Find Cheap Flights from Philadelphia to London (PHL - LON)

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Philadelphia to London flight information

Avg. flight duration 7h 50m
Flights arrive in London
Flights depart from Philadelphia
Flight price £422
Distance 3548 miles
Airlines British Airways, Aer Lingus, Air Canada, Finnair

Good to know

Low season:
April
Best time to beat the crowds
2%
expected price decrease
High season:
July
Most popular time to fly
11%
expected price increase
Average price:
£696
(avg. price over the last 2 weeks)
Good deal:
£499
or less (return)

When to Book Flights from Philadelphia to London

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 £498 or less.
The cheapest flight from Philadelphia to London was found, on average, 75 days before departure.
Book at least 3 weeks before departure in order to get a below-average price.
High season is considered to be June, July and August. The cheapest month to fly is April.
Morning departure is around 31% 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 Flights

How long does a flight from Philadelphia to London take?
An average non-stop flight takes 7h 05m, covering a distance of 3548 miles.
How many flights are there between Philadelphia and London?
There are 255 (non-stop) flights between Philadelphia and London per week, averaging 37 per day.
Which airlines provide the cheapest flights from Philadelphia to London?
In the past 3 days, the cheapest return tickets were found on Multiple Airlines (£422), British Airways (£433) and Aer Lingus (£440).
Do I need a passport to fly between Philadelphia and London?
Yes.
Which airlines fly most frequently between Philadelphia and London?
Finnair (5 times daily), British Airways (5 times daily), Malaysia Airlines (4 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly from Philadelphia to London?
For Philadelphia to London, Saturday is the cheapest day to fly on average and Sunday is the most expensive. Flying from London back to Philadelphia, the best deals are generally found on Tuesday, with Tuesday being the most expensive.

Book cheap flights from Philadelphia to London (return)

Airports
Origin
Philadelphia
£422
only
£422
Destination
London
£422
only
£422
£436
only
£436
Sat, 3 Mar
PHL
LHR
19h 14m
Sun, 4 Mar
LHR
PHL
25h 01m
£422
Trip: 2 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 23 Feb
PHL
LHR
12h 25m
Sun, 25 Feb
LHR
PHL
30h 15m
£433
Trip: 3 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 50 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
PHL
LHR
OK 4.3

I thought I was supposed to get a free meal and was never offered that or even a complimentary beverage. The flight attendants allowed a group of four passenger to stand during almost the entire flight in the aisles and in my row, making it difficult for people to get around them and didn't allow for an enjoyable flying experience.

PHL
LHR
OK 5.3

Flight attendant were pleasant

Small seats and little leg room....and I have short legs

PHL
LHR
OK 5.6

Food was good.

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
Good 7.6

Staff was excellent

Seats were very cramped

PHL
LHR
Excellent 10.0

The personnel were most helpful, pleasant, and reassuring when I discovered I had left something on the plane. It was found and returned to me quite promptly and my continued flight was rebooked with the minimum of fuss (and embarrassment). Everyone was wonderful.

I am not a seasoned traveller. Checking for a small item (such as a passport) in the overhead compartment was not possible.

Sat, 26 May
PHL
LGW
11h 40m
Mon, 28 May
LGW
PHL
10h 55m
£440
Trip: 3 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4137 reviews
Overall
7.6
Boarding
7.7
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.9
DUB
ORD
Good 6.0

There were 3 travelers in our family and we were not seated together. I assumed the flight was full but to our surprise there were empty seats that would allow us to be together. Serving of meals and drinks were slow although the food was better this time compared to our Chicago to Dublin trip. Movie selections were poor.

LHR
DUB
Good 6.3

I had a changeable ticket but could only do so a 1counter. Missed earlier flight as a result. Terrible service. At Dublin airport going out they let me change at the gate. Bot not in Heathrow.

BOS
DUB
Excellent 10.0

Was exceptionally impressed that the cabin crew made a cabin-wide announcement concerning a passenger with a peanut allergy. Other airlines could learn a lot in this department. Keep up the good work!

JFK
DUB
Excellent 8.0

I had a good flight. No complaints.

