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$406+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — LHR
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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Find 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 October 27, 2025.

This Delta deal was found by Cheapflights users on 10/24. 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 12/96:25 amABE - LHR
1 stop20h 25mDelta
Tue 12/168:40 amLHR - ABE
2 stops18h 31mDelta
Deal found 10/24$593
This KLM deal was found by Cheapflights users on 10/24. 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.
Tue 12/912:54 pmABE - LHR
1 stop13h 56mKLM
Tue 12/168:55 amLHR - ABE
1 stop13h 19mKLM
Deal found 10/24$600
This Delta deal was found by Cheapflights users on 10/26. 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.
Sun 11/912:56 pmABE - LHR
1 stop15h 04mDelta
Tue 12/235:35 pmLHR - ABE
2 stops34h 11mDelta
Deal found 10/26$605
This Delta deal was found by Cheapflights users on 10/26. 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 11/86:00 pmABE - LHR
1 stop34h 00mDelta
Tue 12/235:35 pmLHR - ABE
2 stops34h 11mDelta
Deal found 10/26$610
This United Airlines deal was found by Cheapflights users on 10/26. 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 11/96:32 amABE - LHR
1 stop18h 23mUnited Airlines
Tue 11/186:35 amLHR - ABE
2 stops34h 13mUnited Airlines
Deal found 10/26$619
This United Airlines deal was found by Cheapflights users on 10/26. 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 12/106:30 amABE - LHR
1 stop20h 25mUnited Airlines
Wed 12/1710:30 amLHR - ABE
2 stops35h 00mUnited Airlines
Deal found 10/26$631
This United Airlines deal was found by Cheapflights users on 10/26. 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 11/95:22 pmABE - LHR
1 stop12h 53mUnited Airlines
Tue 12/237:25 amLHR - ABE
1 stop19h 22mUnited Airlines
Deal found 10/26$649
This Delta deal was found by Cheapflights users on 10/26. 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.
Sun 11/96:10 amABE - LHR
2 stops21h 35mDelta
Mon 12/221:00 pmLHR - ABE
2 stops28h 09mDelta
Deal found 10/26$654
This Delta deal was found by Cheapflights users on 10/26. 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 11/76:00 amABE - LHR
1 stop20h 50mDelta
Tue 12/235:35 pmLHR - ABE
2 stops34h 11mDelta
Deal found 10/26$655

Cheap 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 October 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$593
(Delta)

One-way from

$406
(Delta)
Provider with most accurate pricing for Allentown-Bethlehem-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Allentown-Bethlehem-London Heathrow flights.
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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 October 27, 2025.
Use the filters below to find and compare flights from Allentown to London Heathrow Airport that are best for you.

Fly from

Allentown

Fly to

Heathrow

Route

Depart

Return

Price

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 12/9

6:25 am-7:50 am

1 stop20h 25m

London Heathrow

Tue 12/16

8:40 am-10:11 pm

2 stops18h 31m

$593

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 12/9

12:54 pm-7:50 am

1 stop13h 56m

London Heathrow

Tue 12/16

8:55 am-5:14 pm

1 stop13h 19m

$600

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Mon 11/10

6:10 am-7:50 am

1 stop20h 40m

London Heathrow

Tue 12/23

5:35 pm-10:46 pm

2 stops34h 11m

$605

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 11/9

6:10 am-8:45 am

2 stops21h 35m

London Heathrow

Tue 12/23

5:35 pm-10:46 pm

2 stops34h 11m

$609

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 12/10

6:30 am-7:55 am

1 stop20h 25m

London Heathrow

Wed 12/17

10:30 am-4:30 pm

2 stops35h 00m

$631

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Mon 11/10

6:10 am-11:10 am

2 stops24h 00m

London Heathrow

Mon 12/22

1:00 pm-12:09 pm

2 stops28h 09m

$654

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 12/11

12:54 pm-9:00 am

1 stop15h 06m

London Heathrow

Thu 12/18

1:00 pm-12:14 pm

2 stops28h 14m

$654

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 11/11

12:56 pm-7:50 am

1 stop13h 54m

London Heathrow

Mon 12/22

1:00 pm-12:09 pm

2 stops28h 09m

$654

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Mon 11/10

1:00 pm-5:55 am

1 stop11h 55m

London Heathrow

Mon 11/17

9:00 am-11:48 am

2 stops31h 48m

$676

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 11/9

5:22 pm-11:15 am

1 stop12h 53m

London Heathrow

Sun 11/16

7:40 am-4:47 pm

1 stop14h 07m

$699

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 17 results
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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 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 Heathrow Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Allentown-London Heathrow Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, January is the cheapest month in which you can book a flight from Allentown to London Heathrow Airport (average of $397). Flying from Allentown to London Heathrow Airport in June is currently the most expensive (average of $621). 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.

What is the cheapest time of day to fly from ABE to LHR?

Find hourly flight availability from Allentown to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 27, 2025.

When flying from Allentown to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 25% versus a flight in the morning.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated October 27, 2025.
Read reviews from past customers who have flown Delta and United Airlines from Allentown to London Heathrow Airport. 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.
Delta
7.9
Good
7,996 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,996 reviews
Delta
7.9
Good
7,996 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,997 reviews
Delta
7.9
Good
7,996 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 2 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 Delta and KLM fly from Allentown to London Heathrow Airport in about 13h 56m. The time it takes to get you to your destination can typically vary by up to 6h 29m. The distance between Allentown and London Heathrow Airport is about 3507 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Allentown to London Heathrow Airport round-trip?

    Delta, at $581, was found to be the cheapest airline from Allentown to London Heathrow Airport. An alternate airline flying to your destination would be United Airlines.

  • 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, January is the cheapest month in which you can book a flight from Allentown to London Heathrow Airport (average of $397). Flying from Allentown to London Heathrow Airport in June is currently the most expensive (average of $621). 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
Hounslow
Ilford
Hayes
Southend-on-Sea
Harrow
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Chipping Norton
Wembley
Folkestone

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Alternative routes for Allentown to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Allentown to Heathrow

Discover the top 2 airlines that operate flights from Allentown to Heathrow. 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 October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$581Average$724FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$690Average$817FlexibilityNo cancel feeOn-time69%

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