SOF - PHL

$378 Find Cheap Flights from Sofia to Philadelphia - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$784
Typical prices: $800-$977
British Airways
Tue 11/6Sat 11/10
SOF - PHL • 1 stop
Cheapest one-way
$378
Typical prices: $649-$695
Multiple Airlines
Wed 11/7
SOF - PHL • 3 stops
Nonstop flights
Not available
There are currently no direct flights between Sofia and Philadelphia. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
September
Cheapest • 36% price drop
September
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Frankfurt am Main (FRA)
Cheapest • Avg $888 (round-trip)
Amsterdam Schiphol (AMS)
Shortest trip • 12h 47m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from Sofia to Philadelphia (SOF-PHL)

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

Recent round-trip flight deals from Sofia to Philadelphia

Fri, Nov 6 - Tue, Nov 10
British Airways Logo
8:30 pm - 4:15 pmSOF  Sofia-PHL Philadelphia
26h 45m1 stop London Heathrow
British Airways Logo
6:35 pm - 8:10 pmPHL  Philadelphia-SOF Sofia
18h 35m1 stop London Heathrow
$784British Airways
Fri, Nov 6 - Thu, Nov 12
British Airways Logo
8:30 pm - 4:15 pmSOF  Sofia-PHL Philadelphia
26h 45m1 stop London Heathrow
British Airways Logo
7:40 pm - 7:20 pmPHL  Philadelphia-SOF Sofia
16h 40m1 stop London Heathrow
$784British Airways
Wed, Nov 4 - Sat, Nov 7
British Airways Logo
9:05 pm - 4:15 pmSOF  Sofia-PHL Philadelphia
26h 10m1 stop London Heathrow
British Airways Logo
7:28 pm - 4:20 pmPHL  Philadelphia-SOF Sofia
37h 52m2 stops Boston Logan Intl London Heathrow
$784British Airways
Wed, Nov 4 - Sun, Nov 8
British Airways Logo
9:05 pm - 4:15 pmSOF  Sofia-PHL Philadelphia
26h 10m1 stop London Heathrow
British Airways Logo
6:35 pm - 4:20 pmPHL  Philadelphia-SOF Sofia
14h 45m1 stop London Heathrow
$784British Airways
Thu, Oct 29 - Thu, Nov 5
Lufthansa Logo
6:25 am - 5:05 pmSOF  Sofia-PHL Philadelphia
16h 40m1 stop Frankfurt am Main
Lufthansa Logo
5:40 pm - 6:10 pmPHL  Philadelphia-SOF Sofia
17h 30m1 stop Frankfurt am Main
$804Lufthansa
Thu, Nov 5 - Wed, Nov 11
United Airlines Logo
6:25 am - 4:05 pmSOF  Sofia-PHL Philadelphia
16h 40m1 stop Frankfurt am Main
United Airlines Logo
10:30 am - 1:15 pmPHL  Philadelphia-SOF Sofia
19h 45m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss
$806United Airlines
Thu, Nov 5 - Thu, Nov 12
Lufthansa Logo
6:25 am - 4:05 pmSOF  Sofia-PHL Philadelphia
16h 40m1 stop Frankfurt am Main
Lufthansa Logo
5:40 pm - 1:25 pmPHL  Philadelphia-SOF Sofia
12h 45m1 stop Frankfurt am Main
$807Lufthansa
Thu, Nov 5 - Thu, Nov 12
United Airlines Logo
6:25 am - 4:05 pmSOF  Sofia-PHL Philadelphia
16h 40m1 stop Frankfurt am Main
United Airlines Logo
3:05 pm - 1:25 pmPHL  Philadelphia-SOF Sofia
15h 20m2 stops Washington, D.C. Dulles Intl Frankfurt am Main
$807United Airlines
Thu, Oct 1 - Wed, Oct 7
Lufthansa Logo
6:30 am - 4:05 pmSOF  Sofia-PHL Philadelphia
16h 35m1 stop Frankfurt am Main
Lufthansa Logo
5:40 pm - 6:05 pmPHL  Philadelphia-SOF Sofia
17h 25m1 stop Frankfurt am Main
$807Lufthansa
Thu, Nov 5 - Fri, Nov 13
United Airlines Logo
6:25 am - 4:05 pmSOF  Sofia-PHL Philadelphia
16h 40m1 stop Frankfurt am Main
United Airlines Logo
3:20 pm - 1:25 pmPHL  Philadelphia-SOF Sofia
15h 05m2 stops Montreal Pierre Elliott Trudeau Intl Frankfurt am Main
$810United Airlines
Booking Insights

Price, demand and travel trends for Sofia to Philadelphia flights

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

How much is a round-trip flight from Sofia to Philadelphia?

