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Flights from Philadelphia to Sofia

What to know about flights from Philadelphia to Sofia?

The distance between Philadelphia and Sofia is approximately 7,728.8 km. Based on Trip.com's data, travel demand peaks in August.

Cheapest one-way
BRL 2,464
United Airlines United Airlines PHL-SOF 17h 20m · 1 stop Tue, Sep 15
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Cheapest round-trip
BRL 3,938
Lufthansa Lufthansa PHL-SOF 17h 25m · 2 stops Thu, Oct 8 - Thu, Oct 15
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Recommended airlines
United Airlines United Airlines Cheapest · From BRL 2,464 Lufthansa Lufthansa Most booked
When to travel
December
Cheapest
August
Peak season for travel
Route details
7,728.8 km
Flight distance

Explore the cheapest one-way and round-trip flights from Philadelphia to Sofia over the next 90 days, with one-way fares from BRL 2,464 and round-trip from BRL 3,938. Based on Trip.com's latest 7-day flight data.

      • PHL 5:40 PM
        17h 25m
        1 stop
        SOF 6:05 PM
        Philadelphia - Sofia | Thu, Oct 8 | Lufthansa
        SOF 6:20 AM
        16h 45m
        1 stop
        PHL 4:05 PM
        Sofia - Philadelphia | Thu, Oct 15 | Lufthansa
        BRL 3,938 BRL 5,635
        30% off
        30% off
        BRL 5,635 BRL 3,938
      • PHL 5:40 PM
        17h 25m
        1 stop
        SOF 6:05 PM
        Philadelphia - Sofia | Thu, Oct 8 | United Airlines
        SOF 6:20 AM
        16h 45m
        1 stop
        PHL 4:05 PM
        Sofia - Philadelphia | Thu, Oct 15 | United Airlines
        BRL 3,938 BRL 5,635
        30% off
        30% off
        BRL 5,635 BRL 3,938
      • PHL 5:40 PM
        12h 25m
        1 stop
        SOF 1:05 PM
        Philadelphia - Sofia | Wed, Oct 7 | United Airlines
        SOF 6:10 AM
        16h 55m
        1 stop
        PHL 4:05 PM
        Sofia - Philadelphia | Wed, Oct 14 | Lufthansa
        BRL 4,096 BRL 5,635
        27% off
        27% off
        BRL 5,635 BRL 4,096
      • PHL 5:40 PM
        17h 25m
        1 stop
        SOF 6:05 PM
        Philadelphia - Sofia | Thu, Oct 1 | United Airlines
        SOF 6:20 AM
        16h 45m
        1 stop
        PHL 4:05 PM
        Sofia - Philadelphia | Thu, Oct 8 | United Airlines
        BRL 4,099
        27% off
        BRL 5,635 BRL 4,099
      • PHL 5:40 PM
        17h 20m
        1 stop
        SOF 6:00 PM
        Philadelphia - Sofia | Wed, Oct 7 | Lufthansa
        SOF 6:10 AM
        16h 55m
        1 stop
        PHL 4:05 PM
        Sofia - Philadelphia | Wed, Oct 14 | United Airlines
        BRL 4,109
        27% off
        BRL 5,635 BRL 4,109
      • PHL 5:40 PM
        17h 20m
        1 stop
        SOF 6:00 PM
        Philadelphia - Sofia | Tue, Sep 29 | United Airlines
        SOF 2:20 PM
        32h 45m
        1 stop
        PHL 4:05 PM
        Sofia - Philadelphia | Tue, Oct 6 | Lufthansa
        BRL 4,223
        25% off
        BRL 5,635 BRL 4,223
      • PHL 5:40 PM
        12h 45m
        1 stop
        SOF 1:25 PM
        Philadelphia - Sofia | Tue, Oct 6 | Lufthansa
        SOF 2:20 PM
        32h 45m
        1 stop
        PHL 4:05 PM
        Sofia - Philadelphia | Tue, Oct 13 | Lufthansa
        BRL 4,341
        23% off
        BRL 5,635 BRL 4,341
      • PHL 5:40 PM
        17h 30m
        1 stop
        SOF 6:10 PM
        Philadelphia - Sofia | Mon, Sep 7 | United Airlines
        SOF 1:50 PM
        33h 15m
        1 stop
        PHL 4:05 PM
        Sofia - Philadelphia | Mon, Sep 14 | United Airlines
        BRL 4,345
        23% off
        BRL 5,635 BRL 4,345
      • PHL 5:40 PM
        22h
        1 stop
        SOF 10:40 PM
        Philadelphia - Sofia | Tue, Sep 29 | Lufthansa
        SOF 2:20 PM
        32h 45m
        1 stop
        PHL 4:05 PM
        Sofia - Philadelphia | Tue, Oct 6 | Lufthansa
        BRL 4,351
        23% off
        BRL 5,635 BRL 4,351
      • PHL 5:40 PM
        17h 25m
        1 stop
        SOF 6:05 PM
        Philadelphia - Sofia | Thu, Sep 24 | United Airlines
        SOF 6:20 AM
        16h 45m
        1 stop
        PHL 4:05 PM
        Sofia - Philadelphia | Thu, Oct 1 | United Airlines
        BRL 4,508
        20% off
        BRL 5,635 BRL 4,508
      • PHL 1:00 PM
        17h 25m
        1 stop
        SOF 2:00 PM
        Philadelphia - Sofia | Fri, Aug 28 | Normal Airline
        SOF 3:00 PM
        6h
        Nonstop
        PHL 4:00 PM
        Sofia - Philadelphia | Sun, Aug 30 | Normal Airline
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      • PHL 5:40 PM
        17h 20m
        1 stop
        SOF 6:00 PM
        Philadelphia - Sofia | Tue, Sep 15 | United Airlines
        BRL 2,464 BRL 3,512
        30% off
        30% off
        BRL 3,512 BRL 2,464
      • PHL 6:45 PM
        17h 35m
        1 stop
        SOF 7:20 PM
        Philadelphia - Sofia | Mon, Sep 14 | British Airways
        BRL 2,485 BRL 3,512
        28% off
        28% off
        BRL 3,512 BRL 2,485
      • PHL 6:45 PM
        17h 35m
        1 stop
        SOF 7:20 PM
        Philadelphia - Sofia | Mon, Sep 21 | British Airways
        BRL 2,488 BRL 3,512
        28% off
        28% off
        BRL 3,512 BRL 2,488
      • PHL 5:40 PM
        17h 20m
        1 stop
        SOF 6:00 PM
        Philadelphia - Sofia | Tue, Sep 15 | Lufthansa
        BRL 2,532
        28% off
        BRL 3,512 BRL 2,532
      • PHL 5:40 PM
        17h 30m
        1 stop
        SOF 6:10 PM
        Philadelphia - Sofia | Mon, Sep 21 | United Airlines
        BRL 2,547
        27% off
        BRL 3,512 BRL 2,547
      • PHL 6:45 PM
        18h 25m
        1 stop
        SOF 8:10 PM
        Philadelphia - Sofia | Sun, Oct 11 | British Airways
        BRL 2,759
        21% off
        BRL 3,512 BRL 2,759
      • PHL 5:40 PM
        17h 30m
        1 stop
        SOF 6:10 PM
        Philadelphia - Sofia | Mon, Sep 21 | Lufthansa
        BRL 2,774
        21% off
        BRL 3,512 BRL 2,774
      • PHL 5:40 PM
        17h 30m
        1 stop
        SOF 6:10 PM
        Philadelphia - Sofia | Mon, Sep 14 | United Airlines
        BRL 2,798
        20% off
        BRL 3,512 BRL 2,798
      • PHL 5:40 PM
        12h 35m
        1 stop
        SOF 1:15 PM
        Philadelphia - Sofia | Sat, Sep 12 | United Airlines
        BRL 2,808
        20% off
        BRL 3,512 BRL 2,808
      • PHL 6:45 PM
        11h 40m
        1 stop
        SOF 1:25 PM
        Philadelphia - Sofia | Fri, Sep 11 | British Airways
        BRL 2,809
        20% off
        BRL 3,512 BRL 2,809
      • PHL 1:00 PM
        17h 25m
        1 stop
        SOF 2:00 PM
        Philadelphia - Sofia | Fri, Aug 28 | Normal Airline
        Find more flights
        Find more flights

