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Cheap Flights from Philadelphia to the United Kingdom

Cheapest return flight prices found by our users on KAYAK in the last 5 days
Sort by: Cheapest
Manchester
9h 40m2 stops
from £488per person
Edinburgh
7h 00mNonstop
from £514per person
Glasgow
10h 15m2 stops
from £515per person
Inverness
10h 30m2 stops
from £522per person
Newcastle upon Tyne
11h 00m2 stops
from £560per person
Bristol
9h 15m3 stops
from £567per person
Birmingham
9h 10m2 stops
from £592per person
London
7h 05mNonstop
from £613per person
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Booking Insights

KAYAK's insights & trends for Philadelphia to the United Kingdom flights

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

What is the cheapest Philadelphia to the United Kingdom flight route?

The cheapest ticket to the United Kingdom from Philadelphia found in the last 5 days was to London, at £723 return. The most popular route is from Philadelphia (PHL) to London Heathrow Airport (LHR), and the cheapest return airline ticket found on this route in the last 5 days was £723.

What is the cheapest time of day to fly to the United Kingdom?

The cheapest time of day to fly to the United Kingdom is generally in the evening, when retur flights cost £748 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally at night, which is peak travel time and where the average cost of a ticket is £810.

Can I save money by flying with a stopover from Philadelphia to the United Kingdom?

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 2 stops stopover the cheapest option at £647 on average.

What is the cheapest month to fly from Philadelphia to the United Kingdom?

The cheapest month for flights from Philadelphia to the United Kingdom is January, when tickets cost £534 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of return tickets is £1,035 and £936 respectively.

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

If your flying dates are flexible, you should consider flying to United Kingdom on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from Philadelphia to United Kingdom. For your return ticket, we recommend flying on a Tuesday and avoiding Saturdays for the best deals.

How far in advance should I book a flight from Philadelphia to the United Kingdom?

To get a below-average price on a flight from Philadelphia to the United Kingdom, you should book around 3 weeks before departure, which saves you about 42% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Good to know - Cheap tickets from Philadelphia to the United Kingdom

Low season

January
Best time to beat the crowds (25% less expensive on average)
Most popular time to fly (25% more expensive on average)

Flights from Philadelphia to the United Kingdom: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Philadelphia to the United Kingdom 
LisaFlew with British Airways-May 2025
Make sure you have enough time in London if you have a transfer flight. I would recommend at least 2 hours.
RadicalFlew with American Airlines-May 2025
Don’t put everything in your gate check bags. Make sure you have clothes in your carry on
Verified travelerFlew with British Airways-Oct 2024
Eat well before boarding if you’re a picky eater.
GlennFlew with British Airways-Jun 2024
British airways could have many delays, ensure there's enough time for the layover

FAQs - booking United Kingdom flights

  • How does KAYAK find such low prices on flights from Philadelphia to the United Kingdom?

    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 the United Kingdom.

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

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

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Philadelphia to the United Kingdom 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 the United Kingdom?

    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 the United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding a cheap flight from Philadelphia to the United Kingdom

  • Looking for a cheap flight from Philadelphia to the United Kingdom? 25% of our users found tickets from Philadelphia to the United Kingdom for the following prices or less: London £265 one-way - £756 round-trip

Reviews of the top 5 airlines flying from Philadelphia to the United Kingdom

 
Need help choosing which airline to fly with from Philadelphia to the United Kingdom? 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.
7.3
Aer LingusOverall score based on 1755 reviews
7.2Comfort
7.5Boarding
8.1Crew
7.0Entertainment
6.7Food
Airline reviews

Excellent cabin crew. They helped a number of passengers with mobility challenges and a mother with a 3 year old and an infant. Better than most other airlines by far. Well done Eduardo!

10.0 ExcellentRon, Aug 2026
Read more Aer Lingus reviews

Excellent cabin crew. They helped a number of passengers with mobility challenges and a mother with a 3 year old and an infant. Better than most other airlines by far. Well done Eduardo!

Good, I slept the entire flight so I cannot add many inflight details

I didn't know if the plane was even go And the plane shook like it was from the same era as Indiana Jones

No snacks, drinks or coffee. No entertainment, not comfortable seats

The direct flight was a superb idea; please continue. The seats were less than comfortable for such a long flight.

