ABE - LON

$399 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 1/18. 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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Flight Deals
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Flight 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

dom., ago. 17 - mié., ago. 27
Delta Logo
6:00 am - 6:45 amABE-LHR
19h 45m1 stop
Delta Logo
1:05 pm - 10:39 pmLHR-ABE
14h 34m1 stop
$528Delta
Find Deal
dom., ago. 17 - sáb., ago. 30
Delta Logo
6:00 am - 6:45 amABE-LHR
19h 45m1 stop
Delta Logo
9:20 am - 5:34 pmLHR-ABE
13h 14m1 stop
$578Delta
Find Deal
dom., ago. 17 - dom., ago. 24
Delta Logo
6:00 am - 6:45 amABE-LHR
19h 45m1 stop
Delta Logo
5:25 pm - 12:16 pmLHR-ABE
23h 51m1 stop
$584Delta
Find Deal
mié., sep. 10 - jue., sep. 25
United Airlines Logo
1:00 pm - 6:20 amABE-LHR
12h 20m1 stop
United Airlines Logo
8:30 am - 4:53 pmLHR-ABE
13h 23m1 stop
$647United Airlines
Find Deal
mié., sep. 10 - jue., sep. 25
United Airlines Logo
1:00 pm - 6:20 amABE-LHR
12h 20m1 stop
United Airlines Logo
8:30 am - 4:53 pmLHR-ABE
13h 23m1 stop
$648United Airlines
Find Deal
lun., dic. 15 - mar., dic. 23
KLM Logo
1:00 pm - 9:00 amABE-LHR
15h 00m1 stop
KLM Logo
8:55 am - 11:14 pmLHR-ABE
19h 19m1 stop
$678KLM
Find Deal
vie., dic. 26 - vie., ene. 2
KLM Logo
6:00 am - 7:50 amABE-LHR
20h 50m1 stop
KLM Logo
8:55 am - 11:14 pmLHR-ABE
19h 19m1 stop
$1,093KLM
Find Deal
vie., sep. 19 - vie., sep. 26
 Logo
1:00 pm - 11:40 amABE-LCY
17h 40m2 stops
 Logo
7:30 pm - 9:54 pmLCY-ABE
31h 24m2 stops
$2,004
Find Deal
vie., sep. 19 - vie., sep. 26
 Logo
6:37 am - 11:40 amABE-LCY
24h 03m3 stops
 Logo
7:30 pm - 9:54 pmLCY-ABE
31h 24m2 stops
$2,008
Find Deal
dom., ago. 17 - dom., ago. 24
WestJet Logo
12:56 pm - 12:05 pmABE-LHR
42h 09m2 stops
WestJet Logo
2:10 pm - 10:39 pmLHR-ABE
37h 29m2 stops
$11,268WestJet
Find Deal
Booking Insights

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 ($528) and United Airlines ($647).

Good to know

Low seasonFebruary
Cheapest flight$399
Best time to beat the crowds with an average 51% drop in price.
Most popular time to fly and prices are also 25% 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 $399 for a one-way ticket and $528 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, and SkyTeam 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 8916 reviews
8.1Crew
7.3Comfort
7.0Entertainment
6.6Food
7.7Boarding
Airline reviews

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

10.0 ExcellentDr. Joseph, Aug 2025ORD - DEN
Read more United Airlines reviews

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

This flight was perfect. No complaints and only the highest regard for the crew and ground staff and how they executed perfectly. I fly a lot with United and would request predictability and transparency in their operations instead of last minute changes.

This is for UA2274 from Houston to Sacramento. The flight was delayed arriving due to mechanical issues so we left about 3 hours later than scheduled. When boarding the plane the temperature inside was excessive - likely close to 100. Pilot apologized and said it was going to improve at altitude, which it did. But before that I honestly thought there might have been more delays removing passengers made ill from the heat. We were delayed leaving due to another mechanical issue. There was not water on the plane due to a panel that was not secured. They did that quickly, but the combination of mechanical issues was rather disturbing and did not reflect well on United.

1. when we went to check in, our 2 first class seats had been CANCELED and the flight was sold out. This was done without our prior knowledge. It was all we could do to restore one first class seat for my wife and I flew economy. 2, Our flight home was scheduled to leave at 10:30 pm. Due to tsunami warnings, the roads were closed and our flight status was uncertain as to whether it would leave as scheduled. It was announced that it would now leave at 11:20 pm and the roads were now open since the tsunami had come and gone. We made a mad dash to the airport and checked in. Delays were announced at 12:30 pm, 1:30 am, 2:30 am and at 3:30 am it was canceled. Since this was a flight due to natural (tsunami) causes, there was no compensation. We were told to return at 1:00 pm the next day and our baggage would be kept on the plane since the same plane was going to leave at 1:00 pm. We had to return to our hotel for the rest of the night. The same plane did not leave at 1:00 pm and our baggage was gone! All in all, it was a miserable performance by UA. Information was hard to obtain and no one knew what was going on and what was going to happen. Hundreds of passengers slept on the floor, chairs, etc. No food and no water was made available to the passengers. It was a situation where UA could care less what was going on. As a one million mile flyer, I had not experienced anything like this before and it was hugely disappointing!

Staff members were not helpful they ignored all calls for an attendant.

Flight was delayed and missed my connection Lufthansa didn’t respond.

Terrible. Delayed 7 hours, and cancelled the flight, leaving me stranded and out of pocket $500 for an alternative last minute flight

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

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

Information on your arrival and departure airports

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