ABE - LON

$564 Find Cheap Flights from Allentown to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Allentown to London departing on 7/17. 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

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

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

Cheap Flights from Allentown to London (ABE-LON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Allentown to London 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 round-trip flight deals from Allentown to London

Wed, Sep 24 - Tue, Oct 7
Delta Logo
1:00 pm - 1:30 pmABE-LHR
19h 30m1 stop
Delta Logo
3:15 pm - 11:23 pmLHR-ABE
13h 08m1 stop
$612Delta
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Wed, Aug 13 - Thu, Aug 21
Delta Logo
6:00 am - 6:45 amABE-LHR
19h 45m1 stop
Delta Logo
1:05 pm - 10:57 pmLHR-ABE
14h 52m1 stop
$613Delta
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Tue, Sep 16 - Fri, Sep 26
KLM Logo
6:30 am - 6:45 amABE-LHR
19h 15m1 stop
KLM Logo
1:05 pm - 11:23 pmLHR-ABE
15h 18m1 stop
$657KLM
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Wed, Jul 30 - Tue, Aug 5
American Airlines Logo
7:30 pm - 12:30 pmABE-LHR
12h 00m1 stop
American Airlines Logo
9:15 am - 7:33 pmLHR-ABE
15h 18m1 stop
$683American Airlines
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Mon, Oct 6 - Mon, Oct 13
United Airlines Logo
5:28 pm - 11:45 amABE-LHR
13h 17m1 stop
United Airlines Logo
8:30 am - 4:53 pmLHR-ABE
13h 23m1 stop
$702United Airlines
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Thu, Jul 31 - Thu, Aug 7
American Airlines Logo
8:03 pm - 12:30 pmABE-LHR
11h 27m1 stop
American Airlines Logo
9:15 am - 7:05 pmLHR-ABE
14h 50m1 stop
$733American Airlines
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Thu, Aug 14 - Thu, Aug 21
United Airlines Logo
5:35 pm - 11:45 amABE-LHR
13h 10m1 stop
United Airlines Logo
6:50 am - 4:53 pmLHR-ABE
15h 03m2 stops
$741United Airlines
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Thu, Jul 31 - Thu, Aug 7
 Logo
4:11 pm - 11:55 amABE-LHR
38h 44m3 stops
 Logo
6:45 pm - 10:45 pmLHR-ABE
33h 00m3 stops
$1,109
Find Deal
Thu, Jul 31 - Thu, Aug 7
 Logo
7:00 am - 8:20 pmABE-LHR
32h 20m2 stops
 Logo
4:35 pm - 10:45 pmLHR-ABE
35h 10m3 stops
$1,151
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Sun, Jul 6 - Fri, Jul 11
KLM Logo
6:05 pm - 1:30 pmABE-LHR
14h 25m1 stop
KLM Logo
1:05 pm - 10:30 pmLHR-ABE
14h 25m1 stop
$1,953KLM
Find Deal
Useful Info

KAYAK's insights & trends for Allentown to London flights

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

Which airlines provide the cheapest flights from Allentown to London?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Allentown to London were found on Delta ($612) and KLM ($657).

Good to know

Low seasonFebruary
High seasonMay
Cheapest flight$564
Best time to beat the crowds with an average 53% drop in price.
Most popular time to fly and prices are also 27% lower on average.
Flight from Allentown to London Heathrow Airport

When to book flights from Allentown to London

Are your dates flexible? Find out the best times to travel from Allentown to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 flights from Allentown to London

  • What is the cheapest flight from Allentown to London?

    In the last 3 days, the lowest price for a flight from Allentown to London was $564 for a one-way ticket and $612 for a round-trip.

  • Do I need a passport to fly between Allentown and London?

    Yes

  • Which airports will I be using when flying from Allentown to London?

    When flying out of Allentown you will be using Allentown-Bethlehem. You will be landing at one of these airports: London Gatwick or London Heathrow.

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

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

  • Which airline alliances offer flights from Allentown to London?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Allentown and London, with SkyTeam being the most commonly used for this route.

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

    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 Allentown to London.

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

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

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

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

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

    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 London from Allentown 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 Allentown to London

 
See real verified KAYAK customer reviews for airlines flying from Allentown to London. 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 Allentown to London? 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.
7.4
United AirlinesOverall score based on 8810 reviews
7.7Boarding
7.0Entertainment
6.6Food
8.1Crew
7.3Comfort
Airline reviews

Gate agent did not hold flight for connection, provided no assistance to get new flight

2.0 MediocreJack, Jun 2025SAT - IAH
Read more United Airlines reviews

Gate agent did not hold flight for connection, provided no assistance to get new flight

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

United airlines, mediocre at best. No issues , nothing great . Worked for me

Boarding experience was smooth. Flight attendants were friendly and helpful. Entertainment system on the Houston-Edmonton flight did not function for passengers on the left side of the aisle. On the bird's eye flight from Quito to Houston, they should not serve a meal. No one needs to eat after midnight and it is disturbing for those passengers trying to sleep.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Terrible. Out flight was delayed for 21 (twenty one) hours. United is a joke.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

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

Information on your arrival and departure airports

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