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$459+ Cheap flights from Allentown (ABE) to Heathrow (LHR)

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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — LHR
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Allentown to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Allentown (ABE) to Heathrow (LHR). 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 September 11, 2025.

Round-trip from

$579
(Trip.com)

One-way from

$459
(Delta)

Popular in

June

Cheapest in

November

Average price

$837
From Allentown-Bethlehem to London Heathrow
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One-way flight from Allentown-Bethlehem to London Heathrow
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Highest demand for flights based on searches. 11% potential increase in price ($107 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Allentown to Heathrow

Cheapest flights from Allentown to Heathrow
Explore the most affordable flight options available from Allentown to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Trip.com deal was found by Cheapflights users on 9/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2612:46 pmABE - LHR
1 stop13h 39mVirgin Atlantic
Sun 11/28:55 amLHR - ABE
1 stop18h 20mVirgin Atlantic
Deal found 9/11$579
This Trip.com deal was found by Cheapflights users on 9/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/212:46 pmABE - LHR
1 stop15h 14mVirgin Atlantic
Tue 11/188:55 amLHR - ABE
1 stop13h 24mVirgin Atlantic
Deal found 9/11$622
This Netflights deal was found by Cheapflights users on 9/11. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/266:00 amABE - LHR
2 stops30h 05mMultiple Airlines
Sun 11/212:30 pmLHR - ABE
1 stop14h 45mMultiple Airlines
Deal found 9/11$643
This Delta deal was found by Cheapflights users on 9/11. 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.
Sun 11/26:00 pmABE - LHR
1 stop34h 00mDelta
Tue 11/189:00 amLHR - ABE
2 stops18h 12mDelta
Deal found 9/11$649
This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/21:00 pmABE - LHR
1 stop12h 20mUnited Airlines
Wed 10/228:40 amLHR - ABE
2 stops30h 58mUnited Airlines
Deal found 9/11$660
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 10/301:00 pmABE - LHR
1 stop12h 55mUnited Airlines
Mon 11/31:30 pmLHR - ABE
2 stops32h 17mUnited Airlines
Deal found 9/10$685
This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/265:22 pmABE - LHR
1 stop13h 53mUnited Airlines
Sun 11/25:50 amLHR - ABE
2 stops14h 57mUnited Airlines
Deal found 9/11$691
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/251:00 pmABE - LHR
1 stop12h 55mUnited Airlines
Sat 11/16:50 amLHR - ABE
2 stops18h 51mUnited Airlines
Deal found 9/9$692
This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:30 amABE - LHR
2 stops18h 25mUnited Airlines
Tue 10/218:45 amLHR - ABE
2 stops30h 53mUnited Airlines
Deal found 9/11$699

Cheapflights Fare Finder

 
Customize your flight search to find flights from Allentown to Heathrow 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 September 11, 2025.
Use the filters below to find and compare flights from Allentown to London Heathrow Airport that are best for you.

Fly from

Allentown

Fly to

Heathrow

Route

Depart

Return

Price

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 10/26

12:46 pm-6:25 am

1 stop13h 39m

London Heathrow

Sun 11/2

8:55 am-10:15 pm

1 stop18h 20m

$579

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 10/26

6:00 am-4:05 pm

2 stops30h 05m

London Heathrow

Sun 11/2

12:30 pm-10:15 pm

1 stop14h 45m

$643

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 11/2

6:00 pm-9:00 am

1 stop34h 00m

London Heathrow

Tue 11/18

9:00 am-10:12 pm

2 stops18h 12m

$649

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 10/2

1:00 pm-6:20 am

1 stop12h 20m

London Heathrow

Wed 10/22

8:40 am-10:38 am

2 stops30h 58m

$660

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Thu 10/30

1:00 pm-5:55 am

1 stop12h 55m

London Heathrow

Mon 11/3

1:30 pm-4:47 pm

2 stops32h 17m

$685

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sun 10/26

5:22 pm-11:15 am

1 stop13h 53m

London Heathrow

Sun 11/2

5:50 am-4:47 pm

2 stops14h 57m

$691

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sat 10/25

1:00 pm-6:55 am

1 stop12h 55m

London Heathrow

Sat 11/1

6:50 am-9:41 pm

2 stops18h 51m

$692

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Mon 9/22

6:12 pm-11:10 am

1 stop11h 58m

$459

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Sat 9/20

6:12 pm-11:10 am

1 stop11h 58m

$509

AllentownLondon

ABE - LHR

ABELHR

Allentown-Bethlehem

Fri 9/19

6:12 pm-11:10 am

1 stop11h 58m

$789

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 11 results
1
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Best time to book a flight from Allentown to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

What is the cheapest month to book a flight from Allentown to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Allentown to London Heathrow Airport (average of $661). Flying from Allentown to London Heathrow Airport in June is currently the most expensive (average of $1,098). 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 LHR?

Find hourly flight availability from Allentown to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from Allentown to London Heathrow Airport, 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 26% versus a flight in the morning.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated September 11, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Allentown to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

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
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

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
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

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
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

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 Heathrow. 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 Heathrow?

    Allentown-Bethlehem (ABE) is the airport you will fly out of if you book a flight from Allentown to London Heathrow. You should not have trouble finding flights to London Heathrow from Allentown-Bethlehem; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Allentown airport to London Heathrow. It is only a 3.9 mi journey to Allentown-Bethlehem (ABE) from Allentown’s city center.

  • How long is the flight from Allentown to London Heathrow Airport?

    Airlines like Virgin Atlantic, Delta, and United Airlines fly from Allentown to London Heathrow Airport in about 12h 20m. The time it takes to get you to your destination can typically vary by up to 21h 40m. The distance between Allentown and London Heathrow Airport 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 Heathrow Airport round-trip?

    Delta, at $581, was found to be the cheapest airline from Allentown to London Heathrow Airport.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Delta is priced at 27% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Allentown to Heathrow that include hotel bookings?

    Yes. In addition to deals on Allentown to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Allentown to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Allentown to Heathrow.

  • Can I find deals for business class flights from Allentown to Heathrow?

    Yes. Cheapflights offers flight deals from Allentown to Heathrow 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 Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Allentown to London Heathrow Airport (average of $661). Flying from Allentown to London Heathrow Airport in June is currently the most expensive (average of $1,098). 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 Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Allentown to Heathrow

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 Heathrow

Discover the top 3 airlines that operate flights from Allentown to Heathrow. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$581Average$724FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$588Average$758FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$690Average$817FlexibilityNo cancel feeOn-time69%

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