Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London Heathrow Airport to Allentown from £526

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 Heathrow Airport to Allentown departing on 6/6. 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
0 bags
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from London Heathrow Airport to Allentown

Cheap return flights

Enter your travel dates to find the best prices.
Delta Logo
06:30 - 22:18
LHR
-
ABE
20h 48m
2 stops
Delta Logo
06:23 - 07:10
ABE
-
LHR
19h 47m
2 stops
£772Delta
Sat, 23 May - Sat, 30 May
Delta Logo
09:20 - 22:18
LHR
-
ABE
17h 58m
1 stop
Delta Logo
06:23 - 07:10
ABE
-
LHR
19h 47m
2 stops
£786Delta
Sat, 23 May - Sat, 30 May
Multiple Airlines Logo
15:15 - 23:16
LHR
-
ABE
13h 01m
1 stop
Multiple Airlines Logo
17:06 - 11:15
ABE
-
LHR
13h 09m
1 stop
£818Multiple Airlines
Mon, 25 May - Mon, 1 Jun
Delta Logo
12:25 - 12:19
LHR
-
ABE
28h 54m
2 stops
Delta Logo
12:59 - 10:20
ABE
-
LHR
16h 21m
2 stops
£828Delta
Mon, 25 May - Mon, 1 Jun
United Airlines Logo
08:00 - 17:01
LHR
-
ABE
14h 01m
1 stop
United Airlines Logo
10:38 - 06:45
ABE
-
LHR
15h 07m
1 stop
£913United Airlines
Wed, 27 May - Wed, 3 Jun
United Airlines Logo
08:45 - 13:48
LHR
-
ABE
34h 03m
2 stops
United Airlines Logo
06:15 - 05:55
ABE
-
LHR
18h 40m
2 stops
£941United Airlines
Tue, 26 May - Tue, 2 Jun
Multiple Airlines Logo
15:15 - 23:15
LHR
-
ABE
13h 00m
1 stop
Multiple Airlines Logo
17:18 - 11:15
ABE
-
LHR
12h 57m
1 stop
£947Multiple Airlines
Thu, 30 Jul - Sun, 2 Aug
United Airlines Logo
08:00 - 17:01
LHR
-
ABE
14h 01m
1 stop
United Airlines Logo
06:15 - 06:45
ABE
-
LHR
19h 30m
1 stop
£959United Airlines
Sat, 23 May - Sat, 30 May
United Airlines Logo
06:50 - 17:01
LHR
-
ABE
15h 11m
2 stops
United Airlines Logo
10:38 - 06:45
ABE
-
LHR
15h 07m
1 stop
£1,000United Airlines
Wed, 27 May - Wed, 3 Jun
United Airlines Logo
06:50 - 17:01
LHR
-
ABE
15h 11m
2 stops
United Airlines Logo
14:23 - 09:00
ABE
-
LHR
13h 37m
1 stop
£1,012United Airlines
Tue, 26 May - Tue, 2 Jun

Delta flights from London Heathrow Airport to Allentown

Our best Delta deals on London Heathrow Airport to Allentown flight tickets
Delta
23 May
LHR06:30London Heathrow
20h 48m
2 stops
ABE22:18Allentown-Bethlehem
30 May
ABE06:23Allentown-Bethlehem
19h 47m
2 stops
LHR07:10London Heathrow
£772
Delta
23 May
LHR09:20London Heathrow
17h 58m
1 stop
ABE22:18Allentown-Bethlehem
30 May
ABE06:23Allentown-Bethlehem
19h 47m
2 stops
LHR07:10London Heathrow
£786
Delta
25 May
LHR12:25London Heathrow
28h 54m
2 stops
ABE12:19Allentown-Bethlehem
1 Jun
ABE12:59Allentown-Bethlehem
16h 21m
2 stops
LHR10:20London Heathrow
£828

United Airlines flights from London Heathrow Airport to Allentown

Our best United Airlines deals on London Heathrow Airport to Allentown flight tickets
United Airlines
27 May
LHR08:00London Heathrow
14h 01m
1 stop
ABE17:01Allentown-Bethlehem
3 Jun
ABE10:38Allentown-Bethlehem
15h 07m
1 stop
LHR06:45London Heathrow
£913
United Airlines
26 May
LHR08:45London Heathrow
34h 03m
2 stops
ABE13:48Allentown-Bethlehem
2 Jun
ABE06:15Allentown-Bethlehem
18h 40m
2 stops
LHR05:55London Heathrow
£941
United Airlines
23 May
LHR08:00London Heathrow
14h 01m
1 stop
ABE17:01Allentown-Bethlehem
30 May
ABE06:15Allentown-Bethlehem
19h 30m
1 stop
LHR06:45London Heathrow
£959

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Allentown that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 23/5

06:30-22:18

2 stops20h 48m

Allentown-Bethlehem

Sat 30/5

06:23-07:10

2 stops19h 47m

£772

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 23/5

09:20-22:18

1 stop17h 58m

Allentown-Bethlehem

Sat 30/5

06:23-07:10

2 stops19h 47m

£786

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 25/5

15:15-23:16

1 stop13h 01m

Allentown-Bethlehem

Mon 1/6

17:06-11:15

1 stop13h 09m

£818

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Mon 25/5

12:25-12:19

2 stops28h 54m

Allentown-Bethlehem

Mon 1/6

12:59-10:20

2 stops16h 21m

£828

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 27/5

08:00-17:01

1 stop14h 01m

Allentown-Bethlehem

Wed 3/6

10:38-06:45

1 stop15h 07m

£913

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 26/5

08:45-13:48

2 stops34h 03m

Allentown-Bethlehem

Tue 2/6

06:15-05:55

2 stops18h 40m

£941
Fastest return journey

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 30/7

15:15-23:15

1 stop13h 00m

Allentown-Bethlehem

Sun 2/8

17:18-11:15

1 stop12h 57m

£947

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 23/5

08:00-17:01

1 stop14h 01m

Allentown-Bethlehem

Sat 30/5

06:15-06:45

1 stop19h 30m

£959

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 27/5

06:50-17:01

2 stops15h 11m

Allentown-Bethlehem

Wed 3/6

10:38-06:45

1 stop15h 07m

£1,000

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 26/5

06:50-17:01

2 stops15h 11m

Allentown-Bethlehem

Tue 2/6

14:23-09:00

1 stop13h 37m

£1,012

Flights are sorted by cheapest return flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

See travel insights to Allentown from

How to get the cheapest flight ticket from London Heathrow Airport 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 Heathrow to Allentown-Bethlehem?

Delta and United Airlines are the most popular carriers operating from London Heathrow 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 Heathrow Airport 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 16 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 Heathrow Airport to Allentown

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

Cheap London Heathrow Airport to Allentown (LHR to ABE) flight deals and tips

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

Fastest flight time

13h 00m

Direct flights

None
The fastest flight from London Heathrow Airport to Allentown takes 13h 00m
There are no direct flights from London Heathrow Airport to Allentown. There are no popular flight routes from London Heathrow Airport to Allentown.
Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Allentown

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

    A flight from London Heathrow to Allentown-Bethlehem will travel around 3510.6 mi. Flights usually cover this in 13h 00m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from London Heathrow Airport to Allentown-Bethlehem Airport are refreshed on a daily basis.

  • How old do you have to be to fly from London Heathrow Airport 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 Heathrow Airport 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?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Allentown for you.

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

Yes. momondo allows you to filter the results for London to Allentown flights to just show those with flexible booking policies.

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

Once all potential London to Allentown flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for London to Allentown flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Allentown trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 13/5
Wed 20/5
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States