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Koh Samui to Chiang Mai USM → CNX

Koh Samui Airport (USM) → Chiang Mai International Airport (CNX)

The cheapest return found recently is $298 with Bangkok Airways, 4 Nov – 8 Nov, found yesterday. The cheapest one-way found recently is $97 with Bangkok Airways, 28 Oct, found yesterday.

Return

The cheapest return fare on each of 5 departure dates is usually $265 to $286.

Cheapest return found recently

$298

4 Nov – 8 Nov · Bangkok Airways

Koh Samui Airport (USM) → Chiang Mai International Airport (CNX)

Leaves 8:50 a.m. · Return leaves 9:00 a.m. · 24 h of travel, both ways together

out nonstop, back 1 stop

found yesterday

See prices for these datesCheck today's price

Cheapest nonstop return

None seen yet.

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Found recently, and the cheapest we hold

Cheapest found recently $298 4 Nov – 8 Novfound yesterdaySee prices for these dates

Cheapest we hold, of any age $218 4 Nov – 11 Novfound 6 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 $218 to $286.

At $298, 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 5 departure dates from 27 Oct to 10 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 4-night return fares leaving within 3 days of 4 Nov to compare.

Every date we hold

6 fares on 5 departure dates

27 Oct – 31 Oct: $286, found 5 days ago2 Nov – 8 Nov: $302, found 6 days ago4 Nov – 11 Nov: $218, found 6 days ago22 Jan 2027 – 26 Jan 2027: $266, found 5 days ago10 Mar 2027 – 13 Mar 2027: $265, found 2 days agoOctNovJanMar
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
27 Oct – 31 Oct$286Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)out nonstop, back 1 stopfound 5 days agoSee prices for these dates
2 Nov – 8 Nov$302Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)out nonstop, back 1 stopfound 6 days agoSee prices for these dates
4 Nov – 11 Nov$218Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)out nonstop, back 1 stopfound 6 days agoSee prices for these dates
22 Jan 2027 – 26 Jan 2027$266Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)out nonstop, back 1 stopfound 5 days agoSee prices for these dates
10 Mar 2027 – 13 Mar 2027$265Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)out nonstop, back 1 stopfound 2 days agoSee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $218.

October 2026From $2861 departure date27 Oct – 31 Oct · found 5 days agoSee prices for these dates
November 2026From $218Cheapest seen2 departure dates4 Nov – 11 Nov · found 6 days agoSee prices for these dates
January 2027From $2661 departure date22 Jan 2027 – 26 Jan 2027 · found 5 days agoSee prices for these datesEvery date in January 2027
March 2027From $2651 departure date10 Mar 2027 – 13 Mar 2027 · found 2 days agoSee prices for these dates

Airlines on the cheapest dates: Bangkok Airways.

One-way

The cheapest one-way fare on each of 14 departure dates is usually $101 to $141.

Cheapest one-way found recently

$97

28 Oct · Bangkok Airways

Koh Samui Airport (USM) → Chiang Mai International Airport (CNX)

Leaves 8:50 a.m. · 1 h 50 min trip

nonstop

found yesterday

Open this tripCheck today's price

Cheapest nonstop one-way

$97

28 Oct · Bangkok Airways

Koh Samui Airport (USM) → Chiang Mai International Airport (CNX)

Leaves 8:50 a.m. · 1 h 50 min trip

nonstop

found yesterday

Open this tripCheck today's price

FareTell may earn a commission when you book through a partner.

Found recently, and the cheapest we hold

Cheapest found recently $97 28 Octfound yesterdayOpen this trip

Cheapest we hold, of any age $90 4 Novfound 6 days agoOpen this trip

What have prices looked like?

Over 25 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $89 to $110.

$97, the cheapest one-way found recently, sits here in that range of $89 to $110.

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 one-way price?

Compared with the cheapest one-way fare on each of 14 departure dates from 23 Oct to 15 Jul 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 one-way fares leaving within 3 days of 28 Oct to compare.

