Cheap Flights from Hanoi (HAN) to Sihanoukville (KOS)

Compare Hanoi to Sihanoukville flight deals

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

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Flight deals from Hanoi to Sihanoukville

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

Sihanoukville.£259 per passenger.Departing Fri, 6 Feb, returning Tue, 10 Feb.Return flight with VietJet Air and Air Cambodia.Outbound indirect flight with VietJet Air, departs from Hanoi on Fri, 6 Feb, arriving in Sihanoukville.Inbound indirect flight with Air Cambodia, departs from Sihanoukville on Tue, 10 Feb, arriving in Hanoi.Price includes taxes and charges.From £259, select.

Sihanoukville.£283 per passenger.Departing Thu, 29 Jan, returning Thu, 5 Feb.Return flight with Vietravel Airlines and Air Cambodia.Outbound indirect flight with Vietravel Airlines, departs from Hanoi on Thu, 29 Jan, arriving in Sihanoukville.Inbound indirect flight with Air Cambodia, departs from Sihanoukville on Thu, 5 Feb, arriving in Hanoi.Price includes taxes and charges.From £283, select.

Sihanoukville.£301 per passenger.Departing Tue, 23 Dec, returning Fri, 26 Dec.Return flight with VietJet Air and Air Cambodia.Outbound indirect flight with VietJet Air, departs from Hanoi on Tue, 23 Dec, arriving in Sihanoukville.Inbound indirect flight with Air Cambodia, departs from Sihanoukville on Fri, 26 Dec, arriving in Hanoi.Price includes taxes and charges.From £301, select.

Sihanoukville.£342 per passenger.Departing Sun, 28 Dec, returning Sat, 3 Jan.Return flight with Vietravel Airlines and AirAsia Cambodia.Outbound indirect flight with Vietravel Airlines, departs from Hanoi on Sun, 28 Dec, arriving in Sihanoukville.Inbound indirect flight with AirAsia Cambodia, departs from Sihanoukville on Sat, 3 Jan, arriving in Hanoi.Price includes taxes and charges.From £342, select.

Find the cheapest month to fly from Hanoi to Sihanoukville

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

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Hanoi to Sihanoukville: Alternative routes

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

Hanoi to Sihanoukville: Flight information

The things to know before you go.

Cheapest flight found	£259
Cheapest month to fly	February

Finding cheap flights from Hanoi to Sihanoukville: Frequently asked questions

How much are return flights from Hanoi to Sihanoukville?

The best price we found for a return flight from Hanoi to Sihanoukville is £259. 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.

Which airlines fly direct from Hanoi to Sihanoukville?

Currently, there are no airlines that fly direct from Hanoi to Sihanoukville. But we found flights with one or more stops from £259.

How many flights are there a week from Hanoi to Sihanoukville?

As of December 2025, there are no flights flying from Hanoi to Sihanoukville.

When is the cheapest time to fly from Hanoi to Sihanoukville?

The cheapest month to fly from Hanoi to Sihanoukville is usually February.

Which upcoming date is cheapest to fly from Hanoi Airport to Sihanoukville Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Hanoi Airport to Sihanoukville Airport on Friday, 6 February 2026.

Can I get a direct flight from Hanoi Airport to Sihanoukville Airport?

No airlines currently offer direct flights between Hanoi Airport and Sihanoukville Airport. Most routes have one or more stops.

How can I find the best flight deal to Sihanoukville?

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 Sihanoukville 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.

When is the best time to book flights to Sihanoukville?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Sihanoukville is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Hanoi Airport to Sihanoukville with?

Currently, VietJet Air offers the cheapest flight tickets to Sihanoukville.

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

Hanoi and Sihanoukville share the UTC+7 timezone. This means there's no time difference to consider.
Give yourself plenty of time to make your HAN to KOS flight. As a rule of thumb, arrive two hours before international departures and an hour ahead for domestic flights.
Travelling during a peak time such as July? School holidays and other high seasons can mean longer queues and delays at airport checkpoints. Be extra cautious and arrive up to four hours before an international flight and two hours before domestic departures.
If you'd love to explore a new city along the way, consider a flight with a stopover. To see all your options for tickets from Noi Bai International Airport to Sihanouk International Airport, deselect 'Direct flights only.' Tan Son Nhat International Airport is a sought-after stop between HAN and KOS.

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

The lowest price we've seen for a one-way Noi Bai International Airport to Sihanouk International Airport flight is £109. A return plane ticket right now is £259. Depending on the availability when you book, these fares could change.
It's usually smart to book as early as possible if you're looking for cheap tickets from HAN to KOS. That's because airlines adjust prices based on demand, which tends to increase closer to departure.
Finding cheap flights from Noi Bai International Airport to Sihanouk International Airport is more likely if you can be flexible with your travel plans. Use the 'Whole month' search tool to see the lowest prices throughout the month and bag a great deal.
Cut down on the time spent looking for cheap flights from HAN to KOS by creating a Price Alert. We'll send you an email or push notification on the app when a new discounted fare appears.
Choose your ideal departure and arrival times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from Noi Bai International Airport to Sihanouk International Airport.

Handy information about Noi Bai International Airport (HAN)

75.32% of flights that leave from Noi Bai International Airport land at their destination on time.
To get to Noi Bai International Airport from central Hanoi, it takes about 35 minutes if you're travelling by car. This depends on traffic though. It's approximately 16 miles from the airport to the city centre.
Taking public transport? Expect a journey time of around 1 hour 55 minutes.
Need a handy hotel near HAN? If you're boarding an early flight from Noi Bai International Airport to Sihanouk International Airport, these accommodation options will have you sleeping moments from your check-in counter:

Arriving at Sihanouk International Airport (KOS)

Consider a stay at Sok Sabay Resort after your Noi Bai International Airport to Sihanouk International Airport flight. It's a quick drive from KOS and a good choice if you're eager to relax as soon as possible.

Getting from Sihanouk International Airport (KOS) to central Sihanoukville

Sihanouk International Airport to central Sihanoukville has a drive time of around 45 minutes. It's approximately 15 miles away.

When to fly to Sihanouk International Airport (KOS)

January is the most popular month for flights from Noi Bai International Airport to Sihanouk International Airport. For smaller crowds, head to Sihanoukville in April.
Book your flight from Noi Bai International Airport to Sihanouk International Airport for May if you'd like to visit Sihanoukville during its warmest month. You can expect temperatures of between 25ºC (77ºF) and 31ºC (88ºF).
Search for cheap tickets from HAN to KOS in January if you like cooler conditions. Temperatures are at their lowest then, ranging between 23ºC (73ºF) and 29ºC (84ºF) on average.

Explore more of Cambodia

You've visited Sihanoukville, now it's time to explore other corners of Cambodia. Travel about 120 miles north-east to Phnom Penh to tick off its top attractions. From Royal Palace to Tuol Sleng Genocide Museum and Wat Phnom, there's plenty to keep you on the go.
Around 170 miles north of Sihanoukville, Battambang is another essential stop in Cambodia. Experience this destination's highlights firsthand at The Garden of SamDech Sar Kheng, Spean Thmor Chas and សួននាគសន្តិភាព-Dragon Peace Garden.