$450+ Cheap flights from St. Louis (STL) to Bulgaria
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SOF
Aug 4 — Aug 111
1 adult, Economy
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Find cheap flights from St. Louis to Bulgaria with Cheapflights
1. Tell us where you want to go
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
Keep the following information in mind while searching for St. Louis to Bulgaria flight deals. Data was last updated July 30, 2025.
Popular in | June |
|---|---|
Cheapest in | February |
Average price | $925 |
Find flight deals from St. Louis to Bulgaria
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 July 30, 2025.
Search for one-way flight options from St. Louis to Bulgaria. Find affordable one-way fares based on user searches. Data last updated July 30, 2025.
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/157:29 pmSTL - SOF
3 stops53h 31mMultiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$450
This Ovago deal was found by Cheapflights users on 7/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/153:30 pmSTL - SOF
1 stop23h 20mLufthansa
Deal found 7/29![Lufthansa logo]()
$567
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 July 30, 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
Fri 8/15
7:29 pm-9:00 am
3 stops53h 31m
$450
St. LouisSofia
STL - SOF
STLSOF
Lambert-St Louis
Fri 8/15
3:30 pm-10:50 pm
1 stop23h 20m
$567
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 $1,187). 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 July 30, 2025.
Get a feel of what it's like to fly with 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.
Food
6.3
Comfort
6.8
Boarding
7.0
Overall
6.8
Entertainment
6.4
Crew
7.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Dec 2024
SFO - FRA
Food
6.3
Comfort
6.8
Boarding
7.0
Overall
6.8
Entertainment
6.4
Crew
7.6
Reviews
1 / 20
8.0
ExcellentAnonymous,Dec 2024
SFO - FRA
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.
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 July 30, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$706 | Average$1,016 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$711 | Average$936 | FlexibilityNo cancel fee | On-time69% |