Cheap flights from London to Hanoi from £247

The month of November is, on average, the cheapest month to fly to Hanoi from London, with most prices found around £486. If you’re not able to fly to Hanoi in November, then May is your next best option. Flight prices from London to Hanoi during May average around £501.

The cheapest day to depart from London to Hanoi is on a Monday when prices can be found for as low as £780. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from London to Hanoi for around £892.

According to our data, the cheapest time of day to fly to Hanoi is in the afternoon. momondo users have found flights departing from London to Hanoi in the afternoon for as low as £752. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the morning is when there is more demand to fly to Hanoi, so prices are often more expensive at around £890 per ticket.

Fly from London Heathrow to Hanoi Noibai for the best London - Hanoi Noibai flight prices

You are more likely to see cheaper flights to Hanoi from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Hanoi for around £730 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Hanoi from London for as low as £668 on momondo.

There are 3 cabin classes available to choose from on London to Hanoi flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 4% on your flight if you consider stops on a London to Hanoi flight.

As of October 2026, prices for London to Hanoi flights are approximately 2% cheaper when compared to flights at the same time last year.

Air China, Shenzhen Airlines, and China Eastern are the most popular carriers operating from London to Hanoi Noibai

Vietnam Airlines, Qatar Airways and Etihad Airways are the top three most popular airlines that fly to Hanoi from London according to our data. Vietnam Airlines is the first choice among our users, with 44% of people opting to fly with this airline when travelling to Hanoi. Keep in mind that there are 16 different airlines that fly to Hanoi on a routine basis, so you have a few additional options to choose from.

Historically, on average around 10% of flights between London and Hanoi have experienced a delay on any given week. The average delay length over the past 12 months has been 134 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

According to our data, Vietnam Airlines have had the fewest delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

Shanghai (PVG) was the most common stop: 31% of momondo users choosing one-stop flights on this route connected there.

Flights via Beijing (PEK) offer the lowest average return price of £417.

Flights connecting via Bangkok (BKK) have the shortest average one-way travel time: 14h 52m.

New Delhi (DEL) has the shortest average stopover time for this route: 1h 27m.