HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
London

$365+ Cheap flights from Philadelphia (PHL) to London, ON (YXU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/13. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — YXU
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Philadelphia to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Philadelphia to London

Cheapest flights from Philadelphia to London
Explore the most affordable flight options available from Philadelphia to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/137:45 pm
PHL
-
YXU
2 stops25h 36m
United Airlines
Fri 3/205:10 am
YXU
-
PHL
2 stops28h 37m
United Airlines
Deal found 1/27$911
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/1410:35 am
PHL
-
YXU
2 stops10h 46m
United Airlines
Sat 3/215:40 pm
YXU
-
PHL
2 stops20h 11m
United Airlines
Deal found 1/28$981
This Air Canada deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/134:35 pm
PHL
-
YXU
1 stop4h 46m
Air Canada
Fri 3/205:40 pm
YXU
-
PHL
1 stop5h 04m
Air Canada
Deal found 1/27$1,005
This Air Canada deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/23:30 pm
PHL
-
YXU
2 stops17h 16m
Air Canada
Wed 3/45:10 am
YXU
-
PHL
2 stops9h 37m
Air Canada
Deal found 1/28$1,025
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:27 am
PHL
-
YXU
2 stops14h 54m
United Airlines
Wed 3/49:40 am
YXU
-
PHL
1 stop6h 09m
United Airlines
Deal found 1/28$1,057

Find flight deals from Philadelphia to London

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to London (YXU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$911
(United Airlines)

One-way from

$365
(Kiwi.com)
Provider with most accurate pricing for Philadelphia-London flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-London flights.
Search Deals
From Philadelphia to London
Search Deals
One-way flight from Philadelphia to London
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Philadelphia to London that are best for you.

Fly from

Philadelphia

Fly to

London

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - YXU

PHLYXU

Philadelphia

Fri 3/13

7:45 pm-9:21 pm

2 stops25h 36m

London

Fri 3/20

5:10 am-9:47 am

2 stops28h 37m

$911

PhiladelphiaLondon

PHL - YXU

PHLYXU

Philadelphia

Sat 3/14

10:35 am-9:21 pm

2 stops10h 46m

London

Sat 3/21

5:40 pm-1:51 pm

2 stops20h 11m

$981

PhiladelphiaLondon

PHL - YXU

PHLYXU

Philadelphia

Fri 3/13

4:35 pm-9:21 pm

1 stop4h 46m

London

Fri 3/20

5:40 pm-10:44 pm

1 stop5h 04m

$1,005

PhiladelphiaLondon

PHL - YXU

PHLYXU

Philadelphia

Mon 3/2

3:30 pm-8:46 am

2 stops17h 16m

London

Wed 3/4

5:10 am-2:47 pm

2 stops9h 37m

$1,025

PhiladelphiaLondon

PHL - YXU

PHLYXU

Philadelphia

Mon 3/2

6:27 am-9:21 pm

2 stops14h 54m

London

Wed 3/4

9:40 am-3:49 pm

1 stop6h 09m

$1,057

PhiladelphiaLondon

PHL - YXU

PHLYXU

Philadelphia

Fri 3/13

7:04 pm-7:13 pm

3 stops48h 09m

$365

PhiladelphiaLondon

PHL - YXU

PHLYXU

Philadelphia

Fri 3/13

4:35 pm-9:21 pm

1 stop4h 46m

$464

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

  • Most accurate provider: When it comes to deals on Philadelphia-London, Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-London, Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-London, Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-London, Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-London, Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Philadelphia to London

Have a flexible travel schedule? Discover the best time to fly to London from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Philadelphia to London, Ontario?

Currently, May is the cheapest month in which you can book a flight from Philadelphia to London, Ontario (average of $84). Flying from Philadelphia to London, Ontario in December is currently the most expensive (average of $128). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated January 29, 2026.
Read reviews from past customers who have flown Air Canada from Philadelphia to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,667 reviews

Comfort

7.1

Entertainment

6.8

Food

6.3

Boarding

7.3

Crew

7.8

Overall

7.1

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.
Air Canada
7.1
Good
10,667 reviews
Air Canada
7.1
Good
10,667 reviews

Comfort

7.1

Entertainment

6.8

Food

6.3

Boarding

7.3

Crew

7.8

Overall

7.1

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Philadelphia to London, Ontario?

    United Airlines and Air Canada can get you from Philadelphia to London, Ontario in just under 4h 46m. Your travel time can differ by up to 20h 50m. There are 375 mi between Philadelphia and London, Ontario. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Philadelphia to London that include hotel bookings?

    Yes. In addition to deals on Philadelphia to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to London.

  • Can I find deals for business class flights from Philadelphia to London?

    Yes. Cheapflights offers flight deals from Philadelphia to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to London, Ontario?

    Currently, May is the cheapest month in which you can book a flight from Philadelphia to London, Ontario (average of $84). Flying from Philadelphia to London, Ontario in December is currently the most expensive (average of $128). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Grand Bend

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to London

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Pearson Intl flights
Newark to Pearson Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
Newark to Pierre Elliott Trudeau Intl flights
Newark to Toronto Island flights
LaGuardia to Pearson Intl flights
Reagan-National to Pearson Intl flights
Dulles Intl to Pearson Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Dulles Intl to Toronto Island flights
Philadelphia to Pearson Intl flights
Philadelphia to Pierre Elliott Trudeau Intl flights
John F Kennedy Intl to Toronto Island flights
LaGuardia to Toronto Island flights
Reagan-National to Toronto Island flights
Newark to Ottawa flights
Dulles Intl to Ottawa flights
Reagan-National to Ottawa flights
Pittsburgh to Pearson Intl flights
Philadelphia to Toronto Island flights
John F Kennedy Intl to Ottawa flights
LaGuardia to Ottawa flights
John F Kennedy Intl to Hamilton flights
Newark to Hamilton flights
Pittsburgh to Pierre Elliott Trudeau Intl flights
LaGuardia to Hamilton flights
Philadelphia to Ottawa flights
Pittsburgh to Toronto Island flights
Reagan-National to Thunder Bay flights
Allentown to Pearson Intl flights
Newark to London flights
State College to Pearson Intl flights
Allentown to Pierre Elliott Trudeau Intl flights
Harrisburg to Pearson Intl flights
Philadelphia to Hamilton flights
John F Kennedy Intl to Thunder Bay flights
State College to Pierre Elliott Trudeau Intl flights
Newark to Thunder Bay flights
LaGuardia to London flights
Reagan-National to London flights
Dulles Intl to London flights
Newark to Sudbury flights
LaGuardia to Sudbury flights
LaGuardia to Thunder Bay flights
Newark to Windsor flights
Dulles Intl to Thunder Bay flights

Top airline flying from Philadelphia to London

Discover the top airline that operate flights from Philadelphia to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$549Average$1,135FlexibilityNo cancel feeOn-time67%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.