The cheapest times to fly from SFO to CNX are

  • February 19th to May 13th (except the week of April 9th)
  • August 20th to December 2nd

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from SFO to CNX is early September. Prices can be as high as $1582 for Friday flights during mid December, or as low as $486 for Monday flights around early September.


When to Fly to Chiang Mai

Flying from San Francisco, CA (SFO) to Chiang Mai (CNX) will usually cost between $579 to $1153 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early September with an average ticket price of $551. Due to high demand the most expensive time to fly is mid December, with an average price of $1394. Planning your trip to low-cost times can easily save you $843 on economy flights and even more on first-class flights. Generally, any price below $710 can be considered a good price for a round-trip SFO to CNX flight.

See below for a graph of average weekly prices for the SFO to CNX route. All prices are for round-trip tickets in USD.

SFO to CNX Flight Prices

Compared to other flights, the SFO to CNX flight is cheaper than the average and costs less than the average flight leaving from San Francisco. The average price per mile (for a direct flight) is $0.06, which is far below average.


Flight Prices by Day of the Week

Monday is usually the cheapest day to depart and return on this flight. Fridays are the most expensive days to fly to Chiang Mai, and Wednesdays are the most expensive days to return to San Francisco. Selecting flights on the least expensive days could save you up to $58 (7%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Monday and returning a week later will cost an average of $740. Return trip prices are from the CNX to SFO flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from SFO to CNX can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 14 hour 51 minutes may not be realistic.


Flight Questions Answered

Still have questions about flying from SFO to CNX? We’ve got answers.

Which airlines fly this route?

You can find 34 major airlines flying this route most often: Air Canada, Air China, Alaska, American, ANA, Asiana, Austrian, Bangkok Airways, Cathay Dragon, Cathay Pacific, China Airlines, China Eastern, China Southern, Delta, Emirates, Etihad, EVA Air, Hainan, Hong Kong Airlines, JAL, Korean Air, Lufthansa, Philippine Airlines, Qantas, Qatar Airways, Singapore Airlines, SWISS, THAI, Thai AirAsia, Thai Lion Mentari, Thai Smile, Thai Vietjet Air, United, Vietnam Airlines, and potentially more during busy seasons.

How far away is it from Chiang Mai International Airport to San Francisco International Airport?

The distance between the two airports is roughly 7703 miles or 12397 kilometers.

How long does it take to fly from SFO to CNX?

The real-world flight time for a nonstop SFO to CNX flight is about 14 hour 51 minutes.

How many flights go between San Francisco, CA and Chiang Mai?

It depends on the day of the week and the date, but a typical day might have around 82 available flights from SFO to CNX.


Airport Location Info


Departing Airport

Origination code SFO
Origination airport name San Francisco International Airport
City San Francisco, CA
Country the United States
Latitude 37.6
Longitude -122.4

Return Airport

Destination code CNX
Destination airport name Chiang Mai International Airport
City Chiang Mai
Country Thailand
Latitude 18.8
Longitude 99


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.