Flights to Ko Samui

€593 Cheap flights to Ko Samui

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight to Ko Samui departing on 21/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ireland to Ko Samui

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
09:00 - 18:00
DUB
-
USM
27h 00m
2 stops
Multiple Airlines Logo
09:15 - 07:15
USM
-
DUB
28h 00m
2 stops
€593Multiple Airlines
Thu, 21 May - Thu, 28 May
Multiple Airlines Logo
09:00 - 17:45
DUB
-
USM
26h 45m
2 stops
Multiple Airlines Logo
06:00 - 07:15
USM
-
DUB
31h 15m
2 stops
€609Multiple Airlines
Thu, 7 May - Wed, 20 May
Multiple Airlines Logo
09:00 - 10:45
DUB
-
USM
19h 45m
2 stops
Multiple Airlines Logo
20:50 - 19:05
USM
-
DUB
28h 15m
2 stops
€626Multiple Airlines
Tue, 19 May - Tue, 26 May
Multiple Airlines Logo
09:00 - 20:25
DUB
-
USM
29h 25m
2 stops
Multiple Airlines Logo
17:55 - 07:15
USM
-
DUB
19h 20m
2 stops
€635Multiple Airlines
Mon, 18 May - Mon, 25 May
Multiple Airlines Logo
09:00 - 13:10
DUB
-
USM
22h 10m
2 stops
Multiple Airlines Logo
06:00 - 07:15
USM
-
DUB
31h 15m
2 stops
€681Multiple Airlines
Mon, 4 May - Mon, 11 May
Etihad Airways Logo
18:55 - 21:35
DUB
-
USM
20h 40m
2 stops
Etihad Airways Logo
17:55 - 07:15
USM
-
DUB
19h 20m
2 stops
€705Etihad Airways
Mon, 27 Apr - Mon, 11 May
Etihad Airways Logo
18:55 - 21:35
DUB
-
USM
20h 40m
2 stops
Etihad Airways Logo
17:55 - 07:15
USM
-
DUB
19h 20m
2 stops
€705Etihad Airways
Mon, 27 Apr - Mon, 11 May
Qatar Airways Logo
11:25 - 16:55
ORK
-
USM
23h 30m
3 stops
Qatar Airways Logo
14:30 - 10:45
USM
-
ORK
26h 15m
3 stops
€1,214Qatar Airways
Thu, 23 Apr - Mon, 27 Apr
British Airways Logo
16:10 - 21:10
ORK
-
USM
23h 00m
2 stops
British Airways Logo
16:25 - 15:10
USM
-
ORK
28h 45m
2 stops
€1,866British Airways
Wed, 13 May - Sun, 17 May
British Airways Logo
16:10 - 21:10
ORK
-
USM
23h 00m
2 stops
British Airways Logo
16:25 - 10:45
USM
-
ORK
24h 20m
2 stops
€1,993British Airways
Wed, 13 May - Sun, 17 May

momondo Fare Finder

 
Locate flights to Ko Samui that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 13,528 searches and data was last updated on 7 April 2026.
Use the filters below to find and compare flights to Ko Samui that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

