Bulgaria

$832+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SOF
Jul 1 — Jul 81
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Cheap 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 June 1, 2026.

This KAYAK deal was found by Cheapflights users on 5/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:28 pm
STL
-
SOF
2 stops15h 42m
Lufthansa
Wed 9/166:20 am
SOF
-
STL
1 stop15h 05m
Lufthansa
Deal found 5/30$832
This United Airlines deal was found by Cheapflights users on 5/29. 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.
Tue 9/112:59 pm
STL
-
SOF
2 stops26h 16m
United Airlines
Fri 9/46:20 am
SOF
-
STL
1 stop15h 05m
United Airlines
Deal found 5/29$838
This Air France deal was found by Cheapflights users on 5/29. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:10 pm
STL
-
SOF
2 stops17h 50m
Multiple Airlines
Wed 9/167:00 am
SOF
-
STL
2 stops24h 20m
Multiple Airlines
Deal found 5/29$844
This United Airlines deal was found by Cheapflights users on 5/29. 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.
Tue 9/112:59 pm
STL
-
SOF
2 stops26h 16m
United Airlines
Thu 9/32:10 pm
SOF
-
STL
2 stops16h 49m
United Airlines
Deal found 5/29$848
This FlightHub deal was found by Cheapflights users on 5/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/163:40 pm
STL
-
SOF
1 stop18h 30m
Lufthansa
Fri 12/252:05 pm
SOF
-
STL
2 stops16h 49m
Lufthansa
Deal found 5/30$849

Find 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 June 1, 2026.

Round-trip from

$832
(KAYAK)

Popular in

June

Cheapest in

January

Average price

$1,209
From Lambert-St Louis to Bulgaria
Highest demand for flights based on searches. 7% potential increase in price ($69 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Average for round-trip flights in June 2026

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 June 1, 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
Quickest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 9/9

12:28 pm-12:10 pm

2 stops15h 42m

Sofia

Wed 9/16

6:20 am-1:25 pm

1 stop15h 05m

$832

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 9/9

8:40 am-12:10 pm

2 stops19h 30m

Sofia

Wed 9/16

6:20 am-1:25 pm

1 stop15h 05m

$838

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 9/1

7:00 am-1:05 pm

3 stops22h 05m

Sofia

Fri 9/4

6:20 am-1:25 pm

1 stop15h 05m

$850

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 8/30

7:00 am-11:15 pm

3 stops32h 15m

Sofia

Fri 9/4

6:20 am-1:25 pm

1 stop15h 05m

$905

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sat 9/26

7:01 pm-12:10 pm

2 stops33h 09m

Sofia

Sat 10/17

6:20 am-9:21 pm

2 stops23h 01m

$968

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Fri 7/3

9:06 am-11:15 pm

2 stops30h 09m

Sofia

Mon 7/6

2:20 pm-2:23 pm

2 stops32h 03m

$1,079
Cheapest one-way
Quickest one-way

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 7/14

6:55 am-8:30 pm

2 stops29h 35m

$941

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 7/14

6:30 am-10:50 pm

3 stops32h 20m

$1,335

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/31

Sorted by cheapest first

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
No data available for this route at this time. Please check back soon.

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 June 1, 2026.
Get a feel of what it's like to fly with United Airlines,Air Canada, andLufthansa 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.

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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 42m. Your travel time can differ by up to 3h 48m. 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.

See more FAQs

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Top 3 airlines flying from St. Louis to Bulgaria

Discover the top 3 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 June 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$559Average$802FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$567Average$834FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$1,108Average$1,209FlexibilityNo cancel feeOn-time67%

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