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Cheap flights from St. Louis to Bulgaria from $550

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 10/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Air Canada Logo
4:05 pm - 6:20 pmSTL-SOF
19h 15m2 stops
Air Canada Logo
2:15 pm - 3:29 pmSOF-STL
33h 14m2 stops
$550Air Canada
Find Deal
Sun, Oct 26 - Tue, Nov 11
Logo
4:50 pm - 6:00 pmSTL-SOF
18h 10m1 stop
Logo
6:00 am - 3:29 pmSOF-STL
41h 29m2 stops
$565
Find Deal
Sun, Oct 26 - Tue, Nov 11
Lufthansa Logo
12:25 pm - 12:00 pmSTL-SOF
15h 35m2 stops
Lufthansa Logo
6:10 am - 1:55 pmSOF-STL
15h 45m1 stop
$569Lufthansa
Find Deal
Wed, Oct 15 - Fri, Nov 14
Lufthansa Logo
12:25 pm - 12:00 pmSTL-SOF
15h 35m2 stops
Lufthansa Logo
6:10 am - 9:40 pmSOF-STL
23h 30m2 stops
$579Lufthansa
Find Deal
Wed, Oct 15 - Fri, Nov 14
Lufthansa Logo
4:50 pm - 1:35 pmSTL-SOF
13h 45m1 stop
Lufthansa Logo
2:15 pm - 1:55 pmSOF-STL
31h 40m1 stop
$584Lufthansa
Find Deal
Sun, Oct 26 - Tue, Nov 11
Lufthansa Logo
3:30 pm - 1:15 pmSTL-SOF
13h 45m1 stop
Lufthansa Logo
6:10 am - 1:55 pmSOF-STL
15h 45m1 stop
$620Lufthansa
Find Deal
Wed, Oct 15 - Fri, Nov 14
United Airlines Logo
8:20 am - 11:00 pmSTL-SOF
30h 40m2 stops
United Airlines Logo
7:55 am - 10:58 pmSOF-STL
23h 03m2 stops
$686United Airlines
Find Deal
Wed, Sep 24 - Wed, Jan 7
Lufthansa Logo
3:30 pm - 5:50 pmSTL-SOF
18h 20m1 stop
Lufthansa Logo
6:10 am - 1:55 pmSOF-STL
15h 45m1 stop
$741Lufthansa
Find Deal
Wed, Sep 24 - Wed, Jan 7
Logo
3:30 pm - 5:50 pmSTL-SOF
18h 20m1 stop
Logo
7:55 am - 10:58 pmSOF-STL
23h 03m2 stops
$835
Find Deal
Wed, Sep 24 - Wed, Jan 7
Air Canada Logo
1:30 pm - 1:15 pmSTL-SOF
15h 45m2 stops
Air Canada Logo
6:10 am - 9:40 pmSOF-STL
23h 30m3 stops
$937Air Canada
Find Deal
Wed, Oct 15 - Fri, Nov 14

Lufthansa flights from St. Louis to Bulgaria

Our best Lufthansa deals on St. Louis to Bulgaria flight tickets
Lufthansa
Oct 15
STL12:25 pmLambert-St Louis
15h 35m
2 stops
SOF12:00 pmSofia
Nov 14
SOF6:10 amSofia
15h 45m
1 stop
STL1:55 pmLambert-St Louis
$569
Find similar
Lufthansa
Oct 15
STL12:25 pmLambert-St Louis
15h 35m
2 stops
SOF12:00 pmSofia
Nov 14
SOF6:10 amSofia
23h 30m
2 stops
STL9:40 pmLambert-St Louis
$579
Find similar
Lufthansa
Oct 26
STL4:50 pmLambert-St Louis
13h 45m
1 stop
SOF1:35 pmSofia
Nov 11
SOF2:15 pmSofia
31h 40m
1 stop
STL1:55 pmLambert-St Louis
$584
Find similar

Air Canada flights from St. Louis to Bulgaria

Our best Air Canada deals on St. Louis to Bulgaria flight tickets
Air Canada
Oct 26
STL4:05 pmLambert-St Louis
19h 15m
2 stops
SOF6:20 pmSofia
Nov 11
SOF2:15 pmSofia
33h 14m
2 stops
STL3:29 pmLambert-St Louis
$550
Find similar
Air Canada
Oct 15
STL1:30 pmLambert-St Louis
15h 45m
2 stops
SOF1:15 pmSofia
Nov 14
SOF6:10 amSofia
23h 30m
3 stops
STL9:40 pmLambert-St Louis
$937
Find similar
Air Canada
Sep 24
STL1:30 pmLambert-St Louis
20h 20m
2 stops
SOF5:50 pmSofia
Jan 7
SOF6:10 amSofia
21h 17m
3 stops
STL7:27 pmLambert-St Louis
$1,272
Find similar

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 September 11, 2025.
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

Sun 10/26

4:05 pm-6:20 pm

2 stops19h 15m

Sofia

Tue 11/11

2:15 pm-3:29 pm

2 stops33h 14m

$550

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 10/26

4:50 pm-6:00 pm

1 stop18h 10m

Sofia

Tue 11/11

6:00 am-3:29 pm

2 stops41h 29m

$565

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 10/15

12:25 pm-12:00 pm

2 stops15h 35m

Sofia

Fri 11/14

6:10 am-1:55 pm

1 stop15h 45m

$569

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 10/15

12:25 pm-12:00 pm

2 stops15h 35m

Sofia

Fri 11/14

6:10 am-9:40 pm

2 stops23h 30m

$579

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 10/26

4:50 pm-1:35 pm

1 stop13h 45m

Sofia

Tue 11/11

2:15 pm-1:55 pm

1 stop31h 40m

$584

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 10/15

3:30 pm-1:15 pm

1 stop13h 45m

Sofia

Fri 11/14

6:10 am-1:55 pm

1 stop15h 45m

$620

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 9/24

8:20 am-11:00 pm

2 stops30h 40m

Sofia

Wed 1/7

7:55 am-10:58 pm

2 stops23h 03m

$686

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 9/24

3:30 pm-5:50 pm

1 stop18h 20m

Sofia

Wed 1/7

6:10 am-1:55 pm

1 stop15h 45m

$741

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 9/24

3:30 pm-5:50 pm

1 stop18h 20m

Sofia

Wed 1/7

7:55 am-10:58 pm

2 stops23h 03m

$835

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 10/15

1:30 pm-1:15 pm

2 stops15h 45m

Sofia

Fri 11/14

6:10 am-9:40 pm

3 stops23h 30m

$937

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 February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $751.

What is the cheapest day to depart on your flight to Bulgaria?

The cheapest day to depart from St. Louis to Bulgaria is on a Saturday when prices can be found for as low as $1,095. On the other hand, Friday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,306.

What is the cheapest time of day to depart on your flight to Bulgaria?

In the morning is the cheapest time of day to fly from St. Louis to Bulgaria when you can find flight prices for as low as $1,199. Flying to Bulgaria in the morning is an ideal time because this is during off-peak travel hours. Flights to Bulgaria are more costly in the afternoon, with an average ticket price of $1,335. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $978 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 $799 on momondo.

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

Direct flights

None
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
LufthansaPriceFrom $669Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
United AirlinesPriceFrom $711Free CancellationRating
7.4
8,937 reviews
Search United Airlines 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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