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Cheap flights from Chicago O'Hare Intl Airport to Bulgaria from $329

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 O'Hare Intl Airport to Bulgaria departing on 9/29. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from Chicago O'Hare Intl Airport to Bulgaria

Cheap round-trip flights

Enter your travel dates to find the best prices.
LOT Logo
9:50 pm - 1:50 pmORD  Chicago O'Hare Intl-SOF Sofia
32h 00m1 stop Warsaw Frederic Chopin
LOT Logo
2:35 pm - 7:55 pmSOF  Sofia-ORD Chicago O'Hare Intl
13h 20m1 stop Warsaw Frederic Chopin
$733LOT
Tue, Nov 3 - Sun, Nov 15
LOT Logo
9:50 pm - 5:55 pmORD  Chicago O'Hare Intl-SOF Sofia
12h 05m1 stop Warsaw Frederic Chopin
LOT Logo
6:40 pm - 7:55 pmSOF  Sofia-ORD Chicago O'Hare Intl
33h 15m1 stop Warsaw Frederic Chopin
$733LOT
Fri, Jan 15 - Fri, Jan 29
Turkish Airlines Logo
8:10 pm - 3:00 pmORD  Chicago O'Hare Intl-SOF Sofia
34h 50m1 stop Istanbul
Turkish Airlines Logo
4:00 pm - 10:00 amSOF  Sofia-ORD Chicago O'Hare Intl
26h 00m1 stop Istanbul
$733Turkish Airlines
Sun, Sep 13 - Mon, Nov 9
Turkish Airlines Logo
8:10 pm - 8:20 pmORD  Chicago O'Hare Intl-SOF Sofia
16h 10m1 stop Istanbul
Turkish Airlines Logo
3:50 pm - 9:40 amSOF  Sofia-ORD Chicago O'Hare Intl
25h 50m1 stop Istanbul
$733Turkish Airlines
Sat, Oct 3 - Tue, Oct 20
SWISS Logo
6:50 pm - 3:05 pmORD  Chicago O'Hare Intl-SOF Sofia
12h 15m1 stop Zurich
SWISS Logo
3:00 pm - 4:15 pmSOF  Sofia-ORD Chicago O'Hare Intl
33h 15m1 stop Zurich
$733SWISS
Wed, Feb 10 - Mon, Feb 22
British Airways Logo
5:10 pm - 4:20 pmORD  Chicago O'Hare Intl-SOF Sofia
15h 10m1 stop London Heathrow
British Airways Logo
5:15 pm - 6:45 pmSOF  Sofia-ORD Chicago O'Hare Intl
33h 30m1 stop London Heathrow
$733British Airways
Sun, Feb 7 - Mon, Feb 22
British Airways Logo
9:50 pm - 8:10 pmORD  Chicago O'Hare Intl-SOF Sofia
14h 20m1 stop London Heathrow
British Airways Logo
5:15 pm - 1:45 pmSOF  Sofia-ORD Chicago O'Hare Intl
28h 30m1 stop London Heathrow
$733British Airways
Tue, Feb 9 - Mon, Feb 22
Multiple Airlines Logo
12:50 pm - 3:05 pmORD  Chicago O'Hare Intl-SOF Sofia
18h 15m2 stops Toronto Pearson Intl Zurich
Multiple Airlines Logo
2:10 pm - 2:52 pmSOF  Sofia-ORD Chicago O'Hare Intl
32h 42m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl
$735Multiple Airlines
Wed, Nov 18 - Wed, Dec 2
Air Canada Logo
10:37 am - 1:15 pmORD  Chicago O'Hare Intl-SOF Sofia
18h 38m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss
Air Canada Logo
11:50 am - 9:59 pmSOF  Sofia-ORD Chicago O'Hare Intl
18h 09m2 stops Frankfurt am Main Toronto Pearson Intl
$736Air Canada
Wed, Nov 11 - Thu, Apr 1
SWISS Logo
6:50 pm - 1:15 pmORD  Chicago O'Hare Intl-SOF Sofia
34h 25m2 stops Zurich Munich Franz Josef Strauss
SWISS Logo
3:00 pm - 4:15 pmSOF  Sofia-ORD Chicago O'Hare Intl
33h 15m1 stop Zurich
$756SWISS
Tue, Feb 9 - Mon, Feb 22

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Air Serbia flights from Chicago O'Hare Intl Airport to Bulgaria

Our best Air Serbia deals on Chicago O'Hare Intl Airport to Bulgaria flight tickets
Air Serbia
Aug 19
ORD4:40 pmChicago O'Hare Intl
26h 20m
1 stop
SOF3:00 amSofia
Sep 1
SOF4:00 pmSofia
30h 30m
1 stop
ORD2:30 pmChicago O'Hare Intl
$870
Air Serbia
Aug 19
ORD4:40 pmChicago O'Hare Intl
14h 50m
1 stop
SOF3:30 pmSofia
Sep 6
SOF4:00 pmSofia
30h 30m
1 stop
ORD2:30 pmChicago O'Hare Intl
$872
Air Serbia
Aug 31
ORD4:40 pmChicago O'Hare Intl
14h 50m
1 stop
SOF3:30 pmSofia
Sep 13
SOF4:00 pmSofia
30h 30m
1 stop
ORD2:30 pmChicago O'Hare Intl
$873

