PHL - YXU

$547 Find Cheap Flights from Philadelphia to London

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to London departing on 9/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to London, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Philadelphia to London (PHL-YXU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to London

Thu, Sep 11 - Fri, Sep 12
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9:47 am - 5:12 amPHL-YXU
19h 25m2 stops
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8:00 pm - 9:46 amYXU-PHL
37h 46m3 stops
Thu, Sep 11 - Fri, Sep 12
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5:00 am - 5:12 amPHL-YXU
24h 12m3 stops
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8:00 pm - 9:46 amYXU-PHL
37h 46m3 stops
Fri, Oct 3 - Fri, Oct 10
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6:25 am - 5:12 amPHL-YXU
22h 47m2 stops
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8:00 pm - 11:25 pmYXU-PHL
27h 25m2 stops
Fri, Oct 3 - Fri, Oct 10
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9:50 pm - 5:12 amPHL-YXU
31h 22m3 stops
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8:00 pm - 11:25 pmYXU-PHL
27h 25m2 stops
Thu, Sep 11 - Fri, Sep 12
Air Canada Logo
10:35 am - 3:17 pmPHL-YXU
4h 42m1 stop
Air Canada Logo
6:10 am - 9:54 amYXU-PHL
3h 44m1 stop
$781Air Canada
Find Deal
Thu, Sep 11 - Fri, Sep 12
Air Canada Logo
4:50 pm - 9:29 pmPHL-YXU
4h 39m1 stop
Air Canada Logo
6:10 am - 2:38 pmYXU-PHL
8h 28m2 stops
$786Air Canada
Find Deal
Thu, Sep 11 - Fri, Sep 12
Air Canada Logo
9:20 am - 9:29 pmPHL-YXU
12h 09m2 stops
Air Canada Logo
6:10 am - 2:38 pmYXU-PHL
8h 28m2 stops
$815Air Canada
Find Deal
Fri, Sep 12 - Mon, Sep 15
Air Canada Logo
9:20 am - 9:29 pmPHL-YXU
12h 09m2 stops
Air Canada Logo
6:10 am - 2:38 pmYXU-PHL
8h 28m2 stops
$825Air Canada
Find Deal
Thu, Nov 27 - Mon, Dec 1
United Airlines Logo
10:05 am - 5:06 pmPHL-YXU
31h 01m2 stops
United Airlines Logo
5:40 pm - 12:07 pmYXU-PHL
18h 27m2 stops
$960United Airlines
Find Deal
Mon, Sep 1 - Thu, Sep 4
United Airlines Logo
1:03 pm - 3:02 pmPHL-YXU
25h 59m2 stops
United Airlines Logo
10:00 am - 11:56 amYXU-PHL
25h 56m2 stops
$1,218United Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Philadelphia to London flights

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

Which airlines provide the cheapest flights from Philadelphia to London?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Philadelphia to London were found on Air Canada ($781) and United Airlines ($960).

Good to know

Cheapest flight$547
Flight from Philadelphia to London

When to book flights from Philadelphia to London

Are your dates flexible? Find out the best times to travel from Philadelphia to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to London

  • What is the cheapest flight from Philadelphia to London?

    In the last 3 days, the lowest price for a flight from Philadelphia to London was $547 for a round-trip ticket.

  • Do I need a passport to fly between Philadelphia and London?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Philadelphia and on arrival in London.

  • Which airports will I be using when flying from Philadelphia to London?

    On your way to London, you’ll fly out from Philadelphia. You’ll be landing at London.

  • Which aircraft models fly most regularly from Philadelphia to London?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Philadelphia to London?

    Star Alliance is the only airline alliance operating flights between Philadelphia and London.

  • How does KAYAK find such low prices on flights from Philadelphia to London?

    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 London.

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

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

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and YXU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to London?

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

Reviews of the top airline flying from Philadelphia to London

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to London? 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.
7.1
Air CanadaOverall score based on 10000 reviews
7.1Comfort
6.8Entertainment
7.8Crew
6.3Food
7.3Boarding
Airline reviews

Check in staff was incredibly rude and condescending. When I arrived at the gate I had been charged $125 for a checked back. I did have or check a bag. When I brought this to the attention of the staff member who checked me in, she said that she made a mistake and there was nothing she could do about it. I asked her to remove the charge and refund credit card, she said she could not and that I had to call my credit card company to contest the charge. I called Air Canada customer support, was put on hold, after 43 minutes a received a messages stating customer service was overwhelmed with calls and was then hung up on.

2.0 MediocreAnonymous, Aug 2025JAX - YYZ
Read more Air Canada reviews

Check in staff was incredibly rude and condescending. When I arrived at the gate I had been charged $125 for a checked back. I did have or check a bag. When I brought this to the attention of the staff member who checked me in, she said that she made a mistake and there was nothing she could do about it. I asked her to remove the charge and refund credit card, she said she could not and that I had to call my credit card company to contest the charge. I called Air Canada customer support, was put on hold, after 43 minutes a received a messages stating customer service was overwhelmed with calls and was then hung up on.

Refreshments and Air Hostess was good. Issues with customs in Toronto caused flight to depart and left me behind twice. Vouchers for delayed flight needs to increase.

Plane was packed but flew on-time, and the comfort level was great! All planes are a bit cramped, but the in flight entertainment was superb, snacks were nice, and the crew was polite. Got into Calgary on schedule...all we could ask for

Long wait to check in at the priority counter in Toronto

I had no communication, receipt etc from Air Canada until hours before flight

I booked my flight months ago, and checked-in online about 12 hours before the flight. I received an email confirmation of check-in. I had no subsequent communication from Air Canada after my original booking. After arriving at the airport three hours before the flight, as instructed, I waited 90 minutes for an agent to appear to check my bag. I was informed that my flight had been canceled many weeks before, and that flight was no longer being run!! I showed a copy of my check-in confirmation, but no explanation could be found. I was placed on standby for the next flight and the connection. Luckily, those flights were not full and I arrived at my destination. I double checked my email, but I received no update about the flight from Air Canada until the day of the flight.

I was forcefully re-routed to another destination and was delayed a total of 8hours. I have still not received my bags, no one is taking responsibility. The agents at the airport lied to me that I will get to my destination same time as my previous flight where I was forcefully re-routed from.

Flight was delayed by 1.5hrs. Once inside, people had their small handbags on the storage. The crew (male guy) was not helpful in making some space in the storage. Instead, he asked few bags to be checked-in and it was not a great experience. No attempt to help but just followed the things with a straight face. People had their literally small bags and he wouldnt not move from one storage to another even if there was space and would not let us do i as well. Once flight was on, they ran out of Orange juice, really running out of orange juice when the temp were 32.degrees outside. didnt made the sense. Onasking for a extra snack, he made a face as if he was giving me out of his pocket. if the flight was delayed, there could have an attempt to provide something extra incase people did asked.

Our flight was canceled at the last minute. Someone on the flight said the exact same thing happened to her the day before. I will say they helped us book a flight on another airline so that we could still make our vacation with little delay.

We had a very long delay. First the inbound flight took a while, then maintenance, they “fixed it” to then do boarding and leave the gate, and waste a lot of time to have to go back to the gate and eventually deplane. Had to wait for a new aircraft, wait for a gate, and do the whole thing again. Instead of leaving at 9:50am we left until past 1. I could’ve not woken up at 5am, or spend some more time with my family if they gave more grace period of time between flights to give some time in case of any issues. But they have to make all and every dollar possible

Everything you need to know for your flight from Philadelphia to London

Information on your arrival and departure airports

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