How long is the flight from London to Allentown?

Airlines like United Airlines and American Airlines fly from London to Allentown in about 14h 22m. The time it takes to get you to your destination can typically vary by up to 57m. The distance between London and Allentown is about 3507 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

Our cheapest airline available from London to Allentown is Finnair. Our recent data shows that you can find tickets from as low as £546 on this airline. This flight start at 9% lower than the current average price 3 months from now.

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 time of day to fly from LON to ABE?

When flying from London to Allentown, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly into for flights to Allentown from London?

If you book a flight to Allentown from London, you will be flying to Allentown-Bethlehem, which is the city’s only airport. Allentown-Bethlehem (ABE) is located 3.9 mi from the center of Allentown. There are 0 flights from London to Allentown-Bethlehem per day from 1 airline.

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

Yes. In addition to deals on London to Allentown flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from London to Allentown?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Allentown.

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

Yes. Cheapflights offers flight deals from London 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.

£404+ Cheap Flights from London to Allentown

Q: How much does it cost for a return flight from London to Allentown?

Airfare is above average for this route at the moment. London to Allentown flights typically cost between £588 and £597 in December. The cheapest return flight price found within the last 3 days was £730 on United Airlines (2 Dec-9 Dec).

Cheap flight deals from London to Allentown

Round-trip from	£730
One-way from	£404
Popular in	December
Cheapest in	April
Average price	£592

United Airlines
2/12-9/12
2 total stops
26h 17m total
London to Allentown

Search Deals

Delta
19/1
1 total stop
13h 23m total
London to Allentown

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£55 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).

Search Deals

Average for round-trip flights in November 2025

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Find flight deals from London to Allentown

Enter your travel dates to find the best prices.

Cheapest flights from London to Allentown
Explore the most affordable flight options available from London to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 November 2025.

Tue 2/1207:25LHR - ABE

1 stop14h 22mUnited Airlines

Tue 9/1213:00ABE - LHR

1 stop11h 55mUnited Airlines

Deal found 4/11£730

Sat 27/1207:40LHR - ABE

1 stop13h 50mUnited Airlines

Wed 7/111:30ABE - LHR

1 stop13h 25mUnited Airlines

Deal found 5/11£838

Fri 19/1208:55LHR - ABE

1 stop13h 19mVirgin Atlantic

Fri 26/1212:49ABE - LHR

1 stop17h 51mVirgin Atlantic

Deal found 4/11£901

Fri 19/1210:45LHR - ABE

1 stop16h 26mMultiple Airlines

Fri 26/1218:04ABE - LHR

2 stops32h 01mMultiple Airlines

Deal found 4/11£980

Fri 19/1207:25LHR - ABE

1 stop19h 22mUnited Airlines

Fri 26/1206:17ABE - LHR

1 stop18h 38mUnited Airlines

Deal found 4/11£1,646

Sat 13/1208:55LHR - ABE

1 stop13h 19mDelta

Fri 9/117:58ABE - LHR

1 stop12h 42mDelta

Deal found 3/11£1,732

Best flights from London to Allentown
Discover carefully curated flight deals from London to Allentown that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 November 2025.

Tue 2/1207:25LHR - ABE

1 stop14h 22mUnited Airlines

Tue 9/1213:00ABE - LHR

1 stop11h 55mUnited Airlines

Deal found 4/11£730

Fri 27/312:55LHR - ABE

2 stops15h 19mAmerican Airlines

Tue 31/317:47ABE - LHR

2 stops12h 28mAmerican Airlines

Deal found 5/11£814

Thu 8/106:35LHR - ABE

2 stops19h 40mUnited Airlines

Thu 22/116:57ABE - LHR

1 stop13h 18mUnited Airlines

Deal found 5/11£747

Sat 27/1207:40LHR - ABE

1 stop13h 50mUnited Airlines

Wed 7/111:30ABE - LHR

1 stop13h 25mUnited Airlines

Deal found 5/11£838

Last-minute flights from London to Allentown
Discover last-minute flight deals from London to Allentown. Data last updated 6 November 2025 and is based on user searches.

Tue 2/1207:25LHR - ABE

1 stop14h 22mUnited Airlines

Tue 9/1213:00ABE - LHR

1 stop11h 55mUnited Airlines

Deal found 4/11£730

Sat 13/1208:55LHR - ABE

1 stop13h 19mDelta

Fri 9/117:58ABE - LHR

1 stop12h 42mDelta

Deal found 3/11£1,732

Fri 19/1208:55LHR - ABE

1 stop13h 19mVirgin Atlantic

Fri 26/1212:49ABE - LHR

1 stop17h 51mVirgin Atlantic

Deal found 4/11£901

Fri 19/1210:45LHR - ABE

1 stop16h 26mMultiple Airlines

Fri 26/1218:04ABE - LHR

2 stops32h 01mMultiple Airlines

Deal found 4/11£980

Fri 19/1207:25LHR - ABE

1 stop19h 22mUnited Airlines

Fri 26/1206:17ABE - LHR

1 stop18h 38mUnited Airlines

Deal found 4/11£1,646

Sat 27/1207:40LHR - ABE

1 stop13h 50mUnited Airlines

Wed 7/111:30ABE - LHR

1 stop13h 25mUnited Airlines

Deal found 5/11£838

One-way flights from London to Allentown
Search for one-way flight options from London to Allentown. Find affordable one-way fares based on user searches. Data last updated 6 November 2025.

