If you're looking to fly from London Heathrow to Allentown-Bthlehm, you might like to know that 09 / Oct / 2025 currently has the cheapest flights. At the moment, there are one airlines flying to Allentown-Bthlehm. Go through the results to find the right flights for you – you can adjust the filters to see find even more flights to Allentown-Bthlehm.
The most popular airlines offering flights to Allentown-Bthlehm are Virgin Atlantic. Virgin Atlantic is the most popular one, but that doesn’t mean their flights will be the cheapest. If you can't find a flight time that suits you, why not look at flying out from a different airport?
The distance between London Heathrow to Allentown-Bthlehm is 5652 km. Normally, it takes about 13 hrs 5 mins to fly, and you can definitely expect the journey to be at least 13 hrs 5 mins. You can see the various flight times in the results.
You can also search by month, which will reveal the cheapest time of the week to fly.
