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

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The best prices from Lambert-St Louis to Sofia are usually found in January or February, booked 51 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

How to find the cheapest flight from
St. Louis (STL) to Sofia (SOF)

All the information you need to plan the best STL to SOF flight in 2022: compare St. Louis to Sofia flight prices with the expected peak season, weather and rainfall in Sofia.
When is the cheapest time to fly from St. Louis to Sofia (STL - SOF)?

When flying from St. Louis to Sofia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 98% versus a flight in the afternoon.

How far in advance should I book a flight from St. Louis to Sofia?

To save on the cost of your flight from St. Louis to Sofia, book at least 51 days before your planned departure. Booking around this time can save you about 73% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $1,095 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $1,578.

What is the cheapest day to fly round-trip from St. Louis to Sofia?

It’s generally more expensive to depart on a Wednesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

Cheap flights from St. Louis to Sofia in June, July 2022

The best prices found for STL to SOF flights for June, July
16 Jul - 10 Sep
$1,327pp
STL
Lambert-St Louis
British Airways
   
2 STOPS
SOF
Sofia
SOF
Sofia
British Airways
   
2 STOPS
STL
Lambert-St Louis
13 Jul - 13 Sep
$1,377pp
STL
Lambert-St Louis
British Airways
   
2 STOPS
SOF
Sofia
SOF
Sofia
British Airways
   
2 STOPS
STL
Lambert-St Louis
13 Jul - 9 Sep
$1,444pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
SOF
Sofia
SOF
Sofia
Lufthansa
 
1 STOP
STL
Lambert-St Louis

Lambert-St Louis to Sofia 2022 flight deals

Cheap flights to Sofia from St. Louis found for this year
3 Oct - 8 Oct
$1,143pp
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
SOF
Sofia
SOF
Sofia
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
16 Jul - 10 Sep
$1,327pp
STL
Lambert-St Louis
British Airways
   
2 STOPS
SOF
Sofia
SOF
Sofia
British Airways
   
2 STOPS
STL
Lambert-St Louis
13 Jul - 13 Sep
$1,377pp
STL
Lambert-St Louis
British Airways
   
2 STOPS
SOF
Sofia
SOF
Sofia
British Airways
   
2 STOPS
STL
Lambert-St Louis

Related info for your journey

Useful info, stats and facts about <span class="emphasized">St. Louis</span> to <span class="emphasized">Sofia</span> flights.

Flight FAQs

From St. Louis to Sofia

Which airlines flying from Lambert-St Louis to Sofia have flexible cancellations due to COVID-19?

Due to the rapidly changing circumstances due to COVID-19, airlines like Lufthansa, United Airlines, and KLM flying from Lambert-St Louis to Sofia have implemented new flexible cancellation policies.

Can I find flights from St. Louis to Sofia for under $1,200 on Cheapflights?

Yes, there are multiple flights from St. Louis to Sofia for under $1,200. The cheapest flight booked recently is on Multiple Airlines for just $1,143, but on average you can expect to pay $1,482.

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

British Airways, at $1,327, was found to be the cheapest airline from St. Louis to Sofia.Alternate airlines to your destination round-trip include Air France and Lufthansa.

What are the most popular airlines that fly from St. Louis to Sofia?

American Airlines, Air France and British Airways are the most popular airlines when flying from St. Louis to Sofia.

What are the cheapest flights from St. Louis to Sofia?

Looking for the cheapest flight from St. Louis to Sofia? While on average our users pay $939, our data indicates the cheapest price to be $720. The most popular route (Lambert-St Louis - Sofia), is priced around $794.

COVID Restrictions

View COVID Travel Restrictions for Sofia, Bulgaria

Do I need a COVID test to fly to Sofia from St. Louis?

Information is based on travel restrictions from Lambert-St Louis to Sofia

Most visitors from Lambert-St Louis can enter Sofia without restrictions.

COVID-19 testing requirements
Visitors from Lambert-St Louis are not required to present a negative COVID-19 PCR test or antigen result upon entering Sofia.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Sofia.

Do I need a test to fly back to St. Louis from Sofia?

Returning to Lambert-St Louis from Sofia

COVID-19 testing requirements
Visitors from Sofia are not required to present a negative COVID-19 PCR test or antigen result upon entering Lambert-St Louis.

Quarantine requirements
Visitors from Sofia are not required to quarantine after entering Lambert-St Louis.

Hide COVID Travel Restrictions for Sofia, Bulgaria

Alternative routes for St. Louis to Sofia

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Sofia

Things to know before you go - useful duration and weather info for your trip from St. Louis to Sofia.
Today's exchange rate
$1 = 1.87 Лв
Average temperature for June in Sofia
77.0 °F
Avg rainfall for June in Sofia
3.2 ″

Airports servicing St. Louis

Airports servicing Sofia

Top 3 airlines flying from Lambert-St Louis to Sofia

The chart below displays the airlines Cheapflights users traveling from St. Louis to Sofia choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
KLM
$483 $774 No cancel fee 75%
United Airlines
$651 $966 No cancel fee 69%
Lufthansa
$775 $1,045 No cancel fee 76%
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