$678 Find Cheap Flights from Bulgaria to Philadelphia

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight to Philadelphia departing on 12/24. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Philadelphia

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Philadelphia, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Philadelphia, as well as popular online travel agencies
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Cheap Flights from Bulgaria to Philadelphia

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Bulgaria to Philadelphia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Bulgaria to Philadelphia

Wed, Dec 24 - Sun, Jan 4
United Airlines Logo
6:10 am - 9:31 pmSOF-PHL
22h 21m2 stops
United Airlines Logo
6:00 am - 11:50 amPHL-SOF
22h 50m2 stops
$678United Airlines
Find Deal
Tue, Dec 23 - Sun, Jan 4
United Airlines Logo
6:00 am - 2:07 pmSOF-PHL
39h 07m2 stops
United Airlines Logo
6:10 am - 10:45 pmPHL-SOF
33h 35m2 stops
$686United Airlines
Find Deal
Wed, Dec 24 - Sun, Jan 4
British Airways Logo
9:00 pm - 4:15 pmSOF-PHL
26h 15m1 stop
British Airways Logo
7:45 pm - 4:20 pmPHL-SOF
13h 35m1 stop
$846British Airways
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Wed, Dec 24 - Sun, Jan 4
British Airways Logo
9:00 pm - 4:15 pmSOF-PHL
26h 15m1 stop
British Airways Logo
7:45 pm - 4:20 pmPHL-SOF
13h 35m1 stop
$848British Airways
Find Deal
Tue, Dec 23 - Sun, Jan 4
Lufthansa Logo
6:00 am - 4:05 pmSOF-PHL
17h 05m1 stop
Lufthansa Logo
5:40 pm - 10:45 pmPHL-SOF
22h 05m1 stop
$881Lufthansa
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Tue, Dec 23 - Sun, Jan 4
Lufthansa Logo
6:00 am - 4:05 pmSOF-PHL
17h 05m1 stop
Lufthansa Logo
5:40 pm - 10:45 pmPHL-SOF
22h 05m1 stop
$883Lufthansa
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Wed, Dec 24 - Sun, Jan 4
Multiple Airlines Logo
2:25 pm - 2:50 pmSOF-PHL
31h 25m3 stops
Multiple Airlines Logo
7:50 am - 10:45 pmPHL-SOF
31h 55m2 stops
$899Multiple Airlines
Find Deal
Wed, Dec 24 - Sun, Jan 4
Multiple Airlines Logo
2:25 pm - 2:50 pmSOF-PHL
31h 25m3 stops
Multiple Airlines Logo
3:30 pm - 6:20 pmPHL-SOF
19h 50m2 stops
$1,009Multiple Airlines
Find Deal
Wed, Dec 24 - Sun, Jan 4
Air Canada Logo
2:25 pm - 2:50 pmSOF-PHL
31h 25m3 stops
Air Canada Logo
3:30 pm - 6:20 pmPHL-SOF
19h 50m2 stops
$1,012Air Canada
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Fri, Dec 5 - Sat, Dec 13
Air Canada Logo
6:10 am - 10:46 pmSOF-PHL
23h 36m3 stops
Air Canada Logo
3:30 pm - 1:15 pmPHL-SOF
14h 45m2 stops
$1,122Air Canada
Find Deal

Everything you should know

When to travel
March
Cheapest • 21% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$678
Overall average: $728
United Airlines
Wed 12/24Sun 1/4
SOF - PHL • 2 stops
Cheapest one-way
Multiple Airlines
Sun 11/2
SOF - PHL • multi-stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Philadelphia!
Booking Insights

KAYAK's insights & trends for flights to Philadelphia

Get data-powered insights and trends for flights to Philadelphia to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly to Philadelphia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Philadelphia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to Philadelphia is March, where tickets cost $581 on average for one-way flights. On the other hand, the most expensive months are November and July, where the average cost of tickets from Bulgaria is $986 and $814 respectively. For return trips, the best month to travel is March with an average price of $581.

Good to know

Low seasonSeptember
Cheapest flight$678
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from Sofia to Philadelphia

FAQs - booking Philadelphia flights

  • How far is Philadelphia Airport from central Philadelphia?

