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

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

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

As of January 2026, there is 1 operator available to choose from for flights from Allentown-Bethlehem Airport to London.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Allentown-Bethlehem Airport to London.

What documentation or ID do you need to fly to London?

The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$393 Cheap Flights from Allentown to London in 2026

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Cheap round-trip flights

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10:31 am - 5:55 am

ABE

LHR

15h 24m

1 stop

4:25 pm - 9:17 pm

LHR

ABE

33h 52m

2 stops

$641United Airlines

Tue, Mar 24 - Tue, Mar 31

10:31 am - 7:10 am

ABE

LHR

16h 39m

2 stops

4:25 pm - 9:17 pm

LHR

ABE

33h 52m

2 stops

$644United Airlines

Tue, Mar 24 - Tue, Mar 31

6:15 am - 6:45 am

ABE

LHR

19h 30m

1 stop

4:25 pm - 8:58 pm

LHR

ABE

33h 33m

2 stops

$656United Airlines

Sun, Apr 26 - Mon, May 11

5:58 pm - 6:45 am

ABE

LHR

31h 47m

1 stop

8:55 am - 10:59 pm

LHR

ABE

19h 04m

2 stops

$657Delta

Sat, Apr 11 - Wed, Apr 22

10:31 am - 7:55 am

ABE

LHR

17h 24m

1 stop

8:00 am - 5:03 pm

LHR

ABE

14h 03m

1 stop

$659United Airlines

Tue, Mar 24 - Tue, Mar 31

4:57 pm - 11:15 am

ABE

LHR

13h 18m

1 stop

6:50 am - 9:05 pm

LHR

ABE

19h 15m

2 stops

$679United Airlines

Fri, Feb 6 - Tue, Feb 10

5:23 pm - 11:15 am

ABE

LHR

12h 52m

1 stop

9:00 am - 8:53 pm

LHR

ABE

16h 53m

2 stops

$680United Airlines

Fri, Feb 13 - Wed, Feb 18

1:02 pm - 7:20 am

ABE

LHR

13h 18m

1 stop

11:45 am - 10:26 pm

LHR

ABE

15h 41m

1 stop

$709American Airlines

Thu, Feb 5 - Sun, Feb 8

12:47 pm - 9:30 am

ABE

LCY

15h 43m

2 stops

7:45 am - 10:49 pm

LCY

ABE

20h 04m

2 stops

$1,466Delta

Tue, Feb 24 - Fri, Feb 27

12:47 pm - 8:10 am

ABE

LCY

14h 23m

2 stops

7:45 am - 10:56 pm

LCY

ABE

19h 11m

2 stops

$2,129Delta

Fri, Mar 6 - Fri, Mar 13

United Airlines flights from Allentown to London

Our best United Airlines deals on Allentown to London flight tickets

United Airlines

Apr 26

ABE6:15 amAllentown-Bethlehem

19h 30m

1 stop

LHR6:45 amLondon Heathrow

May 11

LHR4:25 pmLondon Heathrow

33h 33m

2 stops

ABE8:58 pmAllentown-Bethlehem

$656

United Airlines

Feb 6

ABE4:57 pmAllentown-Bethlehem

13h 18m

1 stop

LHR11:15 amLondon Heathrow

Feb 10

LHR6:50 amLondon Heathrow

19h 15m

2 stops

ABE9:05 pmAllentown-Bethlehem

$679

United Airlines

Feb 13

ABE5:23 pmAllentown-Bethlehem

12h 52m

1 stop

LHR11:15 amLondon Heathrow

Feb 18

LHR9:00 amLondon Heathrow

16h 53m

2 stops

ABE8:53 pmAllentown-Bethlehem

$680

Delta flights from Allentown to London

Our best Delta deals on Allentown to London flight tickets

Delta

Apr 11

ABE5:58 pmAllentown-Bethlehem

31h 47m

1 stop

LHR6:45 amLondon Heathrow

Apr 22

LHR8:55 amLondon Heathrow

19h 04m

2 stops

ABE10:59 pmAllentown-Bethlehem

$657

Delta

Apr 26

ABE5:59 pmAllentown-Bethlehem

14h 16m

1 stop

LHR1:15 pmLondon Heathrow

May 11

LHR9:20 amLondon Heathrow

18h 36m

1 stop

ABE10:56 pmAllentown-Bethlehem

$724

Delta

Apr 11

ABE5:58 pmAllentown-Bethlehem

32h 17m

2 stops

LHR7:15 amLondon Heathrow

Apr 23

LHR8:55 amLondon Heathrow

19h 04m

2 stops

ABE10:59 pmAllentown-Bethlehem

$743

Fly from

Fly to

Route

Depart

Return

Price

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 3/24

10:31 am-5:55 am

1 stop15h 24m

London Heathrow

Tue 3/31

4:25 pm-9:17 pm

2 stops33h 52m

$641

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 3/24

10:31 am-7:10 am

2 stops16h 39m

London Heathrow

Tue 3/31

4:25 pm-9:17 pm

2 stops33h 52m

$644

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 4/26

6:15 am-6:45 am

1 stop19h 30m

London Heathrow

Mon 5/11

4:25 pm-8:58 pm

2 stops33h 33m

$656

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sat 4/11

5:58 pm-6:45 am

1 stop31h 47m

London Heathrow

Wed 4/22

8:55 am-10:59 pm

2 stops19h 04m

$657

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 3/24

10:31 am-7:55 am

1 stop17h 24m

London Heathrow

Tue 3/31

8:00 am-5:03 pm

1 stop14h 03m

$659

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 2/6

4:57 pm-11:15 am

1 stop13h 18m

London Heathrow

Tue 2/10

6:50 am-9:05 pm

2 stops19h 15m

$679

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 2/13

5:23 pm-11:15 am

1 stop12h 52m

London Heathrow

Wed 2/18

9:00 am-8:53 pm

2 stops16h 53m

$680

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 2/5

1:02 pm-7:20 am

1 stop13h 18m

London Heathrow

Sun 2/8

11:45 am-10:26 pm

1 stop15h 41m

$709

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

Tue 2/24

12:47 pm-9:30 am

2 stops15h 43m

London City

Fri 2/27

7:45 am-10:49 pm

2 stops20h 04m

$1,466

