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$504+ 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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — LON
jun 17 — jun 241
ter 6/17
ter 6/24
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 junho 12, 2025.

Round-trip from

$740
(American Airlines)

One-way from

$504
(Delta)

Popular in

January

Cheapest in

February
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. 34% potential increase in price ($535 potential increase over avg. RT price).
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Cheapest flight prices on average. 21% potential price decrease ($183 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 junho 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 9/22:56 pmABE - LHR
1 stop11h 44mAmerican Airlines
sex 9/1211:00 amLHR - ABE
1 stop12h 30mAmerican Airlines
Deal found 6/12$740
This Trip.com deal was found by Cheapflights users on 6/10. 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.
sáb 10/45:28 pmABE - LHR
1 stop31h 52mUnited Airlines
ter 10/148:30 amLHR - ABE
1 stop13h 23mUnited Airlines
Deal found 6/10$750
This Delta deal was found by Cheapflights users on 6/11. 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.
qua 9/102:30 pmABE - LHR
1 stop11h 15mDelta
seg 9/1512:25 pmLHR - ABE
2 stops28h 43mDelta
Deal found 6/11$805
This Trip.com deal was found by Cheapflights users on 6/10. 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.
ter 7/88:00 amABE - LGW
1 stop21h 00mMultiple Airlines
ter 7/152:00 pmLGW - ABE
1 stop30h 11mMultiple Airlines
Deal found 6/10$807
This KLM deal was found by Cheapflights users on 6/12. 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.
ter 9/22:30 pmABE - LHR
1 stop18h 00mKLM
sex 9/126:30 amLHR - ABE
2 stops15h 44mKLM
Deal found 6/12$831
This Mytrip deal was found by Cheapflights users on 6/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 7/2612:46 pmABE - LHR
3 stops42h 09mMultiple Airlines
sáb 8/28:10 pmLHR - ABE
3 stops30h 50mMultiple Airlines
Deal found 6/11$1,199
This Delta deal was found by Cheapflights users on 6/10. 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.
ter 9/96:14 pmABE - LCY
2 stops17h 26mDelta
seg 9/158:40 amLCY - ABE
2 stops19h 43mDelta
Deal found 6/10$1,235
This United Airlines deal was found by Cheapflights users on 6/10. 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.
ter 7/86:30 amABE - LCY
2 stops20h 40mMultiple Airlines
ter 7/158:45 amLCY - ABE
2 stops18h 10mMultiple Airlines
Deal found 6/10$1,563
This WestJet deal was found by Cheapflights users on 6/11. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 12/41:00 pmABE - LHR
2 stops42h 50mWestJet
seg 12/82:50 pmLHR - ABE
2 stops31h 24mWestJet
Deal found 6/11$8,316

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 junho 12, 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

ter 9/2

2:56 pm-7:40 am

1 stop11h 44m

London Heathrow

sex 9/12

11:00 am-6:30 pm

1 stop12h 30m

$740

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

sáb 10/4

5:28 pm-6:20 am

1 stop31h 52m

London Heathrow

ter 10/14

8:30 am-4:53 pm

1 stop13h 23m

$750

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

qua 9/10

2:30 pm-6:45 am

1 stop11h 15m

London Heathrow

seg 9/15

12:25 pm-12:08 pm

2 stops28h 43m

$805

AllentownLondon

ABE - LGW

ABELGW

Allentown-Bethlehem

ter 7/8

8:00 am-10:00 am

1 stop21h 00m

London Gatwick

ter 7/15

2:00 pm-3:11 pm

1 stop30h 11m

$807

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

ter 9/2

2:30 pm-1:30 pm

1 stop18h 00m

London Heathrow

sex 9/12

6:30 am-5:14 pm

2 stops15h 44m

$831

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

sáb 7/26

12:46 pm-11:55 am

3 stops42h 09m

London Heathrow

sáb 8/2

8:10 pm-10:00 pm

3 stops30h 50m

$1,199

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

ter 9/9

6:14 pm-4:40 pm

2 stops17h 26m

London City

seg 9/15

8:40 am-11:23 pm

2 stops19h 43m

$1,235

AllentownLondon

ABE - LCY

ABELCY

Allentown-Bethlehem

ter 7/8

6:30 am-8:10 am

2 stops20h 40m

London City

ter 7/15

8:45 am-9:55 pm

2 stops18h 10m

$1,563

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

qui 12/4

1:00 pm-12:50 pm

2 stops42h 50m

London Heathrow

seg 12/8

2:50 pm-5:14 pm

2 stops31h 24m

$8,316

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

ter 7/8

12:55 pm-6:45 am

1 stop12h 50m

$504

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 13 results
1
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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 $1,108). 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 junho 12, 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.

Rainfall in London by month

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

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

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 junho 12, 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.
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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!
WestJet
7.2
Good
2,868 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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, American Airlines ($740), United Airlines ($750), and Delta ($805) offers the cheapest pricing from Allentown to London. American Airlines is 27% 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 $504. Users have also found prices from $513 and $518 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 Gatwick and Allentown-Bethlehem - London City.

  • 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 $1,108). 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 Allentown?

Book flights to Allentown if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Luton
Canterbury
Harrow
Dover
Gatwick
Orpington
Watford
Croydon
Folkestone
Borehamwood
Sutton
Aylesbury
Chelmsford
Brentwood
Chichester
Wembley
Arundel

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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.
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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 junho 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$588Average$780FlexibilityNo cancel feeOn-time71%
DeltaCheapest$597Average$742FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$674Average$770FlexibilityNo cancel feeOn-time69%

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