Which layover airport has the shortest connection time from Philadelphia to Sofia?

Frankfurt am Main (FRA) has the shortest average layover time for this route: 4h 09m.

What is the cheapest airline that flies from Philadelphia to Sofia?

United Airlines is the most popular carrier operating from Philadelphia to Sofia

Which layover airport offers the lowest fares from Philadelphia to Sofia?

Flights via London (LHR) offer the lowest average round-trip price of $576.

Which layover airport has the shortest travel time from Philadelphia to Sofia?

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 12h 59m.

Which airport is the most popular layover for flights between Philadelphia and Sofia?

Frankfurt am Main (FRA) was the most common stop: 98% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Sofia?

United Airlines, Lufthansa and Turkish Airlines are the top three most popular airlines that fly to Sofia from Philadelphia according to our data. United Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 12 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Philadelphia Airport to Sofia Airport?

Prices for flights from Philadelphia Airport to Sofia Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Philadelphia Airport to Sofia Airport?

The number of operators available for flights from Philadelphia Airport to Sofia Airport is 2 as of May 2026.

How old do you have to be to fly from Philadelphia Airport to Sofia Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The travel and health documents required for your trip to Sofia Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sofia Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$482 Cheap Flights from Philadelphia to Sofia in 2026

Q: What is the typical price of a round-trip flight between Philadelphia and Sofia?

Prices are currently low for flights on this route. Typical prices usually range from $1,435 to $1,066. The lowest price recently found on this route was $738.

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Find the cheapest flights from Philadelphia to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:30 am - 12:10 pm

