$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
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Bulgaria
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Best
Last-minute
One-way
Cheapest flights from St. Louis to BulgariaExplore 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.
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![Lufthansa logo]()
$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![United Airlines logo]()
$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![Multiple Airlines logo]()
$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![United Airlines logo]()
$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![Lufthansa logo]()
$849
Best flights from St. Louis to BulgariaDiscover carefully curated flight deals from St. Louis to Bulgaria that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 1, 2026.
Discover carefully curated flight deals from St. Louis to Bulgaria that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 1, 2026.
This KAYAK deal was found by Cheapflights users on 6/1. 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 6/1![Lufthansa logo]()
$832
This United Airlines deal was found by Cheapflights users on 5/28. 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.
Wed 9/98:40 am
STL
- SOF
2 stops19h 30m
United Airlines
Wed 9/166:20 am
SOF
- STL
1 stop15h 05m
United Airlines
Deal found 5/28![United Airlines logo]()
$838
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 9/17:00 am
STL
- SOF
3 stops22h 05m
United Airlines
Fri 9/46:20 am
SOF
- STL
1 stop15h 05m
United Airlines
Deal found 5/29![United Airlines logo]()
$850
This Justfly.com deal was found by Cheapflights users on 6/1. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:01 pm
STL
- SOF
2 stops33h 09m
Lufthansa
Sat 10/176:20 am
SOF
- STL
2 stops23h 01m
Lufthansa
Deal found 6/1![Lufthansa logo]()
$968
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.
Sun 8/307:00 am
STL
- SOF
3 stops32h 15m
United Airlines
Fri 9/46:20 am
SOF
- STL
1 stop15h 05m
United Airlines
Deal found 5/29![United Airlines logo]()
$905
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.
Fri 7/39:06 am
STL
- SOF
2 stops30h 09m
United Airlines
Mon 7/62:20 pm
SOF
- STL
2 stops32h 03m
United Airlines
Deal found 5/29![United Airlines logo]()
$1,079
Last-minute flights from St. Louis to BulgariaDiscover last-minute flight deals from St. Louis to Bulgaria. Data last updated June 1, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Bulgaria. Data last updated June 1, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sun 6/285:10 am
STL
- SOF
2 stops34h 05m
United Airlines
Wed 8/121:50 pm
SOF
- STL
2 stops33h 48m
United Airlines
Deal found 5/27![United Airlines logo]()
$1,118
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Mon 6/298:00 am
STL
- SOF
2 stops31h 15m
United Airlines
Tue 8/1812:55 pm
SOF
- STL
2 stops42h 43m
United Airlines
Deal found 5/27![United Airlines logo]()
$1,080
This Expedia deal was found by Cheapflights users on 5/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/2912:55 pm
STL
- SOF
2 stops21h 45m
Multiple Airlines
Wed 8/127:00 pm
SOF
- STL
2 stops33h 07m
Multiple Airlines
Deal found 5/27![Multiple Airlines logo]()
$1,116
This British Airways deal was found by Cheapflights users on 5/27. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/297:51 pm
STL
- SOF
2 stops40h 39m
British Airways
Mon 8/178:10 pm
SOF
- STL
2 stops32h 16m
British Airways
Deal found 5/27![British Airways logo]()
$1,130
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.
Fri 7/31:38 pm
STL
- SOF
2 stops25h 37m
United Airlines
Tue 7/76:10 am
SOF
- STL
1 stop15h 15m
United Airlines
Deal found 5/29![United Airlines logo]()
$1,049
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.
Fri 7/31:38 pm
STL
- SOF
2 stops25h 37m
United Airlines
Thu 7/96:30 am
SOF
- STL
2 stops20h 12m
United Airlines
Deal found 5/29![United Airlines logo]()
$1,052
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.
Fri 7/34:48 pm
STL
- SOF
2 stops22h 27m
United Airlines
Mon 7/62:20 pm
SOF
- STL
1 stop31h 05m
United Airlines
Deal found 5/29![United Airlines logo]()
$1,069
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sat 7/1112:55 pm
STL
- SOF
2 stops15h 15m
United Airlines
Sat 7/186:10 am
SOF
- STL
2 stops17h 36m
United Airlines
Deal found 5/27![United Airlines logo]()
$1,110
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:05 pm
STL
- SOF
2 stops15h 35m
Multiple Airlines
Thu 8/66:55 pm
SOF
- STL
2 stops36h 49m
Multiple Airlines
Deal found 5/29![Multiple Airlines logo]()
$986
One-way flights from St. Louis to BulgariaSearch for one-way flight options from St. Louis to Bulgaria. Find affordable one-way fares based on user searches. Data last updated June 1, 2026.
Search for one-way flight options from St. Louis to Bulgaria. Find affordable one-way fares based on user searches. Data last updated June 1, 2026.
This AranGrant deal was found by Cheapflights users on 5/31. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:55 am
STL
- SOF
2 stops29h 35m
British Airways
Deal found 5/31![British Airways logo]()
$941
This Kiwi.com deal was found by Cheapflights users on 5/31. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:30 am
STL
- SOF
3 stops32h 20m
Multiple Airlines
Deal found 5/31![Multiple Airlines logo]()
$1,335
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 |
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
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
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.
STL-SOF
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
STL-BG0
STL-SOF
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
OkayDynasty,May 2026
LAX - EWR
Entertainment
7.1
Boarding
7.7
Overall
7.4
Crew
8.1
Food
6.6
Comfort
7.3
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Entertainment
7.1
Boarding
7.7
Overall
7.4
Crew
8.1
Food
6.6
Comfort
7.3
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Entertainment
7.1
Boarding
7.7
Overall
7.4
Crew
8.1
Food
6.6
Comfort
7.3
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
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.
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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.
Complete your trip
Complete your trip to Bulgaria by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Bulgaria by cabin class
Find flights from St. Louis to Bulgaria, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Bulgaria flights
Browse other St. Louis and Bulgaria flight options. Last updated on June 1, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Fly to Bulgaria regions
Consider these flights traveling to Bulgaria regions.
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.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$559 | Average$802 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$567 | Average$834 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$1,108 | Average$1,209 | FlexibilityNo cancel fee | On-time67% |