Find Cheap Flights from London Heathrow to Philadelphia (LHR - PHL)

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Good to Know

Low Season:
February
Best time to beat the crowds
4%
expected price decrease
High Season:
August
Most popular time to fly
20%
expected price increase
Average Price:
$1135
(avg. price over the last 2 weeks)
Good Deal:
$695
or less (round trip)

When to Book Flights from London Heathrow to Philadelphia

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 $695 or less.
The cheapest flight from London Heathrow to Philadelphia was found 69 days before departure, on average.
Book at least 2 weeks before departure in order to get a below-average price.
High season is considered to be July, August and September. The cheapest month to fly is February.
Morning departure is around 14% more expensive 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 London Heathrow to Philadelphia Flights

How long does a flight from London Heathrow to Philadelphia take?
An average nonstop flight takes 8h 30m, covering a distance of 3535 miles.
How many flights are there between London Heathrow and Philadelphia?
There are 340 (nonstop) flights between London Heathrow and Philadelphia per week, averaging 48 per day.
Which airlines provide the cheapest flights from London Heathrow to Philadelphia?
In the past 3 days, the cheapest round-trip tickets were found on Icelandair ($517), Virgin Atlantic ($583) and Aer Lingus ($632).
Do I need a passport to fly between London Heathrow and Philadelphia?
Yes.
Which airlines fly most frequently between London Heathrow and Philadelphia?
Iberia (7 times daily), American Airlines (6 times daily), Finnair (6 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly London Heathrow to Philadelphia?
For London Heathrow to Philadelphia, Monday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Philadelphia back to London Heathrow, the best deals are generally found on Wednesday, with Saturday being the most expensive.

Book cheap flights from London Heathrow to Philadelphia (round-trip)

Airports
Origin
London
$517
only
$517
Destination
Philadelphia
$517
only
$517
Mon, Jun 4
LHR
PHL
27h 05m
Thu, Jun 7
PHL
LHR
10h 10m
Trip: 4 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6697 reviews
Overall
7.6
Boarding
7.3
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.3
YVR
KEF
Okay 5.6

The opportunity to check in on line thanks to you Kayak

KEF
EWR
Mediocre 2.8

My entertainment system stopped working 1/2 way through the flight and there was very little leg room that caused back pain

KEF
SEA
Okay 4.0

Nothing!!

No food served, not even little package of peanuts. Asked for juice and was served water instead. Not good for 7.5 hours on a small cramped fully booked plane. Entertainment was not up to date or interesting. Flight attendant bumped me numerous times and no apology, I wasn't sticking out into the aisle. Boarding was delayed and not told why.

BOS
KEF
Good 7.6

They provided a pillow and blanket which was very nice, and the crew were helpful in finding space for items during take-off and landing. The boarding and exiting were fairly quick.

Everything on board costs extra, including basic drinks and snacks, but that's to be expected on cheaper flights. I assumed that the inflight movies cost money as well, although I didn't watch any because I didn't have headphones.

MUC
KEF
Mediocre 2.0

Arrived late Impatient flight attendant Cramped

Tue, Mar 6
LHR
PHL
8h 30m
Sat, Mar 24
PHL
LHR
9h 35m
Trip: 18 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 1055 reviews
Overall
8.1
Boarding
8.2
Comfort
7.7
Crew
8.5
Entertainment
8.0
Food
7.7
LAX
SYD
Good 7.6

Flight attendants were excellent!

No indication of where to go to get to connecting flight. Luckily we had 2 1/2 hours to find the flight.

EWR
LHR
Okay 4.3

The onboard crew were lovely.

Stood at check in for over 30 mins with no staff in sight. Boarding was a disaster. Staff was not prepared nor organized and the crowds were unbearable. Upgraded seats were laughable and not worth an extra $60. Food was mediocre. Entertainment would have been good but GE touchscreens are so old, they were difficult to work.

MEL
AKL
Good 6.3

Great crew, easy boarding, comfortable enough flight

Could have used a charger for electronics, especially because we were expected to use our own device for entertainment. Didn't order food, but didn't look digestible

LHR
LOS
Excellent 9.0

The personal care and attention.

Old movies and few entertainment choices

LAX
LHR
Excellent 9.6

Nice airline, great crew and service.

Leg room and space was great but the seats could use some more cushion.

