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Cheap flights from London Heathrow Airport to Allentown from £528

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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ABE
9 Nov — 16 Nov1
1 adult
1 adult, Economy

Find flight deals from Heathrow to Allentown

Enter your travel dates to find the best prices.

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 10 October 2025.

Wed 17/1208:40LHR - ABE
2 stops18h 31mDelta
Mon 29/1206:15ABE - LHR
1 stop19h 10mDelta
Deal found 9/10£653
Wed 17/1208:40LHR - ABE
2 stops18h 31mDelta
Sun 28/1206:15ABE - LHR
1 stop19h 10mDelta
Deal found 9/10£698
Mon 24/1106:50LHR - ABE
2 stops14h 57mUnited Airlines
Mon 1/1213:00ABE - LHR
1 stop11h 55mUnited Airlines
Deal found 10/10£774
Wed 17/1206:30LHR - ABE
2 stops20h 41mDelta
Thu 1/106:15ABE - LHR
1 stop19h 10mDelta
Deal found 9/10£800
Mon 22/1206:30LHR - ABE
2 stops15h 54mDelta
Mon 29/1206:15ABE - LHR
1 stop19h 10mDelta
Deal found 9/10£834
Wed 17/1208:40LHR - ABE
2 stops18h 31mDelta
Sat 3/118:04ABE - LHR
1 stop31h 21mDelta
Deal found 9/10£857
Thu 18/1206:30LHR - ABE
2 stops15h 44mDelta
Mon 29/1206:15ABE - LHR
1 stop19h 10mDelta
Deal found 9/10£865
Mon 22/1206:30LHR - ABE
2 stops15h 54mDelta
Sun 28/1206:15ABE - LHR
1 stop19h 10mDelta
Deal found 9/10£880
Thu 18/1206:30LHR - ABE
2 stops15h 44mDelta
Sun 28/1206:15ABE - LHR
1 stop19h 10mDelta
Deal found 9/10£910
Wed 17/1208:40LHR - ABE
2 stops18h 31mDelta
Fri 2/106:15ABE - LHR
2 stops20h 25mDelta
Deal found 9/10£929
Sun 23/1106:50LHR - ABE
2 stops14h 57mUnited Airlines
Sun 30/1113:00ABE - LHR
1 stop11h 55mUnited Airlines
Deal found 9/10£933

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 10 October 2025.

Round-trip from

£653

Popular in

December

Cheapest in

April

Average price

£631
Delta
  • Delta
  • 17/12-29/12
  • 3 total stops
  • 37h 41m total
  • London to Allentown
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£53 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 10 October 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 17/12

08:40-22:11

2 stops18h 31m

Allentown-Bethlehem

Sun 28/12

06:15-06:25

1 stop19h 10m

£698

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 28/10

12:30-12:06

1 stop27h 36m

Allentown-Bethlehem

Sat 1/11

18:00-06:25

1 stop32h 25m

£746

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 27/10

16:50-12:06

2 stops23h 16m

Allentown-Bethlehem

Sat 1/11

18:00-06:25

1 stop32h 25m

£764

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 24/11

06:50-16:47

2 stops14h 57m

Allentown-Bethlehem

Mon 1/12

13:00-05:55

1 stop11h 55m

£774

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 28/10

16:50-17:20

2 stops28h 30m

Allentown-Bethlehem

Sun 2/11

12:46-10:50

2 stops17h 04m

£785

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 25/10

17:25-12:06

1 stop23h 41m

Allentown-Bethlehem

Sat 1/11

18:00-06:25

1 stop32h 25m

£794

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 26/10

16:50-12:06

2 stops23h 16m

Allentown-Bethlehem

Sat 1/11

18:00-06:25

1 stop32h 25m

£794

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 27/10

09:55-22:40

1 stop16h 45m

Allentown-Bethlehem

Sun 2/11

17:10-12:00

1 stop13h 50m

£797

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 17/12

06:30-22:11

2 stops20h 41m

Allentown-Bethlehem

Tue 30/12

06:15-06:25

1 stop19h 10m

£800

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 17/12

06:30-22:11

2 stops20h 41m

Allentown-Bethlehem

Wed 31/12

14:00-06:25

1 stop11h 25m

£800

Flights are sorted by cheapest return flights first.

Deals found on 8/10

Showing 1-10 of 15 results
1
2

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

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

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Allentown (average of £312). Flying from London Heathrow Airport to Allentown in June is currently the most expensive (average of £359). 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.

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 10 October 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Allentown, such as Finnair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,332 reviews
Check prices

Boarding

7.6

Crew

8.1

Entertainment

6.9

Comfort

7.4

Food

6.7

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,332 reviews
Finnair
7.6
Good
1,332 reviews
Check prices

Boarding

7.6

Crew

8.1

Entertainment

6.9

Comfort

7.4

Food

6.7

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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.

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

    Airlines like Delta and United Airlines fly from London Heathrow Airport to Allentown in about 14h 57m. The time it takes to get you to your destination can typically vary by up to 3h 34m. The distance between London Heathrow Airport and Allentown is about 3507 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from London Heathrow Airport to Allentown round-trip?

    According to our current data, Finnair (£534), 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.

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

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Allentown (average of £312). Flying from London Heathrow Airport to Allentown in June is currently the most expensive (average of £359). 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

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Alternative routes for Heathrow to Allentown

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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 10 October 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£534Average£605FlexibilityNo 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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