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

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Sat 11/18
Sat 11/25
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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:
$1594
(avg. price over the last 2 weeks)
Good Deal:
$1594
or less (round trip)

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

The cheapest flight from Philadelphia to London was found 76 days before departure, on average.
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 26% 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 nonstop flight takes 7h 15m, covering a distance of 3548 miles.
How many flights are there between Philadelphia and London?
There are 191 (nonstop) flights between Philadelphia and London per week, averaging 27 per day.
Which airlines provide the cheapest flights from Philadelphia to London?
In the past 3 days, the cheapest round-trip tickets were found on Icelandair ($448), Multiple Airlines ($478) and Virgin Atlantic ($521).
Do I need a passport to fly between Philadelphia and London?
Yes.
Which airlines fly most frequently between Philadelphia and London?
American Airlines (3 times daily), Finnair (3 times daily), Delta (3 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Philadelphia to London?
For Philadelphia to London, Tuesday is the cheapest day to fly on average and Thursday is the most expensive. Flying from London back to Philadelphia, the best deals are generally found on Saturday, with Friday being the most expensive.

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

Airports
Origin
Philadelphia
$448
only
$448
Destination
London
$448
only
$448
$480
only
$480
$478
only
$478
Tue, May 22
PHL
LHR
10h 10m
Mon, Jun 4
LHR
PHL
27h 05m
Trip: 14 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6243 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
LGW
KEF
Excellent 8.3

After a long journey overall, it was nice to have an easy plane ride to Iceland!

N/A

KEF
IAD
Mediocre 3.6

I made it home with my luggage.

Absolutely chaos boarding, seats way to close together in both width and length. They had open seats with more room, told me I couldn’t move seats but let others. Each leg of the flight the pilots landed like the plane fell out of the sky! The crew was yet again nowhere to be found during the flight. They do offer food for sale during the flight but it’s at outrageous Icelandic prices!! Never again!!!

KEF
EWR
Good 7.3

It was a smooth flight and the crew were quite attentive.

I didn't like the confusion of boarding. We stood in a long line for quite a while before boarding began. There were three other lines going to other destinations, which made it confusing and packed with people. Check in was a little stressful as well. Due to a belt malfunction, we had to wait in line for a long time without any information. Once we were able to check our bags, my husband's bag was declined. We had to wait in another line before finally getting the go ahead to go to customs. For the amount of money I paid, I thought a snack would have been provided.

HEL
KEF
Excellent 10.0

Crew very nice, food delicious and nutritious

KEF
CPH
Mediocre 2.0

Flight was canceled and I had to find out through twitter, they never called me about it until two hours before my new flight that they had put me on. Couldn't even reach them by phone. The calls would drop each time.

Thu, Nov 30
PHL
STN
54h 55m
Wed, Dec 6
STN
PHL
51h 01m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Mar 1
PHL
LHR
7h 15m
Sun, Mar 11
LHR
PHL
8h 30m
Trip: 11 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 920 reviews
Overall
8.1
Boarding
8.3
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
LAX
SYD
Excellent 10.0

Met expectations.

Things out of your control - time !!

SEA
LHR
Excellent 8.6

Reasonably comfortable for a long jet ride. Helpful and considerate flight attendants.

The strange windows that kept it looking like night out until 30 minutes before we landed. I prefer the natural light to help readjust my time zones.

LHR
LAX
Excellent 9.6

The crew was friendly and professional, the food was good and offered frequently due to the long flight time (10.5 hours). The plane was comfortable even though nearly full. Overall, it was a good experience and I would definitely fly with Virgin Atlantic again.

LAX
LHR
Mediocre 2.0

No one would update that the flight was delayed. They would not even communicate as to why delayed and would not put us in a different flight. Absolutely no customer service. Disappointed and would not fly jet airways again . I missed my conference lecture today as I was late.

No communication, nor will they tell you why it's late . Nor will they move you to another flight even wen requested

SFO
LHR
Excellent 10.0

Efficient, friendly, on-time!

Tue, May 22
PHL
LGW
10h 00m
Thu, May 31
LGW
PHL
11h 05m
Trip: 10 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6243 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
BOS
Mediocre 2.0

Iceland Air itself is fine.

I had to buy the tickets through JustFly, which is an absolute scam and bilked me out of $750.

KEF
CPH
Mediocre 2.0

Flight was canceled and I had to find out through twitter, they never called me about it until two hours before my new flight that they had put me on. Couldn't even reach them by phone. The calls would drop each time.

LGW
KEF
Excellent 8.3

After a long journey overall, it was nice to have an easy plane ride to Iceland!

N/A

KEF
EWR
Good 7.3

It was a smooth flight and the crew were quite attentive.

I didn't like the confusion of boarding. We stood in a long line for quite a while before boarding began. There were three other lines going to other destinations, which made it confusing and packed with people. Check in was a little stressful as well. Due to a belt malfunction, we had to wait in line for a long time without any information. Once we were able to check our bags, my husband's bag was declined. We had to wait in another line before finally getting the go ahead to go to customs. For the amount of money I paid, I thought a snack would have been provided.

