PHL - LHR

Find Cheap Flights from Philadelphia to London Heathrow

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Philadelphia (PHL)
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Philadelphia to London Heathrow flight information

Flights arrive in London Heathrow
Flights depart from Philadelphia
Flight price £358
Distance 3,535 miles
Airlines Aer Lingus, Finnair, British Airways, Virgin Atlantic

Good to know

Low season:
August
Best time to beat the crowds
4%
expected price decrease
High season:
June
Most popular time to fly
21%
expected price increase
Average price:
£746
(avg. price over the last 2 weeks)
Good deal:
£483
or less (return)

When to Book Flights from Philadelphia to London Heathrow

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for finding a cheap flight

Looking for a cheap flight? 25% of our users found flights on this route for £483 or less.
The cheapest flight from Philadelphia to London Heathrow was found, on average, 85 days before departure.
Book at least 3 weeks before departure in order to get a below-average price.
High season is considered to be May, June and July. The cheapest month to fly is August.
Morning departure is around 33% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Philadelphia to London Heathrow Flights

How long does a flight from Philadelphia to London Heathrow take?
The average direct flight takes 7h 05m, covering a distance of 3535 miles.
How many flights are there between Philadelphia and London Heathrow?
There are 337 (direct) flights between Philadelphia and London Heathrow per week, averaging 48 per day.
Which airlines provide the cheapest flights from Philadelphia to London Heathrow?
In the past 3 days, the cheapest return tickets were found on Aer Lingus (£358), Finnair (£368) and British Airways (£374).
Which airlines fly most frequently between Philadelphia and London Heathrow?
American Airlines (8 times daily), Finnair (8 times daily), Iberia (8 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly from Philadelphia to London Heathrow?
For Philadelphia to London Heathrow, Friday is the cheapest day to fly on average and Sunday is the most expensive. Flying from London Heathrow back to Philadelphia, the best deals are generally found on Sunday, with Friday being the most expensive.
How does KAYAK find such low flight prices?
KAYAK processes over 2 billion travel queries annually and displays results from hundreds of airlines and third party sites, allowing it to find a variety of flight prices and options. It also displays results from 2M+ properties along with car hire, holiday packages, activities and millions of verified reviews so users can see as many available travel options as possible.
How can Hacker Fares save me money?
Hacker Fares allow you to combine one-way tickets on different airlines when it can save you money over a traditional return ticket.
Does KAYAK query more flight providers than competitors?
Yes, KAYAK has access to more data and information than online travel agencies and consistently outperforms the competition in accuracy, globally.
How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a given destination and date is likely to change within 7 days, so travellers know whether to wait or book now.

Book cheap flights from Philadelphia to London Heathrow (return)

Airports
Origin
Philadelphia
£358
only
£358
Destination
London
£358
only
£358
Fri, 10 Jan
PHL
Philadelphia
LHR
London Heathrow
10h 30m
Sun, 12 Jan
LHR
London Heathrow
PHL
Philadelphia
12h 55m
£358
Trip: 3 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 5,945 reviews
Overall
7.6
Boarding
7.6
Comfort
7.3
Crew
8.0
Entertainment
7.1
Food
6.9
JFK
DUB
Excellent 8.0

Cons: Good service cold have come sooner, I wanted to sleep as much as possible but it was a full 2 hours before the service finished.

CDG
DUB
Okay 4.6

Pros: Nothing out of the ordinary but I am not going to fly Air Lingus or TAP ever again.

Cons: the Team Leader at the check in counter was nasty, Her colleague made the mistake of not telling me that I had to wait there for the wheelchair that was going to take me to the plane, so I went to have a light breakfast. Then I waited half an hour on my feet waiting for the wheelchair

DUB
DBV
Good 6.6

Pros: Crew was good. Boarding was good.

Cons: Seats not that comfy.

BDL
DUB
Excellent 8.0

Cons: Not much legroom

EWR
DUB
Excellent 10.0

Pros: Crew was great!

Wed, 1 Apr
PHL
Philadelphia
LHR
London Heathrow
7h 25m
Wed, 15 Apr
LHR
London Heathrow
PHL
Philadelphia
22h 30m
£368
Trip: 15 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 27 reviews
Overall
7.8
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
ORD
CDG
Mediocre 3.3

Cons: The seats are uncomfortable, no leg room, no space between seats and the trays hit ones’s stomach. The whole experience was very uncomfortable. The food was awful. Overheated and not cooked through at the same time. Breakfast was odd. Non-Greek yoghurt and cashews. Just strange.