Mon 19/108:55LHR - ABE

1 stop13h 23mDelta

Deal found 3/11£404

Sat 27/1215:50LHR - ABE

1 stop25h 19mDelta

Deal found 5/11£458

Mon 29/1208:55LHR - ABE

1 stop18h 51mDelta

Deal found 5/11£463

Thu 11/1216:10LHR - ABE

2 stops35h 48mAmerican Airlines

Deal found 3/11£476

Mon 29/1220:45LHR - ABE

2 stops44h 34mMultiple Airlines

Deal found 5/11£482

Thu 11/1215:50LHR - ABE

1 stop25h 24mDelta

Deal found 3/11£506

Mon 15/1208:55LHR - ABE

1 stop13h 19mDelta

Deal found 4/11£534

Fri 12/1216:10LHR - ABE

2 stops29h 34mAmerican Airlines

Deal found 3/11£549

Tue 18/1106:30LHR - ABE

2 stops15h 49mDelta

Deal found 4/11£574

Fri 12/1208:55LHR - ABE

1 stop13h 19mDelta

Deal found 3/11£579

Mon 17/1108:55LHR - ABE

1 stop13h 24mDelta

Deal found 5/11£585

Fly from

Fly to

Route

Depart

Return

Price

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 2/12

07:25-16:47

1 stop14h 22m

Allentown-Bethlehem

Tue 9/12

13:00-05:55

1 stop11h 55m

£730

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 8/1

06:35-21:15

2 stops19h 40m

Allentown-Bethlehem

Thu 22/1

16:57-11:15

1 stop13h 18m

£747

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 27/3

12:55-00:14

2 stops15h 19m

Allentown-Bethlehem

Tue 31/3

17:47-11:15

2 stops12h 28m

£814

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 27/12

07:40-16:30

1 stop13h 50m

Allentown-Bethlehem

Wed 7/1

11:30-05:55

1 stop13h 25m

£838

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 19/1

08:55-17:18

1 stop13h 23m

£404

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 27/12

15:50-12:09

1 stop25h 19m

£458

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 11/12

16:10-22:58

2 stops35h 48m

£476

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 11/12

15:50-12:14

1 stop25h 24m

£506

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 15/12

08:55-17:14

1 stop13h 19m

£534

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 12/12

16:10-16:44

2 stops29h 34m

£549

Flights are sorted by cheapest return flights first.

Deals found on 3/11

Showing 1-10 of 14 results

Best time to book a flight from London to Allentown

Have a flexible travel schedule? Discover the best time to fly to Allentown from London 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 to Allentown

What is the cheapest month to book a flight from London to Allentown?

Currently, November is the cheapest month in which you can book a flight from London to Allentown (average of £232). Flying from London to Allentown in June is currently the most expensive (average of £367). 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.

How much does it cost for a return flight from London to Allentown?

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

Atlanta (ATL) – chosen by Cheapflights users on 52% of one-stop itineraries from London to Allentown on Cheapflights.

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

Charlotte (CLT) is the most affordable one-stop option, with an average return flight price of £499.

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

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

Related info for your journey

What airport do you fly into for flights to Allentown from London?
If you book a flight to Allentown from London, you will be flying to Allentown-Bethlehem, which is the city’s only airport. Allentown-Bethlehem (ABE) is located 3.9 mi from the center of Allentown. There are 0 flights from London to Allentown-Bethlehem per day from 1 airline.
How long is the flight from London to Allentown?
Airlines like United Airlines and American Airlines fly from London to Allentown in about 14h 22m. The time it takes to get you to your destination can typically vary by up to 57m. The distance between London and Allentown is about 3507 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What is the cheapest airline to fly from London to Allentown round-trip?
Our cheapest airline available from London to Allentown is Finnair. Our recent data shows that you can find tickets from as low as £546 on this airline. This flight start at 9% lower than the current average price 3 months from now.
Can I find deals for flights from London to Allentown that include hotel bookings?
Yes. In addition to deals on London to Allentown flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to Allentown?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Allentown.
Can I find deals for business class flights from London to Allentown?
Yes. Cheapflights offers flight deals from London 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 to Allentown?
Currently, November is the cheapest month in which you can book a flight from London to Allentown (average of £232). Flying from London to Allentown in June is currently the most expensive (average of £367). 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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from London to Allentown

Airline	Cheapest	Average	Flexibility	On-time
Finnair	Cheapest£546	Average£618	FlexibilityNo cancel fee	On-time76%	Search Finnair flights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from London to Allentown. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Allentown from London.

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

Need flexible booking options for your flight to Allentown from London? 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 London to Allentown become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Allentown from London today and book when prices fit your budget.

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Cheap flights from London to Allentown from £404

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 19/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to Allentown

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from London to Allentown

Cheapest flights from London to AllentownExplore the most affordable flight options available from London to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 November 2025.

Explore the most affordable flight options available from London to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 November 2025.

Cheapflights Fare Finder

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

Best time to book a flight from London to Allentown

Have a flexible travel schedule? Discover the best time to fly to Allentown from London with our price prediction graph.

Cheapflights Insights

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

What is the cheapest month to book a flight from London to Allentown?

How much does it cost for a return flight from London to Allentown?

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

Share of one-stop return flights from London 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 to Allentown?

Average return fare for one-stop flights from London 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 to Allentown?

Shortest average travel time for one-stop one-way flights from London 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 to Allentown?

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

Related info for your journey

Find useful and relevant information for your journey from London 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?

How long is the flight from London to Allentown?

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

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

How can I find direct flights from London to Allentown?

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

What is the cheapest month to book a flight from London to Allentown?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to Allentown

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

Top airline flying from London to Allentown

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

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

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Cheapest flights from London to Allentown
Explore the most affordable flight options available from London to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 November 2025.