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Bulgaria

$693+ 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SOF
apr. 5 — apr. 121
lør. 4/5
lør. 4/12
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 marts 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$845
(Gotogate)

Popular in

June

Cheapest in

February

Average price

$779
Provider with most accurate pricing for Lambert-St Louis-Sofia flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Sofia flights.
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From Lambert-St Louis to Bulgaria
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($276 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in March 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 marts 31, 2025.

This Travelocity deal was found by Cheapflights users on 3/31. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 10/294:45 pmSTL - SOF
1 stop22h 40mMultiple Airlines
lør. 11/86:00 amSOF - STL
2 stops17h 26mMultiple Airlines
Deal found 3/31$693
This United Airlines deal was found by Cheapflights users on 3/31. 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.
ons. 10/291:30 pmSTL - SOF
2 stops21h 40mUnited Airlines
lør. 11/86:00 amSOF - STL
2 stops17h 26mUnited Airlines
Deal found 3/31$696
This Orbitz deal was found by Cheapflights users on 3/31. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 10/294:45 pmSTL - SOF
1 stop13h 50mLufthansa
lør. 11/86:40 pmSOF - STL
1 stop27h 15mLufthansa
Deal found 3/31$718
This Air Canada deal was found by Cheapflights users on 3/31. 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.
ons. 10/294:15 pmSTL - SOF
2 stops18h 35mAir Canada
lør. 11/86:00 amSOF - STL
3 stops21h 25mAir Canada
Deal found 3/31$748
This FlightHub deal was found by Cheapflights users on 3/30. 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.
lør. 8/28:01 pmSTL - SOF
2 stops39h 09mBritish Airways
søn. 8/109:10 pmSOF - STL
2 stops29h 58mBritish Airways
Deal found 3/30$1,157

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 marts 31, 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

ons. 5/7

1:30 pm-11:40 am

2 stops14h 10m

Sofia

lør. 5/17

6:15 am-7:58 pm

2 stops21h 43m

$845

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

søn. 4/27

3:30 pm-1:05 pm

1 stop13h 35m

Sofia

søn. 5/4

6:20 am-1:30 pm

1 stop15h 10m

$880

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

tor. 5/8

1:30 pm-6:35 pm

2 stops21h 05m

Sofia

søn. 5/18

6:20 am-7:58 pm

2 stops21h 38m

$925

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

lør. 8/2

8:01 pm-7:10 pm

2 stops39h 09m

Sofia

søn. 8/10

9:10 pm-7:08 pm

2 stops29h 58m

$1,157

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

ons. 5/7

3:30 pm-1:15 pm

1 stop13h 45m

Sofia

lør. 5/17

2:05 pm-1:30 pm

1 stop31h 25m

$1,219

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

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 $1,243). 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.

Rainfall in Bulgaria by month

Plan your trip to Bulgaria by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Bulgaria ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Bulgaria when rainfall is around 1.2 in.

Temperature in Bulgaria by month

Plan your trip to Bulgaria by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Bulgaria, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 marts 31, 2025.
United Airlines
7.4
Good
8,614 reviews

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.0

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
8,614 reviews
United Airlines
7.4
Good
8,614 reviews

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.0

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??
Air Canada
7.0
Good
9,004 reviews
United Airlines
7.4
Good
8,614 reviews

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.0

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
6.7
Okay
6,960 reviews
United Airlines
7.4
Good
8,614 reviews

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.0

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??
British Airways
6.6
Okay
6,713 reviews
United Airlines
7.4
Good
8,614 reviews

Boarding

7.7

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.0

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.

  • 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 $1,243). 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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Alternative routes for St. Louis to Bulgaria

See prices for flight routes from nearby airports that may be better suited for you.
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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 marts 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$711Average$1,095FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$757Average$1,102FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$972Average$1,085FlexibilityNo cancel feeOn-time67%
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