AMS
DFW
Excellent 10.0

Pros: Comfortable

PHL
LHR
Okay 4.6

Cons: Trying to get through airport security was an unorganized clown show with them herding groups of passengers back and forth between airport terminals resulting in many people almost missing their flights because the lines just weren't moving. Once on the airplane, the international flight had TVs in the ceiling in the row playing one in-flight movie (what is this 1995?). American is such a terrible airline. The old US airways, Lufthansa, and British Airways, are way better international flights every time I've flown with them. Personal entertainment at your seat for each flight (i thought this was standard on all international flights in the past like 10 years) and more food and drinks throughout the flight.

HEL
TKU
Mediocre 3.0

Pros: At least the crew was friendly

Cons: The flight was delayed for 1 hour and we were sitting inside the airbus with no air condition due to technical difficulties on 35 degrees sweating like pigs. No water or snack was offered even though the delay was so big.

HEL
ORD
Okay 5.6

Cons: Could be better, say, like with Singapore Airlines..

Wed, 26 Feb
PHL
Philadelphia
LHR
London Heathrow
7h 05m
Fri, 6 Mar
LHR
London Heathrow
PHL
Philadelphia
11h 55m
£374
Trip: 10 days
7.5GoodShow reviews
Overall 7.5 Good
Based on 73 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
LHR
BEY
Excellent 10.0

Pros: Everything was really good. Very nice crew. I will highly recommend it.

Cons: I think it is one of the best.

PHL
LHR
Okay 5.0

Cons: I feel like the overall product is so devalued at BA these days. It just doesn't feel classy anymore. As opposed to Lufthansa, which is an example of a European carrier that cares about passenger comfort and experience. Also the typical circling of LHR to get a slot is annoying and makes me want to avoid BA.

PHL
LHR
Okay 5.6

Pros: Food was good.

Cons: My wife had a tall guy on one side whose knees spilled over into her. She also had a tall guy in front of her who fully reclined his seat. She felt like she was in a coffin. She had to get up and walk around to get some air. The seats are too close on this 747 that no one should have to fly it. .

PHL
EDI
Excellent 10.0

Pros: There was a special needs boy that sat behind me and he had some issues (long flight, understandable) and the crew were AMAZING with him. Not everyone has common or even human decency. These people were rad, and it was lovely to see.

LHR
MAN
Mediocre 2.0

Cons: They made me checkin a small bag

Thu, 28 Nov
PHL
Philadelphia
LHR
London Heathrow
15h 26m
Thu, 5 Dec
LHR
London Heathrow
PHL
Philadelphia
19h 58m
£400
Trip: 8 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 1,509 reviews
Overall
8.1
Boarding
8.2
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
DPS
BNE
Good 7.6

Pros: the crew was very polite and professional.

Cons: the aircraft is small and confined, only two toilets for the entire economy level passengers for a 6 hour flight. the online entertainment lacks variety and the food was okay.

CHC
BNE
Excellent 8.0

Pros: Amazing and helpful crew. Great seat.

AKL
MEL
Okay 5.6

Pros: There was one stewardess that really made the trip feel less "restricted" in the way she would greet, talk, serve, and just being what I always experienced good international flight staff to be. I wish I was able to get her name so I can praise the airlines for hiring such a great staff like her.

LAX
SYD
Excellent 10.0

Pros: Excellent service!

BNE
LAX
Excellent 9.3

Pros: such a big difference in size of aircraft, very comfortable and great crew.

Fri, 6 Dec
PHL
Philadelphia
LHR
London Heathrow
10h 30m
Sun, 8 Dec
LHR
London Heathrow
PHL
Philadelphia
13h 15m
£359
Trip: 3 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 5,945 reviews
Overall
7.6
Boarding
7.6
Comfort
7.3
Crew
8.0
Entertainment
7.1
Food
6.9
AMS
DUB
Good 7.0

Pros: I almost missed my next flight from Dublin to Chicago. There was not enough time between flights with current security measures. Your site should not have suggested those two flights so close.

PHL
DUB
Good 6.0

Cons: Lost my bags

DUB
JFK
Okay 5.3

Cons: The food. We waited too long to take off and there was no announcement why we were sitting on waiting...

MSP
DUB
Excellent 10.0

Pros: Crew was good. Seats were good.

BOS
DUB
Good 7.0

Pros: the seat configuration is 2/4/2 so if you get a seat by the window, you have your significant other or friend next to you and no one else which is nice. Food was decent.

Cons: Entertainment didn't have any interesting movies or TV shows. Bottom of the barrel. No coffee or tea was offered before landing and it was advertised.

