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Cheap flights from London Heathrow Airport to Allentown from £428

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ABE
10 May — 17 May1
1 adult
1 adult, Economy, 0 bags

Cheap 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 April 2026.

Wed 13/515:15
LHR
-
ABE
1 stop31h 13m
Virgin Atlantic
Thu 21/512:59
ABE
-
LHR
1 stop17h 21m
Virgin Atlantic
Deal found 7/4£670
Tue 19/520:55
LHR
-
ABE
2 stops30h 23m
Virgin Atlantic
Thu 9/713:08
ABE
-
LHR
2 stops17h 12m
Virgin Atlantic
Deal found 6/4£702
Mon 14/915:00
LHR
-
ABE
1 stop12h 14m
American Airlines
Thu 15/1017:18
ABE
-
LHR
1 stop12h 57m
American Airlines
Deal found 7/4£704
Tue 15/916:35
LHR
-
ABE
2 stops30h 35m
American Airlines
Thu 15/1017:18
ABE
-
LHR
1 stop12h 57m
American Airlines
Deal found 7/4£707
Tue 19/509:15
LHR
-
ABE
1 stop19h 13m
American Airlines
Thu 9/717:18
ABE
-
LHR
1 stop12h 12m
American Airlines
Deal found 6/4£732
Sun 13/909:15
LHR
-
ABE
1 stop13h 55m
American Airlines
Mon 12/1013:54
ABE
-
LHR
1 stop12h 01m
American Airlines
Deal found 7/4£762
Thu 17/915:00
LHR
-
ABE
1 stop32h 10m
American Airlines
Mon 12/1013:54
ABE
-
LHR
1 stop12h 01m
American Airlines
Deal found 7/4£771
Sat 23/506:30
LHR
-
ABE
2 stops20h 48m
Delta
Sat 30/506:23
ABE
-
LHR
2 stops19h 47m
Delta
Deal found 8/4£774
Wed 16/911:10
LHR
-
ABE
1 stop16h 05m
Multiple Airlines
Wed 14/1017:18
ABE
-
LHR
1 stop12h 57m
Multiple Airlines
Deal found 7/4£781
Thu 17/914:45
LHR
-
ABE
1 stop12h 30m
American Airlines
Tue 13/1006:00
ABE
-
LHR
1 stop19h 50m
American Airlines
Deal found 7/4£790

Find 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 April 2026.

Round-trip from

£670

One-way from

£428
Virgin Atlantic
  • Virgin Atlantic
  • 13/5-21/5
  • 2 total stops
  • 48h 34m total
  • London to Allentown
Search Deals
16/9
  • 16/9
  • 1 total stop
  • 16h 05m total
  • London to Allentown
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 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Allentown that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 15/9

11:10-22:15

1 stop16h 05m

Allentown-Bethlehem

Thu 15/10

17:18-11:15

1 stop12h 57m

£704

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 23/5

09:20-22:18

1 stop17h 58m

Allentown-Bethlehem

Sat 30/5

06:23-07:10

2 stops19h 47m

£788

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 25/5

12:25-12:19

2 stops28h 54m

Allentown-Bethlehem

Mon 1/6

12:59-10:20

2 stops16h 21m

£830

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 21/5

11:05-21:17

1 stop15h 12m

Allentown-Bethlehem

Thu 28/5

06:15-10:00

2 stops22h 45m

£965
Fastest return journey

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 24/5

08:00-17:01

1 stop14h 01m

Allentown-Bethlehem

Sun 31/5

17:36-11:55

1 stop13h 19m

£1,063

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 27/9

17:50-16:56

2 stops28h 06m

Allentown-Bethlehem

Thu 1/10

14:30-11:55

1 stop16h 25m

£1,580
Cheapest one-way

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 16/9

11:10-22:15

1 stop16h 05m

£428

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 15/9

08:40-22:56

2 stops19h 16m

£445

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 17/9

06:30-22:56

2 stops21h 26m

£487
Fastest single journey

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 19/9

09:20-17:17

1 stop12h 57m

£499

Flights are sorted by cheapest return flights first.

Deals found on 7/4

Showing 1-10 of 16 resultsSorted by cheapest first
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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 £316). Flying from London Heathrow Airport to Allentown in June is currently the most expensive (average of £354). 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.

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 0 airlines. 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 American Airlines, Delta, and United Airlines fly from London Heathrow Airport to Allentown in about 15h 12m. The time it takes to get you to your destination can typically vary by up to 2h 46m. 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.

  • 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 £316). Flying from London Heathrow Airport to Allentown in June is currently the most expensive (average of £354). 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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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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