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

Qatar Airways is the most popular carrier operating from Sofia to Philadelphia

What airlines fly to Philadelphia?

Lufthansa, Turkish Airlines and LOT are the top three most popular airlines that fly to Philadelphia from Sofia according to our data. Lufthansa is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 8 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

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

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

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

There are 2 operators available for flights from Sofia Airport to Philadelphia Airport as of November 2025.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Sofia Airport to Philadelphia Airport.

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

The necessary travel and health documents for your Philadelphia Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$524 Cheap Flights from Sofia to Philadelphia in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Sofia to Philadelphia

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 4:05 pmSOF-PHL

17h 05m1 stop

5:40 pm - 1:50 pmPHL-SOF

13h 10m1 stop

$639Lufthansa

Find Deal

Thu, Nov 20 - Thu, Nov 27

6:05 am - 4:05 pmSOF-PHL

17h 00m2 stops

5:40 pm - 1:50 pmPHL-SOF

13h 10m1 stop

$646Lufthansa

Find Deal

Thu, Nov 20 - Thu, Nov 27

6:00 am - 7:05 pmSOF-PHL

20h 05m2 stops

6:00 am - 1:50 pmPHL-SOF

24h 50m2 stops

$669United Airlines

Find Deal

Thu, Nov 20 - Thu, Nov 27

6:00 am - 10:46 pmSOF-PHL

23h 46m2 stops

6:10 am - 10:45 pmPHL-SOF

33h 35m2 stops

$678United Airlines

Find Deal

Tue, Dec 23 - Sun, Jan 4

6:10 am - 11:30 pmSOF-PHL

24h 20m2 stops

6:10 am - 10:45 pmPHL-SOF

33h 35m2 stops

$681United Airlines

Find Deal

Wed, Dec 24 - Sun, Jan 4

6:00 am - 2:07 pmSOF-PHL

39h 07m2 stops

6:10 am - 10:45 pmPHL-SOF

33h 35m2 stops

$682United Airlines

Find Deal

Tue, Dec 23 - Sun, Jan 4

2:25 pm - 4:05 pmSOF-PHL

32h 40m1 stop

6:10 am - 10:45 pmPHL-SOF

33h 35m2 stops

$691United Airlines

Find Deal

Wed, Dec 24 - Sun, Jan 4

5:00 am - 4:05 pmSOF-PHL

18h 05m3 stops

5:40 pm - 9:00 pmPHL-SOF

20h 20m2 stops

$768Multiple Airlines

Find Deal

Thu, Nov 20 - Thu, Nov 27

2:25 pm - 4:05 pmSOF-PHL

32h 40m1 stop

5:40 pm - 1:35 pmPHL-SOF

12h 55m1 stop

$893Lufthansa

Find Deal

Wed, Dec 24 - Sun, Jan 4

2:25 pm - 4:05 pmSOF-PHL

32h 40m1 stop

5:40 pm - 1:35 pmPHL-SOF

12h 55m1 stop

$895Lufthansa

Find Deal

Wed, Dec 24 - Sun, Jan 4

Lufthansa flights from Sofia to Philadelphia

Our best Lufthansa deals on Sofia to Philadelphia flight tickets

Lufthansa

Nov 20

SOF6:00 amSofia

17h 05m

1 stop

PHL4:05 pmPhiladelphia

Nov 27

PHL5:40 pmPhiladelphia

13h 10m

1 stop

SOF1:50 pmSofia

$639

Find similar

Lufthansa

Nov 20

SOF6:05 amSofia

17h 00m

2 stops

PHL4:05 pmPhiladelphia

Nov 27

PHL5:40 pmPhiladelphia

13h 10m

1 stop

SOF1:50 pmSofia

$646

Find similar

Lufthansa

Dec 24

SOF2:25 pmSofia

32h 40m

1 stop

PHL4:05 pmPhiladelphia

Jan 4

PHL5:40 pmPhiladelphia

12h 55m

1 stop

SOF1:35 pmSofia

$893

Find similar

United Airlines flights from Sofia to Philadelphia

Our best United Airlines deals on Sofia to Philadelphia flight tickets

United Airlines

Nov 20

SOF6:00 amSofia

20h 05m

2 stops

PHL7:05 pmPhiladelphia

Nov 27

PHL6:00 amPhiladelphia

24h 50m

2 stops

SOF1:50 pmSofia

$669

Find similar

United Airlines

Nov 14

SOF6:05 amSofia

39h 01m

2 stops

PHL2:06 pmPhiladelphia

Nov 23

PHL8:00 pmPhiladelphia

15h 20m

2 stops

SOF6:20 pmSofia

$670

Find similar

United Airlines

Dec 23

SOF6:00 amSofia

23h 46m

2 stops

PHL10:46 pmPhiladelphia

Jan 4

PHL6:10 amPhiladelphia

33h 35m

2 stops

SOF10:45 pmSofia

$678

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SofiaPhiladelphia

SOF - PHL

SOFPHL

Sofia

Thu 11/20

6:00 am-4:05 pm

1 stop17h 05m

Philadelphia

Thu 11/27

5:40 pm-1:50 pm

1 stop13h 10m

$639

SofiaPhiladelphia

SOF - PHL

SOFPHL

Sofia

Thu 11/20

6:05 am-4:05 pm

2 stops17h 00m

Philadelphia

Thu 11/27

5:40 pm-1:50 pm

1 stop13h 10m

$646

SofiaPhiladelphia

SOF - PHL

SOFPHL

Sofia

Thu 11/20

6:00 am-7:05 pm

2 stops20h 05m

Philadelphia

Thu 11/27

6:00 am-1:50 pm

2 stops24h 50m

$669

SofiaPhiladelphia

SOF - PHL

SOFPHL

Sofia

Tue 12/23

6:00 am-10:46 pm

2 stops23h 46m

Philadelphia

Sun 1/4

6:10 am-10:45 pm

2 stops33h 35m

$678

SofiaPhiladelphia

SOF - PHL

SOFPHL

Sofia

Wed 12/24

6:10 am-11:30 pm

2 stops24h 20m

Philadelphia

Sun 1/4

6:10 am-10:45 pm

2 stops33h 35m

$681

SofiaPhiladelphia

SOF - PHL

SOFPHL

Sofia

Tue 12/23

6:00 am-2:07 pm

