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

According to our current data, Delta ($581), KLM ($594), and United Airlines ($776) offers the cheapest pricing from Allentown to London. Delta is 52% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from Allentown to London one-way?

For one-way options, check prices for Delta. According to our data, you can fly for as low as $488. Users have also found prices from $4,744 and $5,443 on American Airlines and United Airlines, respectively.

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.

$488+ 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	$581 (Delta)
One-way from	$488 (Delta)
Popular in	January
Cheapest in	February
Average price	$2,659

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).

Search Deals

Average for round-trip flights in January 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 enero 30, 2025.

mié. 3/51:18 pmABE - LHR

1 stop12h 02mDelta

mié. 3/126:30 amLHR - ABE

2 stops19h 59mDelta

Deal found 1/30

$581

mié. 3/51:18 pmABE - LHR

1 stop13h 37mKLM

mié. 3/1212:30 pmLHR - ABE

1 stop13h 59mKLM

Deal found 1/30

$594

mié. 3/56:15 amABE - LCY

2 stops20h 00mDelta

mié. 3/129:20 amLCY - ABE

2 stops17h 09mDelta

Deal found 1/30

$633

vie. 4/185:32 pmABE - LHR

1 stop13h 13mUnited Airlines

dom. 4/2711:05 amLHR - ABE

1 stop15h 20mUnited Airlines

Deal found 1/30

$776

jue. 6/1912:12 pmABE - LHR

1 stop15h 53mAmerican Airlines

jue. 7/249:15 amLHR - ABE

1 stop13h 45mAmerican Airlines

Deal found 1/29

$1,461

mié. 3/52:51 pmABE - LHR

2 stops16h 54mMultiple Airlines

mié. 3/128:40 pmLHR - ABE

3 stops30h 01mMultiple Airlines

Deal found 1/30

$1,486

vie. 2/75:05 pmABE - LHR

1 stop10h 20mLufthansa

vie. 3/76:30 amLHR - ABE

2 stops19h 55mLufthansa

Deal found 1/30

$1,514

vie. 2/71:18 pmABE - LHR

1 stop17h 22mVirgin Atlantic

vie. 3/712:30 pmLHR - ABE

1 stop15h 09mVirgin Atlantic

Deal found 1/30

$1,515

vie. 2/78:00 amABE - LGW

1 stop18h 30mMultiple Airlines

vie. 3/711:55 amLGW - ABE

2 stops30h 27mMultiple Airlines

Deal found 1/30

$1,581

jue. 6/196:44 amABE - LCY

2 stops20h 26mMultiple Airlines

jue. 7/247:10 pmLCY - ABE

2 stops30h 33mMultiple Airlines

Deal found 1/29

$2,412

jue. 1/306:53 pmABE - LHR

1 stop12h 07mBritish Airways

vie. 1/317:00 pmLHR - ABE

2 stops28h 23mBritish Airways

Deal found 1/30

$2,484

jue. 6/196:30 amABE - LCY

2 stops20h 40mKLM

jue. 7/248:10 pmLCY - ABE

2 stops26h 09mKLM

Deal found 1/29

$3,288

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 enero 30, 2025.

mié. 3/51:18 pmABE - LHR

1 stop12h 02mDelta

mié. 3/126:30 amLHR - ABE

2 stops19h 59mDelta

Deal found 1/30

$581

mié. 3/51:18 pmABE - LHR

1 stop13h 37mKLM

mié. 3/1212:30 pmLHR - ABE

1 stop13h 59mKLM

Deal found 1/30

$594

vie. 4/185:32 pmABE - LHR

1 stop13h 13mUnited Airlines

dom. 4/2711:05 amLHR - ABE

1 stop15h 20mUnited Airlines

Deal found 1/30

$776

mié. 3/56:15 amABE - LCY

2 stops20h 00mDelta

mié. 3/129:20 amLCY - ABE

2 stops17h 09mDelta

Deal found 1/30

$633

jue. 6/1912:12 pmABE - LHR

1 stop15h 53mAmerican Airlines

jue. 7/249:15 amLHR - ABE

1 stop13h 45mAmerican Airlines

Deal found 1/29

$1,461

mié. 3/52:51 pmABE - LHR

2 stops16h 54mMultiple Airlines

mié. 3/128:40 pmLHR - ABE

3 stops30h 01mMultiple Airlines

Deal found 1/30

$1,486

jue. 6/196:44 amABE - LCY

2 stops20h 26mMultiple Airlines

jue. 7/247:10 pmLCY - ABE

2 stops30h 33mMultiple Airlines

Deal found 1/29

$2,412

jue. 6/196:30 amABE - LCY

2 stops20h 40mKLM

jue. 7/248:10 pmLCY - ABE

2 stops26h 09mKLM

Deal found 1/29

$3,288

Last-minute flights from Allentown to London
Discover last-minute flight deals from Allentown to London. Data last updated enero 30, 2025 and is based on user searches.

