Cheap flights from Hong Kong to Koh Samui from $239 HKG → USM
Hong Kong International Airport (HKG) → Koh Samui Airport (USM)
The cheapest return found recently is $485 with Thai Lion Air, 24 Jan 2027 – 29 Jan 2027, found 2 days ago. The cheapest one-way found recently is $239 with Emirates, 30 Jul 2027, found 2 days ago.
- Cheapest one-way found recently
- $239, found 2 days ago
- Cheapest return found recently
- $485, 24 Jan 2027 to 29 Jan 2027
- Usual return price
- $509 to $607
- Cheapest month to fly
- June 2027, return fares from $405 found in the last 7 days
- Airlines with nonstop flights
- Bangkok Airways
Return
The cheapest return fare on each of 16 departure dates is usually $509 to $607.
Cheapest return found recently
$485
24 Jan 2027 – 29 Jan 2027 · Thai Lion Air
Hong Kong International Airport (HKG) → Koh Samui Airport (USM)
Leaves 2:00 p.m. · Return leaves 7:55 a.m. · 18 h of travel, both ways together
out 1 stop, back 1 stop
found 2 days ago
Cheapest nonstop return
$694
10 Jan 2027 – 23 Jan 2027 · Bangkok Airways
Hong Kong International Airport (HKG) → Koh Samui Airport (USM)
Leaves 5:05 p.m. · Return leaves 2:55 p.m. · 6 h 45 min of travel, both ways together
out nonstop, back nonstop
found 3 days ago
Found recently, and the cheapest we hold
$485 24 Jan 2027 – 29 Jan 2027found 2 days agoSee prices for these dates
$405 5 Jun 2027 – 15 Jun 2027found 5 days agoSee prices for these dates
What have prices looked like?
Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $371 to $433.
At $485, the cheapest return found recently is above that range.
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 16 departure dates from 23 Nov to 5 Jun 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 5-night return fares leaving within 3 days of 24 Jan 2027 to compare.
Every date we hold
72 fares on 16 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 23 Nov – 23 Nov | $528 | 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 |
| 16 Dec – 18 Jan 2027 | $528 | 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 |
| 19 Dec – 20 Jan 2027 | $579 | 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 – 23 Jan 2027 | $609 | 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 |
| 26 Dec – 1 Jan 2027 | $606 | 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 |
| 5 Jan 2027 – 10 Jan 2027 | $510 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back nonstop | found 5 days ago | See prices for these dates |
| 6 Jan 2027 – 26 Jan 2027 | $507 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 7 days ago | See prices for these dates |
| 10 Jan 2027 – 23 Jan 2027 | $516 | 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 |
| 24 Jan 2027 – 29 Jan 2027 | $477 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 25 Jan 2027 – 6 Feb 2027 | $559 | THAI Airways | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 30 Jan 2027 – 9 Feb 2027 | $654 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 2 stops, back 2 stops | found 5 days ago | See prices for these dates |
| 2 Feb 2027 – 9 Feb 2027 | $610 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 2 stops | found 6 days ago | See prices for these dates |
| 3 Feb 2027 – 17 Feb 2027 | $585 | 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 |
| 4 Feb 2027 – 17 Feb 2027 | $662 | 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 |
| 21 Feb 2027 – 13 Mar 2027 | $492 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 2 stops, back 1 stop | found 5 days ago | See prices for these dates |
| 5 Jun 2027 – 15 Jun 2027 | $405 | HK Express | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
Which month looks cheapest?
June 2027 is the cheapest month — from $405.
Airlines on the cheapest dates: HK Express, THAI Airways.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$239
30 Jul 2027 · Emirates
Hong Kong International Airport (HKG) → Koh Samui Airport (USM)
Leaves 9:30 p.m. · 10 h 40 min trip
1 stop · via Suvarnabhumi Airport (BKK) · overnight connection · 6 h connection
found 2 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$239 30 Jul 2027found 2 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 43 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $144 to $239.
At $239, the cheapest one-way found recently is at the high end of that range.
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 | $239 | Emirates | Hong Kong International Airport (HKG) → Koh Samui Airport (USM) | 1 stop | found 2 days ago | Open this trip |
Airlines on the cheapest dates: Emirates.
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 24 Jan 2027 – 29 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 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 11 Nov (49 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 | $404 | $371 | Cheapest seen | 8 |
| 7–13 days | $472 | $394 | +17% | 24 |
| 14–29 days | $414 | $373 | +3% | 34 |
| 30–59 days | $471 | $392 | +17% | 47 |
| 60–89 days | $498 | $426 | +23% | 49 |
| 90–179 days | $412 | $394 | +2% | 49 |
| 180+ days | $494 | $405 | +22% | 44 |
One-way
Not enough history yet: in 43 days of one-way prices, 24 Sept to 11 Nov, 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
$421
$64 less than flying from Hong Kong
27 Feb 2027 – 4 Mar 2027 · CAN → USM · out 1 stop, back 1 stop
found 3 days ago
Macau → Koh Samui
66 km from Hong Kong
$538
$53 more than flying from Hong Kong
5 Dec – 13 Dec · MFM → USM · out 1 stop, back 1 stop
found 3 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Guangzhou → Koh Samui
129 km from Hong Kong
$196
$43 less than flying from Hong Kong
18 Jun 2027 · CAN → USM · 1 stop
found 5 days ago
Zhuhai → Koh Samui
61 km from Hong Kong
$347
$108 more than flying from Hong Kong
10 Apr 2027 · ZUH → USM · 2 stops
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 24 Jan 2027 – 29 Jan 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Hong Kong to Koh Samui?
The cheapest return found recently is $485 with Thai Lion Air, 24 Jan 2027 to 29 Jan 2027, found 2 days ago. The cheapest return we hold, of any age, is $405 with HK Express, 5 Jun 2027 to 15 Jun 2027, found 5 days ago. The cheapest return fare on each of 16 departure dates is usually $509 to $607.
How much is a one-way flight from Hong Kong to Koh Samui?
The cheapest one-way found recently is $239 with Emirates, 30 Jul 2027, found 2 days ago.
What is the cheapest month to fly from Hong Kong to Koh Samui?
June 2027 is the cheapest month for a return, from $405, 5 Jun 2027 to 15 Jun 2027, found 5 days ago.
How far ahead should I book a flight from Hong Kong to Koh Samui?
In 49 days of prices between 24 Sept and 11 Nov, return fares were cheapest 0 to 6 days before departure.
Is there a direct flight from Hong Kong to Koh Samui?
Yes, the cheapest nonstop return found recently is $694 with Bangkok Airways, 10 Jan 2027 to 23 Jan 2027, found 3 days ago.
How long is the flight from Hong Kong to Koh Samui?
The cheapest one-way found recently, with Emirates on 30 Jul 2027, takes 10 h 40 min with 1 stop, including a 6 h connection.
Which airlines have the cheapest flights from Hong Kong to Koh Samui?
Between 23 Nov and 5 Jun 2027, HK Express has the cheapest return on 15 of the 16 departure dates we hold, and THAI Airways on 1.
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