If you're looking to fly from London Heathrow to Hanoi, you might like to know that 24 / Sep / 2025 currently has the cheapest flights. At the moment, there are 17 airlines flying to Hanoi. Go through the results to find the right flights for you – you can adjust the filters to see find even more flights to Hanoi.
There are 1,946 flights from London Heathrow to or via Hanoi every week. Out of the 17 available airlines, the most popular ones are Qatar Airways, Vietnam Airlines & Turkish Airlines. But that doesn’t necessarily mean they’ll be the best option for your travel dates. To see as many flights as possible, try widening your search to include other departure airports.
The distance between London Heathrow to Hanoi is 9245 km. Normally, it takes about 17 hrs 50 mins to fly, and you can definitely expect the journey to be at least 11 hrs 45 mins. You can see the various flight times in the results.
If you want to travel in April, it's best to book your flights early, as this is peak season in Hanoi. The cheapest month to fly is normally December – try searching three to four months prior to then to get a bargain. You can also search by month, which will reveal the cheapest time of the week to fly.
