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Cheap flights from London to Allentown from £432

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 16/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ABE
23 Mar — 30 Mar1
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 21 February 2026.

Mon 23/1109:30
LHR
-
ABE
2 stops18h 16m
Virgin Atlantic
Sun 29/1117:40
ABE
-
LHR
1 stop31h 45m
Virgin Atlantic
Deal found 18/2£618
Tue 7/413:25
LHR
-
ABE
1 stop27h 51m
Delta
Tue 14/412:52
ABE
-
LHR
2 stops18h 13m
Delta
Deal found 21/2£646
Tue 7/409:15
LHR
-
ABE
1 stop19h 13m
American Airlines
Tue 14/412:57
ABE
-
LHR
1 stop15h 08m
American Airlines
Deal found 21/2£653
Tue 24/209:55
LHR
-
ABE
1 stop18h 36m
American Airlines
Mon 4/512:00
ABE
-
LHR
2 stops17h 15m
American Airlines
Deal found 17/2£712
Mon 23/1111:45
LHR
-
ABE
2 stops29h 19m
Delta
Sun 29/1106:30
ABE
-
LHR
2 stops23h 00m
Delta
Deal found 18/2£728
Thu 26/214:45
LHR
-
ABE
1 stop14h 44m
American Airlines
Tue 28/412:57
ABE
-
LHR
2 stops16h 18m
American Airlines
Deal found 17/2£742
Thu 16/416:55
LHR
-
ABE
1 stop12h 27m
American Airlines
Tue 28/412:57
ABE
-
LHR
2 stops13h 48m
American Airlines
Deal found 18/2£745
Tue 24/207:30
LHR
-
ABE
2 stops21h 01m
American Airlines
Thu 30/406:04
ABE
-
LHR
2 stops18h 46m
American Airlines
Deal found 17/2£756
Wed 25/206:30
LHR
-
ABE
2 stops15h 42m
Delta
Sun 3/512:53
ABE
-
LHR
2 stops20h 42m
Delta
Deal found 17/2£758
Fri 27/213:10
LHR
-
ABE
2 stops16h 19m
American Airlines
Tue 14/412:57
ABE
-
LHR
2 stops16h 18m
American Airlines
Deal found 20/2£765
Tue 24/208:55
LHR
-
ABE
1 stop13h 17m
Delta
Mon 4/517:59
ABE
-
LHR
1 stop14h 16m
Delta
Deal found 17/2£771

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 21 February 2026.

Round-trip from

£646

One-way from

£432

Popular in

July

Cheapest in

September

Average price

£367
Delta
  • Delta
  • 7/4-14/4
  • 3 total stops
  • 46h 04m total
  • London to Allentown
Search Deals
Delta
  • Delta
  • 16/6
  • 1 total stop
  • 14h 31m total
  • London to Allentown
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£27 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 21 February 2026.
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

Tue 7/4

13:25-12:16

1 stop27h 51m

Allentown-Bethlehem

Tue 14/4

12:52-12:05

2 stops18h 13m

£646

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 16/4

14:10-00:22

2 stops15h 12m

Allentown-Bethlehem

Tue 28/4

12:57-07:45

2 stops13h 48m

£745

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 20/3

09:10-20:50

2 stops15h 40m

Allentown-Bethlehem

Fri 27/3

18:51-05:30

2 stops30h 39m

£871

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 21/3

06:50-20:50

2 stops18h 00m

Allentown-Bethlehem

Sat 28/3

10:31-05:45

1 stop15h 14m

£914

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 6/4

14:10-09:48

1 stop24h 38m

Allentown-Bethlehem

Mon 13/4

17:38-11:45

1 stop13h 07m

£1,111

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 4/4

08:00-17:03

1 stop14h 03m

Allentown-Bethlehem

Sat 11/4

17:38-06:45

1 stop32h 07m

£1,155

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 29/3

08:00-17:03

1 stop14h 03m

Allentown-Bethlehem

Tue 7/4

17:38-11:45

1 stop13h 07m

£1,442

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 29/3

10:45-22:56

2 stops17h 11m

Allentown-Bethlehem

Tue 7/4

12:57-07:15

1 stop13h 18m

£2,283

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 8/4

13:25-22:52

1 stop14h 27m

£441

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 8/4

14:10-00:22

2 stops15h 12m

£445

Flights are sorted by cheapest return flights first.

Deals found on 17/2

Showing 1-10 of 16 results
1
2

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, March is the cheapest month in which you can book a flight from London to Allentown (average of £298). Flying from London to Allentown in June is currently the most expensive (average of £355). 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 62% 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 £483.

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 0 different airlines.

  • How long is the flight from London to Allentown?

    Airlines like Delta and American Airlines fly from London to Allentown in about 15h 12m. The time it takes to get you to your destination can typically vary by up to 12h 39m. 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.

  • 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, March is the cheapest month in which you can book a flight from London to Allentown (average of £298). Flying from London to Allentown in June is currently the most expensive (average of £355). 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

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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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