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$220+ Cheap flights from Allentown (ABE) to London (LON)

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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — LON
Mar 7 — Mar 141
Sat 3/7
Sat 3/14
1 adult, Economy
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1. Tell us where you want to go

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Cheap flight deals from Allentown to London

Cheapest flights from Allentown to London
Explore the most affordable flight options available from Allentown to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 5, 2026.

This United Airlines deal was found by Cheapflights users on 2/2. 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.
Wed 3/410:36 am
ABE
-
LHR
1 stop16h 19m
United Airlines
Wed 3/1111:10 am
LHR
-
ABE
2 stops26h 46m
United Airlines
Deal found 2/2$635
This United Airlines deal was found by Cheapflights users on 2/5. 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 3/2010:31 am
ABE
-
LHR
2 stops18h 39m
United Airlines
Tue 3/241:25 pm
LHR
-
ABE
2 stops35h 25m
United Airlines
Deal found 2/5$646
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Wed 8/1911:50 am
ABE
-
LHR
2 stops14h 05m
United Airlines
Tue 8/257:25 am
LHR
-
ABE
2 stops18h 40m
United Airlines
Deal found 2/4$657
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Tue 4/146:15 am
ABE
-
LHR
1 stop19h 30m
United Airlines
Thu 4/237:30 am
LHR
-
ABE
2 stops31h 28m
United Airlines
Deal found 2/2$663
This KLM deal was found by Cheapflights users on 2/2. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/46:28 am
ABE
-
LHR
1 stop20h 22m
KLM
Wed 3/1112:30 pm
LHR
-
ABE
1 stop14h 26m
KLM
Deal found 2/2$664
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Thu 3/196:20 am
ABE
-
LHR
2 stops20h 20m
United Airlines
Thu 3/267:40 am
LHR
-
ABE
1 stop17h 10m
United Airlines
Deal found 2/2$668
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/145:59 pm
ABE
-
LHR
1 stop14h 16m
Delta
Thu 4/2311:15 am
LHR
-
ABE
1 stop16h 45m
Delta
Deal found 2/2$680
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Sun 8/166:30 am
ABE
-
LHR
1 stop19h 15m
United Airlines
Wed 8/268:00 am
LHR
-
ABE
1 stop14h 01m
United Airlines
Deal found 2/4$681
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Tue 8/1811:50 am
ABE
-
LHR
2 stops14h 05m
United Airlines
Wed 8/268:00 am
LHR
-
ABE
1 stop14h 01m
United Airlines
Deal found 2/4$686
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/281:00 pm
ABE
-
LGW
2 stops15h 25m
Delta
Thu 9/1010:25 am
LGW
-
ABE
2 stops17h 31m
Delta
Deal found 2/2$900
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/115:58 pm
ABE
-
LGW
2 stops17h 02m
Delta
Wed 4/1510:25 am
LGW
-
ABE
2 stops17h 35m
Delta
Deal found 2/4$1,102
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:00 am
ABE
-
LGW
2 stops40h 20m
Multiple Airlines
Sat 4/252:00 pm
LGW
-
ABE
1 stop29h 56m
Multiple Airlines
Deal found 2/4$1,105

Find flight deals from Allentown to London

Discover tips and strategies to find the most affordable flight options for your journey from Allentown (ABE) to London (LON). 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 February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$635
(United Airlines)

One-way from

$220
(United Airlines)
Provider with most accurate pricing for Allentown-Bethlehem-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Allentown-Bethlehem-London (LON) flights.
Search Deals
From Allentown-Bethlehem to London (LON)
Search Deals
One-way flight from Allentown-Bethlehem to London (LON)
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Allentown 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 February 5, 2026.
Use the filters below to find and compare flights from Allentown to London that are best for you.

Fly from

Allentown

Fly to

London

Route

Depart

Return

Price

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 3/4

10:36 am-9:10 am

2 stops17h 34m

London Heathrow

Wed 3/11

6:50 am-8:50 pm

2 stops18h 00m

$639

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 3/20

10:31 am-9:10 am

2 stops18h 39m

London Heathrow

Tue 3/24

1:25 pm-8:50 pm

2 stops35h 25m

$646

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 4/14

6:15 am-6:45 am

1 stop19h 30m

London Heathrow

Thu 4/23

7:30 am-9:58 am

2 stops31h 28m

$663

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 3/4

6:28 am-7:50 am

1 stop20h 22m

London Heathrow

Wed 3/11

12:30 pm-10:56 pm

1 stop14h 26m

$664

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 3/19

6:20 am-6:40 am

2 stops20h 20m

London Heathrow

Thu 3/26

7:40 am-8:50 pm

1 stop17h 10m

$668

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 4/14

5:59 pm-1:15 pm

1 stop14h 16m

London Heathrow

Thu 4/23

11:15 am-11:00 pm

1 stop16h 45m

$680

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 4/16

5:59 pm-11:20 am

1 stop12h 21m

London Heathrow

Fri 4/24

11:15 am-11:00 pm

1 stop16h 45m

$728

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 3/6

6:20 am-5:55 am

1 stop18h 35m

London Heathrow

Mon 3/9

6:50 am-9:56 am

2 stops31h 06m

$735

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sat 3/21

10:31 am-6:40 am

2 stops16h 09m

London Heathrow

Sat 3/28

9:10 am-8:50 pm

2 stops15h 40m

$748

AllentownLondon

ABE - LGW

ABELGW

Allentown-Bethlehem

Sat 4/11

5:58 pm-4:00 pm

2 stops17h 02m

London Gatwick

Wed 4/15

10:25 am-11:00 pm

2 stops17h 35m

$1,102

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 44 results
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Compare providers for flights from Allentown to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Allentown to London in February.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Allentown-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Allentown-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Allentown-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Allentown-London 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 Allentown-London 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 Allentown to London

Have a flexible travel schedule? Discover the best time to fly to London from Allentown 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 Allentown to London

What is the cheapest month to book a flight from Allentown to London?

Currently, October is the cheapest month in which you can book a flight from Allentown to London (average of $399). Flying from Allentown to London in June is currently the most expensive (average of $620). 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.

Related info for your journey

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

  • What airport do you fly from for flights from Allentown to London?

    Most people fly from Allentown-Bethlehem (ABE) if they book a flight from Allentown to London. On average, Allentown-Bethlehem has 0 outbound flights to London per day from 0 airlines. Allentown-Bethlehem is conveniently located just 3.9 mi from Allentown’s city center.

  • How long is the flight from Allentown to London?

    Airlines like United Airlines, KLM, and Delta fly from Allentown to London in about 17h 02m. The time it takes to get you to your destination can typically vary by up to 3h 20m. The distance from Allentown to London is about 3526 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Allentown to London?

    The most popular flight routes from Allentown to London are Allentown-Bethlehem - London Heathrow, Allentown-Bethlehem - London Gatwick and Allentown-Bethlehem - London City.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Allentown 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 Allentown to London?

    Currently, October is the cheapest month in which you can book a flight from Allentown to London (average of $399). Flying from Allentown to London in June is currently the most expensive (average of $620). 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
Ilford
Hounslow
Croydon
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Watford
Hayes
Borehamwood
Aylesbury
Chipping Norton
Horley
Kingston upon Thames
Eastbourne
Sutton

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