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

According to our current data, Delta ($602), KLM ($659), and United Airlines ($1,013) offers the cheapest pricing from Allentown to London. Delta is 47% 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 are the most popular airlines that fly from Allentown to London?

American Airlines, Delta and United Airlines are the most popular airlines when flying from Allentown to London.

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 $1,155 per person but you can even find prices for as low as $419. The most expensive prices can be found in the month of January. Opting for a February flight can save you 130% 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Allentown-London flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 3 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.

$602+ Flights from Allentown to London - Compare & Save Big

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Cheap flight deals from Allentown to London

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$602 (Delta)
Popular in	January
Cheapest in	February
Average price	$1,793

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

Highest demand for flights based on searches. 25% potential increase in price ($400 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 14% potential price decrease ($151 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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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 April 25, 2025.

Wed 9/31:00 pmABE - LHR

1 stop19h 30mDelta

Thu 9/116:30 amLHR - ABE

2 stops15h 44mDelta

Deal found 4/25

$602

Wed 9/101:00 pmABE - LHR

1 stop12h 45mKLM

Mon 9/151:05 pmLHR - ABE

1 stop15h 18mKLM

Deal found 4/24

$659

Mon 9/1512:54 pmABE - LGW

3 stops44h 46mMultiple Airlines

Sat 9/202:00 pmLGW - ABE

2 stops25h 26mMultiple Airlines

Deal found 4/24

$934

Fri 4/255:32 pmABE - LHR

1 stop13h 13mUnited Airlines

Fri 5/26:50 amLHR - ABE

2 stops15h 07mUnited Airlines

Deal found 4/24

$978

Wed 5/215:27 pmABE - LHR

1 stop10h 38mAmerican Airlines

Sat 5/313:00 pmLHR - ABE

1 stop14h 40mAmerican Airlines

Deal found 4/25

$1,340

Mon 4/2812:36 pmABE - LHR

3 stops40h 24mMultiple Airlines

Fri 5/910:05 pmLHR - ABE

2 stops26h 44mMultiple Airlines

Deal found 4/24

$1,584

Mon 9/155:40 pmABE - LCY

2 stops18h 00mDelta

Sat 9/2010:00 amLCY - ABE

2 stops18h 23mDelta

Deal found 4/24

$1,605

Mon 4/2812:36 pmABE - LCY

3 stops42h 54mMultiple Airlines

Mon 5/59:55 amLCY - ABE

2 stops27h 30mMultiple Airlines

Deal found 4/25

$2,985

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 April 25, 2025.

Wed 9/31:00 pmABE - LHR

1 stop19h 30mDelta

Thu 9/116:30 amLHR - ABE

2 stops15h 44mDelta

Deal found 4/25

$602

Wed 9/101:00 pmABE - LHR

1 stop12h 45mKLM

Mon 9/151:05 pmLHR - ABE

1 stop15h 18mKLM

Deal found 4/24

$659

Mon 9/1512:54 pmABE - LGW

3 stops44h 46mMultiple Airlines

Sat 9/202:00 pmLGW - ABE

2 stops25h 26mMultiple Airlines

Deal found 4/24

$934

Wed 5/75:32 pmABE - LHR

1 stop13h 13mUnited Airlines

Wed 5/146:50 amLHR - ABE

2 stops15h 07mUnited Airlines

Deal found 4/23

$1,013

Wed 5/215:27 pmABE - LHR

1 stop10h 38mAmerican Airlines

Sat 5/313:00 pmLHR - ABE

1 stop14h 40mAmerican Airlines

Deal found 4/25

$1,340

Mon 9/155:40 pmABE - LCY

2 stops18h 00mDelta

Sat 9/2010:00 amLCY - ABE

2 stops18h 23mDelta

Deal found 4/24

$1,605

Wed 5/76:37 amABE - LHR

2 stops18h 53mMultiple Airlines

Wed 5/149:30 amLHR - ABE

2 stops17h 15mMultiple Airlines

Deal found 4/23

$2,039

Sun 6/86:30 amABE - LCY

2 stops20h 40mMultiple Airlines

Sun 6/155:50 pmLCY - ABE

2 stops28h 09mMultiple Airlines

Deal found 4/24

$8,402

Last-minute flights from Allentown to London
Discover last-minute flight deals from Allentown to London. Data last updated April 25, 2025 and is based on user searches.

