$475 Find Cheap Flights from Philadelphia to Bulgaria

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Bulgaria departing on 9/8. 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

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Best Bulgaria Flight Deals from Philadelphia

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Sofia
Sofia1 stop$603
Varna
Varna2 stops$977
Sofia
Sofia1 stop$603
Varna
Varna2 stops$977

Cheap Flights from Philadelphia to Bulgaria

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Bulgaria 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 Philadelphia to Bulgaria

Tue, Nov 18 - Tue, Nov 25
Lufthansa Logo
5:35 pm - 6:15 pmPHL-SOF
17h 40m1 stop
Lufthansa Logo
6:00 am - 4:00 pmSOF-PHL
17h 00m1 stop
$603Lufthansa
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Tue, Nov 18 - Tue, Nov 25
Air Canada Logo
3:30 pm - 1:50 pmPHL-SOF
15h 20m2 stops
Air Canada Logo
6:00 am - 2:50 pmSOF-PHL
15h 50m2 stops
$604Air Canada
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Tue, Aug 12 - Thu, Aug 28
 Logo
3:20 pm - 1:20 pmPHL-SOF
15h 00m2 stops
 Logo
6:15 am - 10:07 pmSOF-PHL
22h 52m2 stops
Tue, Aug 12 - Thu, Aug 28
 Logo
5:35 pm - 1:20 pmPHL-SOF
12h 45m1 stop
 Logo
6:15 am - 10:07 pmSOF-PHL
22h 52m2 stops
Tue, Aug 12 - Thu, Aug 28
SWISS Logo
8:15 am - 10:05 amPHL-SOF
18h 50m2 stops
SWISS Logo
12:45 pm - 5:21 pmSOF-PHL
35h 36m3 stops
$721SWISS
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Thu, Aug 14 - Thu, Aug 28
SWISS Logo
8:15 am - 10:05 amPHL-SOF
42h 50m2 stops
SWISS Logo
12:45 pm - 5:21 pmSOF-PHL
35h 36m3 stops
$771SWISS
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Thu, Jul 31 - Sun, Aug 10
United Airlines Logo
9:20 am - 1:05 pmPHL-SOF
20h 45m2 stops
United Airlines Logo
8:00 am - 9:55 amSOF-PHL
32h 55m2 stops
$1,020United Airlines
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Thu, Jul 31 - Sat, Aug 9
United Airlines Logo
3:20 pm - 10:50 pmPHL-SOF
24h 30m2 stops
United Airlines Logo
12:45 pm - 2:08 pmSOF-PHL
32h 23m2 stops
$1,021United Airlines
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Sat, Aug 2 - Mon, Aug 11
British Airways Logo
6:35 pm - 8:20 pmPHL-SOF
18h 45m1 stop
British Airways Logo
8:00 pm - 4:25 pmSOF-PHL
27h 25m1 stop
$1,164British Airways
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Fri, Aug 1 - Mon, Aug 11
British Airways Logo
6:50 pm - 8:20 pmPHL-SOF
42h 30m2 stops
British Airways Logo
8:00 pm - 4:25 pmSOF-PHL
27h 25m1 stop
$1,386British Airways
Find Deal
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KAYAK's insights & trends for Philadelphia to Bulgaria flights

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

What is the cheapest month to fly from Philadelphia to Bulgaria?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Bulgaria, 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 from Philadelphia to Bulgaria is February, when tickets cost $560 (return) on average. On the other hand, the most expensive months are May and June, when the average cost of round-trip tickets is $1,255 and $1,114 respectively.

What’s the cheapest day of the week to fly from Philadelphia to Bulgaria?

The average price of all round-trip flights from Philadelphia to Bulgaria clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Philadelphia to Bulgaria, look for departures on Tuesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Bulgaria, Wednesday is the cheapest day to fly and Thursday is the most expensive.


Good to know

Low seasonFebruary
High seasonAugust
Cheapest flight$475
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Philadelphia to Sofia

FAQs - booking Bulgaria flights

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

    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 from Philadelphia to Bulgaria.

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

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

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

    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 from Philadelphia to Bulgaria 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 from Philadelphia to Bulgaria?

    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 from Philadelphia to Bulgaria 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 Bulgaria?

    The cheapest time of day to fly to Bulgaria is generally at night, when round-trip flights cost $838 on average. Morning departures are around 16% more expensive than evening flights, on average. The most expensive time of day to fly to Bulgaria is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,318.

