Hong Kong to Koh Samui HKG → USM
Hong Kong International Airport (HKG) → Koh Samui Airport (USM)
The cheapest return found recently is $481 with HK Express, 25 Jan 2027 – 31 Jan 2027, found today. The cheapest one-way found recently is $212 with HK Express, 30 Jul 2027, found yesterday.
Return
The cheapest return fare on each of 14 departure dates is usually $468 to $585.
Cheapest return found recently
$481
25 Jan 2027 – 31 Jan 2027 · HK Express
Hong Kong International Airport (HKG) → Koh Samui Airport (USM)
Leaves 9:40 p.m. · Return leaves 6:45 a.m. · 22 h 10 min of travel, both ways together
out 1 stop, back 1 stop
found today
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$481 25 Jan 2027 – 31 Jan 2027found todaySee prices for these dates
$404 11 Nov – 12 Novfound 2 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 $371 to $416.
At $481, 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 14 departure dates from 29 Oct to 19 Mar 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 6-night return fares leaving within 3 days of 25 Jan 2027 to compare.
Every date we hold
19 fares on 14 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 29 Oct – 4 Nov | $406 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 11 Nov – 12 Nov | $404 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 18 Dec – 5 Jan 2027 | $611 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 20 Dec – 5 Jan 2027 | $638 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 21 Dec – 13 Jan 2027 | $591 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 22 Dec – 14 Jan 2027 | $568 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 23 Dec – 13 Jan 2027 | $604 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back nonstop | found 4 days ago | See prices for these dates |
| 1 Jan 2027 – 12 Jan 2027 | $539 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found today | See prices for these dates |
| 7 Jan 2027 – 28 Jan 2027 | $551 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 10 Jan 2027 – 24 Jan 2027 | $509 | Thai Lion Air | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 19 Jan 2027 – 18 Mar 2027 | $463 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 25 Jan 2027 – 31 Jan 2027 | $481 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found today | See prices for these dates |
| 21 Feb 2027 – 13 Mar 2027 | $463 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 19 Mar 2027 – 28 Mar 2027 | $539 | THAI Airways | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found today | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $404.
Airlines on the cheapest dates: HK Express, Thai Lion Air, THAI Airways.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$212
30 Jul 2027 · HK Express
Hong Kong International Airport (HKG) → Koh Samui Airport (USM)
Leaves 9:30 a.m. · 22 h 40 min trip
1 stop
found yesterday
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$212 30 Jul 2027found yesterdayOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 23 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $203 to $230.
23 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 one-way price?
Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 30 Jul 2027 to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 30 Jul 2027 | $212 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | 1 stop | found yesterday | Open this trip |
Airlines on the cheapest dates: HK Express.
Premium cabin fares from Hong Kong 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 25 Jan 2027 – 31 Jan 2027 in another cabin: Premium economy · Business · First
Today's prices for 30 Jul 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Hong Kong 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
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $380 | $371 | +2% | 7 |
| 7–13 days | $472 | $406 | +27% | 16 |
| 14–29 days | $373 | $373 | Cheapest seen | 11 |
| 30–59 days | $397 | $392 | +6% | 24 |
| 60–89 days | $532 | $444 | +43% | 25 |
| 90–179 days | $416 | $394 | +12% | 25 |
| 180+ days | $500 | $456 | +34% | 25 |
One-way
Not enough history yet: in 23 days of one-way prices, 24 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Guangzhou → Koh Samui
129 km from Hong Kong
$505
$24 more than flying from Hong Kong
23 Dec – 19 Jan 2027 · CAN → USM · out 1 stop, back 1 stop
found today
Hong Kong → Surat Thani
94 km from Koh Samui
$396
$85 less than flying to Koh Samui
22 Dec – 30 Dec · HKG → URT · out 1 stop, back 1 stop
found 2 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Shenzhen → Koh Samui
27 km from Hong Kong
$247
$35 more than flying from Hong Kong
31 Jan 2027 · SZX → USM · 1 stop
found 5 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 25 Jan 2027 – 31 Jan 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