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St. Louis

Cheap flights from Sofia (SOF) to St. Louis (STL)

SOF — STL
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
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Cheap flight deals from Sofia to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars
Provider with most accurate pricing for Sofia-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Sofia-Lambert-St Louis flights.
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Compare providers for flights from Sofia to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sofia to St. Louis in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sofia-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sofia-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sofia-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sofia-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sofia-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Sofia to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Sofia 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 Sofia to St. Louis

What is the cheapest time of day to fly from SOF to STL?

Find hourly flight availability from Sofia to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 20, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 27% on flights from Sofia to St. Louis by exploring options for tickets in the evening.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated October 20, 2025.
Read reviews from past customers who have flown United Airlines and Lufthansa from Sofia to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,991 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
8,991 reviews
United Airlines
7.4
Good
8,991 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Lufthansa
6.8
Okay
7,508 reviews
United Airlines
7.4
Good
8,991 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

Related info for your journey

Find useful and relevant information for your journey from Sofia to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Sofia to St. Louis round-trip?

    Lufthansa, at $622, was found to be the cheapest airline from Sofia to St. Louis. An alternate airline flying to your destination would be United Airlines.

  • Can I find deals for flights from Sofia to St. Louis that include hotel bookings?

    Yes. In addition to deals on Sofia to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sofia to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sofia to St. Louis.

  • Can I find deals for business class flights from Sofia to St. Louis?

    Yes. Cheapflights offers flight deals from Sofia to St. Louis 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
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Top 2 airlines flying from Sofia to St. Louis

Discover the top 2 airlines that operate flights from Sofia to St. Louis. 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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$622Average$789FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$642Average$937FlexibilityNo cancel feeOn-time69%

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