$376 Cheap Korean Air flights from San Francisco to Chiang Mai (SFO to CNX)

Find The Best Day To Fly from San Francisco to Chiang Mai

Amazing Korean Air SFO to CNX Flight Deals

The cheapest flights to Chiang Mai Intl. found within the past 7 days were $698 round trip and $376 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Sep 2 - Tue, Sep 16
SFO
San Francisco
CNX
Chiang Mai
$698 Roundtrip, found 18 hours ago
$698
Roundtrip
found 18 hours ago
Select Korean Air flight, departing Tue, Sep 2 from San Francisco to Chiang Mai, returning Tue, Sep 16, priced at $698 found 18 hours ago
Tue, Aug 12 - Tue, Aug 19
SFO
San Francisco
CNX
Chiang Mai
$700 Roundtrip, found 8 hours ago
$700
Roundtrip
found 8 hours ago
Select Korean Air flight, departing Tue, Aug 12 from San Francisco to Chiang Mai, returning Tue, Aug 19, priced at $700 found 8 hours ago
Mon, Aug 18 - Wed, Sep 3
SFO
San Francisco
CNX
Chiang Mai
$704 Roundtrip, found 4 days ago
$704
Roundtrip
found 4 days ago
Select Korean Air flight, departing Mon, Aug 18 from San Francisco to Chiang Mai, returning Wed, Sep 3, priced at $704 found 4 days ago
Mon, Aug 18 - Thu, Aug 28
SFO
San Francisco
CNX
Chiang Mai
$706 Roundtrip, found 3 days ago
$706
Roundtrip
found 3 days ago
Select Korean Air flight, departing Mon, Aug 18 from San Francisco to Chiang Mai, returning Thu, Aug 28, priced at $706 found 3 days ago
Tue, Aug 12 - Mon, Sep 15
SFO
San Francisco
CNX
Chiang Mai
$708 Roundtrip, found 3 days ago
$708
Roundtrip
found 3 days ago
Select Korean Air flight, departing Tue, Aug 12 from San Francisco to Chiang Mai, returning Mon, Sep 15, priced at $708 found 3 days ago
Tue, Aug 12 - Tue, Aug 26
SFO
San Francisco
CNX
Chiang Mai
$710 Roundtrip, found 4 days ago
$710
Roundtrip
found 4 days ago
Select Korean Air flight, departing Tue, Aug 12 from San Francisco to Chiang Mai, returning Tue, Aug 26, priced at $710 found 4 days ago

CNX From SFO Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
Viang Thapae Resort

Viang Thapae Resort

4 out of 5
per person
Aug 11 - Aug 17
just found
Roundtrip flight included
San Francisco (SFO) to Chiang Mai (CNX)
RatiLanna Riverside Spa Resort

RatiLanna Riverside Spa Resort

5 out of 5
Save 100% on your flight
per person
Aug 11 - Aug 17
just found
Roundtrip flight included
San Francisco (SFO) to Chiang Mai (CNX)
99 The Heritage Hotel

99 The Heritage Hotel

4.5 out of 5
Save 100% on your flight
per person
Aug 11 - Aug 17
just found
Roundtrip flight included
San Francisco (SFO) to Chiang Mai (CNX)
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Frequently asked questions

Can I catch a flight from San Francisco Airport to Chiang Mai Airport right now?
Make sure you go to our Covid-19 Travel Advisor to discover if there are any present quarantine requirements or travel advice reports in effect in Chiang Mai Intl. Airport (CNX) when flying from SFO.
What terminal is Korean Air at San Francisco Airport?
As soon as you're given your ticket for your Korean Air flight from San Francisco Intl. Airport (SFO) to Chiang Mai Airport, check if the terminal details are listed on it. If not, you might like to ask your carrier. They should be able to tell you exactly where you'll be flying into and out of.
Are there Korean Air non-stop flights from SFO to CNX?
Korean Air doesn't have direct flights between San Francisco Intl. Airport (SFO) and CNX, so expect to make at least one stopover. If you have time to spare between flights, enjoy a coffee while you wait for your connection.
How long is a Korean Air flight from SFO to CNX?
Life is one big, exciting journey --- and so is your flight from San Francisco Intl. Airport (SFO) to Chiang Mai Intl. Airport (CNX) with Korean Air. Taking on average 19 hours, be prepared and bring in-flight essentials like a neck pillow, a jacket and a change of clothes.
How many direct and indirect flights does Korean Air fly from SFO to CNX?
Each month, Korean Air makes the trip between San Francisco Airport and CNX approximately 17 times.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Chiang Mai Intl. Airport (CNX), please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.
Korean Air Airports
Hop on a(n) Korean Air flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ATLUSAHartsfield-Jackson Atlanta Intl.54
DTWUSADetroit Metropolitan Wayne County37
ICNKORIncheon Intl.34
GMPKORGimpo Intl.31
CJUKORJeju Intl.28
SEAUSASeattle - Tacoma Intl.25
LAXUSALos Angeles Intl.24
PUSKORGimhae14
JFKUSAJohn F. Kennedy Intl.9
ORDUSAO'Hare Intl.7

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Smile Lanna Hotel

Smile Lanna Hotel

4 out of 5
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9.6/10 Exceptional! (90 reviews)
"Property is beautiful- though our room air conditioner would not work properly so it was hot when we slept. The beds were very thin mattresses so were pretty uncomfortable but the service and staff at the resort were excellent."

Reviewed on Jul 13, 2025

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Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.