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Cheap flights from St. Louis to Bulgaria from $546

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 2/26. 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
9:55 am - 10:45 pm
STL
-
SOF
28h 50m
2 stops
United Airlines Logo
2:20 pm - 11:59 pm
SOF
-
STL
17h 39m
2 stops
$546United Airlines
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
6:55 pm - 6:20 pm
STL
-
SOF
15h 25m
2 stops
Multiple Airlines Logo
6:15 pm - 10:51 pm
SOF
-
STL
36h 36m
2 stops
$595Multiple Airlines
Sun, Mar 1 - Sat, Mar 7
Lufthansa Logo
6:55 pm - 10:45 pm
STL
-
SOF
19h 50m
2 stops
Lufthansa Logo
2:25 pm - 1:55 pm
SOF
-
STL
31h 30m
1 stop
$600Lufthansa
Sun, Mar 1 - Sat, Mar 7
United Airlines Logo
2:45 pm - 10:45 pm
STL
-
SOF
24h 00m
2 stops
United Airlines Logo
1:45 pm - 8:23 pm
SOF
-
STL
38h 38m
2 stops
$609United Airlines
Thu, Feb 26 - Mon, Mar 2
Lufthansa Logo
3:50 pm - 1:35 pm
STL
-
SOF
13h 45m
1 stop
Lufthansa Logo
2:25 pm - 1:55 pm
SOF
-
STL
31h 30m
1 stop
$614Lufthansa
Sun, Mar 1 - Sat, Mar 7
Lufthansa Logo
8:25 am - 11:10 pm
STL
-
SOF
30h 45m
2 stops
Lufthansa Logo
6:10 am - 1:25 pm
SOF
-
STL
15h 15m
1 stop
$1,019Lufthansa
Wed, Jul 1 - Tue, Aug 4
Lufthansa Logo
8:25 am - 11:10 pm
STL
-
SOF
30h 45m
2 stops
Lufthansa Logo
6:10 am - 1:25 pm
SOF
-
STL
15h 15m
2 stops
$1,043Lufthansa
Wed, Jul 1 - Tue, Aug 4
Lufthansa Logo
3:30 pm - 1:25 pm
STL
-
SOF
13h 55m
1 stop
Lufthansa Logo
6:10 am - 1:25 pm
SOF
-
STL
15h 15m
1 stop
$1,189Lufthansa
Wed, Jul 1 - Tue, Aug 4
Multiple Airlines Logo
4:05 pm - 1:25 pm
STL
-
SOF
37h 20m
2 stops
Multiple Airlines Logo
6:25 am - 7:14 pm
SOF
-
STL
20h 49m
3 stops
$1,399Multiple Airlines
Sun, Mar 1 - Sat, Mar 7
Air Canada Logo
11:25 am - 6:20 pm
STL
-
SOF
22h 55m
3 stops
Air Canada Logo
6:25 am - 5:44 pm
SOF
-
STL
19h 19m
3 stops
$2,117Air Canada
Sun, Mar 1 - Sat, Mar 7

United Airlines flights from St. Louis to Bulgaria

Our best United Airlines deals on St. Louis to Bulgaria flight tickets
United Airlines
Feb 26
STL9:55 amLambert-St Louis
28h 50m
2 stops
SOF10:45 pmSofia
Mar 2
SOF2:20 pmSofia
17h 39m
2 stops
STL11:59 pmLambert-St Louis
$546
United Airlines
Feb 26
STL2:45 pmLambert-St Louis
24h 00m
2 stops
SOF10:45 pmSofia
Mar 2
SOF1:45 pmSofia
38h 38m
2 stops
STL8:23 pmLambert-St Louis
$609

Lufthansa flights from St. Louis to Bulgaria

Our best Lufthansa deals on St. Louis to Bulgaria flight tickets
Lufthansa
Mar 1
STL6:55 pmLambert-St Louis
19h 50m
2 stops
SOF10:45 pmSofia
Mar 7
SOF2:25 pmSofia
31h 30m
1 stop
STL1:55 pmLambert-St Louis
$600
Lufthansa
Mar 1
STL3:50 pmLambert-St Louis
13h 45m
1 stop
SOF1:35 pmSofia
Mar 7
SOF2:25 pmSofia
31h 30m
1 stop
STL1:55 pmLambert-St Louis
$614
Lufthansa
Jul 1
STL8:25 amLambert-St Louis
30h 45m
2 stops
SOF11:10 pmSofia
Aug 4
SOF6:10 amSofia
15h 15m
1 stop
STL1:25 pmLambert-St Louis
$1,019

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 January 27, 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

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Thu 2/26

9:55 am-10:45 pm

2 stops28h 50m

Sofia

Mon 3/2

2:20 pm-11:59 pm

2 stops17h 39m

$546

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 3/1

6:55 pm-6:20 pm

2 stops15h 25m

Sofia

Sat 3/7

6:15 pm-10:51 pm

2 stops36h 36m

$595

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 3/1

6:55 pm-10:45 pm

2 stops19h 50m

Sofia

Sat 3/7

2:25 pm-1:55 pm

1 stop31h 30m

$600

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Thu 2/26

2:45 pm-10:45 pm

2 stops24h 00m

Sofia

Mon 3/2

1:45 pm-8:23 pm

2 stops38h 38m

$609

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 3/1

3:50 pm-1:35 pm

1 stop13h 45m

Sofia

Sat 3/7

2:25 pm-1:55 pm

1 stop31h 30m

$614

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 7/1

8:25 am-11:10 pm

2 stops30h 45m

Sofia

Tue 8/4

6:10 am-1:25 pm

1 stop15h 15m

$1,019

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 7/1

8:25 am-11:10 pm

2 stops30h 45m

Sofia

Tue 8/4

6:10 am-1:25 pm

2 stops15h 15m

$1,043

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 7/1

3:30 pm-1:25 pm

1 stop13h 55m

Sofia

Tue 8/4

6:10 am-1:25 pm

1 stop15h 15m

$1,189

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 3/1

4:05 pm-1:25 pm

2 stops37h 20m

Sofia

Sat 3/7

6:25 am-7:14 pm

3 stops20h 49m

$1,399

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 3/1

11:25 am-6:20 pm

3 stops22h 55m

Sofia

Sat 3/7

6:25 am-5:44 pm

3 stops19h 19m

$2,117

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

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 $880 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 $791 on momondo.

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

You could potentially save up to 17% 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 25m

Direct flights

None
The fastest flight from St. Louis to Bulgaria takes 15h 25m
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
9,205 reviews
Search United Airlines flights
LufthansaPriceFrom $614Free CancellationRating
6.8
7,749 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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