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Cheap flights from St. Louis to Bulgaria from $300

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Bulgaria departing on 8/12. 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 St. Louis to Bulgaria

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:30 am - 12:10 pm
STL
-
SOF
19h 40m
2 stops
United Airlines Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$654United Airlines
Wed, Apr 22 - Wed, Apr 29
Multiple Airlines Logo
11:42 am - 2:00 pm
STL
-
SOF
18h 18m
2 stops
Multiple Airlines Logo
7:00 am - 8:44 pm
SOF
-
STL
21h 44m
2 stops
$661Multiple Airlines
Wed, Apr 22 - Wed, Apr 29
Lufthansa Logo
6:55 pm - 6:40 pm
STL
-
SOF
15h 45m
2 stops
Lufthansa Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$690Lufthansa
Sun, Apr 26 - Sun, May 3
Lufthansa Logo
8:30 am - 12:10 pm
STL
-
SOF
19h 40m
2 stops
Lufthansa Logo
6:10 am - 9:13 pm
SOF
-
STL
23h 03m
2 stops
$703Lufthansa
Thu, Apr 23 - Thu, Apr 30
Lufthansa Logo
3:30 pm - 1:25 pm
STL
-
SOF
13h 55m
1 stop
Lufthansa Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$704Lufthansa
Wed, Apr 22 - Wed, Apr 29
United Airlines Logo
8:15 pm - 10:30 pm
STL
-
SOF
18h 15m
2 stops
United Airlines Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$716United Airlines
Fri, Apr 10 - Fri, May 1
Lufthansa Logo
8:30 am - 12:10 pm
STL
-
SOF
19h 40m
2 stops
Lufthansa Logo
2:10 pm - 1:25 pm
SOF
-
STL
31h 15m
1 stop
$719Lufthansa
Thu, Apr 23 - Thu, Apr 30
United Airlines Logo
9:10 am - 1:15 pm
STL
-
SOF
20h 05m
2 stops
United Airlines Logo
6:20 am - 12:24 am
SOF
-
STL
26h 04m
2 stops
$726United Airlines
Fri, Apr 10 - Fri, May 1
Air Canada Logo
4:05 pm - 6:40 pm
STL
-
SOF
18h 35m
2 stops
Air Canada Logo
6:20 am - 8:25 pm
SOF
-
STL
22h 05m
2 stops
$729Air Canada
Sun, Apr 26 - Sun, May 3
Multiple Airlines Logo
4:05 pm - 6:40 pm
STL
-
SOF
18h 35m
2 stops
Multiple Airlines Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$733Multiple Airlines
Sun, Apr 26 - Sun, May 3

United Airlines flights from St. Louis to Bulgaria

Our best United Airlines deals on St. Louis to Bulgaria flight tickets
United Airlines
Apr 22
STL8:30 amLambert-St Louis
19h 40m
2 stops
SOF12:10 pmSofia
Apr 29
SOF6:20 amSofia
15h 05m
1 stop
STL1:25 pmLambert-St Louis
$654
United Airlines
Apr 10
STL8:15 pmLambert-St Louis
18h 15m
2 stops
SOF10:30 pmSofia
May 1
SOF6:20 amSofia
15h 05m
1 stop
STL1:25 pmLambert-St Louis
$716
United Airlines
Apr 10
STL9:10 amLambert-St Louis
20h 05m
2 stops
SOF1:15 pmSofia
May 1
SOF6:20 amSofia
26h 04m
2 stops
STL12:24 amLambert-St Louis
$726

Lufthansa flights from St. Louis to Bulgaria

Our best Lufthansa deals on St. Louis to Bulgaria flight tickets
Lufthansa
Apr 26
STL6:55 pmLambert-St Louis
15h 45m
2 stops
SOF6:40 pmSofia
May 3
SOF6:20 amSofia
15h 05m
1 stop
STL1:25 pmLambert-St Louis
$690
Lufthansa
Apr 23
STL8:30 amLambert-St Louis
19h 40m
2 stops
SOF12:10 pmSofia
Apr 30
SOF6:10 amSofia
23h 03m
2 stops
STL9:13 pmLambert-St Louis
$703
Lufthansa
Apr 22
STL3:30 pmLambert-St Louis
13h 55m
1 stop
SOF1:25 pmSofia
Apr 29
SOF6:20 amSofia
15h 05m
1 stop
STL1:25 pmLambert-St Louis
$704

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 March 12, 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

Wed 4/22

8:30 am-12:10 pm

2 stops19h 40m

Sofia

Wed 4/29

6:20 am-1:25 pm

1 stop15h 05m

$654

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 4/22

11:42 am-2:00 pm

2 stops18h 18m

Sofia

Wed 4/29

7:00 am-8:44 pm

2 stops21h 44m

$661

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 4/26

6:55 pm-6:40 pm

2 stops15h 45m

Sofia

Sun 5/3

6:20 am-1:25 pm

1 stop15h 05m

$690

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Thu 4/23

8:30 am-12:10 pm

2 stops19h 40m

Sofia

Thu 4/30

6:10 am-9:13 pm

2 stops23h 03m

$703
Quickest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 4/22

3:30 pm-1:25 pm

1 stop13h 55m

Sofia

Wed 4/29

6:20 am-1:25 pm

1 stop15h 05m

$704

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Fri 4/10

8:15 pm-10:30 pm

2 stops18h 15m

Sofia

Fri 5/1

6:20 am-1:25 pm

1 stop15h 05m

$716

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Thu 4/23

8:30 am-12:10 pm

2 stops19h 40m

Sofia

Thu 4/30

2:10 pm-1:25 pm

1 stop31h 15m

$719

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Fri 4/10

9:10 am-1:15 pm

2 stops20h 05m

Sofia

Fri 5/1

6:20 am-12:24 am

2 stops26h 04m

$726

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 4/26

4:05 pm-6:40 pm

2 stops18h 35m

Sofia

Sun 5/3

6:20 am-8:25 pm

2 stops22h 05m

$729

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 4/26

4:05 pm-6:40 pm

2 stops18h 35m

Sofia

Sun 5/3

6:20 am-1:25 pm

1 stop15h 05m

$733

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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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

How far in advance should I book a flight 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 $849 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 $730 on momondo.

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

You could potentially save up to 7% 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 45m

Direct flights

None
The fastest flight from St. Louis to Bulgaria takes 15h 45m
There are no direct flights from St. Louis to Bulgaria. There are no popular flight routes from St. Louis to Bulgaria.
Search flight deals

  • 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
9,418 reviews
Search United Airlines flights
LufthansaPriceFrom $603Free CancellationRating
6.8
7,848 reviews
Search Lufthansa 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.

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