    The city center of Philadelphia is 7 miles from Philadelphia Airport.

  • What is the name of Philadelphia’s airport?

    There is only 1 airport in Philadelphia, called Philadelphia Airport (PHL). It can also be referred to as Philadelphia or Philadelphia Intl.

  • What is the cheapest day to fly to Philadelphia?

    Based on KAYAK data, the cheapest day to fly to Philadelphia is Wednesday where tickets can be as cheap as $579. On the other hand, the most expensive day to fly is Thursday, where prices are $986 on average.

  • How does KAYAK find such low prices on flights to Philadelphia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Philadelphia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Philadelphia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Philadelphia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Philadelphia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Philadelphia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Philadelphia?

    The cheapest time of day to fly to Philadelphia is generally at night, when flights cost $651 on average. The most expensive time of day to fly to Philadelphia is generally in the morning, which is peak travel time and where the average cost of a ticket is $742.

  • How many direct flights to Philadelphia are there each week?

    Each week there are around 3,295 direct flights from within Bulgaria to Philadelphia. The most common day for departures is Wednesday, with 15% of flights taking off on this day.

Top tips for finding cheap flights to Philadelphia

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Philadelphia flight deals.

Reviews of the top airlines flying from Bulgaria to Philadelphia

 
See real verified KAYAK customer reviews for airlines flying to Philadelphia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Bulgaria to Philadelphia. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Philadelphia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8997 reviews
7.7Boarding
7.1Entertainment
8.1Crew
6.6Food
7.3Comfort
Airline reviews

7 hours delayed due to operational issues on United’s end. Basically laziness.

2.0 MediocreGray, Nov 2025IAD - SFO
Read more United Airlines reviews

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

Not enough veg food available for passengers. I actually did not get the veg food and was told it was over, and I starved the entire flight duration.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Flight left on time. Boarding was easy. Arrived to EWR 30 mins early. Luggage was deplaned in good time. Overall a very good experience.

Flight from Rome to SFO was excellent compared To our flight to Europe from SFO. The food was much tastier. You can see how UNITED is skimping, though. Instead of getting something mid flight you had to ask for it. It was not automatically served. There was a cookie at the end of the arrival meal, for example that tasted like it just came out of a box. They used to serve a little container of nuts, now … a tiny container of nuts, mixed with pretzels. This was business class that you really have to pay for! But this is minor complaints compared to the overall. My major complaint is the position of the even numbered seats by the windows. You have to turn around to see your window & the positioning as some other controls are harder to get at. This is compared to the odd number seat that are perfectly aligned.

The person I bought the ticket for didn’t make the flight.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

Give yourself over 2+ hours layover because if flight is slighlty delayed and you miss your connection, Lufthansa will do nothing for you

We would have missed our connection from Munich to Boston but we had a van outside the plan that wisked us to our terminal. Much appreciated and we didn’t even realize that Lufthansa had done this until the announcement on disembarkation. Well organized airline! Will definitely fly Lufthansa again!!!

Everything went well. I will fly with Lufthansa again. And use Kayak whenever I book flights

Bought a seat in a flight that got changed out so ended up paying for a seat I would have had if I hadn't paid.

Food was poor quality and the screens for entertainment didn’t work properly

Food was much better than my outbound flight. On-time. Good service. I had a problem with my entertainment screen, but the attendant fixed it promptly.

I think they overbooked Frankfurt to New York and bumped me off. This changed my return travel I arrived home about 4 hours late. Almost 24 total travel time Totally unacceptable Would not travel with United

United lost my travel information and canceled my original flight. I had a seat assignment but was refused the booking. I had to prove that I went to Germany on United Very concerned about security that no one recorded my passport from Cleveland to NY and NY to Frankfurt I arrived at home at 12:30am on Saturday instead of 8pm I expect a full refund from United Please provide information to assure compensation

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood Crest
Newark
North Wildwood
Vineland
West Chester
Essington
Elkton
Pottstown
Willow Grove
Kennett Square
Somers Point
Voorhees
Middletown
Wyomissing
Glen Mills
Phoenixville
Bird in Hand
Blackwood
Millville
Strasburg

Everything you need to know for your flight to Philadelphia

Information on the airport you'll fly into in Philadelphia

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