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Cheap flights from London to Allentown from £457

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Allentown departing on 30/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from London to Allentown

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
13:10 - 22:18LHR  London Heathrow-ABE Allentown-Bethlehem
14h 08m1 stop Chicago O'Hare Intl
Multiple Airlines Logo
09:13 - 06:50ABE  Allentown-Bethlehem-LHR London Heathrow
16h 37m1 stop Chicago O'Hare Intl
£700Multiple Airlines
Wed, 16 Sep - Wed, 30 Sep
Delta Logo
06:30 - 22:16LHR  London Heathrow-ABE Allentown-Bethlehem
20h 46m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson
Delta Logo
06:25 - 06:20ABE  Allentown-Bethlehem-LHR London Heathrow
18h 55m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl
£703Delta
Tue, 22 Sep - Tue, 29 Sep
Delta Logo
06:30 - 22:16LHR  London Heathrow-ABE Allentown-Bethlehem
20h 46m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson
Delta Logo
06:25 - 06:45ABE  Allentown-Bethlehem-LHR London Heathrow
19h 20m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl
£703Delta
Wed, 16 Sep - Wed, 30 Sep
Delta Logo
13:25 - 22:16LHR  London Heathrow-ABE Allentown-Bethlehem
13h 51m1 stop Atlanta Hartsfield-Jackson
Delta Logo
18:08 - 13:15ABE  Allentown-Bethlehem-LHR London Heathrow
14h 07m1 stop Atlanta Hartsfield-Jackson
£716Delta
Tue, 22 Sep - Tue, 29 Sep
American Airlines Logo
09:15 - 16:27LHR  London Heathrow-ABE Allentown-Bethlehem
12h 12m1 stop Charlotte Douglas
American Airlines Logo
17:10 - 11:15ABE  Allentown-Bethlehem-LHR London Heathrow
13h 05m1 stop Chicago O'Hare Intl
£722American Airlines
Mon, 7 Sep - Mon, 14 Sep
United Airlines Logo
06:50 - 16:56LHR  London Heathrow-ABE Allentown-Bethlehem
15h 06m2 stops Brussels Bruxelles-National Chicago O'Hare Intl
United Airlines Logo
17:43 - 11:55ABE  Allentown-Bethlehem-LHR London Heathrow
13h 12m1 stop Chicago O'Hare Intl
£740United Airlines
Wed, 23 Sep - Wed, 30 Sep
Multiple Airlines Logo
09:15 - 16:27LHR  London Heathrow-ABE Allentown-Bethlehem
12h 12m1 stop Charlotte Douglas
Multiple Airlines Logo
14:25 - 21:40ABE  Allentown-Bethlehem-LHR London Heathrow
26h 15m2 stops Charlotte Douglas New York John F Kennedy Intl
£740Multiple Airlines
Mon, 7 Sep - Mon, 14 Sep
United Airlines Logo
09:00 - 10:06LHR  London Heathrow-ABE Allentown-Bethlehem
30h 06m2 stops Zurich Chicago O'Hare Intl
United Airlines Logo
17:36 - 11:15ABE  Allentown-Bethlehem-LHR London Heathrow
36h 39m2 stops Chicago O'Hare Intl Zurich
£741United Airlines
Wed, 27 Jan - Sun, 31 Jan
United Airlines Logo
06:55 - 09:39LHR  London Heathrow-ABE Allentown-Bethlehem
31h 44m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl
United Airlines Logo
17:36 - 20:40ABE  Allentown-Bethlehem-LHR London Heathrow
22h 04m2 stops Chicago O'Hare Intl Newark
£752United Airlines
Mon, 7 Sep - Mon, 14 Sep
Delta Logo
18:35 - 12:15LHR  London Heathrow-ABE Allentown-Bethlehem
22h 40m2 stops New York John F Kennedy Intl Atlanta Hartsfield-Jackson
Delta Logo
18:04 - 20:10ABE  Allentown-Bethlehem-LHR London Heathrow
21h 06m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl
£778Delta
Fri, 25 Sep - Fri, 2 Oct

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United Airlines flights from London to Allentown

Our best United Airlines deals on London to Allentown flight tickets
United Airlines
23 Sept
LHR06:50London Heathrow
15h 06m
2 stops
ABE16:56Allentown-Bethlehem
30 Sept
ABE17:43Allentown-Bethlehem
13h 12m
1 stop
LHR11:55London Heathrow
£740
United Airlines
27 Jan
LHR09:00London Heathrow
30h 06m
2 stops
ABE10:06Allentown-Bethlehem
31 Jan
ABE17:36Allentown-Bethlehem
36h 39m
2 stops
LHR11:15London Heathrow
£741
United Airlines
7 Sept
LHR06:55London Heathrow
31h 44m
2 stops
ABE09:39Allentown-Bethlehem
14 Sept
ABE17:36Allentown-Bethlehem
22h 04m
2 stops
LHR20:40London Heathrow
£752