Turkish Airlines flights from Chicago O'Hare Intl Airport to Bulgaria

Our best Turkish Airlines deals on Chicago O'Hare Intl Airport to Bulgaria flight tickets
Turkish Airlines
Sep 13
ORD8:10 pmChicago O'Hare Intl
28h 35m
1 stop
SOF8:45 amSofia
Nov 9
SOF4:00 pmSofia
26h 00m
1 stop
ORD10:00 amChicago O'Hare Intl
$733
Turkish Airlines
Sep 23
ORD8:10 pmChicago O'Hare Intl
16h 10m
1 stop
SOF8:20 pmSofia
Oct 7
SOF3:50 pmSofia
25h 50m
1 stop
ORD9:40 amChicago O'Hare Intl
$734
Turkish Airlines
Sep 23
ORD8:10 pmChicago O'Hare Intl
28h 35m
1 stop
SOF8:45 amSofia
Oct 8
SOF9:10 pmSofia
20h 30m
1 stop
ORD9:40 amChicago O'Hare Intl
$735

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport 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 17, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Bulgaria that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Tue 11/3

9:50 pm-1:50 pm

1 stop32h 00m

Sofia

Sun 11/15

2:35 pm-7:55 pm

1 stop13h 20m

$733

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Fri 1/15

9:50 pm-5:55 pm

1 stop12h 05m

Sofia

Fri 1/29

6:40 pm-7:55 pm

1 stop33h 15m

$733

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Sun 9/13

8:10 pm-3:00 pm

1 stop34h 50m

Sofia

Mon 11/9

4:00 pm-10:00 am

1 stop26h 00m

$733

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Sat 10/3

8:10 pm-8:20 pm

1 stop16h 10m

Sofia

Tue 10/20

3:50 pm-9:40 am

1 stop25h 50m

$733

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Wed 2/10

6:50 pm-3:05 pm

1 stop12h 15m

Sofia

Mon 2/22

3:00 pm-4:15 pm

1 stop33h 15m

$733

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Sun 2/7

5:10 pm-4:20 pm

1 stop15h 10m

Sofia

Mon 2/22

5:15 pm-6:45 pm

1 stop33h 30m

$733

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Tue 2/9

9:50 pm-8:10 pm

1 stop14h 20m

Sofia

Mon 2/22

5:15 pm-1:45 pm

1 stop28h 30m

$733

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Wed 11/18

12:50 pm-3:05 pm

2 stops18h 15m

Sofia

Wed 12/2

2:10 pm-2:52 pm

2 stops32h 42m

$735
Quickest round-trip

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Wed 11/11

10:37 am-1:15 pm

2 stops18h 38m

Sofia

Thu 4/1

11:50 am-9:59 pm

2 stops18h 09m

$736

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Tue 2/9

6:50 pm-1:15 pm

2 stops34h 25m

Sofia

Mon 2/22

3:00 pm-4:15 pm

1 stop33h 15m

$756

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 O'Hare Intl Airport 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 January is also cheap. Prices for this month can be found on momondo for an average of $601.

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

You are more likely to see cheaper flights to Bulgaria from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Bulgaria for around $796 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bulgaria from Chicago O'Hare Intl Airport for as low as $736 on momondo.

Cheap Chicago O'Hare Intl Airport to Bulgaria flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Bulgaria

Best Price Found

$329

Fastest flight time

13h 00m

Direct flights

None
The best one-way flight to Bulgaria from Chicago O'Hare Intl Airport in the past 72 hours is $329. The best round-trip flight deal from Chicago O'Hare Intl Airport to Bulgaria found on momondo in the last 72 hours is $733.
The fastest flight from Chicago O'Hare Intl Airport to Bulgaria takes 13h 00m
There are no direct flights from Chicago O'Hare Intl Airport to Bulgaria. There are no popular flight routes from Chicago O'Hare Intl Airport to Bulgaria.
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Frequently asked questions about flying from Chicago O'Hare Intl Airport to Bulgaria

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Bulgaria?

    Prices for flights from Chicago O'Hare Intl Airport to Bulgaria were last updated today.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Bulgaria?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to Bulgaria?

    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 O'Hare Intl Airport 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 O'Hare Intl Airport to Bulgaria

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Bulgaria with momondo
Airline
Rating
Free Cancellation
Price
Turkish AirlinesPriceFrom $524Free CancellationRating
7.4
4,472 reviews
Search Turkish Airlines flights
LOTPriceFrom $580Free CancellationRating
7.5
1,212 reviews
Search LOT flights
Air FrancePriceFrom $585Free CancellationRating
7.5
1,646 reviews
Search Air France flights
SWISSPriceFrom $594Free CancellationRating
7.5
2,034 reviews
Search SWISS flights
LufthansaPriceFrom $607Free CancellationRating
6.8
8,194 reviews
Search Lufthansa flights
United AirlinesPriceFrom $608Free CancellationRating
7.4
10,106 reviews
Search United Airlines flights
British AirwaysPriceFrom $609Free CancellationRating
6.7
8,170 reviews
Search British Airways flights
KLMPriceFrom $614Free CancellationRating
7.8
1,560 reviews
Search KLM flights
Austrian AirlinesPriceFrom $701Free CancellationRating
7.6
947 reviews
Search Austrian Airlines flights
Air SerbiaPriceFrom $703Free CancellationRating
6.2
234 reviews
Search Air Serbia flights

Why use momondo?

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

Finding the right flight to Bulgaria from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Bulgaria quick and easy, saving you time and money.

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

All flight searches from Chicago to Bulgaria on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Chicago and Bulgaria 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 Bulgaria right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Chicago to Bulgaria flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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