$340 Find Cheap Flights from Allentown to London Heathrow Airport - Compare and Save

In the last 5 days, the lowest price for a flight from Allentown to London Heathrow Airport was $340 for a one-way ticket and $759 for a round-trip.

Yes, you'll most likely have to show a valid passport before boarding the plane in Allentown and on arrival in London Heathrow Airport.

Allentown and London Heathrow Airport are both served by 1 main airport. You will leave Allentown from Allentown-Bethlehem and will be arriving at London Heathrow.

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

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 Heathrow Airport.

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

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 Heathrow Airport with an airline and back to Allentown with another airline. Booking your flights between Allentown and LHR can sometimes prove cheaper using this method.

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