$468 Cheap Flights from Sofia (SOF) to St. Louis (STL)

View $468 flight on Wed, Apr 29, 2026Opens in a new window

Popular airlines from Sofia Airport (SOF) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Sofia to St. Louis (SOF-STL)

Prices were available within the past 7 days and start at $468 for one-way flights and $760 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, Apr 20 - Mon, Apr 27
SOF
Sofia
STL
St. Louis
$760 Roundtrip, found 5 days ago
$760
Roundtrip
found 5 days ago
Select Air Canada flight, departing Mon, Apr 20 from Sofia to St. Louis, returning Mon, Apr 27, priced at $760 found 5 days ago
Austrian Airlines
Mon, Apr 20 - Mon, Apr 27
SOF
Sofia
STL
St. Louis
$769 Roundtrip, found 5 days ago
$769
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Mon, Apr 20 from Sofia to St. Louis, returning Mon, Apr 27, priced at $769 found 5 days ago
Austrian Airlines
Mon, Apr 20 - Mon, Apr 27
SOF
Sofia
STL
St. Louis
$770 Roundtrip, found 5 days ago
$770
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Mon, Apr 20 from Sofia to St. Louis, returning Mon, Apr 27, priced at $770 found 5 days ago
Lufthansa
Mon, Apr 20 - Mon, Apr 27
SOF
Sofia
STL
St. Louis
$771 Roundtrip, found 5 days ago
$771
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Mon, Apr 20 from Sofia to St. Louis, returning Mon, Apr 27, priced at $771 found 5 days ago
Lufthansa
Mon, Apr 20 - Mon, Apr 27
SOF
Sofia
STL
St. Louis
$772 Roundtrip, found 5 days ago
$772
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Mon, Apr 20 from Sofia to St. Louis, returning Mon, Apr 27, priced at $772 found 5 days ago
Austrian Airlines
Mon, Apr 20 - Mon, Apr 27
SOF
Sofia
STL
St. Louis
$776 Roundtrip, found 5 days ago
$776
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Mon, Apr 20 from Sofia to St. Louis, returning Mon, Apr 27, priced at $776 found 5 days ago
Lufthansa
Mon, Apr 20 - Mon, Apr 27
SOF
Sofia
STL
St. Louis
$778 Roundtrip, found 5 days ago
$778
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Mon, Apr 20 from Sofia to St. Louis, returning Mon, Apr 27, priced at $778 found 5 days ago
Lufthansa
Mon, Apr 20 - Mon, Apr 27
SOF
Sofia
STL
St. Louis
$782 Roundtrip, found 5 days ago
$782
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Mon, Apr 20 from Sofia to St. Louis, returning Mon, Apr 27, priced at $782 found 5 days ago
Turkish Airlines
Mon, Apr 20 - Mon, Apr 27
SOF
Sofia
STL
St. Louis
$1,337 Roundtrip, found 5 days ago
$1,337
Roundtrip
found 5 days ago
Select Turkish Airlines flight, departing Mon, Apr 20 from Sofia to St. Louis, returning Mon, Apr 27, priced at $1,337 found 5 days ago
Qatar Airways
Mon, Apr 20 - Mon, Apr 27
SOF
Sofia
STL
St. Louis
$1,439 Roundtrip, found 5 days ago
$1,439
Roundtrip
found 5 days ago
Select Qatar Airways flight, departing Mon, Apr 20 from Sofia to St. Louis, returning Mon, Apr 27, priced at $1,439 found 5 days ago

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Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $893
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $893

Frequently asked questions

How much does a flight from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find cheap one-way flights from $468 and cheap return flights from $760 Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.) with Expedia. One-way flights typically cost between $786 and $3584. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The cheapest month to fly from SOF to STL is April when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Enter SOF to STL and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Lufthansa, Bulgaria Air and British Airways are just some of the carriers that fly from Sofia (SOF) to St. Louis, MO (STL). Use Expedia's flight search tool to compare airlines on this route and find our cheapest option for your trip. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from SOF to STL. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Sofia (SOF) to Lambert-St. Louis International Airport (STL) are in the early morning, from 6am to 9am. About 66% of passengers prefer this time window. Many major carriers, including Lufthansa, United Airlines, and Bulgaria Air, offer flights during this window. This timing is favored because it allows travelers to maximize their time upon arrival in St. Louis.
How long does it take to fly from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Flying from SOF to STL with a connection usually takes about 15 hours 50 minutes, traveling roughly 5,449 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Business class is available on flights from SOF to STL. Airlines that offer business class service on this route include:

  • British Airways
  • Lufthansa
  • Austrian Airlines
  • Bulgaria Air
  • Turkish Airlines
  • Qatar Airways

How do I earn miles on a Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia?
It's easy to earn miles on a Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Louis from SOF (SOF)?
If you're planning to travel to St. Louis from SOF (SOF), you can fly into Lambert-St. Louis Intl. (STL) Some flights may connect through major hubs like Frankfurt Intl. (FRA), Franz Josef Strauss Intl. (MUC), Schiphol (AMS) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.) St Louis Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Sofia (SOF) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Sofia
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Air Canada, Austrian Airlines, Lufthansa, Qatar Airways, Turkish Airlines
Roundtrip price
$760
Distance
5448 mi

Book with confidence

Sofia to St. Louis Flights

The cheapest times to fly from Sofia to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Sofia to St. Louis are during the month of April. You can find some of the cheapest flights from Sofia to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sofia to St. Louis

Sunday is one of the best days to book for cheap flights from Sofia to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Sofia to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Sofia to St. Louis in 2026. You can also book with separate airlines for your outbound and return journeys, from $468 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Sofia to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Sofia to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Sofia to St. Louis Flights

*Flight schedules are subject to change.

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*Available to One Key members.