DUB
MAN
Excellent 10.0

Left on time and arrived early

Nothing

Sun, 8 Apr
PHL
LHR
17h 55m
Sun, 22 Apr
LHR
PHL
14h 47m
£452
Trip: 15 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 21056 reviews
Overall
7.2
Boarding
7.3
Comfort
7.0
Crew
7.7
Entertainment
6.9
Food
6.5
HND
YYZ
OK 4.3

Loved crews.

Our plane was delayed for 5 hrs. On top of it, they brought in a smaller plane with 100+ less seating than original one which caused us losing our reserved seating. They refused to give us our seating arrangements up until the boarding time. All the other passengers had boarding tickets but us. So our family couldn’t sit together. I had a super pleasant experience with Air Canada prior to this trip so it made me so sad. On the other hand, crew were fantastic. We missed our connecting flight but they took care of us so I was happy in that sense.

SFO
YVR
OK 4.0

Flight was delayed and left 2 hours late.

SCL
YYZ
OK 4.0

Friendly crew.

Terrible food and entertainment on the flight to and from Santiago. Felt squizzed like a sardine in the can in the middle row. I will never choose Boening 777 for overnight flights. Transfer in Toronto was confusing. Delayed arrival caused problems in retrieving luggage and made a stressful experience getting to Chicago flight on time - not mentioning sluggish US border check in Toronto. For my next trip, I would rather pick another airline and transfer airport.

LAX
YVR
Good 6.0

Typical Air Canada flight. Not great but not horrible (surprisingly)

The entertainment systems were broken on our seats but they did give us a small discount voucher.

YYC
YUL
Excellent 8.0

The fact that you still have movies that you don't have to download apps for, nice to keep it simple.

Sat, 3 Mar
PHL
LHR
7h 05m
Sat, 10 Mar
LHR
PHL
8h 35m
£496
Trip: 8 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 27 reviews
Overall
7.9
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
PHL
LHR
OK 5.3

The entertainment and service was the only plus on this flight.

When I booked my ticket a month in advance, British Airways was going to charge me extra for trying to book my seating in advance. They told me it would be free if I called 24hrs before the flight. I called 24hrs before and they told me they could not book my seats because the airport owned the seating. My first flight was with American Airlines, they gave me a boarding pass, however for my leg with British Airways, I had to go get ANOTHER boarding pass to board the flight. This airline was very inconvenient and I felt scammed booking with them. I would not recommend this airline to anyone!

PHL
LHR
Good 6.0

It was a quick, smooth flight.

The chicken for dinner was horrible. The call buttons for assistance sounded constantly the entire flight.. Not sure if it was a malfunction.

PHL
LHR
OK 5.6

Crew was very noisy. It was an overnight flight. Waking us up at 1am for dinner not really needed.

PHL
LHR
OK 4.6

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.

PHL
LHR
Excellent 8.0

Flight attendant , i dont her but she was sweet and attentive.

The leg room was really tight even for short person

Tue, 13 Mar
PHL
LGW
14h 50m
Wed, 14 Mar
LGW
PHL
24h 16m
£436
Trip: 2 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 6 Apr
PHL
LHR
12h 35m
Sun, 8 Apr
LHR
PHL
11h 15m
£440
Trip: 3 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4137 reviews
Overall
7.6
Boarding
7.7
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.9
DUB
CDG
Excellent 10.0

Free-for-all boarding was less than ideal. Boarding by seat rows as on Boston to Dublin flight would have been better.

YYZ
DUB
Excellent 8.0

Great seats plenty of leg room

The food... Yikes

DUB
JFK
Good 6.3

average to below average

robbery for a small glass of wine - $8

DUB
MCO
Excellent 10.0

Even if Aer LIngus is considered a low cost, I felt it was everything but that. The plane looked new, the board computers were modern and had the latest movies, there were charging docks for phones and even internet. We got to Orlando 30 minutes ahead of schedule, which was great!

DUB
ORD
Good 6.0

There were 3 travelers in our family and we were not seated together. I assumed the flight was full but to our surprise there were empty seats that would allow us to be together. Serving of meals and drinks were slow although the food was better this time compared to our Chicago to Dublin trip. Movie selections were poor.

Mon, 12 Mar
PHL
LHR
9h 20m
Wed, 21 Mar
LHR
PHL
29h 25m
£472
Trip: 10 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 50 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
PHL
LHR
OK 4.3

I thought I was supposed to get a free meal and was never offered that or even a complimentary beverage. The flight attendants allowed a group of four passenger to stand during almost the entire flight in the aisles and in my row, making it difficult for people to get around them and didn't allow for an enjoyable flying experience.

