Which airports can I use when flying from St. Louis to Sofia?

Flights from St. Louis to Sofia usually depart from Lambert-St Louis (STL) and arrive at Sofia (SOF).

What cabin classes can I book on flights from St. Louis to Sofia?

Only Economy Class is available on flights from St. Louis to Sofia.

Which airports do connecting flights from St. Louis to Sofia pass through?

Most connecting flights from St. Louis to Sofia pass through Frankfurt am Main (FRA), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

Can I save money by using flexible dates for flights from St. Louis to Sofia?

Yes. Being flexible with your travel dates can save you up to 38% on the St. Louis to Sofia route. Thursday is the cheapest departure day at $689 round-trip on average, while Tuesday is the most expensive at $1,108, a difference of $419. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Sofia?

Some of the most popular sights in Sofia are Sofia City Centre, The St. Alexander Nevsky Cathedral and Vitosha Boulevard. These are among the most viewed places in Sofia on KAYAK.

How long is a flight from St. Louis to Sofia?

A nonstop flight from St. Louis to Sofia takes 0h 00m, covering 5,444 miles.

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

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from St. Louis to Sofia changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $646 to $4,120. That means the highest observed fare was about 6x higher than the lowest one.

What is the time difference between St. Louis and Sofia?

Sofia is 8 hours ahead of St. Louis (Eastern European Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Sofia Airport (SOF)?

Sofia Airport (SOF) hosts 5 major car rental companies, with daily rates starting from around $1 for economy cars. Top options include: • MEXRENTACAR • Easyrent • Top Rent a Car - Bulgaria • NU Car • Priceless

How much should I expect to pay for a St. Louis to Sofia flight?

Round-trip flights from St. Louis to Sofia range from $768 to $1,060, with an average of $859 over the past 12 months. Anything below $768 counts as a good deal.

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

Austrian Airlines ($646) and Lufthansa ($647) are the cheapest airlines to fly round-trip from St. Louis to Sofia according to KAYAK data over the last 5 days.

What is the cheapest layover airport when flying from St. Louis to Sofia?

Flights via Frankfurt am Main (FRA) offer the most affordable fares, with an average round-trip price of $908. Based on KAYAK data over the past 3 months.

When flying from St. Louis to Sofia which airport offers the shortest layover?

Frankfurt am Main (FRA) had the shortest average connection time for St. Louis to Sofia layovers at 555 minutes over the past 3 months.

$646 CHEAP FLIGHTS from St. Louis to Sofia (STL - SOF)

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Cheapest round-trip

$646

Typical prices: $768-$1,060

Austrian Airlines

Sun 10/28Sun 11/4

STL - SOF • 2 stops

Nonstop flights

Not available

There are currently no direct flights between St. Louis and Sofia. You'll need to take a connecting flight to reach the destination.

Insights

When to travel

January

Cheapest • 39% price drop

July

Most popular

Good to know

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We hope you love your trip to Sofia!

Flight Deals

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

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from St. Louis to Sofia

Wed, Oct 28 - Wed, Nov 4

1:08 pm - 6:00 pmSTL Lambert-St Louis-SOF Sofia

21h 52m2 stops Chicago O'Hare Intl Vienna Intl

7:55 am - 9:52 pmSOF Sofia-STL Lambert-St Louis

21h 57m2 stops Vienna Intl Newark

$646Austrian Airlines

Mon, Nov 30 - Fri, Mar 12

6:50 pm - 6:20 pmSTL Lambert-St Louis-SOF Sofia

15h 30m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:00 am - 9:13 pmSOF Sofia-STL Lambert-St Louis

23h 13m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$647Lufthansa

Mon, Nov 30 - Thu, Mar 11

6:50 pm - 6:20 pmSTL Lambert-St Louis-SOF Sofia

15h 30m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:00 am - 9:13 pmSOF Sofia-STL Lambert-St Louis

23h 13m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$647Lufthansa

Mon, Nov 23 - Fri, Mar 12

6:50 pm - 6:20 pmSTL Lambert-St Louis-SOF Sofia

15h 30m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:00 am - 9:13 pmSOF Sofia-STL Lambert-St Louis

