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Cheap flights from St. Louis to Bulgaria from $778

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Bulgaria departing on 8/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Bulgaria

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:51 am - 2:00 pm
STL
-
SOF
18h 09m
2 stops
Multiple Airlines Logo
7:00 am - 11:37 pm
SOF
-
STL
24h 37m
2 stops
$778Multiple Airlines
Mon, Aug 10 - Wed, Aug 19
United Airlines Logo
5:33 pm - 11:15 pm
STL
-
SOF
21h 42m
2 stops
United Airlines Logo
6:30 am - 10:16 pm
SOF
-
STL
23h 46m
2 stops
$781United Airlines
Sun, Aug 2 - Thu, Aug 20
United Airlines Logo
1:24 pm - 12:10 pm
STL
-
SOF
14h 46m
2 stops
United Airlines Logo
6:10 am - 6:56 pm
SOF
-
STL
20h 46m
2 stops
$782United Airlines
Tue, Aug 11 - Wed, Aug 26
KLM Logo
1:22 pm - 2:00 pm
STL
-
SOF
16h 38m
2 stops
KLM Logo
7:00 am - 11:37 pm
SOF
-
STL
24h 37m
2 stops
$783KLM
Wed, Aug 5 - Wed, Aug 19
United Airlines Logo
3:30 pm - 6:00 pm
STL
-
SOF
18h 30m
1 stop
United Airlines Logo
6:30 am - 10:16 pm
SOF
-
STL
23h 46m
2 stops
$788United Airlines
Tue, Aug 4 - Thu, Aug 20
United Airlines Logo
3:30 pm - 1:05 pm
STL
-
SOF
13h 35m
1 stop
United Airlines Logo
6:10 am - 8:39 pm
SOF
-
STL
22h 29m
2 stops
$790United Airlines
Tue, Aug 11 - Tue, Aug 25
United Airlines Logo
4:48 pm - 11:15 pm
STL
-
SOF
22h 27m
2 stops
United Airlines Logo
2:20 pm - 1:25 pm
SOF
-
STL
31h 05m
1 stop
$791United Airlines
Sun, Aug 2 - Mon, Aug 24
United Airlines Logo
3:30 pm - 1:05 pm
STL
-
SOF
13h 35m
1 stop
United Airlines Logo
2:20 pm - 1:25 pm
SOF
-
STL
31h 05m
1 stop
$799United Airlines
Tue, Aug 4 - Mon, Aug 24
Lufthansa Logo
6:55 pm - 6:40 pm
STL
-
SOF
39h 45m
2 stops
Lufthansa Logo
7:25 pm - 9:22 pm
SOF
-
STL
33h 57m
2 stops
$803Lufthansa
Sat, Aug 15 - Tue, Aug 25
Lufthansa Logo
6:49 pm - 6:40 pm
STL
-
SOF
15h 51m
2 stops
Lufthansa Logo
6:10 am - 2:55 pm
SOF
-
STL
15h 45m
1 stop
$806Lufthansa
Tue, Oct 20 - Wed, Oct 28

United Airlines flights from St. Louis to Bulgaria

Our best United Airlines deals on St. Louis to Bulgaria flight tickets
United Airlines
Aug 2
STL5:33 pmLambert-St Louis
21h 42m
2 stops
SOF11:15 pmSofia
Aug 20
SOF6:30 amSofia
23h 46m
2 stops
STL10:16 pmLambert-St Louis
$781
United Airlines
Aug 11
STL1:24 pmLambert-St Louis
14h 46m
2 stops
SOF12:10 pmSofia
Aug 26
SOF6:10 amSofia
20h 46m
2 stops
STL6:56 pmLambert-St Louis
$782
United Airlines
Aug 4
STL3:30 pmLambert-St Louis
18h 30m
1 stop
SOF6:00 pmSofia
Aug 20
SOF6:30 amSofia
23h 46m
2 stops
STL10:16 pmLambert-St Louis
$788

