Find Cheap Flights to Bulgaria

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from Chicago O'Hare International to Bulgaria

(Round-trip)
Depart: Mon Aug 28 2017 Return: Thu Sep 28 2017 Trip spans 32 days
Multiple Airlines
Multiple Airlines
ORD
12:00a
SOF
7:35p
19h 35m
2 stops
SOF
12:00a
ORD
9:05p
21h 05m
2 stops
Depart: Mon Feb 12 2018 Return: Mon Feb 19 2018 Trip spans 8 days
United
United
ORD
12:00a
SOF
12:50p
12h 50m
1 stop
SOF
12:00a
ORD
4:30p
16h 30m
1 stop
Depart: Sat Feb 3 2018 Return: Tue Feb 13 2018 Trip spans 11 days
American Airlines
American Airlines
ORD
12:00a
SOF
10:15a
34h 15m
1 stop
SOF
12:00a
ORD
8:50a
32h 50m
1 stop
Depart: Mon Aug 28 2017 Return: Tue Sep 12 2017 Trip spans 16 days
SWISS
SWISS
ORD
12:00a
SOF
5:15p
17h 15m
1 stop
SOF
12:00a
ORD
2:20a
26h 20m
1 stop
Depart: Sun Aug 27 2017 Return: Wed Sep 13 2017 Trip spans 18 days
Lufthansa
Lufthansa
ORD
12:00a
SOF
5:15p
17h 15m
1 stop
SOF
12:00a
ORD
8:20p
20h 20m
1 stop
Depart: Tue Aug 29 2017 Return: Wed Sep 6 2017 Trip spans 9 days
Austrian Airlines
Austrian Airlines
ORD
12:00a
SOF
5:40p
17h 40m
1 stop
SOF
12:00a
ORD
1:05a
25h 05m
1 stop
Depart: Thu Aug 24 2017 Return: Mon Sep 11 2017 Trip spans 19 days
British Airways
British Airways
ORD
12:00a
SOF
8:15p
20h 15m
1 stop
SOF
12:00a
ORD
3:55a
27h 55m
1 stop
Depart: Sat Aug 26 2017 Return: Thu Sep 28 2017 Trip spans 34 days
KLM
KLM
ORD
12:00a
SOF
4:56p
16h 56m
2 stops
SOF
12:00a
ORD
2:45p
14h 45m
1 stop
Depart: Sun Aug 27 2017 Return: Mon Sep 25 2017 Trip spans 30 days
Alitalia
Alitalia
ORD
12:00a
SOF
7:10p
19h 10m
1 stop
SOF
12:00a
ORD
2:05a
26h 05m
1 stop
Depart: Wed Dec 27 2017 Return: Sat Dec 30 2017 Trip spans 4 days
Air Canada
Air Canada
ORD
12:00a
SOF
9:35a
33h 35m
2 stops
SOF
12:00a
ORD
6:47a
54h 47m
2 stops
Depart: Sun Aug 27 2017 Return: Sun Sep 24 2017 Trip spans 29 days
Air Serbia
Air Serbia
ORD
12:00a
SOF
4:05p
16h 05m
2 stops
SOF
12:00a
ORD
3:45a
27h 45m
2 stops
Depart: Sun Aug 27 2017 Return: Mon Sep 25 2017 Trip spans 30 days
Qatar Airways
Qatar Airways
ORD
12:00a
SOF
4:00p
40h 00m
1 stop
SOF
12:00a
ORD
9:25a
33h 25m
1 stop
Depart: Tue Aug 29 2017 Return: Sun Sep 24 2017 Trip spans 27 days
Turkish Airlines
Turkish Airlines
ORD
12:00a
SOF
3:25a
27h 25m
1 stop
SOF
12:00a
ORD
3:55a
27h 55m
1 stop
Depart: Sat Aug 26 2017 Return: Sat Sep 30 2017 Trip spans 36 days
$1012
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LOT Polish Airlines
LOT Polish Airlines
ORD
12:00a
SOF
11:50a
11h 50m
1 stop
SOF
12:00a
ORD
4:55a
28h 55m
1 stop
Depart: Mon Aug 28 2017 Return: Wed Sep 27 2017 Trip spans 31 days
Multiple Airlines
Multiple Airlines
ORD
12:00a
SOF
7:35p
19h 35m
2 stops
SOF
12:00a
ORD
8:50a
32h 50m
2 stops
Depart: Mon Feb 19 2018 Return: Mon Feb 26 2018 Trip spans 8 days
United
United
ORD
12:00a
SOF
12:50p
12h 50m
1 stop
SOF
12:00a
ORD
4:30p
16h 30m
1 stop
Depart: Sun Feb 4 2018 Return: Wed Feb 14 2018 Trip spans 11 days
American Airlines
American Airlines
ORD
12:00a
SOF
10:15a
34h 15m
1 stop
SOF
12:00a
ORD
8:50a
32h 50m
1 stop
Depart: Sun Aug 27 2017 Return: Wed Sep 13 2017 Trip spans 18 days
Multiple Airlines
Multiple Airlines
ORD
12:00a
SOF
8:55p
20h 55m
2 stops
SOF
12:00a
ORD
4:35a
28h 35m
2 stops
Depart: Mon Aug 28 2017 Return: Wed Sep 13 2017 Trip spans 17 days
Lufthansa
Lufthansa
ORD
12:00a
SOF
8:30p
20h 30m
1 stop
SOF
12:00a
ORD
8:20p
20h 20m
1 stop
Depart: Sun Feb 11 2018 Return: Wed Feb 21 2018 Trip spans 11 days
American Airlines
American Airlines
ORD
12:00a
SOF
7:15a
31h 15m
1 stop
SOF
12:00a
ORD
5:20a
29h 20m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
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Airports
Origin

Chicago
$613
Destination

Sofia
$613