PHL
LHR
Good 7.6

Staff was excellent

Seats were very cramped

PHL
LHR
Mediocre 2.6

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.

PHL
LHR
Mediocre 2.0

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

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
OK 5.0

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.

Mon, 12 Mar
PHL
LGW
14h 22m
Wed, 14 Mar
LGW
PHL
24h 16m
£443
Trip: 3 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 9 Feb
PHL
LHR
11h 25m
Sun, 11 Feb
LHR
PHL
13h 15m
£473
Trip: 3 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 50 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
PHL
LHR
OK 4.0

It wasn't a BA flight, but AA. Confusion reigns!

PHL
LHR
OK 5.0

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
Good 7.6

Staff was excellent

Seats were very cramped

PHL
LHR
Excellent 10.0

Everything

Nothinf

PHL
LHR
OK 5.3

Flight attendant were pleasant

Small seats and little leg room....and I have short legs

Thu, 24 May
PHL
LHR
10h 30m
Mon, 11 Jun
LHR
PHL
12h 15m
£492
Trip: 19 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4137 reviews
Overall
7.6
Boarding
7.7
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.9
BOS
DUB
Excellent 10.0

Was exceptionally impressed that the cabin crew made a cabin-wide announcement concerning a passenger with a peanut allergy. Other airlines could learn a lot in this department. Keep up the good work!

BCN
DUB
Good 6.0

I don't understand why they have to charge for water, coffee or tea. These are basic beverages.

JFK
DUB
Excellent 8.0

I had a good flight. No complaints.

DUB
ORD
Good 6.0

There were 3 travelers in our family and we were not seated together. I assumed the flight was full but to our surprise there were empty seats that would allow us to be together. Serving of meals and drinks were slow although the food was better this time compared to our Chicago to Dublin trip. Movie selections were poor.

AGP
DUB
OK 5.0

on time

food is expensive and the drinks are robbery

Tue, 6 Mar
PHL
LGW
13h 50m
Mon, 12 Mar
LGW
PHL
22h 51m
£448
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 2 Mar
PHL
LHR
11h 25m
Sun, 4 Mar
LHR
PHL
13h 15m
£473
Trip: 3 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 50 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
PHL
LHR
Good 7.6

Staff was excellent

Seats were very cramped

PHL
LHR
OK 4.0

It wasn't a BA flight, but AA. Confusion reigns!

PHL
LHR
Mediocre 2.6

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.

PHL
LHR
Good 7.3

Crew was nice, food quality good

Single Breakfast bar for breakfast was pretry minimal

PHL
LHR
Excellent 10.0

The personnel were most helpful, pleasant, and reassuring when I discovered I had left something on the plane. It was found and returned to me quite promptly and my continued flight was rebooked with the minimum of fuss (and embarrassment). Everyone was wonderful.

I am not a seasoned traveller. Checking for a small item (such as a passport) in the overhead compartment was not possible.

Mon, 26 Mar
PHL
LHR
9h 30m
Wed, 4 Apr
LHR
PHL
11h 15m
£493
Trip: 10 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4137 reviews
Overall
7.6
Boarding
7.7
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.9
BCN
DUB
Good 6.0

I don't understand why they have to charge for water, coffee or tea. These are basic beverages.

DUB
ORD
Good 6.0

There were 3 travelers in our family and we were not seated together. I assumed the flight was full but to our surprise there were empty seats that would allow us to be together. Serving of meals and drinks were slow although the food was better this time compared to our Chicago to Dublin trip. Movie selections were poor.

BOS
SNN
Good 7.0

Tail winds shortened the flying time by 45 minutes

seats... no space menu.... skip it movie choice ... fair at best

DUB
MAN
Excellent 10.0

Left on time and arrived early

Nothing

DUB
CDG
Excellent 10.0

Free-for-all boarding was less than ideal. Boarding by seat rows as on Boston to Dublin flight would have been better.

