San Francisco (SFO) to Chiang Mai (CNX) is 12,400 km in a straight line, the equivalent of about 16h in the air; we have not seen a nonstop fare on this pair. The lowest one-way fare seen recently was $401 with Korean Air (1 stop), departing 7 Dec 2026 — as of 8 Oct 2026.

Check fares, see which airlines fly this route, and sort out airports, visas, and what to do at the destination — all before you book.

Plan your trip

See today's SFO–CNX fares on Trip.com

Opens the San Francisco to Chiang Mai route, ready to pick a date.

When you land in Chiang Mai

Sort the airport transfer and pick a few things to do so you hit the ground running.

Getting out of Chiang Mai (CNX)

Skip the taxi rank and lock in your fare before you land.

Pre-book a fixed-price transfer

Our pick

Driver waits at arrivals with your name, tracks your flight, and the price you see is the price you pay. English-speaking, fixed price. No surge, no haggling at 2am.

Check transfer prices Renting a car instead? Compare rentals with free cancellation.

Things to do in Chiang Mai

Lock in a few experiences before you go — the good ones sell out.

Tours, tickets & day trips

Our pick

GetYourGuide has the deepest catalogue for Chiang Mai and free cancellation on most experiences — book now, decide later.

Browse Chiang Mai Just need timed-entry attraction tickets in Chiang Mai? Try Tiqets.Want a private driver-guide? Trip.com Private Tours in Chiang Mai.

Flights SFO → CNX

Compare live fares from San Francisco to Chiang Mai across 750+ airlines.

Search flights

Or compare fares on Expedia Bundle flight + hotel on Trip.com

Find hotels in Chiang Mai

Hotels, hostels & more · Trip.com

Search hotels

Why travelers watch this route

Fares seen

The lowest one-way fare seen was $401 with Korean Air (1 stop), departing 7 Dec 2026. Checked 8 Oct 2026 — fares move daily.

Seasonality

Chiang Mai demand usually strengthens around November – February, which can push fares higher on this corridor.

Who flies it

We have not confirmed a nonstop carrier on SFO–CNX; most travellers connect through a hub.

Airlines flying San Francisco to Chiang Mai

We have not confirmed which airlines fly SFO–CNX nonstop. Search the route to see every carrier selling it today, including connections.

Best time to fly to Chiang Mai

Based on weather and travel conditions in Thailand

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Best monthsGoodAvoid if possible

The cool, dry season (November–February) is ideal — sunny skies, low humidity, and comfortable temperatures around 25–30°C. The monsoon (May–October) brings heavy rain especially in the south.

Peak season: November – February

Direct & Connecting Flights

We have not seen a nonstop fare between San Francisco (SFO) and Chiang Mai (CNX), so most itineraries connect through a hub.

Fares & Price Guide

The lowest one-way fare seen on SFO–CNX was $401 USD (1 stop) as of 8 Oct 2026. Set a fare alert to be told when it drops.

About Chiang Mai, Thailand

Flights arrive at Chiang Mai International Airport (CNX). Best visited during November – February. See the destination guide for hotels, visa requirements and travel tips.

Plan this route beyond the fare

Use the wider AirConnect network to move from a route check into airports, airlines, visa, and trip planning.

Search SFO → CNX

See current San Francisco to Chiang Mai fares on Trip.com.

Airport Guides

Check terminals, transport and arrival details for SFO and CNX.

Airline Route Maps

Explore the networks of airlines flying from San Francisco and Chiang Mai.

Chiang Mai Planning

Turn this flight route into a full trip with destination, hotel and activity planning.

Price Alerts

Track fare drops on SFO–CNX and related city pairs.

Visa Guides

Check entry rules before booking flights from San Francisco to Thailand.

Explore related route clusters

More routes in this part of the world.

USA routes

Browse more routes from the San Francisco side of this corridor.

Thailand routes

See how Chiang Mai connects into its wider route market.

All routes A–Z

Explore more city-pair corridors across the wider AirConnect network.

Frequently asked questions — San Francisco to Chiang Mai flights

How long is the flight from San Francisco to Chiang Mai?

San Francisco (SFO) and Chiang Mai (CNX) are 12,400 km apart, about 16h of flying time. We have not seen a nonstop fare on this pair, so expect to connect — the cheapest itinerary seen had 1 stop, which adds to the total journey time.

How far is San Francisco from Chiang Mai by air?

The great-circle distance between San Francisco International Airport and Chiang Mai International Airport is 12,400 km (7,705 miles), a ultra long-haul route.

How much does a flight from San Francisco to Chiang Mai cost?

The lowest one-way fare seen recently on SFO–CNX was $401 USD with Korean Air (1 stop), departing 7 Dec 2026, found in fare searches as of 8 Oct 2026. Fares change constantly and depend on the date, so check the current price before booking.

Do I need a visa to travel from San Francisco to Thailand?

It depends on your passport. Some nationalities can enter Thailand visa-free or get a visa on arrival; others must apply in advance. Use AirConnect's Visa Checker to see the rules for your passport.

What is the best time to visit Chiang Mai?

Sources: fares from Travelpayouts flight-search data, seen 8 Oct 2026; airlines from each carrier's published network and nonstop fares on sale; distance from OurAirports coordinates; flight time estimated from distance. Fares change daily.

Ready to book SFO–CNX?

Set a fare alert, check your visa, or search flights now.

🔔 Fare alert for SFO–CNX 🌍 Check visa requirements ⚡ Connection risk checker