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Cheap flights from London to Allentown from £425

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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ABE
8 Apr — 15 Apr1
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 9 March 2026.

Tue 21/409:20
LHR
-
ABE
1 stop12h 59m
Virgin Atlantic
Tue 28/417:59
ABE
-
LHR
1 stop12h 21m
Virgin Atlantic
Deal found 7/3£620
Tue 21/406:15
LHR
-
ABE
2 stops21h 45m
Delta
Tue 28/406:33
ABE
-
LHR
1 stop25h 42m
Delta
Deal found 7/3£638
Wed 22/408:55
LHR
-
ABE
2 stops19h 05m
Delta
Wed 29/412:53
ABE
-
LHR
2 stops18h 12m
Delta
Deal found 8/3£640
Wed 8/711:15
LHR
-
ABE
1 stop16h 41m
Virgin Atlantic
Wed 5/813:00
ABE
-
LHR
1 stop12h 25m
Virgin Atlantic
Deal found 6/3£645
Wed 22/416:55
LHR
-
ABE
1 stop12h 27m
American Airlines
Wed 29/412:00
ABE
-
LHR
1 stop16h 05m
American Airlines
Deal found 8/3£652
Wed 8/706:15
LHR
-
ABE
2 stops21h 41m
Delta
Wed 5/813:00
ABE
-
LHR
2 stops18h 05m
Delta
Deal found 6/3£665
Sat 2/511:15
LHR
-
ABE
1 stop16h 45m
Delta
Sun 10/518:15
ABE
-
LHR
2 stops15h 20m
Delta
Deal found 7/3£676
Sat 18/415:15
LHR
-
ABE
1 stop25h 57m
Delta
Sat 25/417:59
ABE
-
LHR
2 stops21h 11m
Delta
Deal found 4/3£704
Sat 2/512:25
LHR
-
ABE
2 stops28h 47m
Delta
Sat 9/518:15
ABE
-
LHR
2 stops20h 55m
Delta
Deal found 8/3£708
Sat 2/509:20
LHR
-
ABE
1 stop18h 40m
KLM
Sat 9/512:59
ABE
-
LHR
1 stop19h 16m
KLM
Deal found 8/3£712

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 9 March 2026.

Round-trip from

£620

One-way from

£425
Virgin Atlantic
  • Virgin Atlantic
  • 21/4-28/4
  • 2 total stops
  • 25h 20m total
  • London to Allentown
Search Deals
Delta
  • Delta
  • 4/5
  • 1 total stop
  • 12h 59m total
  • London to Allentown
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 9 March 2026.
Use the filters below to find and compare flights from London to Allentown that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 21/4

06:15-23:00

2 stops21h 45m

Allentown-Bethlehem

Tue 28/4

06:33-13:15

1 stop25h 42m

£638

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 18/4

15:15-12:12

1 stop25h 57m

Allentown-Bethlehem

Sat 25/4

17:59-20:10

2 stops21h 11m

£704
Fastest return journey

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 2/5

13:25-23:00

1 stop14h 35m

Allentown-Bethlehem

Sat 9/5

12:59-13:15

1 stop19h 16m

£708

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 18/4

11:15-23:00

1 stop16h 45m

Allentown-Bethlehem

Sat 25/4

12:53-13:15

1 stop19h 22m

£714

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 2/5

12:00-00:22

1 stop17h 22m

Allentown-Bethlehem

Sat 9/5

12:00-07:45

2 stops38h 45m

£723

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 22/4

09:30-09:48

2 stops29h 18m

Allentown-Bethlehem

Sun 26/4

10:35-07:55

2 stops40h 20m

£774
Cheapest one-way

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 3/5

09:20-17:19

1 stop12h 59m

£467

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 21/8

17:55-17:17

2 stops28h 22m

£488

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 20/4

07:30-21:17

2 stops18h 47m

£510

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 4/4

07:25-21:17

2 stops18h 52m

£755

Flights are sorted by cheapest return flights first.

Deals found on 4/3

Showing 1-10 of 15 resultsSorted by cheapest first
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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 £299). Flying from London to Allentown in June is currently the most expensive (average of £354). 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 60% 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 £485.

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 29m.

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 Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 43m.

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 KLM fly from London to Allentown in about 16h 45m. The time it takes to get you to your destination can typically vary by up to 5h. 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 £299). Flying from London to Allentown in June is currently the most expensive (average of £354). 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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