KLM flights from St. Louis to Bulgaria

Our best KLM deals on St. Louis to Bulgaria flight tickets
KLM
Aug 5
STL1:22 pmLambert-St Louis
16h 38m
2 stops
SOF2:00 pmSofia
Aug 19
SOF7:00 amSofia
24h 37m
2 stops
STL11:37 pmLambert-St Louis
$783
KLM
Jul 29
STL10:51 amLambert-St Louis
19h 09m
2 stops
SOF2:00 pmSofia
Aug 19
SOF7:00 amSofia
19h 00m
2 stops
STL6:00 pmLambert-St Louis
$817
KLM
Aug 5
STL1:22 pmLambert-St Louis
16h 38m
2 stops
SOF2:00 pmSofia
Aug 22
SOF7:00 amSofia
19h 02m
2 stops
STL6:02 pmLambert-St Louis
$833

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis 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 April 30, 2026.
Use the filters below to find and compare flights from St. Louis to Bulgaria that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Mon 8/10

11:51 am-2:00 pm

2 stops18h 09m

Sofia

Wed 8/19

7:00 am-11:37 pm

2 stops24h 37m

$778

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 8/2

5:33 pm-11:15 pm

2 stops21h 42m

Sofia

Thu 8/20

6:30 am-10:16 pm

2 stops23h 46m

$781

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 8/11

1:24 pm-12:10 pm

2 stops14h 46m

Sofia

Wed 8/26

6:10 am-6:56 pm

2 stops20h 46m

$782

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 8/5

1:22 pm-2:00 pm

2 stops16h 38m

Sofia

Wed 8/19

7:00 am-11:37 pm

2 stops24h 37m

$783

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 8/4

3:30 pm-6:00 pm

1 stop18h 30m

Sofia

Thu 8/20

6:30 am-10:16 pm

2 stops23h 46m

$788

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 8/11

3:30 pm-1:05 pm

1 stop13h 35m

Sofia

Tue 8/25

6:10 am-8:39 pm

2 stops22h 29m

$790

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 8/2

4:48 pm-11:15 pm

2 stops22h 27m

Sofia

Mon 8/24

2:20 pm-1:25 pm

1 stop31h 05m

$791

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 8/4

3:30 pm-1:05 pm

1 stop13h 35m

Sofia

Mon 8/24

2:20 pm-1:25 pm

1 stop31h 05m

$799

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sat 8/15

6:55 pm-6:40 pm

2 stops39h 45m

Sofia

Tue 8/25

7:25 pm-9:22 pm

2 stops33h 57m

$803
Quickest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 10/20

6:49 pm-6:40 pm

2 stops15h 51m

Sofia

Wed 10/28

6:10 am-2:55 pm

1 stop15h 45m

$806

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Bulgaria from

How to get the cheapest flight ticket from St. Louis 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 October, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $524.

How far in advance should I book a flight from St. Louis to Bulgaria?

You are more likely to see cheaper flights to Bulgaria from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Bulgaria for around $847 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bulgaria from St. Louis for as low as $746 on momondo.

Can stopping save me money on St. Louis to Bulgaria flights?

You could potentially save up to 39% on your flight if you consider stops on a St. Louis to Bulgaria flight.

Cheap St. Louis to Bulgaria flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Bulgaria

Fastest flight time

15h 40m

Direct flights

None
The fastest flight from St. Louis to Bulgaria takes 15h 40m
There are no direct flights from St. Louis to Bulgaria. There are no popular flight routes from St. Louis to Bulgaria.
Search flight deals

Frequently asked questions about flying from St. Louis to Bulgaria

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Bulgaria?

    Prices for flights from Lambert-St Louis Airport to Bulgaria are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Bulgaria?

  • How old do you have to be to fly from Lambert-St Louis 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 Lambert-St Louis Airport to Bulgaria.

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

    The travel and health documents required for your trip to Bulgaria 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 Bulgaria. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from St. Louis to Bulgaria

Compare and see reviews for airlines that fly from St. Louis to Bulgaria with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $560Free CancellationRating
7.4
9,678 reviews
Search United Airlines flights
LufthansaPriceFrom $598Free CancellationRating
6.8
7,962 reviews
Search Lufthansa flights
Air CanadaPriceFrom $1,108Free CancellationRating
7.1
10,981 reviews
Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Bulgaria?

Finding the right flight to Bulgaria from St. Louis 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 St. Louis to Bulgaria with flexible booking policies on momondo?

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

How can momondo help me find flights from St. Louis to Bulgaria?

momondo helps you find the best flight between St. Louis 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 St. Louis to Bulgaria right now. Can momondo alert me if prices change?

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

An easier way to manage your Bulgaria trip

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Find better results for your trip to Bulgaria

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