Top 3 airlines serving from Philadelphia to Bulgaria

 
Need help choosing which airline to fly with from Philadelphia to Bulgaria? 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 8801 reviews
7.3Comfort
6.6Food
8.1Crew
7.0Entertainment
7.7Boarding
Airline reviews

Gate agent did not hold flight for connection, provided no assistance to get new flight

2.0 MediocreJack, Jun 2025SAT - IAH
Read more United Airlines reviews

Gate agent did not hold flight for connection, provided no assistance to get new flight

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

United airlines, mediocre at best. No issues , nothing great . Worked for me

Boarding experience was smooth. Flight attendants were friendly and helpful. Entertainment system on the Houston-Edmonton flight did not function for passengers on the left side of the aisle. On the bird's eye flight from Quito to Houston, they should not serve a meal. No one needs to eat after midnight and it is disturbing for those passengers trying to sleep.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Terrible. Out flight was delayed for 21 (twenty one) hours. United is a joke.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Flight was 1.5 hours late to depart so changed flights to Swiss Air.

The United Airlines crew that operated this flight was subpar. They didn’t

Very small and uncomfortable seats, Hard to hear entertainment system sound. Horrible food. Staff doesn't care much about the passengers. 2nd time they didn't give me my vegetarian meal. They asked me regular food with meat. The airline and staff was from United airlines.

Checkin took along timen only.few angents available at.checkin desk. Customer support over phone no existence

At baggage claim, I was given the wrong printed ticket. The ticket belonged to another passenger for a different flight — to Zurich instead of Frankfurt (layover). I was even allowed to pass security, and when I asked the Lufthansa employee if I was on the correct flight, and why it was changed. The employee said everything was correct and I should board. When I got on the plane, there was someone in my seat, and the crew on the plane finally realized that I was on the wrong plane. When I got off the plane, nobody was willing to help, and the security refused to provide my original printed ticket. That was until I showed them that I took a photo of the ticket; once they realized I had photographic evidence, they were suddenly ready to help me. The Lufthansa employee began communicating with other airlines and found a flight that would take me to my destination via Polish Airlines. I was required to once again go through security, re-check my bag, and once again pay for my checked bag and weight overage fees. This experience was incredibly stressful and very frustrating, as you can imagine. A Lufthansa employee told me I would be eligible for a refund. Please tell me what steps I need to take in order to make that happen. Thank you!

The row of seats were so cramped it was difficult to get in and out of your seat. I even upgraded. A long flight and sad accommodations 😵‍💫 the shorter flight was very comfortable and the seating was spacious

I bought a ticket and paid for for our luggage but I had to pay for my luggage again. I’m so disappointed! We had a 30 min delay and because of that we missed our connecting flight and were told that we would be on the next flight (9am flight ) but we were landed we were booked at 12pm flight. I had a little baby w me, it was very stressful. I begged to leave at 10 am at least. I was emailed that we get a voucher but they didn’t work when we were at a breakfast store. I’ve been always happy w Lufthansa but this time was awful.

Good service … bus transfer upon arrival from plane to terminal: atrocious!!!

helpful and friendly. The Lufthanza people I dealt with before my holiday were so unhelpful by comparison.

We had a 1 1/2 hour delay before we left Denver. When we arrive to Frankfort, they didn’t announce that people with connecting flights to exit the plane first. My next flight was already boarding when we we taxiing in to the gate. I waited another 10 minutes to get off the plane. I had to run to catch my next flight. I mean run! I made it with one minute to spare, but my luggage did not. My luggage came two hours later on a different flight.

This was the second time on BA, food terrible, bathrooms gross,( granted, that was mostly due to the disgusting children urinating all over it)boarding was late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress. Seats were painful, that's what you get for traveling like a poor in economy, right BA? Should have been able to afford business or first class if you want to actually be able to walk upright without back pain after a trip.

This was the second time on BA, food terrible, bathrooms gross, boarding late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress.

The flight was delayed twice and because of that, we missed our connecting flight. British Airways then attempted to put us on the last flight to Milan from London which would have kept us in the airport for 12 hours. We had to speak to several levels of bureaucracy until BA management let us fly on a flight that only kept us in the airport for two hours. If there was an earlier flight, why weren’t we put on that flight from the start? Unacceptable behavior from what was once my favorite carrier.

The payment system was not working so was unable to connect wifi the entire flight

everything to do with KAYAK was terrible. Your customer facing departments are utterly useless, timewasting and unhelpful.

I ordered short ribs for main course. It tasted sweet, really sweet. Horrible.

Our luggage didn’t arrive with us, that puts a damper on the whole trip.

The screen didn’t work and I didn’t get the seat upgrade I paid $300 for. They were no help with that,

Paid $180 for seat selection, and selection essnt honored. Have to call for a refund.

Was 3 hrs delayed and my poor friend I met in Barcelona was waiting at airport for 3 hrs. Dallas airport was awful

Everything you need to know for your flight from Philadelphia to Bulgaria

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