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Cheap flights from London Heathrow Airport to Allentown from £563

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ABE
25 Mar — 1 Apr1
1 adult

Cheap flight deals from Heathrow to Allentown

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Allentown (ABE). 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 20 March 2025.

Round-trip from

£563

Popular in

August

Cheapest in

April

Average price

£772
Delta
  • Delta
  • 9/4-15/4
  • 4 total stops
  • 34h 41m total
  • London to Allentown
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£116 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (£43 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
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Find flight deals from Heathrow to Allentown

Cheapest flights from Heathrow to Allentown
Explore the most affordable flight options available from Heathrow to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 March 2025.

Wed 9/409:55LHR - ABE
2 stops17h 23mDelta
Tue 15/413:07ABE - LHR
2 stops17h 18mDelta
Deal found 19/3£563
Sat 3/510:55LHR - ABE
2 stops16h 23mVirgin Atlantic
Sat 10/517:50ABE - LHR
1 stop12h 20mVirgin Atlantic
Deal found 19/3£588
Tue 14/1013:20LHR - ABE
2 stops15h 59mAmerican Airlines
Mon 20/1011:57ABE - LHR
2 stops14h 48mAmerican Airlines
Deal found 19/3£634
Sat 3/506:50LHR - ABE
2 stops15h 07mUnited Airlines
Sat 10/517:32ABE - LHR
1 stop13h 13mUnited Airlines
Deal found 19/3£763
Thu 1/508:40LHR - ABE
2 stops18h 05mMultiple Airlines
Tue 6/517:32ABE - LHR
1 stop13h 13mMultiple Airlines
Deal found 20/3£2,531

Cheapflights Fare Finder

Customise your flight search to find flights from Heathrow to Allentown 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 858,174 searches. Data last updated 20 March 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Allentown that are best for you.

Fly from

Heathrow

Fly to

Allentown

Route

Depart

Return

Price

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 9/4

09:55-22:18

2 stops17h 23m

Allentown-Bethlehem

Tue 15/4

13:07-11:25

2 stops17h 18m

£563

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 3/5

10:55-22:18

2 stops16h 23m

Allentown-Bethlehem

Sat 10/5

17:50-11:10

1 stop12h 20m

£588

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 3/5

06:50-16:57

2 stops15h 07m

Allentown-Bethlehem

Sat 10/5

17:32-11:45

1 stop13h 13m

£763

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 1/5

08:40-21:45

2 stops18h 05m

Allentown-Bethlehem

Tue 6/5

17:32-11:45

1 stop13h 13m

£2,531

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 5/8

15:15-23:27

1 stop13h 12m

£1,138

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 29/3

15:00-16:57

2 stops29h 57m

£8,443

Flights are sorted by cheapest return flights first.

Deals found on 19/3

Best time to book a flight from Heathrow to Allentown

Have a flexible travel schedule? Discover the best time to fly to Allentown from Heathrow with our price prediction graph.
Estimated return 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 London Heathrow Airport to Allentown

Rainfall in Allentown by month

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

In terms of precipitation, rainfall in Allentown ranges from 69.0 - 127.0 inches per month. July is typically the wettest month, when rainfall can reach 127.0 mm. February is typically the driest time to visit Allentown when rainfall is around 69.0 mm.

Temperature in Allentown by month

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

If weather is an important factor for your trip to Allentown, 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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -2.0 C).

Reviews of airlines servicing Allentown

Get insights into the airlines that provide service to Allentown. 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 Allentown. Reviews last updated 20 March 2025.
Delta
8.0
Very Good
7,896 reviews
Check prices

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,896 reviews
Delta
8.0
Very Good
7,896 reviews
Check prices

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,609 reviews
Delta
8.0
Very Good
7,896 reviews
Check prices

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Virgin Atlantic
7.4
Good
634 reviews
Delta
8.0
Very Good
7,896 reviews
Check prices

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Allentown. 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 into for flights to Allentown from London Heathrow?

    Most people fly into Allentown-Bethlehem (ABE) if they book a flight to Allentown from London Heathrow. On average, Allentown-Bethlehem has 0 inbound flights from London Heathrow per day from 1 airline. Allentown-Bethlehem is conveniently located just 3.9 mi from Allentown’s city center.

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

    According to our current data, Delta (£563), Virgin Atlantic (£588), and United Airlines (£763) offers the cheapest pricing from London Heathrow Airport to Allentown.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Allentown by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Heathrow to Allentown

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

Discover the top airline that operate flights from Heathrow to Allentown. 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 858,174 searches. Data last updated 20 March 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£476Average£585FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Allentown?

Deals for Heathrow to Allentown flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Allentown?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Allentown for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to Allentown with no change fees?

Need flexible booking options for your flight to Allentown from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Allentown become cheaper?

Yes! Start tracking prices for Heathrow to Allentown flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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