What are the cheapest airlines flying from Allentown to London round-trip?

According to our current data, KLM ($592), Delta ($599), and United Airlines ($661) offers the cheapest pricing from Allentown to London. KLM is 51% cheaper than the average price of flights available within the next 90 days to this destination.

What is the cheapest day to fly from Allentown to London?

Travelers seeking maximum savings on their Allentown to London flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular routes from Allentown to London?

The most popular flight routes from Allentown to London are Allentown-Bethlehem - London Heathrow, Allentown-Bethlehem - London City and Allentown-Bethlehem - London Gatwick.

What is the cheapest day to fly round-trip from Allentown to London?

Wednesday is generally a great day to depart. Flying on this day could help you save up to 94%.

What is the cheapest month to fly from Allentown to London?

February is one of the best times of the year to fly to London from Allentown. Prices for February average $1,219 per person but you can even find prices for as low as $427. The most expensive prices can be found in the month of January. Opting for a February flight can save you 118% on your journey compared to booking in January

Most accurate provider : When it comes to deals on Allentown-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Allentown-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Allentown-London flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Allentown-London flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Allentown-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from Allentown to London?

Most people fly from Allentown-Bethlehem (ABE) if they book a flight from Allentown to London. On average, Allentown-Bethlehem has 0 outbound flights to London per day from 2 airlines. Allentown-Bethlehem is conveniently located just 3.9 mi from Allentown’s city center.

Can I find deals for flights from Allentown to London that include hotel bookings?

Yes. In addition to deals on Allentown to London flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Allentown to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Allentown to London.

Can I find deals for business class flights from Allentown to London?

Yes. Cheapflights offers flight deals from Allentown to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$459+ Save on Flights from Allentown to London

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Cheap flight deals from Allentown to London

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$592 (KLM)
One-way from	$459 (United Airlines)
Popular in	January
Cheapest in	February

Provider with most accurate pricing for Allentown-Bethlehem-London (LON) flight deals.

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Provider most trusted by Cheapflights users for Allentown-Bethlehem-London (LON) flights.

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From Allentown-Bethlehem to London (LON)

Search Deals

One-way flight from Allentown-Bethlehem to London (LON)

Search Deals

Highest demand for flights based on searches. 22% potential increase in price ($362 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 15% potential price decrease ($161 potential savings vs. average RT price).

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Find flight deals from Allentown to London

Cheapest flights from Allentown to London
Explore the most affordable flight options available from Allentown to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 4, 2025.

Wed 4/25:17 pmABE - LHR

1 stop15h 13mKLM

Thu 4/109:55 amLHR - ABE

2 stops17h 23mKLM

Deal found 3/3

$592

Mon 3/245:17 pmABE - LHR

1 stop13h 18mDelta

Thu 4/31:05 pmLHR - ABE

1 stop14h 13mDelta

Deal found 3/3

$599

Tue 3/185:38 pmABE - LHR

1 stop13h 37mUnited Airlines

Tue 3/257:30 amLHR - ABE

2 stops18h 04mUnited Airlines

Deal found 3/4

$661

Tue 3/185:38 pmABE - LHR

2 stops14h 12mMultiple Airlines

Tue 3/256:00 pmLHR - ABE

2 stops26h 59mMultiple Airlines

Deal found 3/4

$665

Mon 3/318:00 amABE - LGW

1 stop21h 00mMultiple Airlines

Thu 4/102:00 pmLGW - ABE

1 stop29h 13mMultiple Airlines

Deal found 3/3

$679

Thu 4/35:16 pmABE - LHR

1 stop14h 29mAmerican Airlines

Thu 4/103:00 pmLHR - ABE

1 stop12h 18mAmerican Airlines

Deal found 3/3

$743

Sat 11/11:00 pmABE - LCY

2 stops20h 15mDelta

Sat 11/810:00 amLCY - ABE

2 stops18h 27mDelta

Deal found 3/4

$1,165

Best flights from Allentown to London
Discover carefully curated flight deals from Allentown to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 4, 2025.

