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$578+ 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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — LON
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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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 October 29, 2025.

This KLM deal was found by Cheapflights users on 10/27. 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.
Thu 12/1112:54 pmABE - LHR
1 stop15h 06mKLM
Thu 12/1812:30 pmLHR - ABE
1 stop14h 41mKLM
Deal found 10/27$649
This Delta deal was found by Cheapflights users on 10/27. 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.
Thu 12/116:25 amABE - LHR
2 stops21h 20mDelta
Thu 12/181:00 pmLHR - ABE
2 stops28h 14mDelta
Deal found 10/27$654
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/91:00 pmABE - LHR
1 stop11h 55mUnited Airlines
Sun 11/166:50 amLHR - ABE
2 stops19h 26mUnited Airlines
Deal found 10/27$670
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Mon 11/101:00 pmABE - LHR
1 stop11h 55mUnited Airlines
Mon 11/179:00 amLHR - ABE
2 stops31h 48mUnited Airlines
Deal found 10/27$676
This KLM deal was found by Cheapflights users on 10/27. 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.
Fri 12/512:54 pmABE - LHR
1 stop13h 56mKLM
Sat 3/76:30 amLHR - ABE
2 stops15h 43mKLM
Deal found 10/27$693
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:30 amABE - LHR
2 stops19h 10mUnited Airlines
Fri 12/194:20 pmLHR - ABE
2 stops29h 10mUnited Airlines
Deal found 10/28$704
This United Airlines deal was found by Cheapflights users on 10/27. 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 12/56:30 amABE - LHR
2 stops19h 40mUnited Airlines
Sat 3/76:35 amLHR - ABE
2 stops20h 12mUnited Airlines
Deal found 10/27$719
This Delta deal was found by Cheapflights users on 10/26. 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.
Mon 11/36:00 pmABE - LHR
1 stop12h 40mDelta
Sun 11/98:55 amLHR - ABE
1 stop13h 24mDelta
Deal found 10/26$786
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 11/61:00 pmABE - LCY
2 stops23h 05mMultiple Airlines
Thu 11/137:10 pmLCY - ABE
2 stops31h 06mMultiple Airlines
Deal found 10/29$804
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Thu 12/111:00 pmABE - LHR
2 stops14h 25mUnited Airlines
Thu 12/187:40 amLHR - ABE
1 stop13h 50mUnited Airlines
Deal found 10/27$841
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/69:00 amABE - LGW
1 stop20h 00mMultiple Airlines
Thu 11/132:00 pmLGW - ABE
2 stops37h 49mMultiple Airlines
Deal found 10/29$929
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:30 amABE - LCY
3 stops24h 10mMultiple Airlines
Fri 12/199:55 amLCY - ABE
3 stops33h 00mMultiple Airlines
Deal found 10/28$1,326

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 October 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$649
(KLM)

One-way from

$578
(United Airlines)
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)
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One-way flight from Allentown-Bethlehem to London (LON)
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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 October 29, 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

Thu 12/11

6:25 am-8:45 am

2 stops21h 20m

London Heathrow

Thu 12/18

1:00 pm-12:14 pm

2 stops28h 14m

$654

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 12/11

1:00 pm-5:55 am

1 stop11h 55m

London Heathrow

Mon 12/15

1:45 pm-9:46 pm

2 stops37h 01m

$670

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 11/9

1:00 pm-5:55 am

1 stop11h 55m

London Heathrow

Sun 11/16

6:50 am-9:16 pm

2 stops19h 26m

$670

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Mon 11/10

1:00 pm-5:55 am

1 stop11h 55m

London Heathrow

Mon 11/17

9:00 am-11:48 am

2 stops31h 48m

$676

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sat 1/24

11:30 am-7:10 am

2 stops38h 40m

London Heathrow

Sun 2/1

6:50 am-9:15 pm

2 stops19h 25m

$678

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 12/5

12:54 pm-7:50 am

1 stop13h 56m

London Heathrow

Sat 3/7

6:30 am-5:13 pm

2 stops15h 43m

$693

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 12/11

5:22 pm-11:15 am

1 stop12h 53m

London Heathrow

Thu 12/18

1:35 pm-9:47 pm

1 stop13h 12m

$699

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 12/12

6:30 am-6:40 am

2 stops19h 10m

London Heathrow

Fri 12/19

4:20 pm-4:30 pm

2 stops29h 10m

$704

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 12/5

6:30 am-7:10 am

2 stops19h 40m

London Heathrow

Sat 3/7

6:35 am-9:47 pm

2 stops20h 12m

$719

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

Fri 3/13

6:44 am-11:40 am

3 stops24h 56m

London City

Fri 3/20

9:55 am-9:59 am

3 stops28h 04m

$914

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 26 results
1
2
3
  • 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.

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, January is the cheapest month in which you can book a flight from Allentown to London (average of $397). Flying from Allentown to London in June is currently the most expensive (average of $621). 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 October 29, 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 at noon, which can drop the price by up to 21% versus a flight in the evening.

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 2 airlines. Allentown-Bethlehem is conveniently located just 3.9 mi from Allentown’s city center.

  • How long is the flight from Allentown to London?

    Airlines like Delta and United Airlines fly from Allentown to London in about 11h 55m. The time it takes to get you to your destination can typically vary by up to 9h 25m. The distance from Allentown to London is about 3507 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, Delta ($581), and United Airlines ($690) offers the cheapest pricing from Allentown to London.

  • 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, January is the cheapest month in which you can book a flight from Allentown to London (average of $397). Flying from Allentown to London in June is currently the most expensive (average of $621). 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
Ilford
Hayes
Southend-on-Sea
Harrow
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Dartford
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Orpington
Gatwick
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Chipping Norton
Wembley
Folkestone
Eastbourne
Sutton

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Alternative routes for Allentown to London

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Top 2 airlines flying from Allentown to London

Discover the top 2 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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$581Average$724FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$690Average$817FlexibilityNo cancel feeOn-time69%

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