DublinKo Samui

DUB - USM

DUBUSM

Dublin

Thu 21/5

09:00-18:00

2 stops27h 00m

Ko Samui

Thu 28/5

09:15-07:15

2 stops28h 00m

€593

DublinKo Samui

DUB - USM

DUBUSM

Dublin

Thu 7/5

09:00-17:45

2 stops26h 45m

Ko Samui

Wed 20/5

06:00-07:15

2 stops31h 15m

€609

DublinKo Samui

DUB - USM

DUBUSM

Dublin

Tue 19/5

09:00-10:45

2 stops19h 45m

Ko Samui

Tue 26/5

20:50-19:05

2 stops28h 15m

€626

DublinKo Samui

DUB - USM

DUBUSM

Dublin

Mon 18/5

09:00-20:25

2 stops29h 25m

Ko Samui

Mon 25/5

17:55-07:15

2 stops19h 20m

€635

DublinKo Samui

DUB - USM

DUBUSM

Dublin

Mon 4/5

09:00-13:10

2 stops22h 10m

Ko Samui

Mon 11/5

06:00-07:15

2 stops31h 15m

€681
Fastest return journey

DublinKo Samui

DUB - USM

DUBUSM

Dublin

Mon 27/4

18:55-21:35

2 stops20h 40m

Ko Samui

Mon 11/5

17:55-07:15

2 stops19h 20m

€705

DublinKo Samui

DUB - USM

DUBUSM

Dublin

Mon 27/4

18:55-21:35

2 stops20h 40m

Ko Samui

Mon 11/5

17:55-07:15

2 stops19h 20m

€705

CorkKo Samui

ORK - USM

ORKUSM

Cork

Thu 23/4

11:25-16:55

3 stops23h 30m

Ko Samui

Mon 27/4

14:30-10:45

3 stops26h 15m

€1,214

CorkKo Samui

ORK - USM

ORKUSM

Cork

Wed 13/5

16:10-21:10

2 stops23h 00m

Ko Samui

Sun 17/5

16:25-15:10

2 stops28h 45m

€1,866

CorkKo Samui

ORK - USM

ORKUSM

Cork

Wed 13/5

16:10-21:10

2 stops23h 00m

Ko Samui

Sun 17/5

16:25-10:45

2 stops24h 20m

€1,993

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to Ko Samui from

Ko Samui flights insights and trends

Explore insights for your Ko Samui flight to craft the best travel plan

What is the cheapest day to depart on your flight to Ko Samui?

The cheapest day to depart from Ireland to Ko Samui is on a Thursday when prices can be found for as low as €580. Flights from Ireland to Ko Samui on a Sunday will generally be more expensive and average around €746. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ko Samui?

Our data shows that the cheapest Ireland to Ko Samui flights are usually those with departure times in the afternoon. Our users have found flights to Ko Samui in the afternoon for as low as €539. In contrast, the most expensive time of day to depart to Ko Samui is at midday when prices are around €607.

Cheap Ko Samui flight deals and tips

Summary info about Ko Samui flight prices, duration and airlines

Best Round-Trip Price

€593

Fastest flight time

23h 30m

Popular in

December
The best round-trip flight price to Ko Samui from Ireland in the last 72 hours is €593 (Dublin to Ko Samui).
The fastest flight to Ko Samui from Ireland takes 23h 30m (Cork to Ko Samui).
December has the highest demand for flights to Ko Samui, with a 20% price increase on average.

Frequently asked questions about flying to Ko Samui

What is there to do in Ko Samui when it’s raining?

When planning your flight to Ko Samui, it is important to be aware that some months are not as ideal as others. Specifically, the months of January, May, or October could carry a higher chance of rain, as Ko Samui sees up to 5.1 inches (130 mm) or more. There are still things to do in Ko Samui even when it's raining, but be aware that rain is highly probable in the area. Shopping centres like Fishermans Village are very popular destinations for those visiting the Ko Samui area. Fishermans Village is a great place to go if you’re looking to spend some time inside.

When is the best time to plan a beach trip to Ko Samui?

Beaches like Chaweng Beach are most often visited during February, March, or April, as the weather is usually above 70 degrees Fahrenheit (21°C) with a low chance of rain. For those looking to visit another beach nearby, Bophut Beach is a great option in the Ko Samui area.

What is the cheapest month to fly to Ko Samui?

If you aren’t able to travel during the month of September, then book flights to Ko Samui from Ireland during April instead. Flights to Ko Samui in April, while not as cheap as those in September, still average around €823.

Is there an alternative airport near Ko Samui?

Surat Thani Airport, Nakhon Si Thammarat Airport or Chumphon Airport can be an alternative airport used for travel to Ko Samui.

When did momondo last update prices for flights to Ko Samui Airport?

Prices for flights to Ko Samui Airport are refreshed on a daily basis.

How many operators does momondo search for flights to Ko Samui Airport?

How old do you have to be to fly to Ko Samui Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel to Ko Samui Airport.

What documentation or ID do you need to fly to Ko Samui Airport?

The necessary travel and health documents for your Ko Samui Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

Why use momondo?

Why should I use momondo to find a flight deal to Ko Samui?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights to Ko Samui. Millions of users trust and use momondo every year so you are in good company.

Can I find flights to Ko Samui with flexible booking policies on momondo?

All flight searches to Ko Samui on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights to Ko Samui?

Once all potential Ko Samui flight options are in front of you momondo lets you sort and filter flights based on preferences such as airline, price and flight times, amongst many other options.

I’m not ready to book a flight to Ko Samui right now. Can momondo alert me if prices change?

Price alerts on flights to Ko Samui are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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1 adult
Thu 7/5
Thu 14/5

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