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Cheap flights from Allentown to London from $330

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 10/26. 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 Allentown to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:46 pm - 11:55 am
ABE
-
LHR
13h 09m
1 stop
United Airlines Logo
6:50 am - 9:05 pm
LHR
-
ABE
19h 15m
2 stops
$862United Airlines
Tue, Oct 13 - Tue, Oct 20
United Airlines Logo
5:46 pm - 11:55 am
ABE
-
LHR
13h 09m
1 stop
United Airlines Logo
8:00 am - 5:08 pm
LHR
-
ABE
14h 08m
1 stop
$891United Airlines
Tue, Oct 13 - Tue, Oct 20
United Airlines Logo
10:37 am - 8:30 am
ABE
-
LHR
16h 53m
1 stop
United Airlines Logo
7:25 am - 9:05 pm
LHR
-
ABE
18h 40m
2 stops
$892United Airlines
Wed, Sep 30 - Sat, Oct 10
United Airlines Logo
10:32 am - 6:45 am
ABE
-
LHR
15h 13m
1 stop
United Airlines Logo
6:50 am - 4:56 pm
LHR
-
ABE
15h 06m
2 stops
$922United Airlines
Tue, Aug 25 - Mon, Sep 7
United Airlines Logo
6:15 am - 9:00 am
ABE
-
LHR
21h 45m
1 stop
United Airlines Logo
12:10 pm - 9:00 pm
LHR
-
ABE
37h 50m
2 stops
$923United Airlines
Tue, Aug 4 - Tue, Aug 18
United Airlines Logo
10:32 am - 10:00 am
ABE
-
LHR
18h 28m
2 stops
United Airlines Logo
6:50 am - 5:00 pm
LHR
-
ABE
15h 10m
2 stops
$925United Airlines
Tue, Aug 11 - Tue, Aug 25
United Airlines Logo
10:32 am - 6:55 am
ABE
-
LHR
15h 23m
2 stops
United Airlines Logo
6:50 am - 4:56 pm
LHR
-
ABE
15h 06m
2 stops
$926United Airlines
Tue, Aug 25 - Mon, Sep 7
United Airlines Logo
6:15 am - 7:15 am
ABE
-
LHR
20h 00m
2 stops
United Airlines Logo
7:25 am - 9:00 pm
LHR
-
ABE
18h 35m
2 stops
$927United Airlines
Fri, Aug 21 - Sun, Aug 23
United Airlines Logo
10:35 am - 9:20 am
ABE
-
LHR
17h 45m
2 stops
United Airlines Logo
12:10 pm - 9:00 pm
LHR
-
ABE
37h 50m
2 stops
$928United Airlines
Tue, Aug 4 - Tue, Aug 18
United Airlines Logo
6:25 am - 5:55 am
ABE
-
LHR
18h 30m
1 stop
United Airlines Logo
6:00 pm - 4:56 pm
LHR
-
ABE
27h 56m
2 stops
$935United Airlines
Tue, Dec 1 - Wed, Dec 2

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United Airlines flights from Allentown to London Heathrow Airport

Our best United Airlines deals on Allentown to London Heathrow Airport flight tickets
United Airlines
Oct 13
ABE5:46 pmAllentown-Bethlehem
13h 09m
1 stop
LHR11:55 amLondon Heathrow
Oct 20
LHR6:50 amLondon Heathrow
19h 15m
2 stops
ABE9:05 pmAllentown-Bethlehem
$862
United Airlines
Oct 13
ABE5:46 pmAllentown-Bethlehem
13h 09m
1 stop
LHR11:55 amLondon Heathrow
Oct 20
LHR8:00 amLondon Heathrow
14h 08m
1 stop
ABE5:08 pmAllentown-Bethlehem
$891
United Airlines
Sep 30
ABE10:37 amAllentown-Bethlehem
16h 53m
1 stop
LHR8:30 amLondon Heathrow
Oct 10
LHR7:25 amLondon Heathrow
18h 40m
2 stops
ABE9:05 pmAllentown-Bethlehem
$892

Delta flights from Allentown to London Heathrow Airport

Our best Delta deals on Allentown to London Heathrow Airport flight tickets
Delta
Oct 8
ABE6:30 amAllentown-Bethlehem
18h 55m
1 stop
LHR6:25 amLondon Heathrow
Oct 17
LHR9:20 amLondon Heathrow
12h 55m
1 stop
ABE5:15 pmAllentown-Bethlehem
$985
Delta
Jul 4
ABE6:09 pmAllentown-Bethlehem
14h 06m
1 stop
LHR1:15 pmLondon Heathrow
Jul 18
LHR5:35 pmLondon Heathrow
28h 50m
2 stops
ABE5:25 pmAllentown-Bethlehem
$1,342
Delta
Jul 4
ABE7:00 amAllentown-Bethlehem
25h 05m
2 stops
LHR1:05 pmLondon Heathrow
Jul 18
LHR5:35 pmLondon Heathrow
28h 50m
2 stops
ABE5:25 pmAllentown-Bethlehem
$1,347

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 June 29, 2026.
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

Cheapest round-trip

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 10/13

5:46 pm-11:55 am

1 stop13h 09m

London Heathrow

Tue 10/20

6:50 am-9:05 pm

2 stops19h 15m

$862
Quickest round-trip

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 10/13

5:46 pm-11:55 am

1 stop13h 09m

London Heathrow

Tue 10/20

8:00 am-5:08 pm

1 stop14h 08m

$891

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 9/30

10:37 am-8:30 am

1 stop16h 53m

London Heathrow

Sat 10/10

7:25 am-9:05 pm

2 stops18h 40m

$892

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 8/25

10:32 am-6:45 am

1 stop15h 13m

London Heathrow

Mon 9/7

6:50 am-4:56 pm

2 stops15h 06m

$922

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 8/4

6:15 am-9:00 am

1 stop21h 45m

London Heathrow

Tue 8/18

12:10 pm-9:00 pm

2 stops37h 50m

$923

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 8/11

10:32 am-10:00 am

2 stops18h 28m

London Heathrow

Tue 8/25

6:50 am-5:00 pm

2 stops15h 10m

$925

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 8/25

10:32 am-6:55 am

2 stops15h 23m

London Heathrow

Mon 9/7

6:50 am-4:56 pm

2 stops15h 06m

$926

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 8/21

6:15 am-7:15 am

2 stops20h 00m

London Heathrow

Sun 8/23

7:25 am-9:00 pm

2 stops18h 35m

$927

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 8/4

10:35 am-9:20 am

2 stops17h 45m

London Heathrow

Tue 8/18

12:10 pm-9:00 pm

2 stops37h 50m

$928

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 12/1

6:25 am-5:55 am

1 stop18h 30m

London Heathrow

Wed 12/2

6:00 pm-4:56 pm

2 stops27h 56m

$935

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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 airline that flies from Allentown-Bethlehem to London Heathrow?

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

What airlines fly to London Heathrow Airport?

United Airlines, British Airways and American Airlines are the top three most popular airlines that fly to London Heathrow Airport from Allentown according to our data. United Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 17 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

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

Fastest flight time

13h 09m

Direct flights

None
The fastest flight from Allentown to London Heathrow Airport takes 13h 09m
There are no direct flights from Allentown to London Heathrow Airport. There are no popular flight routes from Allentown to London Heathrow Airport.
Search flight deals

Frequently asked questions about flying from Allentown to London Heathrow Airport

  • 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 13h 09m.

  • 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 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.

Traveling to a place near London?

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

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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