The cheapest times to fly from CNX to SFO are

  • February 19th to April 1st (except the weeks of February 26th and March 12th)
  • April 23rd to June 17th
  • August 20th to November 25th

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 CNX to SFO is mid October. Prices can be as high as $1390 for Wednesday flights during early January, or as low as $581 for Monday flights around mid October.


When to Fly to San Francisco

Flying from Chiang Mai (CNX) to San Francisco, CA (SFO) will usually cost between $668 to $1024 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid October with an average ticket price of $657. Due to high demand the most expensive time to fly is early January, with an average price of $1310. Planning your trip to low-cost times can easily save you $654 on economy flights and even more on first-class flights. Generally, any price below $772 can be considered a good price for a round-trip CNX to SFO flight.

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

CNX to SFO Flight Prices

Compared to other flights, the CNX to SFO flight is cheaper than the average and costs less than the average flight leaving from Chiang Mai. 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. Wednesdays are the most expensive days to fly to San Francisco, and Fridays are the most expensive days to return to Chiang Mai. 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 $790. Return trip prices are from the SFO to CNX 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 CNX to SFO 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 CNX to SFO? We’ve got answers.

Which airlines fly this route?

You can find 40 major airlines flying this route most often: Air Astana, 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, Hong Kong Express, JAL, KLM, Korean Air, Lufthansa, Philippine Airlines, Qantas, Qatar Airways, Shenzhen, Sichuan Airlines, Singapore Airlines, SWISS, THAI, Thai AirAsia, Thai Lion Mentari, Thai Smile, Thai Vietjet Air, United, Vietnam Airlines, Xiamen, and potentially more during busy seasons.

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

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

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

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

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

It depends on the day of the week and the date, but a typical day might have around 59 available flights from CNX to SFO.


Airport Location Info


Departing Airport

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

Return Airport

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


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.