Cheap flights from Allentown to London from $393
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Allentown to London departing on 7/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Delta flights from Allentown to London Heathrow Airport
Our best Delta deals on Allentown to London Heathrow Airport flight tickets
United Airlines flights from Allentown to London Heathrow Airport
Our best United Airlines deals on Allentown to London Heathrow Airport flight tickets
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How to get the cheapest flight ticket from Allentown to London Heathrow Airport
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest day to depart on your flight to London Heathrow Airport?
Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $691. The most expensive day to fly to London Heathrow Airport is Tuesday, with ticket prices averaging around $1,033.
What is the cheapest time of day to depart on your flight to London Heathrow Airport?
According to our data, the cheapest time of day to fly to London Heathrow Airport is at noon. momondo users have found flights departing from Allentown to London Heathrow Airport at noon for as low as $755. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $1,008.
What is the cheapest airline that flies from Allentown-Bethlehem to London Heathrow?
United Airlines, American Airlines, and KLM are the most popular carriers operating from Allentown-Bethlehem to London Heathrow
What airlines fly to London Heathrow Airport?
United Airlines, British Airways and Iberia are the top three most popular airlines that fly to London Heathrow Airport from Allentown according to our data. United Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 20 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.
When to book flights from Allentown to London Heathrow Airport
Cheap Allentown to London Heathrow Airport (ABE to LHR) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Allentown to London Heathrow Airport
How far is Allentown-Bethlehem to London Heathrow by plane?
The distance between Allentown-Bethlehem and London Heathrow is about 3510.6 mi. In terms of flight time, this usually takes a little over 11h 27m.
When did momondo last update prices for flights from Allentown-Bethlehem Airport to London Heathrow Airport?
Prices for flights from Allentown-Bethlehem Airport to London Heathrow Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Allentown-Bethlehem Airport to London Heathrow Airport?
As of June 2025, there are 3 operators available to choose from for flights from Allentown-Bethlehem Airport to London Heathrow Airport.
How old do you have to be to fly from Allentown-Bethlehem Airport to London Heathrow Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Allentown-Bethlehem Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Allentown to London Heathrow Airport?
Based on momondo bookings for flights between Allentown and London Heathrow Airport, the leading airline is United Airlines, making up 38% of the total bookings. Other popular airlines include American Airlines with 31% and Delta with 31%.
Best airlines flying from Allentown to London Heathrow Airport
Compare and see reviews for airlines that fly from Allentown to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $588 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $597 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $674 | Free Cancellation | Rating 7.4 8,809 reviews |
Traveling to a place near London?
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Why should I use momondo to find a flight deal from Allentown to London?
Finding the right flight to London from Allentown is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.
Can I find flights from Allentown to London with flexible booking policies on momondo?
All flight searches from Allentown to London on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Allentown to London?
Once all potential Allentown to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Allentown to London right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Allentown to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.