2 stops39h 07m

Philadelphia

Sun 1/4

6:10 am-10:45 pm

2 stops33h 35m

$682

SofiaPhiladelphia

SOF - PHL

SOFPHL

Sofia

Wed 12/24

2:25 pm-4:05 pm

1 stop32h 40m

Philadelphia

Sun 1/4

6:10 am-10:45 pm

2 stops33h 35m

$691

SofiaPhiladelphia

SOF - PHL

SOFPHL

Sofia

Thu 11/20

5:00 am-4:05 pm

3 stops18h 05m

Philadelphia

Thu 11/27

5:40 pm-9:00 pm

2 stops20h 20m

$768

SofiaPhiladelphia

SOF - PHL

SOFPHL

Sofia

Wed 12/24

2:25 pm-4:05 pm

1 stop32h 40m

Philadelphia

Sun 1/4

5:40 pm-1:35 pm

1 stop12h 55m

$893

SofiaPhiladelphia

SOF - PHL

SOFPHL

Sofia

Wed 12/24

2:25 pm-4:05 pm

1 stop32h 40m

Philadelphia

Sun 1/4

5:40 pm-1:35 pm

1 stop12h 55m

$895

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from Sofia to Philadelphia

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

What is the cheapest month to fly to Philadelphia?

The cheapest month to fly to Philadelphia from Sofia is in March. Flight prices, which tend to average around $581, are often lower during this time because this is during the off-season. The month of September is another great option to travel to Philadelphia, with average flight prices from Sofia averaging around $602.

What is the cheapest day to depart on your flight to Philadelphia?

The cheapest day to depart from Sofia to Philadelphia is on a Wednesday. Travelers who choose to depart for Philadelphia on a Wednesday will often find tickets for as low as $579. On the other hand, Thursday is the most expensive day to depart from Sofia because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $986.

What is the cheapest time of day to depart on your flight to Philadelphia?

According to our data, the cheapest time of day to fly to Philadelphia is in the evening. momondo users have found flights departing from Sofia to Philadelphia in the evening for as low as $651. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the morning when prices are around $742.

Can stopping save me money on Sofia to Philadelphia flights?

You could potentially save up to 5% on your flight if you consider stops on a Sofia to Philadelphia flight.

When to book flights from Sofia to Philadelphia

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

Estimated round-trip price

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

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

Direct flights	None

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

Search flight deals

How far is Sofia to Philadelphia by plane?
The straight-line distance from Sofia to Philadelphia is 4789.3 mi. Typically, this will take 15h 11m by plane in normal conditions.
When did momondo last update prices for flights from Sofia Airport to Philadelphia Airport?
Prices for flights from Sofia Airport to Philadelphia Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Sofia Airport to Philadelphia Airport?
There are 2 operators available for flights from Sofia Airport to Philadelphia Airport as of November 2025.
How old do you have to be to fly from Sofia Airport to Philadelphia Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Sofia Airport to Philadelphia Airport.
What documentation or ID do you need to fly to Philadelphia Airport?
The necessary travel and health documents for your Philadelphia Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Sofia to Philadelphia?
Based on momondo bookings for flights between Sofia and Philadelphia, the leading airline is Lufthansa, making up 70% of the total bookings. Other popular airlines include United Airlines with 30%.

Best airlines flying from Sofia to Philadelphia

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $588	Free Cancellation	Rating 7.4 9,007 reviews		Search United Airlines flights
Lufthansa	PriceFrom $636	Free Cancellation	Rating 6.8 7,558 reviews		Search Lufthansa flights

Wildwood

Cape May

Rehoboth Beach

Ocean City

Wildwood Crest

King of Prussia

Cherry Hill

Dewey Beach

Newark

Reading

North Wildwood

Dover

Avalon

Lewes

Stone Harbor

Essington

Vineland

Pottstown

New Castle

Somers Point

Why use momondo?

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

It is quick and easy to find Sofia to Philadelphia flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Philadelphia that suits you.

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

Yes. All flights to Philadelphia from Sofia on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential Sofia to Philadelphia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Philadelphia, momondo offers a useful price alert feature which will track prices for flights to Philadelphia from Sofia and alert you when they change.