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Cheap flights from London Heathrow Airport to Allentown from £424

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 17/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ABE
28 Mar — 4 Apr1
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 26 February 2026.

Wed 8/413:25
LHR
-
ABE
1 stop14h 27m
Virgin Atlantic
Wed 15/417:59
ABE
-
LHR
1 stop14h 16m
Virgin Atlantic
Deal found 22/2£615
Wed 8/408:40
LHR
-
ABE
2 stops19h 12m
Delta
Wed 15/412:52
ABE
-
LHR
2 stops18h 13m
Delta
Deal found 22/2£631
Tue 10/310:00
LHR
-
ABE
2 stops30h 16m
Delta
Sat 14/317:58
ABE
-
LHR
1 stop32h 27m
Delta
Deal found 22/2£643
Tue 10/319:20
LHR
-
ABE
2 stops31h 36m
Virgin Atlantic
Sat 14/312:51
ABE
-
LHR
2 stops38h 59m
Virgin Atlantic
Deal found 22/2£646
Thu 9/406:30
LHR
-
ABE
2 stops21h 22m
Delta
Thu 16/406:33
ABE
-
LHR
2 stops18h 47m
Delta
Deal found 23/2£661
Thu 9/416:55
LHR
-
ABE
1 stop12h 27m
American Airlines
Thu 16/412:00
ABE
-
LHR
1 stop16h 05m
American Airlines
Deal found 23/2£681
Sat 11/410:40
LHR
-
ABE
2 stops16h 31m
KLM
Sat 18/417:59
ABE
-
LHR
1 stop12h 21m
KLM
Deal found 25/2£795
Sat 11/411:05
LHR
-
ABE
2 stops34h 58m
United Airlines
Sat 18/417:40
ABE
-
LHR
2 stops36h 00m
United Airlines
Deal found 25/2£796
Wed 25/307:40
LHR
-
ABE
1 stop13h 11m
United Airlines
Wed 1/406:15
ABE
-
LHR
1 stop19h 30m
United Airlines
Deal found 24/2£808
Sun 12/411:05
LHR
-
ABE
1 stop27h 43m
United Airlines
Sun 19/410:35
ABE
-
LHR
1 stop17h 25m
United Airlines
Deal found 25/2£839

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 26 February 2026.

Round-trip from

£615

One-way from

£424

Popular in

July

Cheapest in

September

Average price

£366
Virgin Atlantic
  • Virgin Atlantic
  • 8/4-15/4
  • 2 total stops
  • 28h 43m total
  • London to Allentown
Search Deals
17/3
  • 17/3
  • 3 total stops
  • 57h 06m total
  • London to Allentown
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£27 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
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 26 February 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

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 8/4

13:25-22:52

1 stop14h 27m

Allentown-Bethlehem

Wed 15/4

17:59-13:15

1 stop14h 16m

£615

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 8/4

08:40-22:52

2 stops19h 12m

Allentown-Bethlehem

Wed 15/4

12:52-12:05

2 stops18h 13m

£631

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 10/3

10:00-12:16

2 stops30h 16m

Allentown-Bethlehem

Sat 14/3

17:58-06:25

1 stop32h 27m

£643

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 10/3

12:30-22:56

1 stop14h 26m

Allentown-Bethlehem

Sat 14/3

17:58-06:25

1 stop32h 27m

£654

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 9/4

06:30-22:52

2 stops21h 22m

Allentown-Bethlehem

Thu 16/4

06:33-06:20

2 stops18h 47m

£661

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 9/4

16:55-00:22

1 stop12h 27m

Allentown-Bethlehem

Thu 16/4

12:00-09:05

1 stop16h 05m

£681

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 11/4

10:40-22:11

2 stops16h 31m

Allentown-Bethlehem

Sat 18/4

17:59-11:20

1 stop12h 21m

£795

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 11/4

11:05-17:03

2 stops34h 58m

Allentown-Bethlehem

Sat 18/4

17:40-10:40

2 stops36h 00m

£796

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 25/3

07:40-16:51

1 stop13h 11m

Allentown-Bethlehem

Wed 1/4

06:15-06:45

1 stop19h 30m

£808

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 12/4

11:05-09:48

1 stop27h 43m

Allentown-Bethlehem

Sun 19/4

10:35-09:00

1 stop17h 25m

£839

Flights are sorted by cheapest return flights first.

Deals found on 23/2

Showing 1-10 of 15 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 £313). Flying from London Heathrow Airport to Allentown in June is currently the most expensive (average of £353). 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 Virgin Atlantic and Delta fly from London Heathrow Airport to Allentown in about 14h 27m. The time it takes to get you to your destination can typically vary by up to 4h 45m. 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 £313). Flying from London Heathrow Airport to Allentown in June is currently the most expensive (average of £353). 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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