Fri, May 18
LHR
PHL
11h 15m
Sat, Jun 2
PHL
LHR
10h 30m
Trip: 16 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4231 reviews
Overall
7.6
Boarding
7.7
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.9
DUB
YYZ
Okay 4.0

Having had bad experiences with Aer Lingus before, I was hesitant to book with Aer Lingus again. But sadly, I was booking this flight last minute and had no other option. The route was Dublin to Calgary, via Toronto. I left myself plenty of time im Toronto to clear customs as I know it can take a while. The day of, the flight ended up being 1.5 hours longer than usual due to headwinds, leaving me with only 2.5 hours in Toronto. I ended up waiting 2 hours and 15 minutes for my bag and missing my connecting flight (my sister who was also on the same flight received hers in 30 mins and made the flight). Westjet was wonderful and put me on a later flight but Aer Lingus didn't have any assistance for me.

Aer Lingus lost my sister's luggage going to Ireland and never contacted my sister once the luggage was found. She only received it the day we flew back to Calgary. Poor customer service when inquiring about the bag, no compensation for necessities purchased.

DUB
HAM
Okay 5.6

The plane was just fantastic: comfortable, elegant, quiet. Gets the best note!

A free coffee - which was excellent by the way - and a little roll would have been nice.

LHR
DUB
Excellent 8.0

Staff and service

DUB
JFK
Excellent 10.0

All worked smoothly

Service and friendliness

DUB
LHR
Excellent 8.0

Could not check in on-line from Dublin on either Air canada or Aer Linguis websites. Time to sort out this long-standing problem

Sun, Apr 29
LHR
PHL
26h 50m
Mon, May 14
PHL
LHR
7h 35m
Trip: 16 days
7.7GoodShow reviews
Overall 7.7 Good
Based on 69 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
LHR
PHL
Excellent 9.6

I flew economy. We left the gate on time, the seat was comfortable, entertainment was varied, flight attendants that I came in contact with were professional and pleasant, food was hot and very good, pilots got me where I wanted to go, and that little container of ice cream - oh I love it! The plane was not completely full, which made the seating more comfortable than it would have been if the plane was full.

I was ushered into what became a very slow line to board. The employee at the end of my line had to deal with a few problems so I ended up boarding close to the end, behind those with higher group boarding numbers than I. Having a single line up to the two boarding employees, would avoid that, albeit make a longer line to begin with.

LHR
PHL
Good 7.3

Otherwise great flight experience...

But touchscreens were so unresponsive to touch it was almost impossible to navigate between movies.

LHR
PHL
Excellent 8.0

Seat was good and staff were pleasant and attentive.

In-flight music selection could have been better.

LHR
PHL
Excellent 8.3

The crew could not have been better. I was really pleased with the movie selection. However, the food is really terrible. I got a dish that was chicken, mashed potatoes and green beans, which would have been acceptable had it not been covered in bbq sauce.

LHR
PHL
Okay 4.3

Made it home in one piece

Business Seat power / entertainment system went out with about 2.5 hours to go. Crew didn't seem surprised and they were pretty relaxed about it. Every time I asked about status during the first hour or so after it was out they said they were rebooting system but nothing happened. Finally gave up on it. Was the "deconstructed burrito" supposed to be served cold/frozen? Warm or at room temp. would have worked better Luggage took good hour before it started unloading

Mon, Apr 30
LHR
PHL
10h 40m
Mon, May 14
PHL
LHR
7h 05m
Trip: 15 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 98 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
LHR
PHL
Good 6.3

We landed on time.

This was the first time I every flew on BA. I had higher expectations than the reality of the trip. I was told by a traveler that alcoholic drinks were gratis. However, other than the one time the cart passed through no offer was made. I guess you had to buzz for a drink. I expected water to be handed out in the cabin more frequently than it was. Food was inedible. Again, I thought BA had a better reputation. Leg room was tight. Other airlines offer more.

LHR
PHL
Good 7.2

Salad was slimy and clearly not fresh. Food was not great.

LHR
PHL
Good 6.0

We got there safely...

Cabin crew were not very helpful. Onboard entertainment kept going off. The plane was very old and smelt. The aircon kept on dripping on me.

