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Cheap flights from London to Allentown from £520

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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ABE
23 Dec — 30 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Allentown

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 23 November 2025.

Round-trip from

£589

One-way from

£520
American Airlines
  • American Airlines
  • 21/1-25/1
  • 3 total stops
  • 28h 49m total
  • London to Allentown
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United Airlines
  • United Airlines
  • 6/1
  • 2 total stops
  • 38h 55m total
  • London to Allentown
Search Deals

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 23 November 2025.

Sat 20/1210:25LHR - ABE
1 stop32h 30mUnited Airlines
Sat 27/1217:07ABE - LHR
1 stop31h 48mUnited Airlines
Deal found 22/11£1,521
Thu 27/1120:25LHR - ABE
2 stops30h 01mKLM
Sat 29/1118:00ABE - LHR
1 stop12h 40mKLM
Deal found 23/11£2,531
Thu 27/1111:15LHR - ABE
1 stop31h 14mAmerican Airlines
Sat 29/1117:10ABE - LHR
1 stop11h 05mAmerican Airlines
Deal found 23/11£2,556
Thu 27/1116:20LHR - ABE
2 stops24h 28mUnited Airlines
Sat 29/1106:32ABE - LHR
2 stops19h 38mUnited Airlines
Deal found 23/11£3,336

Cheapflights Fare Finder

 
Customise your flight search to find flights from London 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 23 November 2025.
Use the filters below to find and compare flights from London to Allentown that are best for you.

Fly from

London

Fly to

Allentown

Route

Depart

Return

Price

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 21/1

08:20-22:26

2 stops19h 06m

Allentown-Bethlehem

Sun 25/1

13:02-10:10

2 stops16h 08m

£591

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 7/1

09:10-21:05

2 stops16h 55m

Allentown-Bethlehem

Wed 14/1

11:30-05:55

1 stop13h 25m

£752

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 6/1

18:00-21:05

2 stops32h 05m

Allentown-Bethlehem

Tue 13/1

16:57-11:15

1 stop13h 18m

£762

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 9/1

13:35-10:41

1 stop26h 06m

Allentown-Bethlehem

Sat 17/1

11:30-05:55

1 stop13h 25m

£789

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 31/12

06:50-21:47

2 stops19h 57m

£601

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 6/1

07:25-10:41

1 stop32h 16m

£686

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 18/5

09:20-17:17

1 stop12h 57m

£792

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 1/1

06:50-21:47

2 stops19h 57m

£886

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 2/1

09:00-16:30

2 stops36h 30m

£957

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 4/1

06:50-21:47

2 stops19h 57m

£1,097

Flights are sorted by cheapest return flights first.

Deals found on 22/11

Showing 1-10 of 11 results
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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, April is the cheapest month in which you can book a flight from London to Allentown (average of £295). Flying from London to Allentown in June is currently the most expensive (average of £365). 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.

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.

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?

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.

Charlotte (CLT) is the most affordable one-stop option, with an average return flight price of £496.

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.

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?

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.

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

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?

    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 American Airlines fly from London to Allentown in about 19h 06m. The time it takes to get you to your destination can typically vary by up to . The distance between London and Allentown is about 3507 mi.

  • 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 £543 on this 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.

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

    Currently, April is the cheapest month in which you can book a flight from London to Allentown (average of £295). Flying from London to Allentown in June is currently the most expensive (average of £365). 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 London 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 London to Allentown

Discover the top airline that operate flights from London 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 23 November 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£543Average£615FlexibilityNo 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 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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