Tue, 21 Apr
PHL
Philadelphia
LHR
London Heathrow
7h 10m
Mon, 27 Apr
LHR
London Heathrow
PHL
Philadelphia
22h 30m
£373
Trip: 7 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 27 reviews
Overall
7.8
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
EDI
HEL
Excellent 10.0

Pros: Fell asleep and didn’t even realise. Finnair is very friendly and the staff are super nice. I was very thirsty and asked for two cups of water instead of one and the lady was not hesitant to give me two cups in quick succession. Very good air company

Cons: Nothing really too bad, you get what you expected. May of been nice to have a free sandwich as it’s a non stop flight - this is because Lufthansa has one stopover and offers a free sandwich and drink.

HEL
ORD
Okay 5.6

Cons: Could be better, say, like with Singapore Airlines..

VIE
HEL
Excellent 9.0

Cons: A better breakfast...

HEL
TKU
Mediocre 3.0

Pros: At least the crew was friendly

Cons: The flight was delayed for 1 hour and we were sitting inside the airbus with no air condition due to technical difficulties on 35 degrees sweating like pigs. No water or snack was offered even though the delay was so big.

HEL
KRK
Excellent 10.0

Pros: Finnair is always perfect. Always on time, professional, clean and comfortable. They give free coffee, water and blueberry juice.

Tue, 10 Dec
PHL
Philadelphia
LHR
London Heathrow
7h 15m
Wed, 25 Dec
LHR
London Heathrow
PHL
Philadelphia
11h 05m
£375
Trip: 16 days
7.5GoodShow reviews
Overall 7.5 Good
Based on 73 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
PHL
LHR
Good 6.0

Pros: Entertainment selections

Cons: Overbooking the seats. I ordered my tickets month ago. I didn't have a seat when I went to check in. I was the last person on the plane! Your online check-in isn't working and I didn't have a seat until the very last minute!

ZRH
LHR
Mediocre 3.3

Pros: Entertainment system was decent.

Cons: Crew was pretty unfriendly abs the food was very poor.

PHL
LHR
Mediocre 2.6

Cons: There is more room in an economy seat on a commuter flight than there is on a 747. After this itinerary is complete I have no intention to ever fly with British Airways again.

GVA
LHR
Excellent 10.0

Pros: All was good and on time

Cons: Just be good, they could still offer free drinks or water to passengers

FRA
LHR
Good 7.0

Cons: I paid extra for the seat but it was very cramped.

Thu, 5 Mar
PHL
Philadelphia
LHR
London Heathrow
16h 05m
Thu, 19 Mar
LHR
London Heathrow
PHL
Philadelphia
15h 46m
£400
Trip: 14 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 1,509 reviews
Overall
8.1
Boarding
8.2
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
JNB
LHR
Excellent 8.6

Pros: Entertainment and helpful staff

Cons: Had worst seat on plane on outward because I didn't know I could pick a seat free of charge before online checkin This could be a lack of communication on Kayak/Last Minute.com as opposed to Virgin

LHR
SFO
Good 6.3

Pros: It was empty so we were told we could move around in the empty seats

Cons: Food was basically carbs, carbs and more carbs (especially if vegetarian). Some diversity, please. Staff forgot requests on a couple of occasions (Economy Delight cabin).

LHR
PDX
Excellent 8.3

Pros: Great crew. Very kind and efficient.

Cons: American carriers seem to enjoy poor seat ergonomics.

LAX
BNE
Excellent 8.3

Pros: The crew was very good and there was enough leg room.

Cons: The dinner option was underwhelming.

JNB
LHR
Good 7.6

Pros: Most of it was of a reasonable standard.

Cons: Plane was full

Mon, 6 Jan
PHL
Philadelphia
LHR
London Heathrow
29h 15m
Mon, 13 Jan
LHR
London Heathrow
PHL
Philadelphia
24h 25m
£408
Trip: 8 days
7.5GoodShow reviews
Overall 7.5 Good
Based on 73 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
PHL
LHR
Okay 5.6

Pros: Food was good.

Cons: My wife had a tall guy on one side whose knees spilled over into her. She also had a tall guy in front of her who fully reclined his seat. She felt like she was in a coffin. She had to get up and walk around to get some air. The seats are too close on this 747 that no one should have to fly it. .

PHL
LHR
Okay 5.0

Cons: Food was awful.

PSA
LHR
Excellent 10.0

Pros: Service

PHL
LHR
Mediocre 2.0

Pros: I was not given a chance to like anything as the flight was cancelled.

Cons: That when I called to rebook another flight, I was on hold for 75 minutes. Yes, that was 75 minutes. I was switched from British Air to Finn Air and then back to British Air. It was a mess.