HEL
KEF
Excellent 10.0

Crew very nice, food delicious and nutritious

Thu, Nov 30
PHL
STN
54h 55m
Thu, Dec 7
STN
PHL
56h 26m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 31
PHL
LGW
10h 10m
Tue, Jun 5
LGW
PHL
11h 05m
Trip: 6 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6243 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
BOS
KEF
Mediocre 2.0

Tried to reschedule flight just a few days later because of a friend's wedding. It would have cost more in fees to reschedule the flight than it cost in the first place, and THEN I would have had to pay for an entirely new flight. JustFly was absolutely awful to work with and showed neither remorse nor compassion.

LGW
KEF
Good 6.0

The lights in the cabin were great set up to look like the Aurora

Offered 1 drink and no snack. Rarely do you see the crew on their flights

KEF
IAD
Mediocre 3.6

I made it home with my luggage.

Absolutely chaos boarding, seats way to close together in both width and length. They had open seats with more room, told me I couldn’t move seats but let others. Each leg of the flight the pilots landed like the plane fell out of the sky! The crew was yet again nowhere to be found during the flight. They do offer food for sale during the flight but it’s at outrageous Icelandic prices!! Never again!!!

KEF
CPH
Mediocre 2.0

Flight was canceled and I had to find out through twitter, they never called me about it until two hours before my new flight that they had put me on. Couldn't even reach them by phone. The calls would drop each time.

ORD
KEF
Excellent 8.0

The experience was fine other than I was surprised for an international flight I had to buy food.

Thu, Nov 30
PHL
STN
54h 55m
Sun, Dec 3
STN
PHL
54h 16m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 31
PHL
LHR
10h 10m
Sat, Jun 9
LHR
PHL
27h 05m
Trip: 10 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6243 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
ORD
KEF
Good 7.0

Such a short connection time. 45 minutes does not allow for much margin of error.

HEL
KEF
Excellent 10.0

Crew very nice, food delicious and nutritious

LGW
KEF
Excellent 8.3

After a long journey overall, it was nice to have an easy plane ride to Iceland!

N/A

KEF
IAD
Mediocre 3.6

I made it home with my luggage.

Absolutely chaos boarding, seats way to close together in both width and length. They had open seats with more room, told me I couldn’t move seats but let others. Each leg of the flight the pilots landed like the plane fell out of the sky! The crew was yet again nowhere to be found during the flight. They do offer food for sale during the flight but it’s at outrageous Icelandic prices!! Never again!!!

KEF
BOS
Mediocre 2.0

Iceland Air itself is fine.

I had to buy the tickets through JustFly, which is an absolute scam and bilked me out of $750.

Mon, Dec 11
PHL
STN
41h 30m
Mon, Dec 18
STN
PHL
56h 31m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Dec 11
PHL
STN
41h 30m
Sun, Dec 17
STN
PHL
54h 26m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 31
PHL
LGW
10h 10m
Sat, Jun 9
LGW
PHL
11h 05m
Trip: 10 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6243 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
EWR
Good 7.3

It was a smooth flight and the crew were quite attentive.

I didn't like the confusion of boarding. We stood in a long line for quite a while before boarding began. There were three other lines going to other destinations, which made it confusing and packed with people. Check in was a little stressful as well. Due to a belt malfunction, we had to wait in line for a long time without any information. Once we were able to check our bags, my husband's bag was declined. We had to wait in another line before finally getting the go ahead to go to customs. For the amount of money I paid, I thought a snack would have been provided.

LGW
KEF
Excellent 8.3

After a long journey overall, it was nice to have an easy plane ride to Iceland!

N/A

KEF
CPH
Mediocre 2.0

Flight was canceled and I had to find out through twitter, they never called me about it until two hours before my new flight that they had put me on. Couldn't even reach them by phone. The calls would drop each time.

ORD
KEF
Good 7.0

Such a short connection time. 45 minutes does not allow for much margin of error.

KEF
BOS
Mediocre 2.0

Iceland Air itself is fine.

I had to buy the tickets through JustFly, which is an absolute scam and bilked me out of $750.

Tue, May 22
PHL
LGW
10h 00m
Sat, Jun 2
LGW
PHL
11h 05m
Trip: 12 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6243 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
CPH
Mediocre 2.0

Flight was canceled and I had to find out through twitter, they never called me about it until two hours before my new flight that they had put me on. Couldn't even reach them by phone. The calls would drop each time.

ORD
KEF
Excellent 8.0

The experience was fine other than I was surprised for an international flight I had to buy food.

LGW
KEF
Excellent 8.3

After a long journey overall, it was nice to have an easy plane ride to Iceland!

N/A

KEF
EWR
Good 7.3

It was a smooth flight and the crew were quite attentive.

