$399 Find Cheap Flights from Allentown to the United Kingdom

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 the United Kingdom 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

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Cheap Flights from Allentown to the United Kingdom

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
London
London1 stop$630
Edinburgh
Edinburgh1 stop$664
Manchester
Manchester2 stops$732
London
London1 stop$630
Edinburgh
Edinburgh1 stop$664
Manchester
Manchester2 stops$732

Book Cheap Allentown to the United Kingdom Plane Tickets

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

Sun, Sep 14 - Wed, Sep 24
United Airlines Logo
1:00 pm - 6:20 amABE-LHR
12h 20m1 stop
United Airlines Logo
8:40 am - 10:38 amLHR-ABE
30h 58m2 stops
$630United Airlines
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Wed, Sep 10 - Thu, Sep 25
United Airlines Logo
1:00 pm - 6:20 amABE-LHR
12h 20m1 stop
United Airlines Logo
6:50 am - 4:53 pmLHR-ABE
15h 03m2 stops
$637United Airlines
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Wed, Sep 10 - Wed, Sep 17
Delta Logo
2:30 pm - 12:05 pmABE-EDI
16h 35m1 stop
Delta Logo
10:00 am - 5:31 pmEDI-ABE
12h 31m1 stop
$664Delta
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Tue, Sep 16 - Tue, Sep 23
 Logo
12:48 pm - 11:10 amABE-LHR
17h 22m1 stop
 Logo
6:15 am - 5:31 pmLHR-ABE
16h 16m2 stops
Tue, Sep 16 - Tue, Sep 23
Delta Logo
12:48 pm - 1:10 pmABE-LHR
19h 22m2 stops
Delta Logo
6:15 am - 5:31 pmLHR-ABE
16h 16m2 stops
$676Delta
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Tue, Sep 16 - Tue, Sep 23
American Airlines Logo
2:37 pm - 9:05 amABE-LHR
13h 28m1 stop
American Airlines Logo
9:15 am - 6:30 pmLHR-ABE
14h 15m1 stop
$677American Airlines
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Mon, Dec 15 - Tue, Dec 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
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Fri, Sep 19 - Fri, Sep 26
American Airlines Logo
7:00 pm - 12:30 pmABE-LHR
12h 30m1 stop
American Airlines Logo
11:00 am - 6:30 pmLHR-ABE
12h 30m1 stop
$698American Airlines
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Wed, Sep 17 - Wed, Sep 24
 Logo
12:48 pm - 10:45 amABE-EDI
16h 57m2 stops
 Logo
10:00 am - 5:31 pmEDI-ABE
12h 31m1 stop
Wed, Sep 17 - Wed, Sep 24
KLM Logo
12:48 pm - 12:05 pmABE-EDI
18h 17m1 stop
KLM Logo
10:00 am - 10:41 pmEDI-ABE
17h 41m1 stop
$894KLM
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Booking Insights

KAYAK's insights & trends for Allentown to the United Kingdom flights

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

Which airlines provide the cheapest flights from Allentown to the United Kingdom?

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 the United Kingdom were found on United Airlines ($630) and Delta ($664).


Good to know

Low seasonNovember
Cheapest flight$399
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from Allentown to London Heathrow Airport

FAQs - booking United Kingdom flights

  • How does KAYAK find such low prices on flights from Allentown to the United Kingdom?

    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 the United Kingdom.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Allentown to the United Kingdom 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 the United Kingdom?

    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 from Allentown to the United Kingdom with an airline and back with another airline.

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

    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 from Allentown to the United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to the United Kingdom?

    The cheapest time of day to fly to the United Kingdom is generally in the morning, when round-trip flights cost $817 on average. On average, there is no price difference when choosing to fly in the morning or the evening on this flight route. The most expensive time of day to fly to the United Kingdom is generally at night, which is peak travel time and where the average cost of a ticket is $1,154.

Reviews of the top 3 airlines serving from Allentown to the United Kingdom

 
Need help choosing which airline to fly with from Allentown to the United Kingdom? 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.
8.0
DeltaOverall score based on 7987 reviews
7.9Entertainment
8.2Boarding
7.3Food
8.5Crew
7.9Comfort
Airline reviews

Having to up charge for a seat assignment is not good. Delta can do better

8.0 ExcellentJacob, Aug 2025SLC - LWS
Read more Delta reviews

Having to up charge for a seat assignment is not good. Delta can do better

I liked the friendliness of the staff. The cleanliness of all 3 planes.

Was charged for my luggage despite having been on one ticket from an international flight. Too tired to argue after 15 hours on flight. Was charged for rechecking it at JFK airport. Not sure why those off Kenya Airways were required to do that.

De planning was an absolute mess. We were never told that we weren’t at the gate and that we had to go down unstable stairs and then hop on a bus. People were falling, we couldn’t tell who was in charge. Overall terrible communication that ended up leaving a bad impression at the very end of the experience.

My experience on any Delta flight is always overshadowed by the time Delta removed me from a flight for no apparent reason.

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Only issue was with seating. The economy fare we purchased did say there was no guarantee the three people in our party would be seated together, and we were not. At the gate, the agent told us more specifically, the fare we purchased meant we would be seated in middle seats only. This should just be made more obvious.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

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.

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

Flight was delayed and after being in the airport for like seven hours, it was canceled.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

Overall very good, only complaint I have is the crew from CLT to SAT could have collected trash sooner.

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

We started with trouble checking in 24 hours early. Then my husband did not get his TSA precheck. Finally flight delayed due to no crew. I know things happen

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

It’s a great flight. Service is good. Staff is awesome.

Again flight was awesome except British Airways lost both gate checked luggage’s. Still missing

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