PHL
LHR
Good 6.0

Pros: Entertainment selections

Cons: Overbooking the seats. I ordered my tickets month ago. I didn't have a seat when I went to check in. I was the last person on the plane! Your online check-in isn't working and I didn't have a seat until the very last minute!

Mon, 28 Oct
PHL
Philadelphia
LHR
London Heathrow
18h 15m
Thu, 7 Nov
LHR
London Heathrow
PHL
Philadelphia
13h 15m
£437
Trip: 11 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 5,945 reviews
Overall
7.6
Boarding
7.6
Comfort
7.3
Crew
8.0
Entertainment
7.1
Food
6.9
JFK
DUB
Excellent 8.0

Cons: Good service cold have come sooner, I wanted to sleep as much as possible but it was a full 2 hours before the service finished.

EWR
DUB
Excellent 10.0

Pros: Crew was great!

PHL
DUB
Good 6.0

Cons: Lost my bags

IAD
DUB
Good 6.6

Cons: Many people missed their connection at Dublin. I had a horrible ~6hr wait. Aer Lingus did nothing to help or compensate.

LHR
DUB
Good 6.3

Cons: Lost our luggage and broke our stroller

Tue, 5 Nov
PHL
Philadelphia
LHR
London Heathrow
16h 10m
Sun, 10 Nov
LHR
London Heathrow
PHL
Philadelphia
18h 27m
£519
Trip: 6 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 1,509 reviews
Overall
8.1
Boarding
8.2
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
LHR
JFK
Okay 4.6

Pros: Crew was nice

Cons: Screens have poor color quality Seat too small Legroom cut into by electronics box Row 45 next to bathroom and no windows

BNE
LAX
Excellent 9.3

Pros: Karl was amazing! So helpful and sweet!

Cons: Having the crew tell the guy behind me to plug in his ear phones to watch the video in his phone, rather than me after 20 minutes of noise.

LAX
BNE
Excellent 8.3

Pros: The crew was very good and there was enough leg room.

Cons: The dinner option was underwhelming.

LHR
SEA
Excellent 10.0

Pros: The crew on Virgin Atlantic was superb!

SFO
LHR
Good 6.0

Pros: crew was nice

Cons: First time flying with a partner through Delta, so they stuck us on a Virgin Atlantic flight meaning I didn't get my free Delta check in bag (a fee of $60 each way) when I have gotten it every other flight I have ever taken with them. It was also 2 whole hours late in boarding.

Wed, 30 Oct
PHL
Philadelphia
LHR
London Heathrow
12h 40m
Tue, 12 Nov
LHR
London Heathrow
PHL
Philadelphia
11h 55m
£502
Trip: 14 days
7.5GoodShow reviews
Overall 7.5 Good
Based on 73 reviews
Overall
7.4
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.8
LCY
AMS
Poor 0.0

Cons: With 2h30 hours delayed flight I missed my train and had to have a hotel Arcturus airport in Amsterdam and continue my journey only the day after.

PHL
LHR
Okay 5.0

Cons: Food was awful.

PHL
LHR
Okay 5.6

Pros: Food was good.

Cons: My wife had a tall guy on one side whose knees spilled over into her. She also had a tall guy in front of her who fully reclined his seat. She felt like she was in a coffin. She had to get up and walk around to get some air. The seats are too close on this 747 that no one should have to fly it. .

PHL
EDI
Excellent 10.0

Pros: There was a special needs boy that sat behind me and he had some issues (long flight, understandable) and the crew were AMAZING with him. Not everyone has common or even human decency. These people were rad, and it was lovely to see.

PHL
LHR
Mediocre 2.6

Cons: There is more room in an economy seat on a commuter flight than there is on a 747. After this itinerary is complete I have no intention to ever fly with British Airways again.

Sun, 22 Dec
PHL
Philadelphia
LHR
London Heathrow
7h 20m
Sat, 28 Dec
LHR
London Heathrow
PHL
Philadelphia
24h 20m
£981
Trip: 7 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 5,945 reviews
Overall
7.6
Boarding
7.6
Comfort
7.3
Crew
8.0
Entertainment
7.1
Food
6.9
JFK
DUB
Excellent 9.3

Pros: Crew was very helpful on land and on the plane. Very supportive and helpful.

BCN
DUB
Excellent 9.6

Cons: Delayed. Disorganized boarding.

BUD
DUB
Excellent 10.0

Pros: All good

Cons: The Dublin airport is in desperate need of air-conditioning!! Pretty amazing and international airport doesn’t have this handled.

ORD
DUB
Excellent 8.6

Pros: Great crew, smooth flight

SFO
DUB
Excellent 9.3

Pros: Had a fantastic flight and the crew was nice.

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
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