Find flights
When to book
FAQs

Cheap flights from London Heathrow Airport to Allentown from £414

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ABE
10 Jul — 17 Jul1
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 June 2026.

Mon 13/714:45
LHR
-
ABE
1 stop13h 23m
American Airlines
Thu 30/717:12
ABE
-
LHR
1 stop13h 03m
American Airlines
Deal found 5/6£677
Wed 23/907:30
LHR
-
ABE
2 stops31h 05m
United Airlines
Sun 27/906:20
ABE
-
LHR
1 stop19h 25m
United Airlines
Deal found 8/6£698
Fri 3/715:00
LHR
-
ABE
1 stop14h 23m
American Airlines
Tue 14/719:09
ABE
-
LHR
1 stop12h 01m
American Airlines
Deal found 5/6£707
Mon 13/708:45
LHR
-
ABE
2 stops19h 23m
British Airways
Thu 30/719:09
ABE
-
LHR
1 stop12h 01m
British Airways
Deal found 5/6£709
Mon 13/706:50
LHR
-
ABE
2 stops32h 08m
United Airlines
Thu 30/706:15
ABE
-
LHR
2 stops18h 40m
United Airlines
Deal found 5/6£732
Fri 3/709:40
LHR
-
ABE
2 stops18h 28m
Virgin Atlantic
Tue 14/713:08
ABE
-
LHR
2 stops16h 12m
Virgin Atlantic
Deal found 5/6£740
Mon 6/714:10
LHR
-
ABE
1 stop24h 48m
United Airlines
Mon 13/710:35
ABE
-
LHR
1 stop15h 10m
United Airlines
Deal found 8/6£749

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 June 2026.

Round-trip from

£677

One-way from

£414
American Airlines
  • American Airlines
  • 13/7-30/7
  • 2 total stops
  • 26h 26m total
  • London to Allentown
Search Deals
4/9
  • 4/9
  • 2 total stops
  • 27h 34m 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 June 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

Mon 13/7

14:45-23:08

1 stop13h 23m

Allentown-Bethlehem

Thu 30/7

17:12-11:15

1 stop13h 03m

£677

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 23/9

07:30-09:35

2 stops31h 05m

Allentown-Bethlehem

Sun 27/9

06:20-06:45

1 stop19h 25m

£698

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 3/7

15:00-00:23

1 stop14h 23m

Allentown-Bethlehem

Tue 14/7

19:09-12:10

1 stop12h 01m

£707

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 13/7

06:50-09:58

2 stops32h 08m

Allentown-Bethlehem

Thu 30/7

06:15-05:55

2 stops18h 40m

£732

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 3/7

09:40-23:08

2 stops18h 28m

Allentown-Bethlehem

Tue 14/7

06:30-13:15

1 stop25h 45m

£740

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 6/7

14:10-09:58

1 stop24h 48m

Allentown-Bethlehem

Mon 13/7

10:35-06:45

1 stop15h 10m

£749

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 19/7

07:30-09:58

2 stops31h 28m

Allentown-Bethlehem

Mon 3/8

17:41-11:55

1 stop13h 14m

£863

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 24/7

08:00-09:58

1 stop30h 58m

Allentown-Bethlehem

Fri 31/7

10:35-06:45

1 stop15h 10m

£882
Fastest return journey

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 19/7

15:15-23:27

1 stop13h 12m

Allentown-Bethlehem

Mon 3/8

17:12-11:15

1 stop13h 03m

£902
Cheapest one-way

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 5/9

13:10-22:20

1 stop14h 10m

£488

Flights are sorted by cheapest return flights first.

Deals found on 9/6

Showing 1-10 of 20 resultsSorted by cheapest first
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.

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 and United Airlines fly from London Heathrow Airport to Allentown in about 13h 23m. The time it takes to get you to your destination can typically vary by up to 17h 42m. 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.