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

According to our current data, Finnair (£469), offers the cheapest pricing from London Heathrow Airport to Allentown.

In terms of precipitation, rainfall in Allentown ranges from 69.0 - 127.0 inches per month. July is typically the wettest month, when rainfall can reach 127.0 mm. February is typically the driest time to visit Allentown when rainfall is around 69.0 mm.

If weather is an important factor for your trip to Allentown, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -2.0 C).

What is the cheapest month to fly from London Heathrow Airport to Allentown?

The best pricing can be found in the month of April. Prices to Allentown from London Heathrow Airport average £633. You can even find prices in April for less than £633, as users have found deals to Allentown from as low as £476. The month of August appears to be one of the more expensive times to travel to Allentown from London Heathrow Airport. Flying in the targeted month can save you up to 87%.

What is the cheapest time of day to fly from LHR to ABE?

It’s optimal to fly from London Heathrow Airport to Allentown at midday. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the morning.

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.

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.

£427+ Flights from London Heathrow Airport to Allentown

Cheap flight deals from Heathrow to Allentown

Round-trip from	£557
One-way from	£427
Popular in	August
Cheapest in	April
Average price	£1,184

American Airlines
24/12-7/1
4 total stops
31h 12m total
London to Allentown

Search Deals

8/11
3 total stops
43h 52m total
London to Allentown

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£116 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 10% potential price decrease (£46 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Heathrow to Allentown

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 15 August 2025.

Wed 24/1212:55LHR - ABE

2 stops16h 21mAmerican Airlines

Wed 7/113:39ABE - LHR

2 stops14h 51mAmerican Airlines

Deal found 13/8£557

Fri 3/1013:05LHR - ABE

1 stop14h 36mVirgin Atlantic

Mon 6/1006:00ABE - LHR

1 stop19h 45mVirgin Atlantic

Deal found 12/8£560

Wed 24/1212:55LHR - ABE

2 stops16h 21mAmerican Airlines

Tue 6/113:39ABE - LHR

1 stop14h 36mAmerican Airlines

Deal found 13/8£567

Fri 3/1006:30LHR - ABE

2 stops16h 01mDelta

Mon 6/1006:00ABE - LHR

2 stops21h 50mDelta

Deal found 13/8£569

Wed 24/1212:30LHR - ABE

1 stop15h 44mDelta

Tue 6/113:00ABE - LHR

1 stop13h 50mDelta

Deal found 13/8£574

Thu 25/1214:10LHR - ABE

2 stops15h 06mAmerican Airlines

Wed 7/113:39ABE - LHR

2 stops12h 31mAmerican Airlines

Deal found 13/8£586

Thu 25/1210:45LHR - ABE

1 stop17h 29mDelta

Tue 6/113:00ABE - LHR

1 stop12h 25mDelta

Deal found 13/8£603

Mon 29/906:50LHR - ABE

2 stops15h 03mUnited Airlines

Mon 6/1013:00ABE - LHR

1 stop12h 20mUnited Airlines

Deal found 14/8£630

Best flights from Heathrow to Allentown
Discover carefully curated flight deals from Heathrow to Allentown that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 August 2025.

Wed 24/1212:55LHR - ABE

2 stops16h 21mAmerican Airlines

Wed 7/119:59ABE - LHR

1 stop11h 01mAmerican Airlines

Deal found 13/8£557

Fri 3/1013:05LHR - ABE

1 stop14h 36mVirgin Atlantic

Mon 6/1006:00ABE - LHR

1 stop19h 45mVirgin Atlantic

Deal found 12/8£560

Fri 3/1006:30LHR - ABE

2 stops16h 01mDelta

Mon 6/1006:00ABE - LHR

2 stops21h 50mDelta

Deal found 13/8£569

Wed 24/1212:55LHR - ABE

2 stops16h 21mAmerican Airlines

Tue 6/113:39ABE - LHR

1 stop14h 36mAmerican Airlines

Deal found 13/8£567

Last-minute flights from Heathrow to Allentown
Discover last-minute flight deals from Heathrow to Allentown. Data last updated 15 August 2025 and is based on user searches.

