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Cheap flights from London Heathrow Airport to Allentown from £386

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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ABE
11 Feb — 18 Feb1
1 adult
1 adult, Economy, 0 bags

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 12 January 2026.

Round-trip from

£544

One-way from

£386
American Airlines
  • American Airlines
  • 23/3-14/4
  • 3 total stops
  • 47h 25m total
  • London to Allentown
Search Deals
3/2
  • 3/2
  • 3 total stops
  • 51h 13m total
  • London to Allentown
Search Deals

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 12 January 2026.

Mon 23/309:55LHR - ABE
1 stop29h 45mAmerican Airlines
Tue 14/406:00ABE - LHR
1 stop19h 55mAmerican Airlines
Deal found 10/1£544
Tue 24/315:50LHR - ABE
1 stop24h 16mDelta
Wed 15/417:59ABE - LHR
1 stop14h 16mDelta
Deal found 10/1£561
Sun 22/314:10LHR - ABE
2 stops14h 19mAmerican Airlines
Tue 14/412:57ABE - LHR
1 stop12h 58mAmerican Airlines
Deal found 10/1£574
Mon 23/320:00LHR - ABE
2 stops20h 06mDelta
Fri 17/412:47ABE - LHR
2 stops17h 33mDelta
Deal found 10/1£591
Thu 5/212:05LHR - ABE
2 stops51h 36mUnited Airlines
Mon 9/216:57ABE - LHR
1 stop31h 58mUnited Airlines
Deal found 10/1£606
Mon 23/320:00LHR - ABE
2 stops20h 06mDelta
Mon 13/417:59ABE - LHR
1 stop31h 46mDelta
Deal found 10/1£619
Sun 22/314:10LHR - ABE
2 stops14h 19mAmerican Airlines
Wed 15/412:00ABE - LHR
1 stop13h 55mAmerican Airlines
Deal found 10/1£632
Wed 25/207:40LHR - ABE
1 stop14h 08mUnited Airlines
Wed 4/310:36ABE - LHR
1 stop14h 19mUnited Airlines
Deal found 11/1£680
Fri 20/213:35LHR - ABE
1 stop27h 15mUnited Airlines
Sun 1/310:36ABE - LHR
1 stop14h 19mUnited Airlines
Deal found 11/1£710

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 12 January 2026.
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

Tue 24/3

12:55-23:31

2 stops14h 36m

Allentown-Bethlehem

Tue 14/4

06:00-06:55

1 stop19h 55m

£544

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 23/3

09:55-11:40

1 stop29h 45m

Allentown-Bethlehem

Tue 14/4

06:00-06:55

1 stop19h 55m

£544

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 23/3

20:00-12:06

2 stops20h 06m

Allentown-Bethlehem

Thu 16/4

12:47-11:20

2 stops17h 33m

£561

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 24/3

15:50-12:06

1 stop24h 16m

Allentown-Bethlehem

Wed 15/4

17:59-13:15

1 stop14h 16m

£561

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 24/3

08:55-22:59

1 stop18h 04m

Allentown-Bethlehem

Thu 16/4

12:47-11:20

2 stops17h 33m

£561

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 22/3

14:10-00:29

2 stops14h 19m

Allentown-Bethlehem

Tue 14/4

12:57-06:55

1 stop12h 58m

£574

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 5/2

12:05-10:41

2 stops51h 36m

Allentown-Bethlehem

Mon 9/2

16:57-05:55

1 stop31h 58m

£606

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 24/3

09:40-22:59

2 stops17h 19m

Allentown-Bethlehem

Mon 13/4

17:59-06:45

1 stop31h 46m

£619

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 3/2

14:50-13:03

3 stops51h 13m

£386

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 22/2

08:55-17:12

1 stop13h 17m

£694

Flights are sorted by cheapest return flights first.

Deals found on 11/1

Showing 1-10 of 14 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 £309). Flying from London Heathrow Airport to Allentown in June is currently the most expensive (average of £357). 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 12 January 2026.
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
1,347 reviews
Check prices

Entertainment

6.9

Crew

8.2

Overall

7.6

Food

6.7

Comfort

7.4

Boarding

7.7

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
1,347 reviews
Finnair
7.6
Good
1,347 reviews
Check prices

Entertainment

6.9

Crew

8.2

Overall

7.6

Food

6.7

Comfort

7.4

Boarding

7.7

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 American Airlines and Delta fly from London Heathrow Airport to Allentown in about 14h 36m. The time it takes to get you to your destination can typically vary by up to 5h 30m. 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 (£531), 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 £309). Flying from London Heathrow Airport to Allentown in June is currently the most expensive (average of £357). 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

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 12 January 2026.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£531Average£567FlexibilityNo 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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