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Bulgaria

$550+ Cheap flights from St. Louis (STL) to Bulgaria

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SOF
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap flight deals from St. Louis to Bulgaria

Keep the following information in mind while searching for St. Louis to Bulgaria flight deals. Data was last updated septiembre 11, 2025.

Round-trip from

$550
(Gotogate)

Popular in

June

Cheapest in

February

Average price

$829
From Lambert-St Louis to Bulgaria
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($180 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from St. Louis to Bulgaria

Cheapest flights from St. Louis to Bulgaria
Explore the most affordable flight options available from St. Louis to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This Gotogate deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/264:05 pmSTL - SOF
2 stops19h 15mAir Canada
mar. 11/112:15 pmSOF - STL
2 stops33h 14mAir Canada
Deal found 9/11$550
This Gotogate deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/264:50 pmSTL - SOF
1 stop18h 10mMultiple Airlines
mar. 11/116:00 amSOF - STL
2 stops41h 29mMultiple Airlines
Deal found 9/11$565
This Cheapflightsfares deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/1512:25 pmSTL - SOF
2 stops15h 35mLufthansa
vie. 11/146:10 amSOF - STL
1 stop15h 45mLufthansa
Deal found 9/10$569
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/193:30 pmSTL - SOF
1 stop13h 30mLufthansa
mié. 10/296:10 amSOF - STL
1 stop15h 45mLufthansa
Deal found 9/11$576
This Gotogate deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/264:50 pmSTL - SOF
1 stop13h 45mLufthansa
mar. 11/112:15 pmSOF - STL
1 stop31h 40mLufthansa
Deal found 9/11$584
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/223:30 pmSTL - SOF
1 stop13h 45mLufthansa
vie. 10/316:10 amSOF - STL
1 stop15h 45mLufthansa
Deal found 9/11$591
This Trip.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/199:15 amSTL - SOF
2 stops18h 45mAir Canada
mié. 10/296:10 amSOF - STL
2 stops40h 19mAir Canada
Deal found 9/11$617
This United deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/1912:25 pmSTL - SOF
2 stops14h 50mMultiple Airlines
mié. 10/296:10 amSOF - STL
1 stop15h 45mMultiple Airlines
Deal found 9/11$619
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/205:28 pmSTL - SOF
2 stops21h 32mUnited Airlines
jue. 10/306:00 amSOF - STL
2 stops35h 51mUnited Airlines
Deal found 9/11$620
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/223:30 pmSTL - SOF
1 stop18h 20mUnited Airlines
vie. 10/312:35 pmSOF - STL
2 stops27h 16mUnited Airlines
Deal found 9/11$624
This Air Canada deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/184:05 pmSTL - SOF
2 stops35h 10mAir Canada
vie. 10/316:10 amSOF - STL
2 stops40h 19mAir Canada
Deal found 9/11$632

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
Use the filters below to find and compare flights from St. Louis to Bulgaria that are best for you.

Fly from

St. Louis

Fly to

Bulgaria

Route

Depart

Return

Price

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

dom. 10/26

4:05 pm-6:20 pm

2 stops19h 15m

Sofia

mar. 11/11

2:15 pm-3:29 pm

2 stops33h 14m

$550

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

dom. 10/26

4:50 pm-6:00 pm

1 stop18h 10m

Sofia

mar. 11/11

6:00 am-3:29 pm

2 stops41h 29m

$565

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

mié. 10/15

12:25 pm-12:00 pm

2 stops15h 35m

Sofia

vie. 11/14

6:10 am-1:55 pm

1 stop15h 45m

$569

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

dom. 10/19

12:25 pm-11:15 am

2 stops14h 50m

Sofia

mié. 10/29

6:10 am-2:55 pm

1 stop15h 45m

$619

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

mar. 10/21

12:25 pm-11:00 pm

2 stops26h 35m

Sofia

vie. 10/31

2:35 pm-10:51 am

2 stops27h 16m

$620

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

mié. 10/22

12:25 pm-12:00 pm

2 stops15h 35m

Sofia

vie. 10/31

2:35 pm-2:25 pm

2 stops30h 50m

$620

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

lun. 10/20

3:23 pm-11:00 pm

2 stops23h 37m

Sofia

mié. 10/29

6:10 am-9:54 pm

2 stops22h 44m

$620

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

mar. 10/21

12:25 pm-12:00 pm

2 stops15h 35m

Sofia

jue. 10/30

6:00 am-9:54 pm

2 stops22h 54m

$620

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

mié. 10/22

3:30 pm-5:50 pm

1 stop18h 20m

Sofia

jue. 10/30

6:00 am-5:39 pm

2 stops18h 39m

$624

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

dom. 10/19

9:20 am-11:15 am

2 stops17h 55m

Sofia

jue. 10/30

6:00 am-9:54 pm

2 stops22h 54m

$624

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Best time to book a flight from St. Louis to Bulgaria

Have a flexible travel schedule? Discover the best time to fly to Bulgaria from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Bulgaria

What is the cheapest month to book a flight from St. Louis to Bulgaria?

Currently, November is the cheapest month in which you can book a flight from St. Louis to Bulgaria (average of $632). Flying from St. Louis to Bulgaria in June is currently the most expensive (average of $1,185). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Bulgaria

Get insights into the airlines that provide service to Bulgaria. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bulgaria. Reviews last updated septiembre 11, 2025.
Get a feel of what it's like to fly with United Airlines and Lufthansa from St. Louis to Bulgaria by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,409 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Bulgaria. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Bulgaria?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Bulgaria from St. Louis.

  • How long is the flight from St. Louis to Bulgaria?

    Lufthansa and United Airlines can get you from St. Louis to Bulgaria in just under 15h 35m. Your travel time can differ by up to 11h. Airlines will cover a distance of 5444 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from St. Louis to Bulgaria that include hotel bookings?

    Yes. In addition to deals on St. Louis to Bulgaria flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Bulgaria?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Bulgaria.

  • Can I find deals for business class flights from St. Louis to Bulgaria?

    Yes. Cheapflights offers flight deals from St. Louis to Bulgaria by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Bulgaria?

    Currently, November is the cheapest month in which you can book a flight from St. Louis to Bulgaria (average of $632). Flying from St. Louis to Bulgaria in June is currently the most expensive (average of $1,185). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from St. Louis to Bulgaria

Discover the top 2 airlines that operate flights from St. Louis to Bulgaria. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$669Average$971FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$711Average$884FlexibilityNo cancel feeOn-time69%

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