Every date we hold

14 fares on 14 departure dates

23 Oct: $151, found 6 days ago28 Oct: $97, found yesterday4 Nov: $90, found 6 days ago9 Dec: $96, found 6 days ago2 Jan 2027: $282, found 6 days ago22 Jan 2027: $132, found 2 days ago23 Jan 2027: $172, found 2 days ago27 Jan 2027: $130, found 2 days ago28 Jan 2027: $130, found 2 days ago29 Jan 2027: $130, found 2 days ago30 Jan 2027: $132, found 2 days ago31 Jan 2027: $112, found 2 days ago10 Jul 2027: $96, found 4 days ago15 Jul 2027: $144, found 4 days agoOctNovDecJanJul
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
23 Oct$151Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)stops unknownfound 6 days agoOpen this trip
28 Oct$97Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)nonstopfound yesterdayOpen this trip
4 Nov$90Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)nonstopfound 6 days agoOpen this trip
9 Dec$96Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)nonstopfound 6 days agoOpen this trip
2 Jan 2027$282Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)1 stopfound 6 days agoOpen this trip
22 Jan 2027$132Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)nonstopfound 2 days agoOpen this trip
23 Jan 2027$172Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)nonstopfound 2 days agoOpen this trip
27 Jan 2027$130Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)nonstopfound 2 days agoOpen this trip
28 Jan 2027$130Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)nonstopfound 2 days agoOpen this trip
29 Jan 2027$130Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)nonstopfound 2 days agoOpen this trip
30 Jan 2027$132Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)nonstopfound 2 days agoOpen this trip
31 Jan 2027$112Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)nonstopfound 2 days agoOpen this trip
10 Jul 2027$96Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)nonstopfound 4 days agoOpen this trip
15 Jul 2027$144Bangkok AirwaysKoh Samui Airport (USM) → Chiang Mai International Airport (CNX)1 stopfound 4 days agoOpen this trip

Which month looks cheapest?

November 2026 is the cheapest month — from $90.

October 2026From $972 departure dates28 Oct · found yesterdayOpen this trip
November 2026From $90Cheapest seen1 departure date4 Nov · found 6 days agoOpen this trip
December 2026From $961 departure date9 Dec · found 6 days agoOpen this trip
January 2027From $1128 departure dates31 Jan 2027 · found 2 days agoOpen this tripEvery date in January 2027
July 2027From $962 departure dates10 Jul 2027 · found 4 days agoOpen this trip

Airlines on the cheapest dates: Bangkok Airways.

Premium cabin fares from Koh Samui to Chiang Mai

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 4 Nov – 8 Nov in another cabin: Premium economy · Business · First

Today's prices for 28 Oct in another cabin: Premium economy · Business · First

How far ahead were prices cheapest for Koh Samui to Chiang Mai?

Return

Fares 180 or more days before departure were typically 14% lower than 0 to 6 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
0–6 days$290$266+17%18
7–13 days$286$266+15%18
14–29 days$280$218+12%13
30–59 days$317$275+27%15
60–89 days$317$317+27%9
90–179 days$266$263+7%24
180+ days$249$249Cheapest seen7

One-way

Fares 30 to 59 days before departure were typically 19% lower than 0 to 6 days before departure.

From the cheapest one-way 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 — one way, per traveler in Economy.
Booked ahead byTypical fareCheapest dayAbove the cheapestDays of prices
0–6 days$118$107+23%7
7–13 days$119$97+24%12
14–29 days$101$89+5%16
30–59 days$96$96Cheapest seen8
60–89 days$112$90+17%16
90–179 days$110$97+15%22
180+ days$112$96+17%15

Could a nearby airport be cheaper?

A different airport at either end can change the fare — sometimes a lot.

Return

Surat Thani → Chiang Mai

94 km from Koh Samui

$202

$96 less than flying from Koh Samui

26 Nov – 28 Nov · URT → CNX · out 1 stop, back 1 stop

found yesterday

See this route

Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.

One-way

Chumphon → Chiang Mai

142 km from Koh Samui

$75

$22 less than flying from Koh Samui

30 Jan 2027 · CJM → CNX · 1 stop

found 5 days ago

Check today's price

Surat Thani → Chiang Mai

94 km from Koh Samui

$97

The same price as flying from Koh Samui

13 Dec · URT → CNX · 1 stop

found 2 days ago

See this route

Nakhon Si Thammarat → Chiang Mai

125 km from Koh Samui

$128

$31 more than flying from Koh Samui

2 Jan 2027 · NST → CNX · 1 stop

found 6 days ago

Check today's price

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 4 Nov – 8 Nov. 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