LHR
PHL
Mediocre 2.0

Flight was on time and smooth

Television screens went off in the first hour of flight and never came back on. They ran out of the vegetarian pasta dish, because of this my kids didn't eat. Service overall was poor.

LHR
PHL
Excellent 10.0

The entertainment (TV in each seat) was great. The food was outstanding (chicken with risotto and beet salad), and so was the service. This was the best British Airways flight I've ever been on!

Nothing!

Wed, Jul 4
LHR
PHL
12h 05m
Mon, Jul 9
PHL
LHR
7h 25m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 31
LHR
PHL
11h 10m
Sun, Jun 3
PHL
LHR
10h 10m
Trip: 4 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6697 reviews
Overall
7.6
Boarding
7.3
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.3
KEF
CPH
Excellent 9.3

Iceland air have a good product. They fly 757 and 767s that are clean and well maintained. Staff is very helpful, I changed over a flight during the layover in KEF and it was flawless, I got my checked bag as promised in CPH which was quite well done. So, they went out of their way to accommodate me. KEF does great with passport control and the lounge there is very nice.

KEF is a busy airport, always at capacity for travelers. Depending on the season it is hard to find a seat at the airport let alone the gate. During summer it is hard to even walk thru the airport. Depending on your abilities, give yourself time to get to the gate.

KEF
MUC
Okay 5.0

Legroom is above average, but at expense of seat comfort. Food is good but expensive. Crews were attentious and courteous, but not a strong differential from other airlines. Entertainment was good and easy to access.

Boarding in all of our 4 flights was chaotic and a combination of lack of organization from Icelandair and discipline from passengers. Space for boarding is scarce and confined. And when they call half of all passengers of a full 757 or 767 to board at the same time... the law of the jungle is stablished. Even with just a little more effort and organization from the airline it would be possible to make this a better experience for all passengers. Be aware of what you are told when you buy your tickets. They sold economy tickets to us and then charged a lot for bags telling us our tickets were economy light, even with their own receipts or tickets not mentioning anything about light on them.

KEF
ARN
Okay 4.6

The seats were roomy and comfy and I was glad I didn’t have to pay extra for a seat like other airlines.

Boarding was very confusing and the customers reacted by plowing Willynilly down the ramp nano seconds after the physically challenged were wheeled on to the plane ignoring the airline staff at the gate. I went with the flow praying I would not get arrested. We boarded a total of 40min late . Second if I am paying for my baggage I should not have to wait 30-40 min for them to come out at baggage claim.

BRU
KEF
Excellent 10.0

My exit aisle seat was just great, with no one on either side of me !!!!! Very kind airplane staff. I had a great sleep.

nothing

KEF
BOS
Excellent 8.6

Crew was friendly, like the bigger plane and direct flight.

Luggage fees!!!

Wed, Apr 25
LHR
PHL
11h 15m
Wed, May 2
PHL
LHR
9h 30m
Trip: 8 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4231 reviews
Overall
7.6
Boarding
7.7
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.9
YYZ
DUB
Excellent 8.3

I flew overnight from Toronto, Canada to Dublin and had a relatively pleasant experience. The food and drink trolleys came by quite quickly and frequently, and the food exceeded my expectations. The crew was friendly, for the most part. Boarding certainly could've been smoother... But overall, I'd fly Aer Lingus again for an overseas trip.

DUB
JFK
Excellent 10.0

All worked smoothly

Service and friendliness

EWR
DUB
Good 6.6

The Crew was lovely on the Transatlantic flight. The Dublin-HH crew was polite, one older lady was warm. Of course I would have like free wine, but I imagine many passengers might abuse the offer...

Narrow seats, not spacy feet place (fortunately a nice gentleman in the middle of us, 2 people, found a seat with more space - he was a very long and not too skinny man. Only 3 toilets for both isles of passengers on a TRANSATLANTIC flight.

DUB
YYZ
Okay 4.0

Having had bad experiences with Aer Lingus before, I was hesitant to book with Aer Lingus again. But sadly, I was booking this flight last minute and had no other option. The route was Dublin to Calgary, via Toronto. I left myself plenty of time im Toronto to clear customs as I know it can take a while. The day of, the flight ended up being 1.5 hours longer than usual due to headwinds, leaving me with only 2.5 hours in Toronto. I ended up waiting 2 hours and 15 minutes for my bag and missing my connecting flight (my sister who was also on the same flight received hers in 30 mins and made the flight). Westjet was wonderful and put me on a later flight but Aer Lingus didn't have any assistance for me.