Round-trip flights from Sofia to Philadelphia start at $784. Prices are below average for this route right now, with typical round-trip fares ranging from $800 to $977. The lowest price found in the past 5 days was $784 on British Airways.

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Key details for Sofia to Philadelphia flights

Low season

March

Cheapest flight

$378
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly and prices are also 36% lower on average.
Flight from Sofia to Philadelphia

When to book flights from Sofia to Philadelphia

Are your dates flexible? Find out the best times to travel from Sofia to Philadelphia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Sofia to Philadelphia flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Sofia to Philadelphia?

    Flights from Sofia to Philadelphia usually depart from Sofia (SOF) and arrive at Philadelphia (PHL).

  • What cabin classes can I book on flights from Sofia to Philadelphia?

    Two cabin classes are available on flights from Sofia to Philadelphia:

    • Economy Class
    • Business Class

  • Which airports do connecting flights from Sofia to Philadelphia pass through?

    Connecting flights from Sofia to Philadelphia most commonly pass through:

    • Frankfurt am Main (FRA) - 84% of one-stop connections
    • Amsterdam Schiphol (AMS) - 16% of one-stop connections
    Together, these airports account for 100% of one-stop bookings on this route.

  • Can I save money by using flexible dates for flights from Sofia to Philadelphia?

    Yes. Being flexible with your travel dates can save you up to 25% on the Sofia to Philadelphia route. Friday is the cheapest departure day at $925 round-trip on average, while Thursday is the most expensive at $1,223, a difference of $298. 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 Philadelphia?

    Some of the most popular sights in Philadelphia are Philadelphia Convention Center, Rittenhouse Square and Philadelphia Stadium. These are among the most viewed places in Philadelphia on KAYAK.

  • How long is a flight from Sofia to Philadelphia?

    A nonstop flight from Sofia to Philadelphia takes 0h 00m, covering 4,800 miles.

  • Do I need a passport to fly from Sofia to Philadelphia?

    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 Sofia to Philadelphia 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 $784 to $5,562. That means the highest observed fare was about 7x higher than the lowest one.

  • How are flight prices from Sofia to Philadelphia looking right now?

    One-way fares from Sofia to Philadelphia are currently lower than usual. Average one-way flight prices are about $605, which is 10% below the typical average for this route.

  • How much time can I save by choosing a different layover airport from Sofia to Philadelphia?

    Flying via Amsterdam Schiphol (AMS) gives the shortest average 1-stop total travel time at 12h 47m, compared with 15h 39m via Frankfurt am Main (FRA).

  • What is the time difference between Sofia and Philadelphia?

    Philadelphia is 7 hours behind Sofia (Eastern Time vs Eastern European Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Philadelphia Airport (PHL)?

    Philadelphia Airport (PHL) hosts 5 major car rental companies, with daily rates starting from around $28 for economy cars. Top options include:
    • Payless
    • Dollar
    • Hertz
    • Thrifty
    • Budget

  • How much should I expect to pay for a Sofia to Philadelphia flight?

    Round-trip flights from Sofia to Philadelphia range from $800 to $977, with an average of $934 over the past 12 months. Anything below $800 counts as a good deal.

Your guide to booking Sofia to Philadelphia flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Friday departure instead of Thursday. On this route, Friday flights average $925 - about $298 less than Thursday (24% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Sofia to Philadelphia trip for September. Fares historically average $602 round-trip in that month - typically $623 less than the most expensive month, which is May (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Philadelphia Airport.
    - Embassy Suites by Hilton Philadelphia Airport
    - DoubleTree by Hilton Philadelphia Airport
    - Microtel Inn & Suites by Wyndham Philadelphia Airport

More options for your flight from Sofia to Philadelphia

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

Car rentals in Philadelphia
Hotels in Philadelphia
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