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Singapore to Koh Samui SIN → USM

Changi International Airport (SIN) → Koh Samui Airport (USM)

The cheapest return found recently is $302 with Scoot, 19 Apr 2027 – 7 May 2027, found yesterday.

Return

The cheapest return fare on each of 17 departure dates is usually $339 to $431.

Cheapest return found recently

$302

19 Apr 2027 – 7 May 2027 · Scoot

Changi International Airport (SIN) → Koh Samui Airport (USM)

Leaves 7:00 a.m. · Return leaves 8:40 a.m. · 3 h 40 min of travel, both ways together

out nonstop, back nonstop

found yesterday

See prices for these datesCheck today's price

Cheapest nonstop return

$302

19 Apr 2027 – 7 May 2027 · Scoot

Changi International Airport (SIN) → Koh Samui Airport (USM)

Leaves 7:00 a.m. · Return leaves 8:40 a.m. · 3 h 40 min of travel, both ways together

out nonstop, back nonstop

found yesterday

See prices for these datesCheck today's price

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Found recently, and the cheapest we hold

Cheapest found recently $302 19 Apr 2027 – 7 May 2027found yesterdaySee prices for these dates

Cheapest we hold, of any age $296 23 Nov – 30 Novfound 4 days agoSee prices for these dates

What have prices looked like?

Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $270 to $300.

At $302, the cheapest return found recently is above that range.

25 days is a short history, so treat this range as an early guide.

Those were the prices on those days, not today's.

Is this a good return price?

Compared with the cheapest return fare on each of 17 departure dates from 23 Nov to 25 Apr 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.

Could nearby dates be cheaper?

We hold no other 18-night return fares leaving within 3 days of 19 Apr 2027 to compare.

Every date we hold

18 fares on 17 departure dates

23 Nov – 30 Nov: $296, found 4 days ago10 Dec – 20 Dec: $300, found 6 days ago11 Dec – 22 Jan 2027: $389, found 6 days ago12 Dec – 20 Jan 2027: $339, found 6 days ago22 Dec – 24 Dec: $471, found 6 days ago30 Dec – 9 Jan 2027: $495, found 2 days ago2 Jan 2027 – 14 Jan 2027: $446, found 4 days ago5 Jan 2027 – 18 Jan 2027: $381, found 3 days ago6 Jan 2027 – 17 Jan 2027: $360, found 3 days ago11 Jan 2027 – 27 Jan 2027: $431, found 6 days ago14 Jan 2027 – 4 Feb 2027: $397, found 5 days ago27 Jan 2027 – 5 Feb 2027: $396, found 5 days ago1 Feb 2027 – 13 Feb 2027: $458, found 3 days ago8 Mar 2027 – 20 Mar 2027: $373, found 5 days ago9 Mar 2027 – 20 Mar 2027: $373, found 5 days ago19 Apr 2027 – 7 May 2027: $302, found yesterday25 Apr 2027 – 6 May 2027: $307, found yesterdayDecJanMarApr
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
23 Nov – 30 Nov$296ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 4 days agoSee prices for these dates
10 Dec – 20 Dec$300ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
11 Dec – 22 Jan 2027$389ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
12 Dec – 20 Jan 2027$339ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
22 Dec – 24 Dec$471ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 6 days agoSee prices for these dates
30 Dec – 9 Jan 2027$495Thai Lion AirChangi International Airport (SIN) → Koh Samui Airport (USM)out 1 stop, back nonstopfound 2 days agoSee prices for these dates
2 Jan 2027 – 14 Jan 2027$446AirAsiaChangi International Airport (SIN) → Koh Samui Airport (USM)out 2 stops, back nonstopfound 4 days agoSee prices for these dates
5 Jan 2027 – 18 Jan 2027$381ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
6 Jan 2027 – 17 Jan 2027$360ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
11 Jan 2027 – 27 Jan 2027$431Thai Lion AirChangi International Airport (SIN) → Koh Samui Airport (USM)out 1 stop, back nonstopfound 6 days agoSee prices for these dates
14 Jan 2027 – 4 Feb 2027$397Bangkok AirwaysChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
27 Jan 2027 – 5 Feb 2027$396Bangkok AirwaysChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
1 Feb 2027 – 13 Feb 2027$458ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 3 days agoSee prices for these dates
8 Mar 2027 – 20 Mar 2027$373ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
9 Mar 2027 – 20 Mar 2027$373ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound 5 days agoSee prices for these dates
19 Apr 2027 – 7 May 2027$302ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound yesterdaySee prices for these dates
25 Apr 2027 – 6 May 2027$307ScootChangi International Airport (SIN) → Koh Samui Airport (USM)out nonstop, back nonstopfound yesterdaySee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $296.

November 2026From $296Cheapest seen1 departure date23 Nov – 30 Nov · found 4 days agoSee prices for these dates
December 2026From $3005 departure dates10 Dec – 20 Dec · found 6 days agoSee prices for these dates
January 2027From $3606 departure dates6 Jan 2027 – 17 Jan 2027 · found 3 days agoSee prices for these dates
February 2027From $4581 departure date1 Feb 2027 – 13 Feb 2027 · found 3 days agoSee prices for these dates
March 2027From $3732 departure dates8 Mar 2027 – 20 Mar 2027 · found 5 days agoSee prices for these dates
April 2027From $3022 departure dates19 Apr 2027 – 7 May 2027 · found yesterdaySee prices for these dates

Airlines on the cheapest dates: Scoot, Thai Lion Air, Bangkok Airways, AirAsia.

Premium cabin fares from Singapore to Koh Samui

We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.

Today's prices for 19 Apr 2027 – 7 May 2027 in another cabin: Premium economy · Business · First

How far ahead were prices cheapest for Singapore to Koh Samui?

Return

The cheapest fares were 14 to 29 days before departure.

From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

See these ranges as a table
Typical price in each booking range — round trip, per traveler in Economy.
Booked ahead byTypical fareCheapest dayAbove the cheapestDays of prices
14–29 days$295$288Cheapest seen19
30–59 days$296$270+0%20
60–89 days$431$315+46%21
90–179 days$300$277+2%25
180+ days$323$302+10%24

Live price for these dates

The cheapest return found recently is for 19 Apr 2027 – 7 May 2027. A live search on this page shows what those dates cost now, for one adult in economy.

Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work