Aer Lingus lost my sister's luggage going to Ireland and never contacted my sister once the luggage was found. She only received it the day we flew back to Calgary. Poor customer service when inquiring about the bag, no compensation for necessities purchased.

BOS
DUB
Excellent 9.6

Girl sitting beside me!

Guy sitting behind me!

Wed, Aug 15
LHR
PHL
27h 05m
Tue, Sep 4
PHL
LHR
18h 35m
Trip: 21 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6697 reviews
Overall
7.6
Boarding
7.3
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.3
YVR
KEF
Okay 5.6

The opportunity to check in on line thanks to you Kayak

CDG
KEF
Excellent 9.3

Food options

KEF
SEA
Okay 4.0

Nothing!!

No food served, not even little package of peanuts. Asked for juice and was served water instead. Not good for 7.5 hours on a small cramped fully booked plane. Entertainment was not up to date or interesting. Flight attendant bumped me numerous times and no apology, I wasn't sticking out into the aisle. Boarding was delayed and not told why.

BRU
KEF
Excellent 10.0

My exit aisle seat was just great, with no one on either side of me !!!!! Very kind airplane staff. I had a great sleep.

nothing

KEF
BOS
Excellent 8.6

Crew was friendly, like the bigger plane and direct flight.

Luggage fees!!!

Sat, Aug 11
LHR
PHL
27h 05m
Thu, Aug 23
PHL
LHR
18h 35m
Trip: 13 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6697 reviews
Overall
7.6
Boarding
7.3
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.3
BOS
KEF
Good 7.6

They provided a pillow and blanket which was very nice, and the crew were helpful in finding space for items during take-off and landing. The boarding and exiting were fairly quick.

Everything on board costs extra, including basic drinks and snacks, but that's to be expected on cheaper flights. I assumed that the inflight movies cost money as well, although I didn't watch any because I didn't have headphones.

CDG
KEF
Excellent 9.3

Food options

YVR
KEF
Okay 5.6

The opportunity to check in on line thanks to you Kayak

KEF
OSL
Excellent 8.0

We were ahead of schedule, which was nice

KEF
SEA
Okay 4.0

Nothing!!

No food served, not even little package of peanuts. Asked for juice and was served water instead. Not good for 7.5 hours on a small cramped fully booked plane. Entertainment was not up to date or interesting. Flight attendant bumped me numerous times and no apology, I wasn't sticking out into the aisle. Boarding was delayed and not told why.

Sat, Jul 7
LHR
PHL
27h 05m
Sat, Jul 28
PHL
LHR
18h 35m
$1027
Trip: 22 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6697 reviews
Overall
7.6
Boarding
7.3
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.3
KEF
OSL
Excellent 8.0

We were ahead of schedule, which was nice

KEF
BOS
Excellent 8.6

Crew was friendly, like the bigger plane and direct flight.

Luggage fees!!!

KEF
SEA
Okay 4.0

Nothing!!

No food served, not even little package of peanuts. Asked for juice and was served water instead. Not good for 7.5 hours on a small cramped fully booked plane. Entertainment was not up to date or interesting. Flight attendant bumped me numerous times and no apology, I wasn't sticking out into the aisle. Boarding was delayed and not told why.

KEF
CPH
Excellent 9.3

Iceland air have a good product. They fly 757 and 767s that are clean and well maintained. Staff is very helpful, I changed over a flight during the layover in KEF and it was flawless, I got my checked bag as promised in CPH which was quite well done. So, they went out of their way to accommodate me. KEF does great with passport control and the lounge there is very nice.

KEF is a busy airport, always at capacity for travelers. Depending on the season it is hard to find a seat at the airport let alone the gate. During summer it is hard to even walk thru the airport. Depending on your abilities, give yourself time to get to the gate.

YVR
KEF
Okay 5.6

The opportunity to check in on line thanks to you Kayak

Show more results

London Heathrow to Philadelphia Flight Information

Flights Arrive in Philadelphia
Flights Depart from London Heathrow
Flight Price $517
Distance 3535 miles
Airlines Icelandair, Virgin Atlantic, Aer Lingus, American Airlines, British Airways
*
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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.