Cheap flights from the United Kingdom to Hanoi from £251

The month of May is, on average, the cheapest month to fly to Hanoi from United Kingdom, with most prices found around £550. If you’re not able to fly to Hanoi in May, then November is your next best option. Flight prices from United Kingdom to Hanoi during November average around £565.

The cheapest day to depart from United Kingdom to Hanoi is on a Monday when prices can be found for as low as £782. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from United Kingdom to Hanoi for around £894.

According to our data, the cheapest time of day to fly to Hanoi is in the afternoon. momondo users have found flights departing from United Kingdom to Hanoi in the afternoon for as low as £754. 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 £893 per ticket.

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

You are more likely to see cheaper flights to Hanoi from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Hanoi for around £732 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 United Kingdom for as low as £670 on momondo.

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

Air China, Shenzhen Airlines, and Juneyao Airlines are the most popular carriers operating from United Kingdom to Hanoi Noibai

Etihad Airways, Qatar Airways and Vietnam Airlines are the top three most popular airlines that fly to Hanoi from United Kingdom according to our data. Etihad Airways is the first choice among our users, with 34% of people opting to fly with this airline when travelling to Hanoi. Keep in mind that there are 18 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 United Kingdom 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.

As of October 2026, there are 8 flights per week flying from United Kingdom to Hanoi. The most common day of the week flights depart is Mon, with 25% of flights taking off on this day.

The flight from United Kingdom to Hanoi depends on which airports you’re departing from and arriving to, and whether or not you have a layover. If you fly from London (a popular airport in United Kingdom) to Hanoi (the most popular airport in Hanoi), then the flight time is 13h 38m on average. If you fly from Manchester (another popular airport in United Kingdom) to Hanoi, then the average flight time is 14h 40m.