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$286+ Cheap flights from Allentown (ABE) to Heathrow (LHR)

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — LHR
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
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 Heathrow

Cheapest flights from Allentown to Heathrow
Explore the most affordable flight options available from Allentown to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 11, 2026.

This United Airlines deal was found by Cheapflights users on 3/7. 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 8/236:15 am
ABE
-
LHR
1 stop21h 45m
United Airlines
Wed 9/26:50 am
LHR
-
ABE
2 stops19h 22m
United Airlines
Deal found 3/7$717
This United Airlines deal was found by Cheapflights users on 3/7. 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 8/225:36 pm
ABE
-
LHR
2 stops22h 59m
United Airlines
Wed 9/27:25 am
LHR
-
ABE
2 stops18h 47m
United Airlines
Deal found 3/7$722
This United Airlines deal was found by Cheapflights users on 3/7. 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 8/236:15 am
ABE
-
LHR
2 stops19h 15m
United Airlines
Tue 9/110:50 am
LHR
-
ABE
2 stops28h 16m
United Airlines
Deal found 3/7$727
This United Airlines deal was found by Cheapflights users on 3/7. 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 8/225:36 pm
ABE
-
LHR
2 stops22h 59m
United Airlines
Tue 9/110:50 am
LHR
-
ABE
2 stops28h 16m
United Airlines
Deal found 3/7$728
This United Airlines deal was found by Cheapflights users on 3/7. 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 8/202:30 pm
ABE
-
LHR
1 stop13h 00m
United Airlines
Wed 9/26:50 am
LHR
-
ABE
2 stops15h 06m
United Airlines
Deal found 3/7$767
This United Airlines deal was found by Cheapflights users on 3/6. 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 7/306:15 am
ABE
-
LHR
1 stop21h 15m
United Airlines
Wed 8/196:55 am
LHR
-
ABE
2 stops32h 11m
United Airlines
Deal found 3/6$773
This United Airlines deal was found by Cheapflights users on 3/7. 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 8/225:36 pm
ABE
-
LHR
2 stops31h 54m
United Airlines
Mon 8/316:50 am
LHR
-
ABE
2 stops15h 06m
United Airlines
Deal found 3/7$776
This United Airlines deal was found by Cheapflights users on 3/6. 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 4/2110:35 am
ABE
-
LHR
1 stop15h 10m
United Airlines
Tue 4/286:50 am
LHR
-
ABE
2 stops19h 27m
United Airlines
Deal found 3/6$777

Find flight deals from Allentown to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Allentown (ABE) to Heathrow (LHR). 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 March 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$717
(United Airlines)

One-way from

$286
(United Airlines)
Provider with most accurate pricing for Allentown-Bethlehem-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Allentown-Bethlehem-London Heathrow flights.
Search Deals
From Allentown-Bethlehem to London Heathrow
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One-way flight from Allentown-Bethlehem to London Heathrow
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Allentown to Heathrow 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 March 11, 2026.
Use the filters below to find and compare flights from Allentown to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 7/30

10:38 am-7:15 am

2 stops15h 37m

London Heathrow

Wed 8/19

7:25 am-10:06 am

2 stops31h 41m

$778

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 4/21

10:35 am-5:55 am

2 stops14h 20m

London Heathrow

Tue 4/28

6:55 am-9:17 pm

2 stops19h 22m

$782

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 5/13

10:35 am-7:15 am

2 stops15h 40m

London Heathrow

Tue 5/19

6:50 am-8:58 pm

2 stops19h 08m

$782

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 4/22

6:15 am-5:55 am

2 stops18h 40m

London Heathrow

Wed 4/29

6:50 am-5:03 pm

2 stops15h 13m

$782

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Mon 4/20

10:35 am-6:55 am

2 stops15h 20m

London Heathrow

Mon 4/27

5:50 pm-9:17 pm

2 stops32h 27m

$795
Quickest round-trip

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 4/21

12:53 pm-6:25 am

1 stop12h 32m

London Heathrow

Tue 4/28

9:20 am-11:00 pm

1 stop18h 40m

$806

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 9/2

6:15 am-6:30 am

2 stops19h 15m

London Heathrow

Mon 9/7

6:55 am-9:12 pm

2 stops19h 17m

$821

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 4/24

10:35 am-9:00 am

1 stop17h 25m

London Heathrow

Tue 4/28

6:50 am-5:03 pm

2 stops15h 13m

$827
Cheapest one-way

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sat 9/5

5:36 pm-6:55 am

2 stops32h 19m

$286

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 8/2

1:00 pm-6:25 am

1 stop12h 25m

$516

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/10

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from Allentown to Heathrow

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 Heathrow in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Allentown-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Allentown-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Allentown-London Heathrow Airport 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 Heathrow Airport 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 Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

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

Currently, November is the cheapest month in which you can book a flight from Allentown to London Heathrow Airport (average of $456). Flying from Allentown to London Heathrow Airport in June is currently the most expensive (average of $616). 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 Heathrow. 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 Heathrow?

    Allentown-Bethlehem (ABE) is the airport you will fly out of if you book a flight from Allentown to London Heathrow. You should not have trouble finding flights to London Heathrow from Allentown-Bethlehem; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Allentown airport to London Heathrow. It is only a 3.9 mi journey to Allentown-Bethlehem (ABE) from Allentown’s city center.

  • How long is the flight from Allentown to London Heathrow Airport?

    Airlines like United Airlines fly from Allentown to London Heathrow Airport in about 15h 37m. The time it takes to get you to your destination can typically vary by up to . The distance between Allentown and London Heathrow Airport is about 3507 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Allentown to Heathrow 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 Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Allentown to London Heathrow Airport (average of $456). Flying from Allentown to London Heathrow Airport in June is currently the most expensive (average of $616). 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 Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Hounslow
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Orpington
Watford
Northampton
Borehamwood
Broadway
Aylesbury
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne

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