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 36% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 11 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 July 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.

$368 Cheap Flights from Philadelphia to Sofia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Philadelphia to Sofia

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:20 pm - 12:10 pm

PHL

SOF

36h 50m

2 stops

6:20 am - 4:05 pm

SOF

PHL

16h 45m

1 stop

$691Multiple Airlines

Mon, Aug 10 - Wed, Aug 26

6:10 am - 12:10 pm

PHL

SOF

23h 00m

2 stops

6:20 am - 12:59 am

SOF

PHL

25h 39m

2 stops

$707United Airlines

Mon, Aug 10 - Wed, Aug 26

3:20 pm - 10:45 pm

PHL

SOF

24h 25m

2 stops

6:00 am - 2:44 pm

SOF

PHL

39h 44m

2 stops

$709Multiple Airlines

Mon, Jan 4 - Wed, Jan 27

5:40 pm - 6:00 pm

PHL

SOF

17h 20m

1 stop

6:20 am - 4:05 pm

SOF

PHL

16h 45m

1 stop

$713Multiple Airlines

Mon, Aug 10 - Wed, Aug 26

6:10 am - 11:15 pm

PHL

SOF

34h 05m

2 stops

6:20 am - 12:59 am

SOF

PHL

25h 39m

2 stops

$716United Airlines

Wed, Jul 29 - Wed, Aug 19

10:05 am - 10:20 am

PHL

SOF

17h 15m

2 stops

6:00 am - 10:56 pm

SOF

PHL

22h 56m

2 stops

$720Multiple Airlines

Wed, Oct 14 - Wed, Oct 28

4:20 pm - 6:40 pm

PHL

SOF

43h 20m

2 stops

7:00 pm - 4:05 pm

SOF

PHL

28h 05m

1 stop

$723Lufthansa

Sat, Aug 8 - Mon, Aug 24

4:20 pm - 6:40 pm

PHL

SOF

43h 20m

2 stops

6:55 pm - 4:05 pm

SOF

PHL

28h 10m

2 stops

$724Multiple Airlines

Sat, Aug 8 - Mon, Aug 24

3:20 pm - 1:15 pm

PHL

SOF

14h 55m

2 stops

7:00 pm - 4:05 pm

SOF

PHL

28h 05m

1 stop

$726Multiple Airlines

Mon, Jan 4 - Wed, Jan 27

7:40 pm - 6:40 pm

PHL

SOF

16h 00m

2 stops

6:10 am - 4:05 pm

SOF

PHL

16h 55m

1 stop

$736United Airlines

Sun, Sep 13 - Tue, Sep 29

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Lufthansa flights from Philadelphia to Sofia

Our best Lufthansa deals on Philadelphia to Sofia flight tickets

Lufthansa

Aug 8

PHL4:20 pmPhiladelphia

43h 20m

2 stops

SOF6:40 pmSofia

Aug 24

SOF7:00 pmSofia

28h 05m

1 stop

PHL4:05 pmPhiladelphia

$723

Lufthansa

Oct 14

PHL5:40 pmPhiladelphia

17h 25m

1 stop

SOF6:05 pmSofia

Oct 28

SOF2:05 pmSofia

33h 00m

1 stop

PHL5:05 pmPhiladelphia

$759

Lufthansa

Oct 14

PHL5:40 pmPhiladelphia

17h 25m

1 stop

SOF6:05 pmSofia

Oct 28

SOF2:05 pmSofia

33h 00m

1 stop

PHL5:05 pmPhiladelphia

$761

Austrian Airlines flights from Philadelphia to Sofia

Our best Austrian Airlines deals on Philadelphia to Sofia flight tickets

Austrian Airlines

Aug 10

PHL5:40 pmPhiladelphia

17h 30m

2 stops

SOF6:10 pmSofia

Aug 26

SOF12:25 pmSofia

34h 40m

2 stops

PHL4:05 pmPhiladelphia

$798

Austrian Airlines

Aug 3

PHL5:40 pmPhiladelphia

35h 00m

2 stops

SOF11:40 amSofia

Aug 11

SOF6:55 pmSofia

52h 10m

2 stops

PHL4:05 pmPhiladelphia

$823

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 8/10

4:20 pm-12:10 pm

2 stops36h 50m

Sofia

Wed 8/26

6:20 am-4:05 pm

1 stop16h 45m

$691

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 8/10

6:10 am-12:10 pm

2 stops23h 00m

Sofia

Wed 8/26

6:20 am-12:59 am

2 stops25h 39m

$707

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 1/4

3:20 pm-10:45 pm

2 stops24h 25m

Sofia

Wed 1/27

6:00 am-2:44 pm

2 stops39h 44m

$709

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 8/10

5:40 pm-6:00 pm

1 stop17h 20m

Sofia

Wed 8/26

6:20 am-4:05 pm

1 stop16h 45m

$713

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 7/29

6:10 am-11:15 pm

2 stops34h 05m

Sofia

Wed 8/19

6:20 am-12:59 am

2 stops25h 39m

$716

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 10/14

10:05 am-10:20 am

2 stops17h 15m

Sofia

Wed 10/28

6:00 am-10:56 pm

2 stops22h 56m

$720

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sat 8/8

4:20 pm-6:40 pm

2 stops43h 20m

Sofia

Mon 8/24

7:00 pm-4:05 pm

1 stop28h 05m

$723

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sat 8/8

4:20 pm-6:40 pm

2 stops43h 20m

Sofia

Mon 8/24

6:55 pm-4:05 pm

2 stops28h 10m

$724

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 1/4

3:20 pm-1:15 pm

2 stops14h 55m

Sofia

Wed 1/27

7:00 pm-4:05 pm

1 stop28h 05m

$726

Quickest round-trip

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 9/13

7:40 pm-6:40 pm

2 stops16h 00m

Sofia

Tue 9/29

6:10 am-4:05 pm

1 stop16h 55m

$736

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

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Philadelphia is in October. Flight prices, which tend to average around $518, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Sofia from Philadelphia during November instead. Flights to Sofia in November, while not as cheap as those in October, still average around $540.

Can stopping save me money on Philadelphia to Sofia flights?

You could potentially save up to 46% 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 45m
Direct flights	None

The fastest flight from Philadelphia to Sofia takes 14h 45m

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

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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 45m.
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 July 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 68% of the total bookings. Other popular airlines include United Airlines with 32%.

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 8,125 reviews		Search Lufthansa flights
United Airlines	PriceFrom $540	Free Cancellation	Rating 7.4 9,951 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.