Delta flights from London to Allentown

Our best Delta deals on London to Allentown flight tickets
Delta
22 Sept
LHR06:30London Heathrow
20h 46m
2 stops
ABE22:16Allentown-Bethlehem
29 Sept
ABE06:25Allentown-Bethlehem
18h 55m
2 stops
LHR06:20London Heathrow
£703
Delta
16 Sept
LHR06:30London Heathrow
20h 46m
2 stops
ABE22:16Allentown-Bethlehem
30 Sept
ABE06:25Allentown-Bethlehem
19h 20m
2 stops
LHR06:45London Heathrow
£703
Delta
22 Sept
LHR13:25London Heathrow
13h 51m
1 stop
ABE22:16Allentown-Bethlehem
29 Sept
ABE18:08Allentown-Bethlehem
14h 07m
1 stop
LHR13:15London Heathrow
£716

momondo 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, momondo users made 279,928 searches. Data last updated 13 August 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 London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Wed 16/9

13:10-22:18

1 stop14h 08m

Allentown-Bethlehem

Wed 30/9

09:13-06:50

1 stop16h 37m

£700

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Tue 22/9

06:30-22:16

2 stops20h 46m

Allentown-Bethlehem

Tue 29/9

06:25-06:20

2 stops18h 55m

£703

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Wed 16/9

06:30-22:16

2 stops20h 46m

Allentown-Bethlehem

Wed 30/9

06:25-06:45

2 stops19h 20m

£703

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Tue 22/9

13:25-22:16

1 stop13h 51m

Allentown-Bethlehem

Tue 29/9

18:08-13:15

1 stop14h 07m

£716
Fastest return journey

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Mon 7/9

09:15-16:27

1 stop12h 12m

Allentown-Bethlehem

Mon 14/9

17:10-11:15

1 stop13h 05m

£722

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Wed 23/9

06:50-16:56

2 stops15h 06m

Allentown-Bethlehem

Wed 30/9

17:43-11:55

1 stop13h 12m

£740

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Mon 7/9

09:15-16:27

1 stop12h 12m

Allentown-Bethlehem

Mon 14/9

14:25-21:40

2 stops26h 15m

£740

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Wed 27/1

09:00-10:06

2 stops30h 06m

Allentown-Bethlehem

Sun 31/1

17:36-11:15

2 stops36h 39m

£741

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Mon 7/9

06:55-09:39

2 stops31h 44m

Allentown-Bethlehem

Mon 14/9

17:36-20:40

2 stops22h 04m

£752

LondonAllentown

LHR London Heathrow - ABE Allentown-Bethlehem

LHRABE

London Heathrow

Fri 25/9

18:35-12:15

2 stops22h 40m

Allentown-Bethlehem

Fri 2/10

18:04-20:10

2 stops21h 06m

£778

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Allentown from

How to get the cheapest flight ticket from London to Allentown

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from London to Allentown-Bethlehem?

American Airlines and Delta are the most popular carriers operating from London to Allentown-Bethlehem

Which airlines fly to Allentown?

British Airways, Lufthansa and United Airlines are the top three most popular airlines that fly to Allentown from London according to our data. British Airways is the first choice among our users, with 45% of people opting to fly with this airline when travelling to Allentown. Keep in mind that there are 15 different airlines that fly to Allentown on a routine basis, so you have a few additional options to choose from.

When to book flights from London to Allentown

Are you open to changing your travel dates? Check out the ideal times to fly from London to Allentown according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London to Allentown (LON to ABE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Allentown

Fastest flight time

14h 08m

Direct flights

None
The fastest flight from London to Allentown takes 14h 08m
There are no direct flights from London to Allentown. There are no popular flight routes from London to Allentown.
Search flight deals

Frequently asked questions about flying from London to Allentown

  • How far is London to Allentown-Bethlehem by plane?

    Allentown-Bethlehem is 3523.4 mi away from London. Flights usually cover this in 14h 08m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from London to Allentown-Bethlehem Airport?

    Prices for flights from London to Allentown-Bethlehem Airport refresh daily.

  • How old do you have to be to fly from London to Allentown-Bethlehem Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Allentown-Bethlehem Airport.

  • What documentation or ID do you need to fly to Allentown-Bethlehem Airport?

    The travel and health documents you'll need for your trip to Allentown-Bethlehem Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Allentown-Bethlehem Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from London to Allentown?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Allentown from London.

Can I find flights from London to Allentown with flexible booking policies on momondo?

Yes. All flights to Allentown from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from London to Allentown?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Allentown from London.

I’m not ready to book a flight from London to Allentown right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to Allentown now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Allentown and let you know when they change.

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