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$469+ 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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — LON
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap flight deals from Allentown to London

Discover tips and strategies to find the most affordable flight options for your journey from Allentown (ABE) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 30, 2025.

Round-trip from

$524
(Delta)

One-way from

$469
(American Airlines)

Popular in

January

Cheapest in

February

Average price

$1,064
From Allentown-Bethlehem to London (LON)
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One-way flight from Allentown-Bethlehem to London (LON)
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Highest demand for flights based on searches. 36% potential increase in price ($563 potential increase over avg. RT price).
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Cheapest flight prices on average. 22% potential price decrease ($186 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1412:48 pmABE - LHR
1 stop12h 57mDelta
Tue 9/236:30 amLHR - ABE
2 stops16h 01mDelta
Deal found 7/30$524
This KLM deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/186:14 pmABE - LHR
1 stop14h 16mKLM
Thu 8/286:30 amLHR - ABE
2 stops16h 04mKLM
Deal found 7/28$525
This Trip.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/186:30 amABE - LGW
1 stop22h 30mMultiple Airlines
Thu 8/282:00 pmLGW - ABE
1 stop26h 45mMultiple Airlines
Deal found 7/28$621
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/141:00 pmABE - LHR
1 stop12h 20mUnited Airlines
Tue 9/232:05 pmLHR - ABE
2 stops26h 53mUnited Airlines
Deal found 7/30$627
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/121:00 pmABE - LHR
1 stop12h 20mMultiple Airlines
Fri 9/196:50 amLHR - ABE
2 stops15h 03mMultiple Airlines
Deal found 7/29$855
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/131:00 pmABE - LCY
3 stops19h 45mMultiple Airlines
Sat 9/209:20 amLCY - ABE
3 stops41h 34mMultiple Airlines
Deal found 7/30$980
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1712:56 pmABE - LCY
2 stops15h 34mDelta
Sat 8/2310:00 amLCY - ABE
2 stops17h 27mDelta
Deal found 7/29$2,081

Cheapflights Fare Finder

 
Customize your flight search to find flights from Allentown to London 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, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2025.
Use the filters below to find and compare flights from Allentown to London that are best for you.

Fly from

Allentown

Fly to

London

Route

Depart

Return

Price

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 9/14

12:48 pm-6:45 am

1 stop12h 57m

London Heathrow

Wed 9/24

6:30 am-5:31 pm

2 stops16h 01m

$524

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Mon 8/18

6:14 pm-1:30 pm

1 stop14h 16m

London Heathrow

Thu 8/28

6:30 am-5:34 pm

2 stops16h 04m

$525

AllentownLondon

ABE - LGW

ABELGW

Allentown-Bethlehem

Mon 8/18

6:30 am-10:00 am

1 stop22h 30m

London Gatwick

Thu 8/28

2:00 pm-11:45 am

1 stop26h 45m

$621

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 9/14

1:00 pm-6:20 am

1 stop12h 20m

London Heathrow

Tue 9/23

2:05 pm-11:58 am

2 stops26h 53m

$627

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 9/12

1:00 pm-6:20 am

1 stop12h 20m

London Heathrow

Fri 9/19

6:50 am-4:53 pm

2 stops15h 03m

$855

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

Sat 9/13

1:00 pm-1:45 pm

3 stops19h 45m

London City

Sat 9/20

9:20 am-9:54 pm

3 stops41h 34m

$980

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

Sun 8/17

12:56 pm-9:30 am

2 stops15h 34m

London City

Sat 8/23

10:00 am-10:27 pm

2 stops17h 27m

$2,081

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 10/3

2:37 pm-7:40 am

1 stop12h 03m

$469

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 10/3

1:00 pm-8:35 am

2 stops38h 35m

$482

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Mon 8/11

6:14 pm-11:10 am

1 stop11h 56m

$543

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 12 results
1
2

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 $1,097). 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?

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 July 30, 2025.

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.

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 July 30, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and United Airlines from Allentown to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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?

    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 ($524), KLM ($525), and United Airlines ($627) 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 cheapest airlines to fly from Allentown to London one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $469. Users have also found prices from $482 and $543 on United Airlines and Delta, 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 $1,097). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Harrow
Canterbury
Dover
Orpington
Watford
Gatwick
Borehamwood
Dartford
Aylesbury
Chelmsford
Folkestone
Southend-on-Sea
Chichester
Arundel
Milton Keynes
Bishop's Stortford
Eastbourne

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Top 3 airlines flying from Allentown to London

Discover the top 3 airlines that operate flights from Allentown to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$575Average$753FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$588Average$780FlexibilityNo cancel feeOn-time71%
DeltaCheapest$597Average$777FlexibilityNo cancel feeOn-timeN/A

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