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

Fri 3/6

12:47 pm-8:10 am

2 stops14h 23m

London City

Fri 3/13

7:45 am-10:56 pm

2 stops19h 11m

$2,129

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first

How to get the cheapest flight ticket from Allentown to London

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?

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

What airlines fly to London?

United Airlines, British Airways and American Airlines are the top three most popular airlines that fly to London from Allentown according to our data. United Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to London. Keep in mind that there are 18 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

When to book flights from Allentown to London

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

Estimated round-trip price

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

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

Fastest flight time	12h 45m
Direct flights	None

The fastest flight from Allentown to London takes 12h 45m

There are no direct flights from Allentown to London. There are no popular flight routes from Allentown to London.

Search flight deals

How far is Allentown-Bethlehem to London by plane?
There are 3523.4 mi between Allentown-Bethlehem and London. In terms of flight time, this usually takes a little over 12h 45m.
When did momondo last update prices for flights from Allentown-Bethlehem Airport to London?
Prices for flights from Allentown-Bethlehem Airport to London are refreshed on a daily basis.
How many operators does momondo search for flights from Allentown-Bethlehem Airport to London?
As of January 2026, there is 1 operator available to choose from for flights from Allentown-Bethlehem Airport to London.
How old do you have to be to fly from Allentown-Bethlehem Airport to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Allentown-Bethlehem Airport to London.
What documentation or ID do you need to fly to London?
The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Allentown to London

Compare and see reviews for airlines that fly from Allentown to London with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $690	Free Cancellation	Rating 7.4 9,190 reviews		Search United Airlines flights

Gatwick

Hounslow

Luton

Milton Keynes

Dover

Slough

Guildford

Wembley

Crawley

Dartford

Hayes

Brentwood

Watford

Cobham

Folkestone

Romford

Stansted

Harrow

Croydon

Richmond

Why use momondo?

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

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 Allentown to London for you.

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

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

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

momondo helps you find the best flight between Allentown and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to London from Allentown. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London trip

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Find better results for your trip to the United Kingdom

Cheap flights from Allentown to London from $393

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 2/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

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Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Allentown to London

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United Airlines flights from Allentown to London

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Delta flights from Allentown to London

Our best Delta deals on Allentown to London flight tickets

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How to get the cheapest flight ticket from Allentown to London

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

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

What airlines fly to London?

When to book flights from Allentown to London

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

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

Fastest flight time

Direct flights

How far is Allentown-Bethlehem to London by plane?

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

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

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

What documentation or ID do you need to fly to London?

Best airlines flying from Allentown to London

Compare and see reviews for airlines that fly from Allentown to London with momondo

Traveling to a place near London?

Why use momondo?

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

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

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

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

An easier way to manage your London trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London