Fri 4/255:32 pmABE - LHR

1 stop13h 13mUnited Airlines

Fri 5/26:50 amLHR - ABE

2 stops15h 07mUnited Airlines

Deal found 4/24

$978

Fri 4/251:07 pmABE - LCY

2 stops15h 23mDelta

Fri 5/210:00 amLCY - ABE

2 stops17h 18mDelta

Deal found 4/24

$1,724

Mon 4/285:21 pmABE - LHR

1 stop12h 49mKLM

Fri 5/96:30 amLHR - ABE

2 stops15h 36mKLM

Deal found 4/24

$925

Mon 4/281:07 pmABE - LHR

2 stops16h 38mDelta

Fri 5/96:30 amLHR - ABE

2 stops21h 25mDelta

Deal found 4/24

$949

Mon 4/287:30 amABE - LGW

1 stop21h 30mMultiple Airlines

Fri 5/92:00 pmLGW - ABE

1 stop34h 49mMultiple Airlines

Deal found 4/24

$989

Mon 4/2812:36 pmABE - LHR

3 stops40h 24mMultiple Airlines

Fri 5/910:05 pmLHR - ABE

2 stops26h 44mMultiple Airlines

Deal found 4/24

$1,584

Mon 4/2812:36 pmABE - LCY

3 stops42h 54mMultiple Airlines

Mon 5/59:55 amLCY - ABE

2 stops27h 30mMultiple Airlines

Deal found 4/25

$2,985

Wed 5/215:27 pmABE - LHR

1 stop10h 38mAmerican Airlines

Sat 5/313:00 pmLHR - ABE

1 stop14h 40mAmerican Airlines

Deal found 4/25

$1,340

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 April 25, 2025.

Mon 7/211:00 pmABE - LCY

2 stops15h 30mDelta

Deal found 4/24

$623

Thu 6/1912:58 pmABE - LHR

2 stops14h 57mDelta

Deal found 4/25

$699

Fri 5/236:30 amABE - LHR

2 stops22h 30mUnited Airlines

Deal found 4/24

$898

Tue 7/151:00 pmABE - LGW

2 stops16h 00mDelta

Deal found 4/24

$14,281

Cheapflights Fare Finder

Use the filters below to find and compare flights from Allentown to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 9/3

1:00 pm-1:30 pm

1 stop19h 30m

London Heathrow

Thu 9/11

6:30 am-5:14 pm

2 stops15h 44m

$602

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 9/10

1:00 pm-6:45 am

1 stop12h 45m

London Heathrow

Mon 9/15

1:05 pm-11:23 pm

1 stop15h 18m

$659

AllentownLondon

ABE - LGW

ABELGW

Allentown-Bethlehem

Mon 9/15

12:54 pm-2:40 pm

3 stops44h 46m

London Gatwick

Sat 9/20

2:00 pm-10:26 am

2 stops25h 26m

$934

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 5/7

5:32 pm-11:45 am

1 stop13h 13m

London Heathrow

Wed 5/14

6:50 am-4:57 pm

2 stops15h 07m

$1,013

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 5/21

5:27 pm-9:05 am

1 stop10h 38m

London Heathrow

Sat 5/31

3:00 pm-12:40 am

1 stop14h 40m

$1,340

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

Mon 9/15

5:40 pm-4:40 pm

2 stops18h 00m

London City

Sat 9/20

10:00 am-11:23 pm

2 stops18h 23m

$1,605

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Wed 5/7

6:37 am-6:30 am

2 stops18h 53m

London Heathrow

Wed 5/14

9:30 am-9:45 pm

2 stops17h 15m

$2,039

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

Sun 6/8

6:30 am-8:10 am

2 stops20h 40m

London City

Sun 6/15

5:50 pm-4:59 pm

2 stops28h 09m

$8,402

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

Mon 7/21

1:00 pm-9:30 am

2 stops15h 30m

$623

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 6/19

12:58 pm-8:55 am

2 stops14h 57m

$699

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/24

Showing 1-10 of 12 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 April.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Allentown-London flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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.

Cheapflights Insights

Everything you need to know about your flight from Allentown to London

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 $1,110). 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

Delta

8.0

Very good

7,920 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

7,920 reviews

Delta

8.0

Very good

7,920 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

1,333 reviews

Delta

8.0

Very good

7,920 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

8,685 reviews

Delta

8.0

Very good

7,920 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

7,920 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 3 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, Delta ($602), KLM ($659), and United Airlines ($1,013) offers the cheapest pricing from Allentown to London. Delta is 47% 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 $1,110). 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

Hayes

Hounslow

Thornton Heath

Luton

Horley

Canterbury

Harrow

Wembley

Dover

Gatwick

Orpington

Watford

Croydon

Borehamwood

Folkestone

Ilford

Aylesbury

Chelmsford

Sutton

Brentwood

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Allentown to London

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$575	Average$808	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$597	Average$777	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$639	Average$782	FlexibilityNo cancel fee	On-time71%

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$602+ Cheap flights from Allentown (ABE) to London (LON)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/3. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Allentown to London with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Allentown to London

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

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 April 25, 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 April 25, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Allentown to London that are best for you.

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 April.

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.

Cheapflights Insights

Everything you need to know about your flight from Allentown to London

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 April 25, 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

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?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Allentown to London

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Top 3 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 April 25, 2025.