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Cheap flights from London Heathrow Airport to Allentown from £403

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 19/1. 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

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Find the cheapest flights from London Heathrow Airport to Allentown

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
07:25 - 16:47LHR-ABE
14h 22m1 stop
United Airlines Logo
13:00 - 05:55ABE-LHR
11h 55m1 stop
£727United Airlines
Find Deal
Tue, 2 Dec - Tue, 9 Dec
United Airlines Logo
06:35 - 21:15LHR-ABE
19h 40m2 stops
United Airlines Logo
16:57 - 11:15ABE-LHR
13h 18m1 stop
£745United Airlines
Find Deal
Thu, 8 Jan - Thu, 22 Jan
United Airlines Logo
07:40 - 16:22LHR-ABE
13h 42m1 stop
United Airlines Logo
11:30 - 05:55ABE-LHR
13h 25m1 stop
£760United Airlines
Find Deal
Thu, 8 Jan - Thu, 22 Jan
American Airlines Logo
12:55 - 00:14LHR-ABE
15h 19m2 stops
American Airlines Logo
13:48 - 07:45ABE-LHR
12h 57m2 stops
£814American Airlines
Find Deal
Fri, 27 Mar - Tue, 31 Mar
American Airlines Logo
11:20 - 00:14LHR-ABE
16h 54m2 stops
American Airlines Logo
13:48 - 07:45ABE-LHR
12h 57m2 stops
£818American Airlines
Find Deal
Fri, 27 Mar - Tue, 31 Mar
American Airlines Logo
14:45 - 00:14LHR-ABE
13h 29m1 stop
American Airlines Logo
13:48 - 06:55ABE-LHR
12h 07m1 stop
£818American Airlines
Find Deal
Fri, 27 Mar - Tue, 31 Mar
Virgin Atlantic Logo
08:55 - 17:14LHR-ABE
13h 19m1 stop
Virgin Atlantic Logo
12:49 - 11:40ABE-LHR
17h 51m1 stop
£898Virgin Atlantic
Find Deal
Fri, 19 Dec - Fri, 26 Dec
Multiple Airlines Logo
10:45 - 22:11LHR-ABE
16h 26m1 stop
Multiple Airlines Logo
18:04 - 07:05ABE-LHR
32h 01m2 stops
£978Multiple Airlines
Find Deal
Fri, 19 Dec - Fri, 26 Dec
Multiple Airlines Logo
06:30 - 22:46LHR-ABE
45h 16m2 stops
Multiple Airlines Logo
18:04 - 07:05ABE-LHR
32h 01m2 stops
£1,063Multiple Airlines
Find Deal
Fri, 19 Dec - Fri, 26 Dec
Delta Logo
08:55 - 17:14LHR-ABE
13h 19m1 stop
Delta Logo
17:58 - 11:40ABE-LHR
12h 42m1 stop
£1,727Delta
Find Deal
Sat, 13 Dec - Fri, 9 Jan

United Airlines flights from London Heathrow Airport to Allentown

Our best United Airlines deals on London Heathrow Airport to Allentown flight tickets
United Airlines
2 Dec
LHR07:25London Heathrow
14h 22m
1 stop
ABE16:47Allentown-Bethlehem
9 Dec
ABE13:00Allentown-Bethlehem
11h 55m
1 stop
LHR05:55London Heathrow
£727
Find similar
United Airlines
8 Jan
LHR06:35London Heathrow
19h 40m
2 stops
ABE21:15Allentown-Bethlehem
22 Jan
ABE16:57Allentown-Bethlehem
13h 18m
1 stop
LHR11:15London Heathrow
£745
Find similar
United Airlines
8 Jan
LHR07:40London Heathrow
13h 42m
1 stop
ABE16:22Allentown-Bethlehem
22 Jan
ABE11:30Allentown-Bethlehem
13h 25m
1 stop
LHR05:55London Heathrow
£760
Find similar

American Airlines flights from London Heathrow Airport to Allentown

Our best American Airlines deals on London Heathrow Airport to Allentown flight tickets
American Airlines
27 Mar
LHR12:55London Heathrow
15h 19m
2 stops
ABE00:14Allentown-Bethlehem
31 Mar
ABE13:48Allentown-Bethlehem
12h 57m
2 stops
LHR07:45London Heathrow
£814
Find similar
American Airlines
27 Mar
LHR11:20London Heathrow
16h 54m
2 stops
ABE00:14Allentown-Bethlehem
31 Mar
ABE13:48Allentown-Bethlehem
12h 57m
2 stops
LHR07:45London Heathrow
£818
Find similar
American Airlines
27 Mar
LHR14:45London Heathrow
13h 29m
1 stop
ABE00:14Allentown-Bethlehem
31 Mar
ABE13:48Allentown-Bethlehem
12h 07m
1 stop
LHR06:55London Heathrow
£818
Find similar

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 5 November 2025.
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

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Tue 2/12

07:25-16:47

1 stop14h 22m

Allentown-Bethlehem

Tue 9/12

13:00-05:55

1 stop11h 55m

£727

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 8/1

06:35-21:15

2 stops19h 40m

Allentown-Bethlehem

Thu 22/1

16:57-11:15

1 stop13h 18m

£745

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Thu 8/1

07:40-16:22

1 stop13h 42m

Allentown-Bethlehem

Thu 22/1

11:30-05:55

1 stop13h 25m

£760

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 27/3

12:55-00:14

2 stops15h 19m

Allentown-Bethlehem

Tue 31/3

13:48-07:45

2 stops12h 57m

£814

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 27/3

11:20-00:14

2 stops16h 54m

Allentown-Bethlehem

Tue 31/3

13:48-07:45

2 stops12h 57m

£818

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 27/3

14:45-00:14

1 stop13h 29m

Allentown-Bethlehem

Tue 31/3

13:48-06:55

1 stop12h 07m

£818

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 19/12

08:55-17:14

1 stop13h 19m

Allentown-Bethlehem

Fri 26/12

12:49-11:40

1 stop17h 51m

£898

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 19/12

10:45-22:11

1 stop16h 26m

Allentown-Bethlehem

Fri 26/12

18:04-07:05

2 stops32h 01m

£978

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Fri 19/12

06:30-22:46

2 stops45h 16m

Allentown-Bethlehem

Fri 26/12

18:04-07:05

2 stops32h 01m

£1,063

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 13/12

08:55-17:14

1 stop13h 19m

Allentown-Bethlehem

Fri 9/1

17:58-11:40

1 stop12h 42m

£1,727

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 day to depart on your flight to Allentown?

The cheapest day to depart from London Heathrow Airport to Allentown is on a Monday when prices can be found for as low as £480. Flights from London Heathrow Airport to Allentown on a Sunday will generally be more expensive and average around £858. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Allentown?

Flying to Allentown from London Heathrow Airport at midday is the least expensive time of day to depart. momondo users have found prices as low as £584 when looking at flights departing at midday. Flights in the morning are often more expensive, with an average ticket price of £626.

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

Direct flights

None
There are no direct flights from London Heathrow Airport to Allentown. There are no popular flight routes from London Heathrow Airport to Allentown.
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  • 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 12m, 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 many operators does momondo search for flights from London Heathrow Airport to Allentown-Bethlehem Airport?

  • 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.

  • What is the most popular airline from London Heathrow Airport to Allentown?

Best airlines flying from London Heathrow Airport to Allentown

Compare and see reviews for airlines that fly from London Heathrow Airport to Allentown with momondo
Airline
Rating
Free Cancellation
Price
FinnairPriceFrom £544Free CancellationRating
7.6
1,335 reviews
Search Finnair flights

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.

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