fastest flight time

11h 20m

Direct flights

None

Airports in Bulgaria

3 airports
The best one-way flight to Bulgaria from Chicago in the past 72 hours is $246. The best round-trip flight deal from Chicago to Bulgaria found on momondo in the last 72 hours is $489.
The fastest flight from Chicago to Bulgaria takes 11h 20m
There are no direct flights from Chicago to Bulgaria. Popular non-direct route for this connection is Chicago O'Hare Intl Airport - Sofia Airport.
There are 3 airports near Bulgaria: Varna (VAR), Sofia (SOF), Bourgas (BOJ)
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  • When did momondo last update prices for flights from Chicago to Bulgaria?

    Prices for flights from Chicago to Bulgaria were last updated today.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Bulgaria.

  • What documentation or ID do you need to fly to Bulgaria?

    The necessary travel and health documents for your Bulgaria trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Chicago to Bulgaria

Compare and see reviews for airlines that fly from Chicago to Bulgaria with momondo
Airline
Rating
Free Cancellation
Price
Turkish AirlinesPriceFrom $494Free CancellationRating
7.3
3,935 reviews
Search Turkish Airlines flights
Air FrancePriceFrom $498Free CancellationRating
7.5
1,465 reviews
Search Air France flights
KLMPriceFrom $533Free CancellationRating
7.8
1,384 reviews
Search KLM flights
LOTPriceFrom $571Free CancellationRating
7.6
1,106 reviews
Search LOT flights
LufthansaPriceFrom $588Free CancellationRating
6.8
7,276 reviews
Search Lufthansa flights
Austrian AirlinesPriceFrom $588Free CancellationRating
7.6
823 reviews
Search Austrian Airlines flights
SWISSPriceFrom $596Free CancellationRating
7.5
1,686 reviews
Search SWISS flights
United AirlinesPriceFrom $601Free CancellationRating
7.4
8,904 reviews
Search United Airlines flights
British AirwaysPriceFrom $613Free CancellationRating
6.6
7,224 reviews
Search British Airways flights
Air SerbiaPriceFrom $652Free CancellationRating
6.3
196 reviews
Search Air Serbia flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Chicago to Bulgaria for you.

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

Yes. momondo allows you to filter the results for Chicago to Bulgaria flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Bulgaria from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Bulgaria from Chicago are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Find better results for your trip to Bulgaria

Popular cities in Bulgaria

Popular flights according to clicks in the last 7 days on momondo
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