Question 1

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

Accepted Answer

The best time to book flights from St. Louis to Sofia is 36 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Question 2

What is the cheapest month to book a flight from St. Louis to Sofia?

Accepted Answer

Currently, November is the cheapest month in which you can book a flight from St. Louis to Sofia (average of $632). Flying from St. Louis to Sofia 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.

Question 3

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

Accepted Answer

Travelers seeking maximum savings on their St. Louis to Sofia flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 4

E

Accepted Answer

In terms of precipitation, rainfall in Sofia ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Sofia when rainfall is around 1.2 in.

Question 5

E

Accepted Answer

If weather is an important factor for your trip to Sofia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Question 6

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

Accepted Answer

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

Question 7

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

Accepted Answer

To save on the cost of your flight from St. Louis to Sofia, book at least 37 days before your planned departure. Booking around this time can save you about 82% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $1,034 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $1,166.

Question 8

What is the cheapest month to fly from St. Louis to Sofia?

Accepted Answer

The best pricing can be found in the month of February. Prices to Sofia from St. Louis average $985. You can even find prices in February for less than $985, as users have found deals to Sofia from as low as $640. The month of June appears to be one of the more expensive times to travel to Sofia from St. Louis. Flying in the targeted month can save you up to 47%.

Question 9

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

Accepted Answer

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 morning, which can drop the price by up to 11% versus a flight in the afternoon.

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

Yes. Cheapflights offers flight deals from St. Louis to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Popular in	June
Cheapest in	February
Average price	$925

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest$706	Average$1,016	FlexibilityNo cancel fee	On-time76%
United Airlines	Cheapest$711	Average$936	FlexibilityNo cancel fee	On-time69%

$450+ Cheap flights from St. Louis (STL) to Sofia (SOF)

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.

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Cheapflights Tip: The best prices from Lambert-St Louis to Sofia are usually found in February or January, booked 37 days in advance, depart on a Saturday or Sunday and return on a Tuesday

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One-way flights from St. Louis to SofiaSearch for one-way flight options from St. Louis to Sofia. 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 Sofia. Find affordable one-way fares based on user searches. Data last updated July 30, 2025.

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

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Everything you need to know about your flight from St. Louis to Sofia

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Sofia. Price data was last updated on July 25, 2025.

What is the cheapest month to book a flight from St. Louis to Sofia?

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. 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 Sofia. Reviews last updated July 30, 2025.

Read through reviews of airlines operating flights from St. Louis to Sofia, such as Lufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

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

What is the cheapest month to book a flight from St. Louis to Sofia?

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One-way flights from St. Louis to Sofia
Search for one-way flight options from St. Louis to Sofia. Find affordable one-way fares based on user searches. Data last updated July 30, 2025.