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$315+ 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 7/20. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — LHR
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$601
(Delta)

One-way from

$315
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$777
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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Highest demand for flights based on searches. 22% potential increase in price ($232 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($53 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 29, 2025.

This Delta deal was found by Cheapflights users on 4/29. 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.
Wed 10/81:00 pmABE - LHR
1 stop19h 30mDelta
Wed 10/156:15 amLHR - ABE
2 stops22h 08mDelta
Deal found 4/29$601
This KLM deal was found by Cheapflights users on 4/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/101:00 pmABE - LHR
1 stop19h 30mKLM
Sun 9/289:20 amLHR - ABE
1 stop19h 03mKLM
Deal found 4/28$659
This United Airlines deal was found by Cheapflights users on 4/28. 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 5/125:32 pmABE - LHR
1 stop13h 13mUnited Airlines
Sun 5/258:30 amLHR - ABE
1 stop13h 29mUnited Airlines
Deal found 4/28$849
This American Airlines deal was found by Cheapflights users on 4/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/215:27 pmABE - LHR
1 stop14h 03mAmerican Airlines
Sat 5/313:00 pmLHR - ABE
1 stop14h 40mAmerican Airlines
Deal found 4/28$1,253
This Mytrip deal was found by Cheapflights users on 4/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/58:00 amABE - LHR
3 stops46h 55mMultiple Airlines
Tue 10/2110:05 pmLHR - ABE
2 stops27h 17mMultiple Airlines
Deal found 4/28$1,297

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 April 29, 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

Wed 10/8

1:00 pm-1:30 pm

1 stop19h 30m

London Heathrow

Wed 10/15

6:15 am-11:23 pm

2 stops22h 08m

$601

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 9/10

1:00 pm-1:30 pm

1 stop19h 30m

London Heathrow

Sun 9/28

9:20 am-11:23 pm

1 stop19h 03m

$659

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Mon 5/12

5:32 pm-11:45 am

1 stop13h 13m

London Heathrow

Sun 5/25

8:30 am-4:59 pm

1 stop13h 29m

$849

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 5/21

5:27 pm-12:30 pm

1 stop14h 03m

London Heathrow

Sat 5/31

3:00 pm-12:40 am

1 stop14h 40m

$1,253

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 10/5

8:00 am-11:55 am

3 stops46h 55m

London Heathrow

Tue 10/21

10:05 pm-8:22 pm

2 stops27h 17m

$1,297

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 7/20

4:11 pm-8:20 pm

2 stops23h 09m

$315

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Mon 7/21

6:04 pm-11:10 am

1 stop12h 06m

$399

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sat 7/19

6:04 pm-7:15 am

1 stop32h 11m

$412

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 7/15

5:35 pm-11:45 am

1 stop13h 10m

$423

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/27

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 Heathrow Airport flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Allentown-London Heathrow Airport flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 $661). Flying from Allentown to London Heathrow Airport in June is currently the most expensive (average of $1,110). 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 April 29, 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 26% versus a flight in the morning.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 April 29, 2025.
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 3 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.

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

    Delta, at $601, was found to be the cheapest airline from Allentown to London Heathrow Airport.Alternate airlines to your destination round-trip include KLM and United Airlines. Delta is priced at 27% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Allentown to London Heathrow Airport one-way?

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $399. United Airlines flights start at $423 while deals on KLM start at $539 one-way.

  • 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 $661). Flying from Allentown to London Heathrow Airport in June is currently the most expensive (average of $1,110). 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 Allentown?

Book flights to Allentown if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Luton
Horley
Canterbury
Harrow
Wembley
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Borehamwood
Folkestone
Ilford
Broadway
Aylesbury

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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 3 airlines flying from Allentown to Heathrow

Discover the top 3 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$575Average$833FlexibilityNo cancel feeOn-time69%
DeltaCheapest$597Average$777FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$639Average$782FlexibilityNo cancel feeOn-time71%

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