23h 13m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$647Lufthansa

Wed, Oct 28 - Wed, Nov 4

4:05 pm - 3:25 pmSTL Lambert-St Louis-SOF Sofia

16h 20m2 stops Toronto Pearson Intl Zurich

6:25 am - 1:45 pmSOF Sofia-STL Lambert-St Louis

15h 20m1 stop Frankfurt am Main

$649Multiple Airlines

Mon, Oct 26 - Mon, Feb 8

1:08 pm - 6:00 pmSTL Lambert-St Louis-SOF Sofia

21h 52m2 stops Chicago O'Hare Intl Vienna Intl

12:35 pm - 9:53 pmSOF Sofia-STL Lambert-St Louis

41h 18m2 stops Vienna Intl Newark

$649Austrian Airlines

Tue, Nov 17 - Fri, Mar 12

11:29 am - 1:15 pmSTL Lambert-St Louis-SOF Sofia

17h 46m2 stops Newark Munich Franz Josef Strauss

6:00 am - 4:40 pmSOF Sofia-STL Lambert-St Louis

18h 40m2 stops Munich Franz Josef Strauss Newark

$663United Airlines

Mon, Nov 23 - Fri, Mar 12

11:29 am - 1:15 pmSTL Lambert-St Louis-SOF Sofia

17h 46m2 stops Newark Munich Franz Josef Strauss

6:00 am - 4:40 pmSOF Sofia-STL Lambert-St Louis

18h 40m2 stops Munich Franz Josef Strauss Newark

$663United Airlines

Sun, Nov 22 - Fri, Mar 12

4:05 pm - 1:25 pmSTL Lambert-St Louis-SOF Sofia

37h 20m2 stops Toronto Pearson Intl Frankfurt am Main

6:00 am - 3:26 pmSOF Sofia-STL Lambert-St Louis

41h 26m2 stops Munich Franz Josef Strauss Toronto Pearson Intl

$686Air Canada

Tue, Dec 1 - Thu, Mar 11

4:05 pm - 1:25 pmSTL Lambert-St Louis-SOF Sofia

37h 20m2 stops Toronto Pearson Intl Frankfurt am Main

6:00 am - 3:26 pmSOF Sofia-STL Lambert-St Louis

41h 26m2 stops Munich Franz Josef Strauss Toronto Pearson Intl

$704Air Canada

Booking Insights

Price, demand and travel trends for St. Louis to Sofia flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from St. Louis to Sofia with more confidence.

Prices

Airlines

Layovers

How much is a round-trip flight from St. Louis to Sofia?

Round-trip flights from St. Louis to Sofia start at $646. Prices are below average for this route right now, with typical round-trip fares ranging from $768 to $1,060. The lowest price found in the past 5 days was $646 on Austrian Airlines.

What's the cheapest day of the week to fly from St. Louis to Sofia?

Thursday is the cheapest day of the week to fly from St. Louis to Sofia, it is 20% cheaper than the average day. Tuesday is the most expensive day with flight prices 28% higher than average. Based on deals found by KAYAK users in the last 12 months.

Find deals

Low season	February
High season	July

Best time to beat the crowds with an average 34% drop in price.

Most popular time to fly with an average 11% increase in price.

When to book flights from St. Louis to Sofia

Are your dates flexible? Find out the best times to travel from St. Louis to Sofia based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from St. Louis to Sofia?
Flights from St. Louis to Sofia usually depart from Lambert-St Louis (STL) and arrive at Sofia (SOF).
What cabin classes can I book on flights from St. Louis to Sofia?
Only Economy Class is available on flights from St. Louis to Sofia.
Which airports do connecting flights from St. Louis to Sofia pass through?
Most connecting flights from St. Louis to Sofia pass through Frankfurt am Main (FRA), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.
Can I save money by using flexible dates for flights from St. Louis to Sofia?
Yes. Being flexible with your travel dates can save you up to 38% on the St. Louis to Sofia route. Thursday is the cheapest departure day at $689 round-trip on average, while Tuesday is the most expensive at $1,108, a difference of $419. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What popular places can I visit in Sofia?
Some of the most popular sights in Sofia are Sofia City Centre, The St. Alexander Nevsky Cathedral and Vitosha Boulevard. These are among the most viewed places in Sofia on KAYAK.
How long is a flight from St. Louis to Sofia?
A nonstop flight from St. Louis to Sofia takes 0h 00m, covering 5,444 miles.
Do I need a passport to fly from St. Louis to Sofia?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
Have flight prices from St. Louis to Sofia changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $646 to $4,120. That means the highest observed fare was about 6x higher than the lowest one.
What is the time difference between St. Louis and Sofia?
Sofia is 8 hours ahead of St. Louis (Eastern European Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at Sofia Airport (SOF)?
Sofia Airport (SOF) hosts 5 major car rental companies, with daily rates starting from around $1 for economy cars. Top options include:
• MEXRENTACAR
• Easyrent
• Top Rent a Car - Bulgaria
• NU Car
• Priceless
How much should I expect to pay for a St. Louis to Sofia flight?
Round-trip flights from St. Louis to Sofia range from $768 to $1,060, with an average of $859 over the past 12 months. Anything below $768 counts as a good deal.

If your dates can be flexible, aim for a Thursday departure instead of Tuesday. On this route, Thursday flights average $689 - about $419 less than Tuesday (38% savings) based on the last 12 months.
If you can choose when to travel, plan your St. Louis to Sofia trip for January. Fares historically average $528 round-trip in that month - typically $704 less than the most expensive month, which is June (based on the last 12 months).
If you're arriving late at night and need somewhere to stay, check out these hotels close to Sofia Airport.
- Hotel Premier Airport Sofia
- ibis Sofia Airport
- Avel Guest House

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STL - SOF

$646 Find Cheap Flights from St. Louis to Sofia - Compare and Save

Everything you should know

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

Recent round-trip flight deals from St. Louis to Sofia

Recent one-way flight deals from St. Louis to Sofia

Price, demand and travel trends for St. Louis to Sofia flights

How much is a round-trip flight from St. Louis to Sofia?

What's the cheapest day of the week to fly from St. Louis to Sofia?

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

What is the cheapest layover airport when flying from St. Louis to Sofia?

When flying from St. Louis to Sofia which airport offers the shortest layover?

Key details for St. Louis to Sofia flights

Low season

High season

When to book flights from St. Louis to Sofia

Your St. Louis to Sofia flight questions, answered

Your guide to booking St. Louis to Sofia flights

More options for your flight from St. Louis to Sofia

Complete your trip to Sofia with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from St. Louis to Sofia

Find direct flights to and from St. Louis and Sofia

Flights from domestic origins to Sofia

Flights to other popular destinations