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$504+ 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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — LHR
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$740
(American Airlines)

One-way from

$504
(Delta)

Popular in

June

Cheapest in

November

Average price

$1,152
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. 16% potential increase in price ($158 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/12. 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.
Tue 9/22:56 pmABE - LHR
1 stop11h 44mAmerican Airlines
Fri 9/1211:00 amLHR - ABE
1 stop12h 30mAmerican Airlines
Deal found 6/12$740
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/45:28 pmABE - LHR
1 stop31h 52mUnited Airlines
Tue 10/148:30 amLHR - ABE
1 stop13h 23mUnited Airlines
Deal found 6/10$750
This Delta deal was found by Cheapflights users on 6/11. 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 9/102:30 pmABE - LHR
1 stop11h 15mDelta
Mon 9/1512:25 pmLHR - ABE
2 stops28h 43mDelta
Deal found 6/11$805
This KLM deal was found by Cheapflights users on 6/12. 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 9/22:30 pmABE - LHR
1 stop18h 00mKLM
Fri 9/126:30 amLHR - ABE
2 stops15h 44mKLM
Deal found 6/12$831
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Sat 7/2612:46 pmABE - LHR
3 stops42h 09mMultiple Airlines
Sat 8/28:10 pmLHR - ABE
3 stops30h 50mMultiple Airlines
Deal found 6/11$1,199
This WestJet deal was found by Cheapflights users on 6/11. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:00 pmABE - LHR
2 stops42h 50mWestJet
Mon 12/82:50 pmLHR - ABE
2 stops31h 24mWestJet
Deal found 6/11$8,316

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 June 12, 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 9/2

2:56 pm-7:40 am

1 stop11h 44m

London Heathrow

Fri 9/12

11:00 am-6:30 pm

1 stop12h 30m

$740

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sat 10/4

5:28 pm-6:20 am

1 stop31h 52m

London Heathrow

Tue 10/14

8:30 am-4:53 pm

1 stop13h 23m

$750

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 9/10

2:30 pm-6:45 am

1 stop11h 15m

London Heathrow

Mon 9/15

12:25 pm-12:08 pm

2 stops28h 43m

$805

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 9/2

2:30 pm-1:30 pm

1 stop18h 00m

London Heathrow

Fri 9/12

6:30 am-5:14 pm

2 stops15h 44m

$831

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sat 7/26

12:46 pm-11:55 am

3 stops42h 09m

London Heathrow

Sat 8/2

8:10 pm-10:00 pm

3 stops30h 50m

$1,199

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 12/4

1:00 pm-12:50 pm

2 stops42h 50m

London Heathrow

Mon 12/8

2:50 pm-5:14 pm

2 stops31h 24m

$8,316

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 7/8

12:55 pm-6:45 am

1 stop12h 50m

$504

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 7/24

8:03 pm-12:30 pm

1 stop11h 27m

$513

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 7/24

6:30 am-6:45 am

2 stops19h 15m

$518

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

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 $1,108). 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 June 12, 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 June 12, 2025.
To help decide which airline to fly from Allentown to London, see what other customers have to say about Delta, KLM and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
2,868 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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?

    American Airlines, at $740, was found to be the cheapest airline from Allentown to London Heathrow Airport.Alternate airlines to your destination round-trip include United Airlines and Delta. American Airlines is priced at 7% 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 $504. American Airlines flights start at $513 while deals on United Airlines start at $518 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 $1,108). 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
Canterbury
Harrow
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Folkestone
Borehamwood
Broadway
Sutton
Aylesbury
Chelmsford
Brentwood

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$588Average$780FlexibilityNo cancel feeOn-time71%
DeltaCheapest$597Average$742FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$674Average$770FlexibilityNo cancel feeOn-time69%

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