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Cheap flights from the United Kingdom to Allentown from £427

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 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ABE
21 Apr — 28 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Allentown

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to Allentown
Explore the most affordable flight options available from United Kingdom to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 March 2026.

Tue 14/418:05
LHR
-
ABE
2 stops22h 22m
American Airlines
Mon 20/412:00
ABE
-
LHR
2 stops17h 15m
American Airlines
Deal found 20/3£649
Fri 17/418:05
LHR
-
ABE
2 stops22h 22m
American Airlines
Mon 20/412:00
ABE
-
LHR
2 stops17h 15m
American Airlines
Deal found 20/3£650
Fri 17/408:15
LHR
-
ABE
2 stops21h 07m
American Airlines
Thu 23/406:04
ABE
-
LHR
1 stop19h 51m
American Airlines
Deal found 20/3£658
Fri 17/413:25
LHR
-
ABE
1 stop14h 35m
Virgin Atlantic
Tue 21/412:53
ABE
-
LHR
1 stop13h 22m
Virgin Atlantic
Deal found 20/3£669
Thu 16/411:35
LHR
-
ABE
2 stops17h 47m
American Airlines
Mon 20/412:00
ABE
-
LHR
2 stops17h 15m
American Airlines
Deal found 20/3£679
Tue 14/408:15
LHR
-
ABE
2 stops20h 13m
American Airlines
Tue 21/412:57
ABE
-
LHR
2 stops15h 53m
American Airlines
Deal found 20/3£687
Fri 17/408:15
LHR
-
ABE
2 stops21h 07m
American Airlines
Fri 24/412:00
ABE
-
LHR
2 stops15h 30m
American Airlines
Deal found 20/3£688
Sat 18/411:20
LHR
-
ABE
2 stops16h 40m
Delta
Mon 20/412:53
ABE
-
LHR
2 stops18h 42m
Delta
Deal found 20/3£697
Sun 12/418:35
LHR
-
ABE
2 stops51h 44m
KLM
Sun 19/417:59
ABE
-
LHR
1 stop31h 26m
KLM
Deal found 19/3£712
Wed 15/418:05
LHR
-
ABE
2 stops22h 22m
American Airlines
Thu 23/406:04
ABE
-
LHR
2 stops18h 46m
American Airlines
Deal found 20/3£715
Tue 14/408:15
LHR
-
ABE
2 stops20h 13m
American Airlines
Fri 24/412:00
ABE
-
LHR
1 stop16h 05m
American Airlines
Deal found 20/3£717
Tue 19/513:00
MAN
-
ABE
1 stop33h 28m
Virgin Atlantic
Tue 26/506:23
ABE
-
MAN
1 stop21h 27m
Virgin Atlantic
Deal found 19/3£758

Find flight deals from United Kingdom to Allentown

Keep the following information in mind while searching for United Kingdom to Allentown flight deals. Data was last updated 22 March 2026.

Round-trip from

£649

One-way from

£427

Popular in

July

Cheapest in

September

Average price

£409
American Airlines
  • American Airlines
  • 14/4-20/4
  • 4 total stops
  • 39h 37m total
  • United Kingdom to Allentown
Search Deals
24/8
  • 24/8
  • 1 total stop
  • 14h 05m total
  • United Kingdom to Allentown
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£22 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom to Allentown 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 858,174 searches. Data last updated 22 March 2026.
Use the filters below to find and compare flights from the United Kingdom to Allentown that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 18/4