Wed 4/25:17 pmABE - LHR

1 stop15h 13mKLM

Thu 4/109:55 amLHR - ABE

2 stops17h 23mKLM

Deal found 3/3

$592

Mon 3/245:17 pmABE - LHR

1 stop13h 18mDelta

Thu 4/31:05 pmLHR - ABE

1 stop14h 13mDelta

Deal found 3/3

$599

Tue 3/185:38 pmABE - LHR

1 stop13h 37mUnited Airlines

Tue 3/257:30 amLHR - ABE

2 stops18h 04mUnited Airlines

Deal found 3/4

$661

Tue 3/185:38 pmABE - LHR

2 stops14h 12mMultiple Airlines

Tue 3/256:00 pmLHR - ABE

2 stops26h 59mMultiple Airlines

Deal found 3/4

$665

Thu 4/35:16 pmABE - LHR

1 stop14h 29mAmerican Airlines

Thu 4/103:00 pmLHR - ABE

1 stop12h 18mAmerican Airlines

Deal found 3/3

$743

Mon 3/318:00 amABE - LGW

1 stop21h 00mMultiple Airlines

Thu 4/102:00 pmLGW - ABE

1 stop29h 13mMultiple Airlines

Deal found 3/3

$679

Thu 4/36:05 amABE - LCY

2 stops20h 10mDelta

Thu 4/108:40 amLCY - ABE

2 stops18h 38mDelta

Deal found 3/3

$1,204

Last-minute flights from Allentown to London
Discover last-minute flight deals from Allentown to London. Data last updated March 4, 2025 and is based on user searches.

Thu 3/135:17 pmABE - LHR

1 stop14h 23mKLM

Sat 4/121:05 pmLHR - ABE

1 stop14h 13mKLM

Deal found 3/3

$1,598

Thu 3/137:30 amABE - LHR

2 stops19h 40mMultiple Airlines

Sat 4/126:00 amLHR - ABE

3 stops37h 24mMultiple Airlines

Deal found 3/3

$1,734

Tue 3/185:38 pmABE - LHR

1 stop13h 37mUnited Airlines

Tue 3/257:30 amLHR - ABE

2 stops18h 04mUnited Airlines

Deal found 3/4

$661

Tue 3/185:38 pmABE - LHR

2 stops14h 12mMultiple Airlines

Tue 3/256:00 pmLHR - ABE

2 stops26h 59mMultiple Airlines

Deal found 3/4

$665

Mon 3/245:17 pmABE - LHR

1 stop13h 18mDelta

Thu 4/31:05 pmLHR - ABE

1 stop14h 13mDelta

Deal found 3/3

$599

Mon 3/318:00 amABE - LGW

1 stop21h 00mMultiple Airlines

Thu 4/102:00 pmLGW - ABE

1 stop29h 13mMultiple Airlines

Deal found 3/3

$679

Wed 4/25:17 pmABE - LHR

1 stop15h 13mKLM

Thu 4/109:55 amLHR - ABE

2 stops17h 23mKLM

Deal found 3/3

$592

Thu 4/35:16 pmABE - LHR

1 stop14h 29mAmerican Airlines

Thu 4/103:00 pmLHR - ABE

1 stop12h 18mAmerican Airlines

Deal found 3/3

$743

Thu 4/36:05 amABE - LCY

2 stops20h 10mDelta

Thu 4/108:40 amLCY - ABE

2 stops18h 38mDelta

Deal found 3/3

$1,204

One-way flights from Allentown to London
Search for one-way flight options from Allentown to London. Find affordable one-way fares based on user searches. Data last updated March 4, 2025.