Tue, 6 Mar
PHL
LGW
13h 50m
Wed, 14 Mar
LGW
PHL
24h 16m
£448
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 16 Feb
PHL
LHR
31h 55m
Mon, 19 Feb
LHR
PHL
13h 50m
£481
Trip: 4 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 50 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
PHL
LHR
Good 7.3

Crew was nice, food quality good

Single Breakfast bar for breakfast was pretry minimal

PHL
LHR
Excellent 8.6

Crew was good, attentive, helpful, eager to accommodate. The tea cart sped past without alerting anybody as to what it was or that it wasn't going to come back but moments later another crew member came by and was very quick to return with a tea for me, which was nice of them. Other flight operators have had somewhat limited entertainment options, I was amazed by the range available.

I was a little disappointed that in the video options, while it had he show Legion (something I'd been recommended by a friend recently), it was only the first 4 episodes instead of the complete 8, leaving a cliffhanger point in the story. Which was a bit of a shame.

PHL
LHR
OK 5.3

Flight attendant were pleasant

Small seats and little leg room....and I have short legs

PHL
LHR
OK 4.0

It wasn't a BA flight, but AA. Confusion reigns!

PHL
LHR
OK 5.6

Food was good.

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. .

Wed, 28 Mar
PHL
LHR
9h 30m
Wed, 4 Apr
LHR
PHL
11h 15m
£493
Trip: 8 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4137 reviews
Overall
7.6
Boarding
7.7
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.9
BOS
SNN
Good 7.0

Tail winds shortened the flying time by 45 minutes

seats... no space menu.... skip it movie choice ... fair at best

BOS
DUB
Excellent 10.0

Was exceptionally impressed that the cabin crew made a cabin-wide announcement concerning a passenger with a peanut allergy. Other airlines could learn a lot in this department. Keep up the good work!

DUB
CDG
Excellent 10.0

Free-for-all boarding was less than ideal. Boarding by seat rows as on Boston to Dublin flight would have been better.

JFK
DUB
Excellent 8.0

I had a good flight. No complaints.

YYZ
DUB
Excellent 8.0

Great seats plenty of leg room

The food... Yikes

Tue, 13 Feb
PHL
LGW
23h 10m
Wed, 14 Mar
LGW
PHL
24h 16m
£450
Trip: 29 days
Overall 0.0 Poor
Based on 0 reviews
Thu, 22 Feb
PHL
LHR
31h 15m
Sun, 25 Feb
LHR
PHL
13h 50m
£481
Trip: 4 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 50 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
PHL
LHR
Excellent 8.6

Crew was good, attentive, helpful, eager to accommodate. The tea cart sped past without alerting anybody as to what it was or that it wasn't going to come back but moments later another crew member came by and was very quick to return with a tea for me, which was nice of them. Other flight operators have had somewhat limited entertainment options, I was amazed by the range available.

I was a little disappointed that in the video options, while it had he show Legion (something I'd been recommended by a friend recently), it was only the first 4 episodes instead of the complete 8, leaving a cliffhanger point in the story. Which was a bit of a shame.

PHL
LHR
OK 4.3

I thought I was supposed to get a free meal and was never offered that or even a complimentary beverage. The flight attendants allowed a group of four passenger to stand during almost the entire flight in the aisles and in my row, making it difficult for people to get around them and didn't allow for an enjoyable flying experience.

PHL
LHR
Mediocre 2.0

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

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
OK 4.0

It wasn't a BA flight, but AA. Confusion reigns!

PHL
LHR
Mediocre 2.6

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, 1 Apr
PHL
LHR
10h 30m
Mon, 9 Apr
LHR
PHL
13h 25m
£494
Trip: 9 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4137 reviews
Overall
7.6
Boarding
7.7
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.9
DUB
JFK
Good 6.3

average to below average

robbery for a small glass of wine - $8

DUB
MCO
Excellent 10.0

Even if Aer LIngus is considered a low cost, I felt it was everything but that. The plane looked new, the board computers were modern and had the latest movies, there were charging docks for phones and even internet. We got to Orlando 30 minutes ahead of schedule, which was great!

DUB
MAN
Excellent 10.0

Left on time and arrived early

Nothing

LHR
DUB
Good 6.3

I had a changeable ticket but could only do so a 1counter. Missed earlier flight as a result. Terrible service. At Dublin airport going out they let me change at the gate. Bot not in Heathrow.

BOS
DUB
Excellent 10.0

Was exceptionally impressed that the cabin crew made a cabin-wide announcement concerning a passenger with a peanut allergy. Other airlines could learn a lot in this department. Keep up the good work!

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