PHL - YXU

$385 Find Cheap Flights from Philadelphia to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to London departing on 10/30. 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

Fri, Oct 31 - Fri, Nov 7
United Airlines Logo
3:48 pm - 9:21 pmPHL-YXU
29h 33m2 stops
United Airlines Logo
5:45 am - 11:09 pmYXU-PHL
17h 24m2 stops
$840United Airlines
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Fri, Oct 31 - Fri, Nov 7
Multiple Airlines Logo
9:55 pm - 8:12 pmPHL-YXU
46h 17m3 stops
Multiple Airlines Logo
8:10 pm - 12:32 amYXU-PHL
28h 22m3 stops
$888Multiple Airlines
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Fri, Oct 31 - Fri, Nov 7
Air Canada Logo
4:35 pm - 9:21 pmPHL-YXU
4h 46m1 stop
Air Canada Logo
9:25 am - 3:51 pmYXU-PHL
6h 26m1 stop
$922Air Canada
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Fri, Oct 31 - Fri, Nov 7
Air Canada Logo
4:35 pm - 9:21 pmPHL-YXU
4h 46m1 stop
Air Canada Logo
5:15 am - 2:47 pmYXU-PHL
9h 32m2 stops
$927Air Canada
Find Deal
Fri, Oct 31 - Fri, Nov 7
Multiple Airlines Logo
9:55 pm - 8:12 pmPHL-YXU
46h 17m3 stops
Multiple Airlines Logo
8:10 pm - 8:01 pmYXU-PHL
23h 51m2 stops
$2,298Multiple Airlines
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Everything you should know

Top airlines
United Airlines
Cheapest • from $840 (round-trip)
Air Canada
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$840
United Airlines
Fri 10/31Fri 11/7
PHL - YXU • 2 stops
Cheapest one-way
$385
United Airlines
Thu 10/30
PHL - YXU • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to London!
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 United Airlines ($840) and Air Canada ($922).

Find deals

Good to know

Cheapest flight$385
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 $385 for a one-way ticket and $840 for a round-trip.

  • 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
7.3Boarding
7.1Comfort
7.8Crew
6.8Entertainment
6.3Food
Airline reviews

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

8.0 ExcellentJason, Sep 2025ORD - YYZ
Read more Air Canada reviews

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

I found the boarding easy and my seat was very comfortable as I had a lot of leg room. I am not too happy that I no longer have lounge access even though I used to get it with my TD credit card.

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

Like the service. Very hard to communicate or contact when have problems

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

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

Information on your arrival and departure airports

Philadelphia (PHL)
London (YXU)

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