The free WiFi was great so I could stream movies during the flight. I would like to have movies available instead of on my device. Thanks!

The flight was delayed leaving Philadelphia due to “catering” and consequently arrived in Dublin some 75 minutes later than scheduled. Consequently this caused me to miss my connecting flight to Glasgow and I had to spend the night in Dublin.

Amenity kits were never handed out. There was zero friendliness and assistance by crew. Food was uneatable. One drink was offered and no wine, with dinner or before or after. Cocktails and beverages were not encouraged and when I asked for water, none was given. Poorest, most cramped business class flight I’ve ever been on.

I fly to the USA every 6wks on Ave and 99% of the time I fly Aer Lingus. If I fly BA I’m always disappointed. My only criticism is the food. I’m vegan and over the last year it’s got slightly better these last couple of flights but on the whole it’s not good! Salad and fruit salad for breakfast and that’s also the starter and desert for the lunch/dinner and the main is usually rice with fried veg 😳the pasta is pretty good though. That’s been the last 2 meals…. Everything else is fantastic.

The flight was half full and I presume that the next few days are even less busy not sure why they are still charging a premium to change a flight.

Flight was cancelled due to a myriad of operational issues. You guys really suck

Our gate was changed several times, and the gate agents were just as in the dark as all of us in knowing when our plane would arrive at PHL.

mechanical problem delayed more than 2 hours on the run way.

Getting to Scotland with no luggage (no medicine, no clothes and no club) on golf trip very disappointed

The check in agents in PHL and gate agents had to have been the rudest women that I have ever encountered; the agent weighing the bags at check in screamed continuously at all of the guests as did the woman at the gate.I have Executive Platinum status with AA and fly a lot with AA but these ladies were the absolute worst I had the displeasure to encounter!

My flight to London from Philadelphia was cancelled due to weather.

The flight was canceled 3 hours after original take off time

Again flight was awesome except British Airways lost both gate checked luggage’s. Still missing

Missed connection from Philadelphia to London because flight from DC was seriously delayed. Was re-routed the next day (had to pay for hotel) to Zurich and was given a main cabin middle seat while I had paid for premium. Great job AA!!!

So uncomfortable to sit in the tiny space on a long, international. Food was rough. Please, less white flour and processed food.

Very good flight that left on time and arrived earlier than anticipated, which was a plus! The crew members were very welcoming and helpful. However, the temperature on the flight was very cold - almost to the point of extreme discomfort. Additionally, requiring passengers to pay $8 for headphones to access the JetBlue entertainment was disappointing. Those earbud jacks are not used with most technology and would not be able to be used. There was no option to use Bluetooth for my own earbuds. Beyond those inconveniences, the flight was good.

My original flight was cancelled. My replacement flight was delayed over 2 hours. I lost my whole day in NY

Delays were crazy long (over an hour) both for boarding and baggage claim

awful expereince. boarding was a mess and not communicated, then we sat on a hot plane and were at risk of getting kicked off

2 hour delay and a lack of air conditioning on the plane. Not a good combination

The food took two hours to be delivered to my seat, when I'm on an overnight flight I want to sleep asap after take off

They lost my luggage and refuse to help. Terrible airline. I've never experienced worse customer service in my life. Pretty much just told me too bad that I lost all my luggage, not caring that I am stuck in Europe for 2 weeks with absolutely nothing.

Flight was fine, price was good but food onboard was abysmal. I was on there for breakfast and lunch and dinner 845am EST to 845pm GMT and all I got was a yoghurt parfait, fruit and a piece of cake. Later snacks included an ice-cream brownie and a pizza twist. I was hungry by the time I landed and the airport amenities were closed. Not happy.

I especially liked the lead crew officer. His boarding and safety announcements were made with a bit of novelty and humor. The flight also left the gate 10 minutes early and we landed about 20 minutes early… It was a delightful flight…

As with all airline's seats, a little more padding would appreciated. Especially on longer flights.