11:20-23:00

2 stops16h 40m

Allentown-Bethlehem

Thu 23/4

06:33-06:25

1 stop18h 52m

£697

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sat 18/4

09:20-17:19

1 stop12h 59m

Allentown-Bethlehem

Sun 19/4

17:59-06:25

1 stop31h 26m

£697

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 15/4

09:20-17:19

1 stop12h 59m

Allentown-Bethlehem

Sun 19/4

17:59-06:25

1 stop31h 26m

£726

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Sun 12/4

18:55-23:00

2 stops33h 05m

Allentown-Bethlehem

Sun 19/4

17:59-08:50

2 stops33h 51m

£737

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 22/4

09:30-09:48

2 stops29h 18m

Allentown-Bethlehem

Sun 26/4

17:43-06:45

1 stop32h 02m

£767

ManchesterAllentown

MAN - ABE

MANABE

Manchester

Tue 19/5

13:00-12:19

1 stop28h 19m

Allentown-Bethlehem

Tue 26/5

18:15-16:55

2 stops17h 40m

£784

LondonAllentown

LHR - ABE

LHRABE

London Heathrow

Wed 3/6

11:10-23:19

1 stop17h 09m

Allentown-Bethlehem

Mon 15/6

17:06-11:15

1 stop13h 09m

£796

EdinburghAllentown

EDI - ABE

EDIABE

Edinburgh Turnhouse

Wed 22/4

12:30-09:48

2 stops50h 18m

Allentown-Bethlehem

Sun 26/4

17:43-10:35

2 stops35h 52m

£810

ManchesterAllentown

MAN - ABE

MANABE

Manchester

Wed 22/4

10:35-09:48

2 stops28h 13m

Allentown-Bethlehem

Sun 26/4

17:43-17:10

2 stops42h 27m

£822

ManchesterAllentown

MAN - ABE

MANABE

Manchester

Tue 2/6

06:55-23:19

2 stops21h 24m

Allentown-Bethlehem

Tue 9/6

17:06-15:10

2 stops17h 04m

£849

Flights are sorted by cheapest return flights first.

Deals found on 17/3

Showing 1-10 of 45 resultsSorted by cheapest first
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Best time to book a flight from United Kingdom to Allentown

Have a flexible travel schedule? Discover the best time to fly to Allentown from United Kingdom with our price prediction graph.
Estimated return 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 the United Kingdom to Allentown

What is the cheapest month to book a flight from United Kingdom to Allentown?

Currently, March is the cheapest month in which you can book a flight from United Kingdom to Allentown (average of £301). Flying from United Kingdom to Allentown in June is currently the most expensive (average of £357). 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.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Allentown. 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 into for flights to Allentown from United Kingdom?

    For a flight from United Kingdom to Allentown, you will be flying into Allentown-Bethlehem. Allentown-Bethlehem (ABE) is just 3.9 mi from the center of the city.

  • How long is the flight from United Kingdom to Allentown?

    Airlines like Delta, Virgin Atlantic, and United Airlines fly from United Kingdom to Allentown in about 16h 40m. The time it takes to get you to your destination can typically vary by up to 16h 25m. The distance between United Kingdom and Allentown is about 3507 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most popular routes from United Kingdom to Allentown?

    The most popular route from United Kingdom to Allentown is Manchester - Allentown-Bethlehem. You may also consider Edinburgh Turnhouse - Allentown-Bethlehem or London Heathrow - Allentown-Bethlehem.

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

    Yes. In addition to deals on United Kingdom to Allentown flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to Allentown?

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

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

    Yes. Cheapflights offers flight deals from United Kingdom to Allentown 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 United Kingdom to Allentown?

    Currently, March is the cheapest month in which you can book a flight from United Kingdom to Allentown (average of £301). Flying from United Kingdom to Allentown in June is currently the most expensive (average of £357). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for United Kingdom to Allentown

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

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How does Cheapflights help users find flights from United Kingdom to Allentown?

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Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Allentown?

Millions of users choose and trust Cheapflights to book the best flight deals from United Kingdom to Allentown for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from United Kingdom to Allentown with no change fees?

Yes, we can. To see specific flights from United Kingdom to Allentown with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from United Kingdom to Allentown become cheaper?

Not ready to book yet? You can track prices for flights from United Kingdom to Allentown on Cheapflights with our Price Alert feature and get notified when better prices are available.

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