Cheap flights from Philadelphia International to Sofia

Compare Philadelphia International to Sofia flight deals

Find the cheapest month or even day of the year to fly to Sofia

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Find the cheapest month to fly from Philadelphia International to Sofia

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia International to Sofia flights are currently cheapest in July.

Philadelphia International to Sofia: Alternative routes

Compare routes from Philadelphia International to Sofia below. You may find an airport to fly into that's cheaper, faster, or easier than Sofia.

Philadelphia to Sofia: Flight information

The things to know before you go.
Cheapest flight found$502
Cheapest month to flyJuly

Finding cheap flights from Philadelphia International to Sofia: Frequently asked questions

The best price we found for a return flight from Philadelphia International to Sofia is $936. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Philadelphia International to Sofia. But we found flights with one or more stops from $936.
As of May 2026, there are no flights flying from Philadelphia International to Sofia.
The cheapest month to fly from Philadelphia International to Sofia is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to Sofia Airport on Sunday, 11 April 2027.
No airlines currently offer direct flights between Philadelphia International Airport and Sofia Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Sofia but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Sofia is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Lufthansa offers the cheapest flight tickets to Sofia.

Flying from Philadelphia International Airport (PHL) to Sofia Airport (SOF): what you need to know

  • Sofia is six hours ahead of Philadelphia and follows the UTC+2 timezone.

  • Arrive at the airport on time so you don't miss your PHL to SOF flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to prevent a last-minute sprint to your gate.

  • During popular months like August, it's a good idea to get to the airport earlier than usual. Plan to arrive two hours before domestic departures and four hours ahead of an international flight when you fly during a peak period in general.

  • If you want to break up your flight, simply deselect 'Direct flights only' when searching for your ticket from Philadelphia International Airport to Sofia Airport. These are the most popular stopovers between PHL and SOF:

    • Zurich Airport

    • Eleftherios Venizelos International Airport

    • London Heathrow Airport

How to find the cheapest flights from Philadelphia International Airport (PHL) to Sofia Airport (SOF)

  • The cheapest price we've seen for a one-way Philadelphia International Airport to Sofia Airport flight is $502. A round-trip fare right now is $936. Depending on the availability when you book, these fares can change.

  • It's a good idea to book ahead of time if you want to get cheap tickets from PHL to SOF. That's because flight prices are based on demand, which tends to increase closer to departure.

  • Getting cheap flights from Philadelphia International Airport to Sofia Airport is easier if you're flexible with your dates. Use the 'Whole month' tool to see the lowest prices across each month and bag a great deal.

  • Getting your hands on cheap flights from PHL to SOF is a breeze with Price Alerts. Simply create one of these automatic alerts and we'll get in touch as soon as a new discounted fare appears.

  • Tailor your trip with filters. Choose your ideal departure and arrival times, airlines and total journey duration. You can also sort results by 'Best,' 'Cheapest' or 'Fastest' flights from Philadelphia International Airport to Sofia Airport.

Handy information about Philadelphia International Airport (PHL)

  • PHL is located at Industrial Highway and Island Road.

  • Of the flights that depart from Philadelphia International Airport, 78.93% arrive on time at their destination.

  • Philadelphia International Airport is around 19 kilometres from central Philadelphia. If you're driving, catching a cab or ride-sharing from the centre, it'll take you 15 minutes or so to arrive, depending on the traffic.

  • Planning to catch public transport? Expect a journey time of around 45 minutes.

  • Get your break off to a stress-free start by staying near PHL. Whether you're taking an early flight from Philadelphia International Airport to Sofia Airport or just don't like being rushed, these hotels are perfect:

Arriving at Sofia Airport (SOF)

  • The last thing you want is a lengthy trip to your hotel if you're arriving on a late Philadelphia International Airport to Sofia Airport flight. Book one of these accommodation options near SOF instead:

  • Hit the road running by picking up a Sofia Airport rental car. Grab your wheels from MEX, Surprice or NU Car Rentals and explore beyond Sofia's main sights.

  • Lock in the best deal by booking your vehicle from Sofia Airport about one week in advance of your trip.

Getting from Sofia Airport (SOF) to central Sofia

  • Sofia Airport to the centre of Sofia has a drive time of about 15 minutes. It's approximately 11 kilometres away.

  • Getting there by public transport will take you roughly 35 minutes.

When to fly to Sofia Airport (SOF)

  • It's time to work out your travel dates for your flight from Philadelphia International Airport to Sofia Airport. August is the busiest month to head to Sofia. If you prefer a more low-key vibe, go in April.

  • The warmest month in Sofia is August, with the temperature ranging between 14ºC (57ºF) and 30ºC (86ºF). Book your flights from Philadelphia International Airport to Sofia Airport in this month if you like this kind of weather.

  • If you like travelling in cooler conditions, search for a cheap ticket from PHL to SOF in January. Average temperatures are between -11ºC (12ºF) and 7ºC (45ºF) then.

Explore more of Bulgaria

  • Sofia has loads to offer, but there are so many other parts of Bulgaria just waiting to be discovered. Around 129 kilometres south-east of Sofia, a visit to Plovdiv will keep you on the move. Start with attractions like Plovdiv Old Town, Plovdiv Roman Theatre and Archaelogical Complex Nebet Tepe.

  • Varna is another sought-after destination in Bulgaria and is around 386 kilometres east of Sofia. No trip is complete without experiencing Park Asparuhovo - Asparuhovo sea garden, Dormition of theotokos Cathedral and Sunset viewpoint (място за гледане на Залеза).

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.