Fri 15/811:05LHR - ABE

1 stop15h 50mUnited Airlines

Thu 4/913:00ABE - LHR

1 stop12h 20mUnited Airlines

Deal found 14/8£2,062

Sun 17/806:30LHR - ABE

2 stops21h 27mDelta

Sun 24/818:14ABE - LHR

1 stop31h 31mDelta

Deal found 15/8£943

Sun 17/817:25LHR - ABE

1 stop23h 51mDelta

Sat 23/818:14ABE - LHR

1 stop32h 01mDelta

Deal found 15/8£987

Sun 17/808:30LHR - ABE

1 stop13h 30mUnited Airlines

Thu 21/817:28ABE - LHR

1 stop13h 17mUnited Airlines

Deal found 15/8£1,568

Sun 17/813:05LHR - ABE

1 stop14h 52mDelta

Thu 21/812:56ABE - LHR

2 stops14h 54mDelta

Deal found 15/8£1,858

Mon 18/809:55LHR - ABE

2 stops18h 02mDelta

Sun 24/818:14ABE - LHR

1 stop32h 01mDelta

Deal found 15/8£913

Mon 18/811:00LHR - ABE

1 stop12h 00mAmerican Airlines

Tue 19/818:32ABE - LHR

1 stop12h 58mAmerican Airlines

Deal found 15/8£2,541

Mon 29/906:50LHR - ABE

2 stops15h 03mUnited Airlines

Mon 6/1013:00ABE - LHR

1 stop12h 20mUnited Airlines

Deal found 14/8£630

One-way flights from Heathrow to Allentown
Search for one-way flight options from Heathrow to Allentown. Find affordable one-way fares based on user searches. Data last updated 15 August 2025.

Sat 8/1106:00LHR - ABE

3 stops43h 52mMultiple Airlines

Deal found 13/8£427

Tue 7/1008:45LHR - ABE

2 stops30h 53mUnited Airlines

Deal found 13/8£1,268

Wed 20/806:30LHR - ABE

2 stops16h 04mDelta

Deal found 15/8£2,105

Tue 16/908:45LHR - ABE

2 stops32h 13mUnited Airlines

Deal found 15/8£2,305

Fri 12/909:20LHR - ABE

1 stop13h 11mDelta

Deal found 13/8£7,995

Cheapflights Fare Finder

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 24/12

12:55-00:16

2 stops16h 21m

Allentown-Bethlehem

Wed 7/1

19:59-12:00

1 stop11h 01m

£557

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 3/10

13:05-22:41

1 stop14h 36m

Allentown-Bethlehem

Mon 6/10

06:00-06:45

1 stop19h 45m

£560

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 24/12

12:55-00:16

2 stops16h 21m

Allentown-Bethlehem

Tue 6/1

13:39-09:15

1 stop14h 36m

£567

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 3/10

06:30-17:31

2 stops16h 01m

Allentown-Bethlehem

Mon 6/10

06:00-08:50

2 stops21h 50m

£569

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 8/11

06:00-20:52

3 stops43h 52m

£427

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 7/10

08:45-10:38

2 stops30h 53m

£1,268

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 20/8

06:30-17:34

2 stops16h 04m

£2,105

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 21/8

06:30-17:34

2 stops16h 04m

£2,105

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 16/9

09:20-17:31

1 stop13h 11m

£2,118

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 16/9

08:45-11:58

2 stops32h 13m

£2,305

Flights are sorted by cheapest return flights first.

Deals found on 13/8

Showing 1-10 of 11 results

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’s the top stopover airport for flights from London Heathrow Airport to Allentown?

Atlanta (ATL) – chosen by Cheapflights users on 47% of one-stop itineraries from London Heathrow Airport to Allentown on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Allentown?

Philadelphia (PHL) is the most affordable one-stop option, with an average return flight price of £574.

What’s the fastest stopover option from London Heathrow Airport to Allentown?

Flights via Charlotte (CLT) have the shortest average one-way travel time for one-stop routes: 12h 08m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Allentown?

Flights via Charlotte (CLT) offer the fastest connection on this route, with an average stopover time of 1h 00m.

Reviews of airlines servicing Allentown

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

1,321 reviews

Check prices

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

1,321 reviews

Finnair

7.6

Good

1,321 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Related info for your journey

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.
What is the cheapest airline to fly from London Heathrow Airport to Allentown round-trip?
According to our current data, Finnair (£469), 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.

See more FAQs

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Alternative routes for Heathrow to Allentown

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Top airline flying from Heathrow to Allentown

Airline	Cheapest	Average	Flexibility	On-time
Finnair	Cheapest£469	Average£561	FlexibilityNo cancel fee	On-time76%	Search Finnair flights

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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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Cheap flights from London Heathrow Airport to Allentown from £427

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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Allentown

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Heathrow to Allentown

Cheapest flights from Heathrow to AllentownExplore 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 15 August 2025.

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 15 August 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Allentown that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Allentown

What’s the top stopover airport for flights from London Heathrow Airport to Allentown?

Share of one-stop return flights from London Heathrow Airport to Allentown chosen by Cheapflights users in the past 12 months, using the same stopover each way.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Allentown?

Average return fare for one-stop flights from London Heathrow Airport to Allentown, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

What’s the fastest stopover option from London Heathrow Airport to Allentown?

Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Allentown, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Allentown?

Average stopover duration for one-stop one-way flights from London Heathrow Airport to Allentown, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Allentown

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.

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?

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

Can I find deals for flights from Heathrow to Allentown that include hotel bookings?

How can I find direct flights from Heathrow to Allentown?

Can I find deals for business class flights from Heathrow to Allentown?

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.

Alternative routes for Heathrow to Allentown

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Heathrow to Allentown

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How does Cheapflights help users find flights from Heathrow to Allentown?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Allentown?

Can Cheapflights find flights from Heathrow to Allentown with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Allentown become cheaper?

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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 15 August 2025.