jue. 1/306:53 pmABE - LHR

1 stop12h 07mBritish Airways

vie. 1/317:00 pmLHR - ABE

2 stops28h 23mBritish Airways

Deal found 1/30

$2,484

jue. 1/301:18 pmABE - LHR

1 stop13h 37mKLM

vie. 1/3112:30 pmLHR - ABE

1 stop15h 09mKLM

Deal found 1/30

$5,209

vie. 2/75:05 pmABE - LHR

1 stop10h 20mLufthansa

vie. 3/76:30 amLHR - ABE

2 stops19h 55mLufthansa

Deal found 1/30

$1,514

vie. 2/71:18 pmABE - LHR

1 stop17h 22mVirgin Atlantic

vie. 3/712:30 pmLHR - ABE

1 stop15h 09mVirgin Atlantic

Deal found 1/30

$1,515

vie. 2/78:00 amABE - LGW

1 stop18h 30mMultiple Airlines

vie. 3/711:55 amLGW - ABE

2 stops30h 27mMultiple Airlines

Deal found 1/30

$1,581

vie. 2/78:00 amABE - LHR

2 stops21h 50mMultiple Airlines

vie. 3/75:10 pmLHR - ABE

3 stops33h 24mMultiple Airlines

Deal found 1/30

$3,813

vie. 2/281:18 pmABE - LHR

1 stop12h 02mDelta

vie. 3/76:30 amLHR - ABE

2 stops21h 09mDelta

Deal found 1/30

$631

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 enero 30, 2025.

lun. 4/281:00 pmABE - LHR

1 stop12h 25mDelta

Deal found 1/29

$488

dom. 3/165:16 pmABE - LHR

1 stop14h 44mAmerican Airlines

Deal found 1/30

$4,744

dom. 3/166:30 amABE - LHR

2 stops20h 40mUnited Airlines

Deal found 1/30

$5,443

dom. 3/161:06 pmABE - LCY

2 stops15h 04mDelta

Deal found 1/30

$5,485

Find flights from Allentown to London within your budget

Fly from

Fly to

Route

Depart

Return

Price

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

mié. 3/5

1:18 pm-6:20 am

1 stop12h 02m

London Heathrow

mié. 3/12

6:30 am-10:29 pm

2 stops19h 59m

$581

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

mié. 3/5

1:18 pm-7:55 am

1 stop13h 37m

London Heathrow

mié. 3/12

12:30 pm-10:29 pm

1 stop13h 59m

$594

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

mié. 3/5

6:15 am-7:15 am

2 stops20h 00m

London City

mié. 3/12

9:20 am-10:29 pm

2 stops17h 09m

$633

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

vie. 4/18

5:32 pm-11:45 am

1 stop13h 13m

London Heathrow

dom. 4/27

11:05 am-9:25 pm

1 stop15h 20m

$776

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

jue. 6/19

12:12 pm-9:05 am

1 stop15h 53m

London Heathrow

jue. 7/24

9:15 am-6:00 pm

1 stop13h 45m

$1,461

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

mié. 3/5

2:51 pm-12:45 pm

2 stops16h 54m

London Heathrow

mié. 3/12

8:40 pm-10:41 pm

3 stops30h 01m

$1,486

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

jue. 6/19

6:44 am-8:10 am

2 stops20h 26m

London City

jue. 7/24

7:10 pm-8:43 pm

2 stops30h 33m

$2,412

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

jue. 6/19

6:30 am-8:10 am

2 stops20h 40m

London City

jue. 7/24

8:10 pm-5:19 pm

2 stops26h 09m

$3,288

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

lun. 4/28

1:00 pm-6:25 am

1 stop12h 25m

$488

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

dom. 3/16

5:16 pm-12:00 pm

1 stop14h 44m

$4,744

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

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 January.

Provider	Price Accuracy	Trust Score*
FlightHub	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 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 $1,138). 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

8,454 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

8,454 reviews

Delta

8.0

Very good

8,454 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

1,335 reviews

Delta

8.0

Very good

8,454 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

8,913 reviews

Delta

8.0

Very good

8,454 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

8,454 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, Delta ($581), KLM ($594), and United Airlines ($776) offers the cheapest pricing from Allentown to London. Delta is 52% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Allentown to London one-way?
For one-way options, check prices for Delta. According to our data, you can fly for as low as $488. Users have also found prices from $4,744 and $5,443 on American Airlines and United Airlines, respectively.
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 $1,138). 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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Hounslow

Thornton Heath

Harrow

Luton

Wembley

Canterbury

Gatwick

Horley

Milton Keynes

Dover

Orpington

Watford

Croydon

Borehamwood

Bromley

Folkestone

Ilford

Aylesbury

Chelmsford

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Allentown to London

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$575	Average$799	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$639	Average$842	FlexibilityNo cancel fee	On-time71%

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$488+ 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 4/28. 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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Most trusted provider

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Popular in

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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 enero 30, 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 enero 30, 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 January.

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 enero 30, 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

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 cheapest airlines to fly from Allentown to London one-way?

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

See prices for flight routes from nearby airports that may be better suited for you.

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 enero 30, 2025.