PHL

SOF

18h 40m

2 stops

6:20 am - 4:05 pm

SOF

PHL

16h 45m

1 stop

$738United Airlines

Wed, Sep 9 - Wed, Sep 16

10:28 am - 12:10 pm

PHL

SOF

18h 42m

2 stops

6:20 am - 4:05 pm

SOF

PHL

16h 45m

1 stop

$739United Airlines

Wed, Sep 9 - Wed, Sep 16

12:02 pm - 2:00 pm

PHL

SOF

18h 58m

2 stops

7:00 am - 8:43 pm

SOF

PHL

20h 43m

2 stops

$745Multiple Airlines

Wed, Sep 9 - Wed, Sep 16

5:40 pm - 6:05 pm

PHL

SOF

17h 25m

1 stop

6:20 am - 4:05 pm

SOF

PHL

16h 45m

1 stop

$746Lufthansa

Wed, Sep 9 - Wed, Sep 16

10:28 am - 12:10 pm

PHL

SOF

18h 42m

2 stops

6:20 am - 9:43 am

SOF

PHL

34h 23m

2 stops

$749United Airlines

Wed, Sep 9 - Wed, Sep 16

3:10 pm - 12:10 pm

PHL

SOF

14h 00m

2 stops

6:30 am - 4:05 pm

SOF

PHL

16h 35m

1 stop

$798United Airlines

Tue, Aug 4 - Thu, Aug 20

8:05 am - 11:15 pm

PHL

SOF

32h 10m

2 stops

6:10 am - 9:27 pm

SOF

PHL

22h 17m

2 stops

$809United Airlines

Tue, Jul 28 - Sun, Aug 30

10:32 am - 12:10 pm

PHL

SOF

18h 38m

2 stops

6:30 am - 2:21 pm

SOF

PHL

38h 51m

2 stops

$813United Airlines

Tue, Aug 4 - Thu, Aug 20

5:40 pm - 6:00 pm

PHL

SOF

17h 20m

1 stop

6:30 am - 4:05 pm

SOF

PHL

16h 35m

1 stop

$851Lufthansa

Tue, Aug 4 - Thu, Aug 20

12:02 pm - 2:00 pm

PHL

SOF

18h 58m

2 stops

7:00 am - 7:15 pm

SOF

PHL

19h 15m

2 stops

$852Multiple Airlines

Mon, Jul 13 - Tue, Jul 28

United Airlines flights from Philadelphia to Sofia

Our best United Airlines deals on Philadelphia to Sofia flight tickets

United Airlines

Sep 9

PHL10:30 amPhiladelphia

18h 40m

2 stops

SOF12:10 pmSofia

Sep 16

SOF6:20 amSofia

16h 45m

1 stop

PHL4:05 pmPhiladelphia

$738

United Airlines

Sep 9

PHL10:28 amPhiladelphia

18h 42m

2 stops

SOF12:10 pmSofia

Sep 16

SOF6:20 amSofia

16h 45m

1 stop

PHL4:05 pmPhiladelphia

$739

United Airlines

Sep 9

PHL10:28 amPhiladelphia

18h 42m

2 stops

SOF12:10 pmSofia

Sep 16

SOF6:20 amSofia

34h 23m

2 stops

PHL9:43 amPhiladelphia

$749

Lufthansa flights from Philadelphia to Sofia

Our best Lufthansa deals on Philadelphia to Sofia flight tickets

Lufthansa

Sep 9

PHL5:40 pmPhiladelphia

17h 25m

1 stop

SOF6:05 pmSofia

Sep 16

SOF6:20 amSofia

16h 45m

1 stop

PHL4:05 pmPhiladelphia

$746

Lufthansa

Aug 4

PHL5:40 pmPhiladelphia

17h 20m

1 stop

SOF6:00 pmSofia

Aug 20

SOF6:30 amSofia

16h 35m

1 stop

PHL4:05 pmPhiladelphia

$851

Lufthansa

May 25

PHL5:40 pmPhiladelphia

22h 00m

1 stop

SOF10:40 pmSofia

Jun 8

SOF7:00 pmSofia

28h 05m

1 stop

PHL4:05 pmPhiladelphia

$864

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

10:30 am-12:10 pm

2 stops18h 40m

Sofia

Wed 9/16

6:20 am-4:05 pm

1 stop16h 45m

$738

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

10:28 am-12:10 pm

2 stops18h 42m

Sofia

Wed 9/16

6:20 am-4:05 pm

1 stop16h 45m

$739

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

12:02 pm-2:00 pm

2 stops18h 58m

Sofia

Wed 9/16

7:00 am-8:43 pm

2 stops20h 43m

$745

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

5:40 pm-6:05 pm

1 stop17h 25m

Sofia

Wed 9/16

6:20 am-4:05 pm

1 stop16h 45m

$746

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

10:28 am-12:10 pm

2 stops18h 42m

Sofia

Wed 9/16

6:20 am-9:43 am

2 stops34h 23m

$749

Quickest round-trip

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 8/4

3:10 pm-12:10 pm

2 stops14h 00m

Sofia

Thu 8/20

6:30 am-4:05 pm

1 stop16h 35m

$798

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 7/28

8:05 am-11:15 pm

2 stops32h 10m

Sofia

Sun 8/30

6:10 am-9:27 pm

2 stops22h 17m

$809

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 8/4

10:32 am-12:10 pm

2 stops18h 38m

Sofia

Thu 8/20

6:30 am-2:21 pm

2 stops38h 51m

$813

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 8/4

5:40 pm-6:00 pm

1 stop17h 20m

Sofia

Thu 8/20

6:30 am-4:05 pm

1 stop16h 35m

$851

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 7/13

12:02 pm-2:00 pm

2 stops18h 58m

Sofia

Tue 7/28

7:00 am-7:15 pm

2 stops19h 15m

$852

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Philadelphia to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Philadelphia and Sofia?

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Philadelphia is in April. Flight prices, which tend to average around $514, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of April, then book flights to Sofia from Philadelphia during October instead. Flights to Sofia in October, while not as cheap as those in April, still average around $518.

Can stopping save me money on Philadelphia to Sofia flights?

You could potentially save up to 52% on your flight if you consider stops on a Philadelphia to Sofia flight.

When to book flights from Philadelphia to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to Sofia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Philadelphia to Sofia (PHL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Sofia

Fastest flight time	14h 00m
Direct flights	None

The fastest flight from Philadelphia to Sofia takes 14h 00m

There are no direct flights from Philadelphia to Sofia. There are no popular flight routes from Philadelphia to Sofia.

Search flight deals

Frequently asked questions about flying from Philadelphia to Sofia

How far is Philadelphia to Sofia by plane?
Sofia is 4789.3 mi away from Philadelphia. In terms of flight time, this usually takes a little over 14h 00m.
When did momondo last update prices for flights from Philadelphia Airport to Sofia Airport?
Prices for flights from Philadelphia Airport to Sofia Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Philadelphia Airport to Sofia Airport?
The number of operators available for flights from Philadelphia Airport to Sofia Airport is 2 as of May 2026.
How old do you have to be to fly from Philadelphia Airport to Sofia Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The travel and health documents required for your trip to Sofia Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sofia Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Philadelphia to Sofia?
Based on momondo bookings for flights between Philadelphia and Sofia, the leading airline is Lufthansa, making up 70% of the total bookings. Other popular airlines include United Airlines with 30%.

Best airlines flying from Philadelphia to Sofia

Compare and see reviews for airlines that fly from Philadelphia to Sofia with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $497	Free Cancellation	Rating 6.8 8,004 reviews		Search Lufthansa flights
United Airlines	PriceFrom $540	Free Cancellation	Rating 7.4 9,726 reviews		Search United Airlines flights

Bansko

Borovets

Velingrad

Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to Sofia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Philadelphia to Sofia. momondo saves you time and could save you money on your trip.

Can I find flights from Philadelphia to Sofia with flexible booking policies on momondo?

momondo does allow users to show only those flights to Sofia from Philadelphia which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Philadelphia to Sofia?

Once you have performed a search for Philadelphia to Sofia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Philadelphia to Sofia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Sofia from Philadelphia. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.