Which airlines are the most popular for Philadelphia to Sofia flights?

You can choose from 2 airlines that fly from Philadelphia to Sofia, including Lufthansa, American Airlines, United Airlines has lowest fares on this route.
Lufthansa logo Lufthansa
American Airlines logo American Airlines
Airlines are determined based on actual purchased flight tickets from Philadelphia to Sofia according to previous 12 months data from Trip.com.

Frequently Asked Questions

  • What are the cheapest flights from Philadelphia to Sofia (PHL-SOF)?

    Based on Trip.com data, United Airlines offers one-way fares as low as BRL 2,464 on Cheapest nonstop routes (e.g. PHL to SOF on Tue, Sep 15), while Lufthansa offers Cheapest nonstop round-trips from BRL 3,938 departing on Thu, Oct 8 and returning on Thu, Oct 15.
  • At the moment, several airlines serve connecting flights from Philadelphia to Sofia, including: American Airlines Lufthansa Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Philadelphia to Sofia is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Philadelphia to Sofia, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Sep 15, with one-way flights priced at just BRL 2,464.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is United Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Sofia travel is around August.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Philadelphia to Sofia is December, when demand for travel is lower.
  • After crunching the numbers on our August flight calendar, it's currently cheapest to fly from Philadelphia to Sofia on August 27, 2026 with Lufthansa, with prices starting at BRL 4,248.
  • You can arrive at any of the following airports in Sofia: Sofia Airport (SOF). Flights from Philadelphia International Airport to Sofia Airport (PHL-SOF) are by far the most popular option for this route.
  • The time difference between Sofia and Philadelphia is 7h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.
  • Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Philadelphia to Sofia is BRL 3,062. Fares vary by travel date, airline and availability.
  • Enter Philadelphia and Sofia, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

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Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.