The food on the flight was of marginal quality. Small bits of chicken, instant mashed potatoes and some carrots. The rolls were very dry, nearly inedible. The seats were quite small and didn’t allow for any shifting of position during the flight. There was limited leg room.0

It was fortunate that the flight arrived in London in accordance with schedule, and the luggage was promptly transferred to the luggage carousel. However, I find it concerning that even minor issues in economy cabins are prevalent within the industry. American Airlines, in particular, appears to have the least legroom and feels more crowded due to the proximity of neighboring passengers. Additionally, the crew’s adherence to protocol is inconsistent. While they may enforce certain rules set by the FAA on a select few individuals, they often overlook numerous violations, such as failing to reset seat recline during landing.

I liked the comfort of the plane. It was unexpected from past experiences.

Chair is very high. Your feet cannot touch the ground for 8 hours flight. It was a nightmare. Food was bad.

Flight was delayed 3 hours and 15 minutes. The delay caused me to miss my tour group due to arriving late.

Paid for my seat 4 months ago. Did not pay the extra for specific seat assignment ( never have and never was a problem). Could not electronically check in (found out it was due to overbooking and that unassigned seats get bumped first - never happened to me before). Luckily, did make the flight. Very stressful - would have been extremely disruptive for my travel plans. UK Visa - never notified by Kayak or BA that a visa was required. Had to spend 15 minutes to download and complete app at the flight counter and pay $25, and was told they would let me know in 3 days if I would get it (flight landing in 10 hours from when I completed app). Luckily, visa was approved before landing. Unnecessary stress created here. Food - main meal, curry chicken barely palatable with unrecognizable vegetable. Desert cup, cheesecake, also barely palatable. Salad cup was good. Small water offered only 3 times (before main meal, at main meal, at morning snack) - not nearly enough for long flight.

Flight boarded three hours late for no reason other than someone made a huge error in crew scheduling. We missed our connecting flight in Madrid and got zero help from American or Iberian airlines on rebooking. We had to pay for a car to take us to the Madrid train station and pay for train tickets to Santiago. We never used our booked flight to Santiago. American claims I can submit the expenses but they are not obligated to cover them. Very frustrating.

Super uncomfortable main cabin. Omg no leg space or seat space horrible

The trays weren’t wiped. They still had food from last passengers

Flight reservation was canceled withou notice had to spend the night in the airport

Great until k found out they never got my check bags onto the plane.

Boarding process was chaotic. Confusion over Boarding gates: gate 55 or gate 56 ???. Unnecessary standing in long lines to board. Better to call out Boarding groups one at a time and everyone else to sit. Airline only has 2 Boarding groups 1-3 and 4-9. That causes over crowding and chaos

The flight was ok. The seats are so small. The free wifi for members was not an option on this flight. The one flight attendant, older woman with straight white/grey hair, was very rude. The gentleman next to me asked about the wifi since he was a member as well. He stated, accurately, that the option to enter the idea number was not available. Her response was, "I don't know what to tell you" and walked away from him. The rest of the staff was wonderful. I asked another flight attendant about the wifi, she said the free wifi was not enabled on that flight (true or not- at least she was friendly). It was also pretty dirty. When I opened the tray table it had mushed crumbs and there was a dirty used pair of ear buds in my seat pocket. Lastly the air vent above my head was working but stuck so I was unable to move it to face me when it got warm. I fly American often but this really was not a great flight.

Someone switched seats in business class so they could sit together and we were left apart (3). Very disappointing. Staff did nothing

I have always been pleased with their service. Would not change a thing

My flight was late. We stayed in aircraft one hour 😩

We were on flight for 7 hrs and there was no WiFi. Not really easy to use any of our electronics. Def not ideal

First time flying with BA and I will do it again. Staff at airport and on board were very nice and helpful

Overall, terrific service, accommodations, and experience. Only reason comfort was rated lower was because it was difficult to keep a comfortable sleeping position for the overnight flight, but I also had an economy seat.

Flight landed on time but there was a delay for over a half hour unloading us. I missed my connecting flight to Milan and had to wait 2 hours for the next flight. I was supposed to take a bus to Turin from there and do business with a bank. By the time I was able to get to Turin I arrived when the banks were closed and Friday was a religious holiday which they were closed. This ruined my whole point of the trip as I return to the USA tomorrow without getting buisness done. I also lost out on the money I paid for my original bus ticket and had to buy another.

More options for your flight from Philadelphia to the United Kingdom

Complete your trip to the United Kingdom with a hotel stay or car hire