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Cheap flights from London to Allentown from £644

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ABE
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap 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 5 December 2025.

Fri 19/1207:25LHR - ABE
1 stop14h 05mUnited Airlines
Thu 1/106:17ABE - LHR
1 stop20h 38mUnited Airlines
Deal found 3/12£1,500

Find 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 5 December 2025.

Round-trip from

£543
American Airlines
  • American Airlines
  • 21/1-25/1
  • 4 total stops
  • 44h 04m total
  • London to Allentown
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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 5 December 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

12:05-10:41

2 stops51h 36m

Allentown-Bethlehem

Sun 25/1

11:30-06:40

2 stops14h 10m

£644

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 18/1

10:25-21:05

1 stop15h 40m

Allentown-Bethlehem

Sun 25/1

11:30-05:55

1 stop13h 25m

£808

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 17/1

10:25-21:05

1 stop15h 40m

Allentown-Bethlehem

Sat 24/1

11:30-05:55

1 stop13h 25m

£968

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 19/12

07:25-16:30

1 stop14h 05m

Allentown-Bethlehem

Thu 1/1

06:17-07:55

1 stop20h 38m

£1,500

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 23/2

08:00-21:01

2 stops18h 01m

Allentown-Bethlehem

Thu 26/2

06:33-07:55

1 stop20h 22m

£2,341

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 11/12

08:55-17:14

1 stop13h 19m

£881

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 12/12

08:55-17:14

1 stop13h 19m

£965

Flights are sorted by cheapest return flights first.

Deals found on 3/12

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 £290). Flying from London to Allentown in June is currently the most expensive (average of £358). 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 48% 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 £487.

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 United Airlines fly from London to Allentown in about 51h 36m. 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 £533 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 £290). Flying from London to Allentown in June is currently the most expensive (average of £358). 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 5 December 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£533Average£570FlexibilityNo 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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