I didn't like the confusion of boarding. We stood in a long line for quite a while before boarding began. There were three other lines going to other destinations, which made it confusing and packed with people. Check in was a little stressful as well. Due to a belt malfunction, we had to wait in line for a long time without any information. Once we were able to check our bags, my husband's bag was declined. We had to wait in another line before finally getting the go ahead to go to customs. For the amount of money I paid, I thought a snack would have been provided.

KEF
IAD
Mediocre 3.6

I made it home with my luggage.

Absolutely chaos boarding, seats way to close together in both width and length. They had open seats with more room, told me I couldn’t move seats but let others. Each leg of the flight the pilots landed like the plane fell out of the sky! The crew was yet again nowhere to be found during the flight. They do offer food for sale during the flight but it’s at outrageous Icelandic prices!! Never again!!!

Sat, Dec 2
PHL
STN
50h 38m
Wed, Dec 6
STN
PHL
51h 01m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Dec 6
PHL
STN
50h 38m
Tue, Dec 12
STN
PHL
56h 36m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 31
PHL
LGW
10h 10m
Thu, Jun 7
LGW
PHL
11h 05m
Trip: 8 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6243 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
ORD
KEF
Excellent 8.0

The experience was fine other than I was surprised for an international flight I had to buy food.

KEF
EWR
Good 7.3

It was a smooth flight and the crew were quite attentive.

I didn't like the confusion of boarding. We stood in a long line for quite a while before boarding began. There were three other lines going to other destinations, which made it confusing and packed with people. Check in was a little stressful as well. Due to a belt malfunction, we had to wait in line for a long time without any information. Once we were able to check our bags, my husband's bag was declined. We had to wait in another line before finally getting the go ahead to go to customs. For the amount of money I paid, I thought a snack would have been provided.

LGW
KEF
Good 6.0

The lights in the cabin were great set up to look like the Aurora

Offered 1 drink and no snack. Rarely do you see the crew on their flights

LGW
KEF
Excellent 8.3

After a long journey overall, it was nice to have an easy plane ride to Iceland!

N/A

HEL
KEF
Excellent 10.0

Crew very nice, food delicious and nutritious

Mon, Dec 11
PHL
STN
41h 30m
Thu, Dec 14
STN
PHL
54h 26m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 31
PHL
LHR
10h 10m
Sun, Jun 10
LHR
PHL
11h 05m
Trip: 11 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6243 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
EWR
Good 7.3

It was a smooth flight and the crew were quite attentive.

I didn't like the confusion of boarding. We stood in a long line for quite a while before boarding began. There were three other lines going to other destinations, which made it confusing and packed with people. Check in was a little stressful as well. Due to a belt malfunction, we had to wait in line for a long time without any information. Once we were able to check our bags, my husband's bag was declined. We had to wait in another line before finally getting the go ahead to go to customs. For the amount of money I paid, I thought a snack would have been provided.

LGW
KEF
Excellent 8.3

After a long journey overall, it was nice to have an easy plane ride to Iceland!

N/A

LGW
KEF
Good 6.0

The lights in the cabin were great set up to look like the Aurora

Offered 1 drink and no snack. Rarely do you see the crew on their flights

ORD
KEF
Excellent 8.0

The experience was fine other than I was surprised for an international flight I had to buy food.

KEF
BOS
Mediocre 2.0

Iceland Air itself is fine.

I had to buy the tickets through JustFly, which is an absolute scam and bilked me out of $750.

Thu, Dec 14
PHL
STN
59h 45m
Mon, Dec 18
STN
PHL
56h 31m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Nov 30
PHL
STN
54h 55m
Mon, Dec 4
STN
PHL
40h 46m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 31
PHL
LGW
10h 10m
Sun, Jun 10
LGW
PHL
11h 05m
Trip: 11 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6243 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
IAD
Mediocre 3.6

I made it home with my luggage.

Absolutely chaos boarding, seats way to close together in both width and length. They had open seats with more room, told me I couldn’t move seats but let others. Each leg of the flight the pilots landed like the plane fell out of the sky! The crew was yet again nowhere to be found during the flight. They do offer food for sale during the flight but it’s at outrageous Icelandic prices!! Never again!!!

ORD
KEF
Excellent 8.0

The experience was fine other than I was surprised for an international flight I had to buy food.

BOS
KEF
Good 6.6

Service of staff was sub par compared to other airlines serving Germany

KEF
EWR
Good 7.3

It was a smooth flight and the crew were quite attentive.

I didn't like the confusion of boarding. We stood in a long line for quite a while before boarding began. There were three other lines going to other destinations, which made it confusing and packed with people. Check in was a little stressful as well. Due to a belt malfunction, we had to wait in line for a long time without any information. Once we were able to check our bags, my husband's bag was declined. We had to wait in another line before finally getting the go ahead to go to customs. For the amount of money I paid, I thought a snack would have been provided.

KEF
CPH
Mediocre 2.0

Flight was canceled and I had to find out through twitter, they never called me about it until two hours before my new flight that they had put me on. Couldn't even reach them by phone. The calls would drop each time.

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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.