LHR - ABE

£387 Find Cheap Flights from London Heathrow Airport to Allentown

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Allentown departing on 18/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Allentown

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Allentown, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Allentown, as well as popular online travel agencies
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Everything you should know

Cheapest return fare
£592
Delta
Wed 28/1Wed 4/2
LHR - ABE • 2 stops
Cheapest one-way flight
£387
Delta
Wed 18/2
LHR - ABE • 2 stops
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Heathrow to Allentown (LHR-ABE)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Allentown that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to Allentown

Wed, 28 Jan - Wed, 4 Feb
Delta Logo
08:40 - 22:50
LHR
-
ABE
19h 10m2 stops
Delta Logo
06:28 - 08:05
ABE
-
LHR
20h 37m2 stops
£592Delta
Wed, 28 Jan - Tue, 3 Feb
Delta Logo
08:55 - 17:14
LHR
-
ABE
13h 19m1 stop
Delta Logo
17:59 - 11:40
ABE
-
LHR
12h 41m1 stop
£605Delta
Tue, 7 Apr - Wed, 22 Apr
Delta Logo
09:55 - 22:47
LHR
-
ABE
17h 52m2 stops
Delta Logo
06:30 - 11:00
ABE
-
LHR
23h 30m2 stops
£618Delta
Mon, 23 Mar - Tue, 31 Mar
Delta Logo
12:30 - 22:47
LHR
-
ABE
14h 17m1 stop
Delta Logo
12:46 - 06:45
ABE
-
LHR
12h 59m1 stop
£619Delta
Wed, 25 Mar - Wed, 15 Apr
Delta Logo
08:40 - 22:47
LHR
-
ABE
18h 07m2 stops
Delta Logo
17:40 - 13:30
ABE
-
LHR
14h 50m1 stop
£621Delta
Thu, 29 Jan - Thu, 5 Feb
Delta Logo
06:30 - 22:50
LHR
-
ABE
21h 20m2 stops
Delta Logo
06:28 - 06:20
ABE
-
LHR
18h 52m2 stops
£622Delta
Tue, 24 Mar - Wed, 15 Apr
Delta Logo
09:00 - 22:47
LHR
-
ABE
17h 47m2 stops
Delta Logo
13:00 - 10:15
ABE
-
LHR
16h 15m2 stops
£626Delta
Mon, 6 Apr - Sun, 19 Apr
Delta Logo
13:05 - 22:47
LHR
-
ABE
14h 42m1 stop
Delta Logo
17:40 - 06:30
ABE
-
LHR
31h 50m1 stop
£631Delta
Tue, 24 Mar - Tue, 14 Apr
Delta Logo
15:50 - 12:06
LHR
-
ABE
24h 16m1 stop
Delta Logo
17:40 - 11:10
ABE
-
LHR
12h 30m1 stop
£634Delta
Thu, 29 Jan - Thu, 5 Feb
Delta Logo
10:45 - 22:50
LHR
-
ABE
17h 05m1 stop
Delta Logo
12:48 - 11:40
ABE
-
LHR
17h 52m1 stop
£635Delta
Booking Insights

KAYAK's insights & trends for Heathrow to Allentown flights

Get data-powered insights and trends into flights from Heathrow to Allentown to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly direct between London Heathrow Airport and Allentown?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from London Heathrow Airport to Allentown.

There is just one airline that flies from London Heathrow Airport to Allentown direct and that is Finnair. The best return deal found from Finnair for the route is £532.

Find deals

Good to know - Cheap tickets from London Heathrow Airport to Allentown

Cheapest flight£387
Flight from London Heathrow Airport to Allentown

When to book flights from Heathrow to Allentown

Are your dates flexible? Find out the best times to travel from Heathrow to Allentown based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking London Heathrow Airport to Allentown flights

  • What is the cheapest flight from London Heathrow Airport to Allentown?

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to Allentown was £387 for a one-way ticket and £592 for a return.

  • Which aircraft models fly most regularly from London Heathrow Airport to Allentown?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London Heathrow Airport to Allentown?

    oneworld is the only airline alliance operating flights between London Heathrow Airport and Allentown.

  • How does KAYAK find such low prices on flights from London Heathrow Airport to Allentown?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Heathrow Airport to Allentown.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to Allentown?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Allentown from London Heathrow Airport is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Heathrow Airport to Allentown?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Allentown with an airline and back to London Heathrow Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport to Allentown?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Allentown from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Heathrow to Allentown

 
See real verified KAYAK customer reviews for airlines flying from London to Allentown. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Heathrow to Allentown? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.6
FinnairOverall score based on 1336 reviews
6.9Entertainment
6.7Food
8.1Crew
7.6Boarding
7.4Comfort
Airline reviews

All reviews good because...flight from BWI to London ,economy seats was miserable. I usually book 1,step up from economy but this would have added 1500 bucks 1 way. Bit the bullet and upgraded for retun flight, otherwise all ratings would have been rock bottom.

8.0 ExcellentDavid, Oct 2025
LHR - BWI
Read more Finnair reviews

All reviews good because...flight from BWI to London ,economy seats was miserable. I usually book 1,step up from economy but this would have added 1500 bucks 1 way. Bit the bullet and upgraded for retun flight, otherwise all ratings would have been rock bottom.

Great. It was awesome to have boarding from the front and back of the plane as it made the process go very quickly

It was okay. The airplane was a little smaller than a flight from Thailand to Helsinki.

Wish that everyone would board the back of the plane first. Also let kids on first. The gate wasn’t open at arrival and we waited 45 minutes to takeoff. They made up for time in the air.

This was an absolutely exceptional flight. The flight attendants were extremely attentive and very friendly. They seemed to go out of their way to make us comfortable and to make sure that we had everything we needed., We were in business and were very happy with the size and the details for our pods. We would definitely recommend Finnair and will definitely be flying with them again.

We had an excellent trip with Finnair. This was our first time and we’re very pleased. The only issue was with the boarding - it was a little bit confusing and needs a little bit of streamlining.

Crew very lovely. Arrived an hour late due to bad weather. We were given new tickets to an other flight but it could have been organised better, so we did not have to run through the whole airport to.

Major problems checking in at Alaska counter. They could not find our booking code because it came from Finnair.

Do not use KAYAK or Finair for future travel. Unless you purchase the tickets directly from the airline, you were going to have a difficult time checking in. Kayak canceled my flights twice and ended up causing great difficulty in me getting back from Europe because they double sold my tickets between American Airlines and Finair. The event caused significant delays and led to me having to rebook my flights.

The staff were all particularly great. The plane was clean and fresh. The bassinet worked great. It was all very nice.

Everything you need to know for your flight from Heathrow to Allentown

Information on your arrival and departure airports

London Heathrow Airport (LHR)
Allentown (ABE)