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Cheap flights from Allentown to London from $468

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Allentown to London departing on 11/24. 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 Allentown to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
5:58 pm - 11:40 amABE-LHR
12h 42m1 stop
Delta Logo
8:55 am - 5:18 pmLHR-ABE
13h 23m1 stop
$605Delta
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Wed, Feb 11 - Fri, Feb 20
Delta Logo
5:58 pm - 6:25 amABE-LHR
31h 27m1 stop
Delta Logo
8:55 am - 5:18 pmLHR-ABE
13h 23m1 stop
$610Delta
Find Deal
Sat, Feb 14 - Tue, Feb 24
United Airlines Logo
6:15 am - 5:55 amABE-LHR
18h 40m1 stop
United Airlines Logo
6:35 am - 9:01 pmLHR-ABE
19h 26m2 stops
$625United Airlines
Find Deal
Wed, Feb 11 - Wed, Feb 18
United Airlines Logo
6:15 am - 5:55 amABE-LHR
18h 40m1 stop
United Airlines Logo
11:10 am - 11:50 amLHR-ABE
29h 40m2 stops
$626United Airlines
Find Deal
Wed, Feb 11 - Fri, Feb 20
Delta Logo
12:47 pm - 7:50 amABE-LHR
14h 03m1 stop
Delta Logo
6:30 am - 5:18 pmLHR-ABE
15h 48m2 stops
$627Delta
Find Deal
Thu, Feb 12 - Tue, Feb 24
Delta Logo
5:58 pm - 11:40 amABE-LHR
12h 42m1 stop
Delta Logo
8:55 am - 5:18 pmLHR-ABE
13h 23m1 stop
$630Delta
Find Deal
Wed, Feb 11 - Sun, Feb 22
Virgin Atlantic Logo
1:00 pm - 9:00 amABE-LHR
16h 00m1 stop
Virgin Atlantic Logo
6:30 am - 10:52 pmLHR-ABE
21h 22m2 stops
$808Virgin Atlantic
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Fri, Mar 27 - Tue, Mar 31
Multiple Airlines Logo
12:47 pm - 7:50 amABE-LHR
14h 03m1 stop
Multiple Airlines Logo
6:30 am - 5:18 pmLHR-ABE
15h 48m2 stops
$892Multiple Airlines
Find Deal
Fri, Feb 13 - Fri, Feb 20
Multiple Airlines Logo
12:47 pm - 7:50 amABE-LHR
14h 03m1 stop
Multiple Airlines Logo
6:30 am - 5:18 pmLHR-ABE
15h 48m2 stops
$942Multiple Airlines
Find Deal
Fri, Feb 13 - Sat, Feb 21
American Airlines Logo
5:47 pm - 12:00 pmABE-LHR
14h 13m1 stop
American Airlines Logo
11:45 am - 12:14 amLHR-ABE
16h 29m1 stop
$982American Airlines
Find Deal
Sat, Mar 14 - Sat, Mar 21

Delta flights from Allentown to London Heathrow Airport

Our best Delta deals on Allentown to London Heathrow Airport flight tickets
Delta
Feb 11
ABE5:58 pmAllentown-Bethlehem
12h 42m
1 stop
LHR11:40 amLondon Heathrow
Feb 20
LHR8:55 amLondon Heathrow
13h 23m
1 stop
ABE5:18 pmAllentown-Bethlehem
$605
Find similar
Delta
Feb 14
ABE5:58 pmAllentown-Bethlehem
31h 27m
1 stop
LHR6:25 amLondon Heathrow
Feb 24
LHR8:55 amLondon Heathrow
13h 23m
1 stop
ABE5:18 pmAllentown-Bethlehem
$610
Find similar
Delta
Feb 12
ABE12:47 pmAllentown-Bethlehem
14h 03m
1 stop
LHR7:50 amLondon Heathrow
Feb 24
LHR6:30 amLondon Heathrow
15h 48m
2 stops
ABE5:18 pmAllentown-Bethlehem
$627
Find similar

