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

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Flight deals from Hanoi to Sihanoukville

Looking for a cheap last-minute deal or the best return flight from Hanoi Airport to Sihanoukville Airport? If you want to travel next month, return fares start from £232. Find the lowest prices on one-way and return tickets right here.

Sihanoukville.£107 per passenger.Departing Thu, 1 Oct.One-way flight with VietJet Air.Outbound indirect flight with VietJet Air, departs from Hanoi on Thu, 1 Oct, arriving in Sihanoukville.Price includes taxes and charges.From £107, select.

Sihanoukville.£108 per passenger.Departing Tue, 25 Aug.One-way flight with VietJet Air.Outbound indirect flight with VietJet Air, departs from Hanoi on Tue, 25 Aug, arriving in Sihanoukville.Price includes taxes and charges.From £108, select.

Sihanoukville.£127 per passenger.Departing Sun, 6 Sep.One-way flight with VietJet Air.Outbound indirect flight with VietJet Air, departs from Hanoi on Sun, 6 Sep, arriving in Sihanoukville.Price includes taxes and charges.From £127, select.

Sihanoukville.£141 per passenger.Departing Thu, 6 May.One-way flight with VietJet Air.Outbound indirect flight with VietJet Air, departs from Hanoi on Thu, 6 May, arriving in Sihanoukville.Price includes taxes and charges.From £141, select.

Sihanoukville.£143 per passenger.Departing Fri, 15 Jan.One-way flight with VietJet Air.Outbound indirect flight with VietJet Air, departs from Hanoi on Fri, 15 Jan, arriving in Sihanoukville.Price includes taxes and charges.From £143, select.

Sihanoukville.£145 per passenger.Departing Wed, 7 Apr.One-way flight with VietJet Air.Outbound indirect flight with VietJet Air, departs from Hanoi on Wed, 7 Apr, arriving in Sihanoukville.Price includes taxes and charges.From £145, select.

Sihanoukville.£151 per passenger.Departing Thu, 25 Mar.One-way flight with VietJet Air.Outbound indirect flight with VietJet Air, departs from Hanoi on Thu, 25 Mar, arriving in Sihanoukville.Price includes taxes and charges.From £151, select.

Sihanoukville.£152 per passenger.Departing Mon, 2 Nov.One-way flight with AirAsia.Outbound indirect flight with AirAsia, departs from Hanoi on Mon, 2 Nov, arriving in Sihanoukville.Price includes taxes and charges.From £152, select.

Sihanoukville.£157 per passenger.Departing Tue, 8 Dec.One-way flight with Vietnam Airlines.Outbound indirect flight with Vietnam Airlines, departs from Hanoi on Tue, 8 Dec, arriving in Sihanoukville.Price includes taxes and charges.From £157, select.

Sihanoukville.£162 per passenger.Departing Tue, 2 Feb.One-way flight with Vietnam Airlines.Outbound indirect flight with Vietnam Airlines, departs from Hanoi on Tue, 2 Feb, arriving in Sihanoukville.Price includes taxes and charges.From £162, 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 October.

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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.

Sihanoukville

3 miles from central Sihanoukville

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from £107

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Hanoi to Sihanoukville: Flight information

The things to know before you go.

Cheapest flight found	£107
Cheapest month to fly	October

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 £186. 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 £186.

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

As of August 2026, 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 August.

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, 28 August 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.

Flying from Hanoi Airport (HAN) to Sihanoukville Airport (KOS): what you need to know

Hanoi and Sihanoukville are both in the UTC+7 timezone. That means there's no time difference to adjust for.
Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for hassle-free flying. Be at the airport on time to catch your HAN to KOS flight.
Travelling during a peak time such as June? Major public holidays and other popular seasons can result in longer queues and delays at check-in and security. Play it safe and arrive up to four hours ahead of international flights and two hours before domestic departures.
If you'd love to discover a different city along the way, look for a flight with a stopover. To see your options for tickets from Hanoi Airport to Sihanoukville Airport, deselect 'Direct flights only.' Ho Chi Minh City Airport is a well-known stop between HAN and KOS.

How to find the cheapest flights from Hanoi Airport (HAN) to Sihanoukville Airport (KOS)

Currently, £107 is the cheapest price we've seen for a one-way Hanoi Airport to Sihanoukville Airport flight. The best price for a return plane ticket is £186. Keep in mind that fares may change due to demand when booking.
Don't leave everything to the last minute. You're more likely to get cheap tickets from HAN to KOS if you book early. Airlines often have some excellent early bird discounts.
Getting cheap flights from Hanoi Airport to Sihanoukville Airport is more likely if you can be flexible with your travel dates. Use the 'Whole month' tool to see the best prices across the month and snap up a great deal.
You won't have to check every day to see if fares have dropped when you create a Price Alert. We'll update you the moment there's a new deal on cheap flights from HAN to KOS.
Discover the perfect flight for you by using the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from Hanoi Airport to Sihanoukville Airport, use the 'Sort by' tool. You can also filter by airline, departure and arrival times, and number of stops.

Handy information about Hanoi Airport (HAN)

When it comes to the on-time performance of Hanoi Airport, data shows 72% of flights complete their journey on time.
Central Hanoi to Hanoi Airport is around 31 kms (19 miles). Depending on traffic, it'll take about 40 minutes to get there if you're catching a taxi, ride-sharing or driving.
The trip on public transport will take about 1 hour.
Taking an early flight from Hanoi Airport to Sihanoukville Airport? Avoid the hassle of rushing to the airport (and enjoy a little extra shut-eye) by picking one of these stays near HAN:

Arriving at Sihanoukville Airport (KOS)

Stay moments from the tarmac if you're touching down on a late Hanoi Airport to Sihanoukville Airport flight. Chhay Ing Guesthouse is a comfortable option near KOS. Or check in and relax at Chamka Pich Bungalow & Restaurant before continuing to your final destination.

Getting from Sihanoukville Airport (KOS) to central Sihanoukville

From Sihanoukville Airport, Sihanoukville is approximately 18 kms (11 miles) away. It takes around 20 minutes to reach the centre driving.
Travelling by public transport will take you roughly 35 minutes.

When to fly to Sihanoukville Airport (KOS)

It's time to pick your travel dates for your flight from Hanoi Airport to Sihanoukville Airport. January is the busiest month to visit Sihanoukville. If you like a quieter vibe, go in March.
The warmest month in Sihanoukville is May, with temperatures ranging between 25ºC and 31ºC. Book your flights from Hanoi Airport to Sihanoukville Airport in this month if this is the kind of weather you like.
January has average temperatures of between 23ºC and 29ºC. Search for cheap tickets from HAN to KOS around that time if you like cooler conditions.

Explore more of Cambodia

You've seen Sihanoukville, now it's time to explore other corners of Cambodia. Travel about 193 kms (120 miles) north-east to Phnom Penh to tick off its leading attractions. From Royal Palace to Genocide museum and Documentation Centre of Cambodia, you'll have a packed itinerary ahead.
Battambang is another must-experience destination in Cambodia and is around 274 kms (170 miles) north of Sihanoukville. No journey is complete without experiencing Phare Ponleu Selpak, Phnom Sampeau and Sammaki Art Space.