Wed 3/266:30 amABE - LHR

2 stops19h 50mUnited Airlines

Deal found 3/3

$459

Wed 3/261:06 pmABE - LCY

2 stops14h 09mDelta

Deal found 3/3

$589

Wed 5/285:50 pmABE - LHR

1 stop12h 20mDelta

Deal found 3/4

$933

Wed 5/281:12 pmABE - LGW

2 stops15h 48mDelta

Deal found 3/4

$14,547

Find flights from Allentown to London within your budget

Fly from

Fly to

Route

Depart

Return

Price

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 4/2

5:17 pm-1:30 pm

1 stop15h 13m

London Heathrow

Thu 4/10

9:55 am-10:18 pm

2 stops17h 23m

$592

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Mon 3/24

5:17 pm-10:35 am

1 stop13h 18m

London Heathrow

Thu 4/3

1:05 pm-10:18 pm

1 stop14h 13m

$599

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 3/18

5:38 pm-11:15 am

1 stop13h 37m

London Heathrow

Tue 3/25

7:30 am-9:34 pm

2 stops18h 04m

$661

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Tue 3/18

5:38 pm-11:50 am

2 stops14h 12m

London Heathrow

Tue 3/25

6:00 pm-4:59 pm

2 stops26h 59m

$665

AllentownLondon

ABE - LGW

ABELGW

Allentown-Bethlehem

Mon 3/31

8:00 am-10:00 am

1 stop21h 00m

London Gatwick

Thu 4/10

2:00 pm-2:13 pm

1 stop29h 13m

$679

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 4/3

5:16 pm-12:45 pm

1 stop14h 29m

London Heathrow

Thu 4/10

3:00 pm-10:18 pm

1 stop12h 18m

$743

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

Thu 4/3

6:05 am-7:15 am

2 stops20h 10m

London City

Thu 4/10

8:40 am-10:18 pm

2 stops18h 38m

$1,204

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 3/26

6:30 am-6:20 am

2 stops19h 50m

$459

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

Wed 3/26

1:06 pm-7:15 am

2 stops14h 09m

$589

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 5/28

5:50 pm-11:10 am

1 stop12h 20m

$933

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

Showing 1-10 of 11 results

Compare providers for flights from Allentown to London

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Allentown to London in March.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Allentown-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Allentown-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Allentown-London flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Allentown-London flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Allentown-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Allentown to London

Have a flexible travel schedule? Discover the best time to fly to London from Allentown with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Allentown to London

Get recent, data-driven insights about flights from Allentown to London including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Allentown to London?

Currently, November is the cheapest month in which you can book a flight from Allentown to London (average of $661). Flying from Allentown to London in June is currently the most expensive (average of $1,128). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ABE to LON?

When flying from Allentown to London, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 30% versus a flight in the afternoon.

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing London

Peruse reviews from past customers who have flown with Delta, KLM and United Airlines from Allentown to London to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

8,061 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

8,061 reviews

Delta

8.0

Very good

8,061 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very good

8,061 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,678 reviews

Delta

8.0

Very good

8,061 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

8,061 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly from for flights from Allentown to London?
Most people fly from Allentown-Bethlehem (ABE) if they book a flight from Allentown to London. On average, Allentown-Bethlehem has 0 outbound flights to London per day from 2 airlines. Allentown-Bethlehem is conveniently located just 3.9 mi from Allentown’s city center.
What are the cheapest airlines flying from Allentown to London round-trip?
According to our current data, KLM ($592), Delta ($599), and United Airlines ($661) offers the cheapest pricing from Allentown to London. KLM is 51% cheaper than the average price of flights available within the next 90 days to this destination.
What are the most popular routes from Allentown to London?
The most popular flight routes from Allentown to London are Allentown-Bethlehem - London Heathrow, Allentown-Bethlehem - London City and Allentown-Bethlehem - London Gatwick.
Can I find deals for flights from Allentown to London that include hotel bookings?
Yes. In addition to deals on Allentown to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Allentown to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Allentown to London.
Can I find deals for business class flights from Allentown to London?
Yes. Cheapflights offers flight deals from Allentown to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Allentown to London?
Currently, November is the cheapest month in which you can book a flight from Allentown to London (average of $661). Flying from Allentown to London in June is currently the most expensive (average of $1,128). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Hayes

Thornton Heath

Luton

Wembley

Harrow

Horley

Canterbury

Gatwick

Milton Keynes

Dover

Orpington

Watford

Croydon

Borehamwood

Bromley

Folkestone

Ilford

Aylesbury

Chelmsford

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Top 2 airlines flying from Allentown to London

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$575	Average$808	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$639	Average$832	FlexibilityNo cancel fee	On-time71%

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$459+ Cheap flights from Allentown (ABE) to London (LON)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/26. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Allentown to London

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Find flight deals from Allentown to London

Cheapest flights from Allentown to LondonExplore the most affordable flight options available from Allentown to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 4, 2025.

Explore the most affordable flight options available from Allentown to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 4, 2025.

Find flights from Allentown to London within your budget

Compare providers for flights from Allentown to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Allentown to London in March.

Best time to book a flight from Allentown to London

Have a flexible travel schedule? Discover the best time to fly to London from Allentown with our price prediction graph.

Travel insights for flights from Allentown to London

Get recent, data-driven insights about flights from Allentown to London including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Allentown to London?

What is the cheapest time of day to fly from ABE to LON?

Find hourly flight availability from Allentown to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 4, 2025.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated March 4, 2025.

Peruse reviews from past customers who have flown with Delta, KLM and United Airlines from Allentown to London to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Allentown to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Allentown to London?

What are the cheapest airlines flying from Allentown to London round-trip?

What are the most popular routes from Allentown to London?

Can I find deals for flights from Allentown to London that include hotel bookings?

How can I find direct flights from Allentown to London?

Can I find deals for business class flights from Allentown to London?

What is the cheapest month to book a flight from Allentown to London?

Traveling to a place near Allentown?

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Alternative routes for Allentown to London

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Top 2 airlines flying from Allentown to London

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Cheapest flights from Allentown to London
Explore the most affordable flight options available from Allentown to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 4, 2025.