Cheap Flights from Sihanoukville to Hanoi

Travellers and cabin class

Compare Sihanoukville to Hanoi flight deals

Find the cheapest month or even day of the year to fly to Hanoi

Book the best Hanoi fare with no extra fees

Flight deals from Sihanoukville to Hanoi

Looking for a cheap last-minute deal or the best return flight from Sihanoukville to Hanoi? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Sihanoukville to Hanoi

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Sihanoukville to Hanoi flights are currently cheapest in August.

Sihanoukville to Hanoi: Alternative routes

Compare routes from Sihanoukville to Hanoi below. You may find an airport to fly into that's cheaper, faster, or easier than Hanoi.

Sihanoukville to Hanoi: Flight information

The things to know before you go.
Cheapest flight found355 €
Cheapest month to flyAugust

Finding cheap flights from Sihanoukville to Hanoi: Frequently asked questions

The best price we found for a return flight from Sihanoukville to Hanoi is 355 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Sihanoukville to Hanoi. But we found flights with one or more stops from 355 €.
As of May 2025, there are no flights flying from Sihanoukville to Hanoi.
The cheapest month to fly from Sihanoukville to Hanoi is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Sihanoukville Airport to Hanoi Airport on Friday, 8 August 2025.
No airlines currently offer direct flights between Sihanoukville Airport and Hanoi Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Hanoi but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Hanoi is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Cambodia Angkor Air offers the cheapest flight tickets to Hanoi.

Travelling from Sihanouk International Airport (KOS) to Noi Bai International Airport (HAN): what you need to know

  • Sihanoukville and Hanoi are both in the UTC+7 timezone. This means you won't have to adjust your watch after you land.

  • For a smooth journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This way, you'll have plenty of time to catch your KOS to HAN flight.

  • Flying during a peak time such as January? Public holidays and other popular periods can mean longer queues at check-in and security. Be extra cautious and get there up to four hours before international flights and two hours before domestic departures.

  • We make it a breeze to book a flight with a stopover. To see your options for tickets from Sihanouk International Airport to Noi Bai International Airport, uncheck 'Direct flights only.' Then, pick a flight offering a stop long enough to explore the city of your choice. Popular stopovers between KOS and HAN include:

    • Tan Son Nhat International Airport

    • Siem Reap-Ankor International Airport

    • Kuala Lumpur International Airport

How to find the cheapest flights from Sihanouk International Airport (KOS) to Noi Bai International Airport (HAN)

  • Currently, 158 € is the cheapest price we've seen for a one-way Sihanouk International Airport to Noi Bai International Airport flight. The best price for a return ticket is 355 €. Keep in mind that fares could change due to demand at the time of booking.

  • Don't leave everything to the last minute. You're more likely to find cheap tickets from KOS to HAN if you book early. Airlines often have some excellent early bird rates.

  • Getting cheap flights from Sihanouk International Airport to Noi Bai International Airport is easy if you're flexible with your trip dates. Use the 'Whole month' search tool to see the lowest fares throughout the month and score a great deal.

  • You won't have to check every day to see if fares have dropped when you set up a Price Alert. We'll send you an update as soon as there's a change in price on cheap flights from KOS to HAN.

  • Discover the perfect flight for you with the help of the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Sihanouk International Airport to Noi Bai International Airport, use the 'Sort by' function. You can also filter results by departure and arrival times, airline, and journey duration.

Handy information about Sihanouk International Airport (KOS)

  • Of all flights leaving Sihanouk International Airport, 78.65% touch down on time at their destination.

  • Central Sihanoukville to Sihanouk International Airport is around 24 kilometres. Depending on traffic, it'll take about 45 minutes to get there if you're driving, ride-sharing or catching a cab.

  • Want a hotel to stay in before your flight from Sihanouk International Airport to Noi Bai International Airport? Consider Sok Sabay Resort. Get a good night's sleep here before making your way to KOS.

Arriving at Noi Bai International Airport (HAN)

  • If you're landing on a late Sihanouk International Airport to Noi Bai International Airport flight, few things top the convenience of staying near the terminal. Collect your bags from the carousel and then be showered and relaxing shortly after at one of these options near HAN:

  • Set your own pace with a Noi Bai International Airport rental car. Pick up a set of wheels from Dichung Car Hire to explore beyond Hanoi's usual tourist stops.

  • Book your vehicle from Noi Bai International Airport at least a few weeks before your departure to get the best deal. If you're going away during peak season, you may want to book even earlier.

Getting from Noi Bai International Airport (HAN) to central Hanoi

  • Noi Bai International Airport is approximately 26 kilometres from the centre of Hanoi. The drive time takes about 35 minutes.

  • It takes around 1 hour 55 minutes to get there by public transport.

When to fly to Noi Bai International Airport (HAN)

  • The quietest month for a flight from Sihanouk International Airport to Noi Bai International Airport is April, while July is the most popular. Choose the ideal time to visit Hanoi based on whether you prefer a laid-back vibe or a more bustling atmosphere.

  • When reserving your flight from Sihanouk International Airport to Noi Bai International Airport, think about the kind of weather you like. June is the warmest month in Hanoi, with the temperature ranging from 25ºC (77ºF) to 36ºC (97ºF).

  • For cooler conditions, search for a cheap ticket from KOS to HAN in January. Temperatures average between 10ºC (50ºF) and 22ºC (72ºF) then.

Explore more of Vietnam

  • You've visited Hanoi, now it's time to explore other corners of Vietnam. Travel around 48 kilometres north-west to Việt Trì to check off its leading sights. From Vườn Lan Hiền Vũ to Nhà Vườn Tiến An and Vườn lan Ngọc Tân, your itinerary will be busy.

  • Móng Cái is another sought-after destination in Vietnam and is around 225 kilometres east of Hanoi. No trip is complete without experiencing Tra Co beach, Moncay Catholic Church and Chimsu Chill on the beach.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.