United Airlines flights from Allentown to London Heathrow Airport

Our best United Airlines deals on Allentown to London Heathrow Airport flight tickets
United Airlines
Feb 11
ABE6:15 amAllentown-Bethlehem
18h 40m
1 stop
LHR5:55 amLondon Heathrow
Feb 18
LHR6:35 amLondon Heathrow
19h 26m
2 stops
ABE9:01 pmAllentown-Bethlehem
$625
Find similar
United Airlines
Feb 11
ABE6:15 amAllentown-Bethlehem
18h 40m
1 stop
LHR5:55 amLondon Heathrow
Feb 20
LHR11:10 amLondon Heathrow
29h 40m
2 stops
ABE11:50 amAllentown-Bethlehem
$626
Find similar
United Airlines
Feb 14
ABE5:23 pmAllentown-Bethlehem
33h 32m
1 stop
LHR7:55 amLondon Heathrow
Feb 21
LHR11:05 amLondon Heathrow
34h 43m
2 stops
ABE4:48 pmAllentown-Bethlehem
$695
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Allentown to London Heathrow Airport 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 832,500 searches. Data last updated November 4, 2025.
Use the filters below to find and compare flights from Allentown to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 2/11

5:58 pm-11:40 am

1 stop12h 42m

London Heathrow

Fri 2/20

8:55 am-5:18 pm

1 stop13h 23m

$605

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sat 2/14

5:58 pm-6:25 am

1 stop31h 27m

London Heathrow

Tue 2/24

8:55 am-5:18 pm

1 stop13h 23m

$610

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 2/11

6:15 am-5:55 am

1 stop18h 40m

London Heathrow

Wed 2/18

6:35 am-9:01 pm

2 stops19h 26m

$625

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 2/11

6:15 am-5:55 am

1 stop18h 40m

London Heathrow

Fri 2/20

11:10 am-11:50 am

2 stops29h 40m

$626

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 2/12

12:47 pm-7:50 am

1 stop14h 03m

London Heathrow

Tue 2/24

6:30 am-5:18 pm

2 stops15h 48m

$627

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 2/11

5:58 pm-11:40 am

1 stop12h 42m

London Heathrow

Sun 2/22

8:55 am-5:18 pm

1 stop13h 23m

$630

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 3/27

1:00 pm-9:00 am

1 stop16h 00m

London Heathrow

Tue 3/31

6:30 am-10:52 pm

2 stops21h 22m

$808

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 2/13

12:47 pm-7:50 am

1 stop14h 03m

London Heathrow

Fri 2/20

6:30 am-5:18 pm

2 stops15h 48m

$892

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 2/13

12:47 pm-7:50 am

1 stop14h 03m

London Heathrow

Sat 2/21

6:30 am-5:18 pm

2 stops15h 48m

$942

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sat 3/14

5:47 pm-12:00 pm

1 stop14h 13m

London Heathrow

Sat 3/21

11:45 am-12:14 am

1 stop16h 29m

$982

Flights are sorted by cheapest round-trip flights first.

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

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

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 London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $691. The most expensive day to fly to London Heathrow Airport is Tuesday, with ticket prices averaging around $1,033.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at noon. momondo users have found flights departing from Allentown to London Heathrow Airport at noon for as low as $755. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $1,008.

When to book flights from Allentown to London Heathrow Airport

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

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

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

Direct flights

None
There are no direct flights from Allentown to London Heathrow Airport. There are no popular flight routes from Allentown to London Heathrow Airport.
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  • How far is Allentown-Bethlehem to London Heathrow by plane?

    The distance between Allentown-Bethlehem and London Heathrow is about 3510.6 mi. In terms of flight time, this usually takes a little over 11h 20m.

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

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

  • How many operators does momondo search for flights from Allentown-Bethlehem Airport to London Heathrow Airport?

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

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Allentown to London Heathrow Airport

Compare and see reviews for airlines that fly from Allentown to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $581Free CancellationRating
7.9
8,003 reviews
Search Delta flights
United AirlinesPriceFrom $690Free CancellationRating
7.4
9,002 reviews
Search United Airlines flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Crawley
Stratford-upon-Avon
Brentwood
Salisbury
Chelmsford
Folkestone
Romford
Ilford
Swindon
Cobham
Wembley

Why use momondo?

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

Finding the right flight to London from Allentown is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

All flight searches from Allentown to London on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Allentown to London 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 Allentown to London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Allentown to London 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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