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Cheap Flights from Seattle / Tacoma International to Chiang Mai

Compare Seattle / Tacoma International to Chiang Mai flight deals

Find the cheapest month or even day of the year to fly to Chiang Mai

Book the best Chiang Mai fare with no extra fees

Flight deals from Seattle / Tacoma International to Chiang Mai

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International Airport to Chiang Mai Airport? If you want to travel next month, return fares start from Rs365,284. Find the lowest prices on one-way and return tickets right here.
Chiang Mai.Rs133,713 per passenger.Departing Sat, 19 Sep.One-way flight with Hainan Airlines.Outbound indirect flight with Hainan Airlines, departs from Seattle / Tacoma International on Sat, 19 Sep, arriving in Chiang Mai.Price includes taxes and charges.From Rs133,713, select.
Chiang Mai.Rs145,375 per passenger.Departing Tue, 12 Jan.One-way flight with Korean Air.Outbound indirect flight with Korean Air, departs from Seattle / Tacoma International on Tue, 12 Jan, arriving in Chiang Mai.Price includes taxes and charges.From Rs145,375, select.
Chiang Mai.Rs145,649 per passenger.Departing Mon, 4 May.One-way flight with Asiana Airlines.Outbound indirect flight with Asiana Airlines, departs from Seattle / Tacoma International on Mon, 4 May, arriving in Chiang Mai.Price includes taxes and charges.From Rs145,649, select.
Chiang Mai.Rs147,082 per passenger.Departing Mon, 24 Aug.One-way flight with Asiana Airlines.Outbound indirect flight with Asiana Airlines, departs from Seattle / Tacoma International on Mon, 24 Aug, arriving in Chiang Mai.Price includes taxes and charges.From Rs147,082, select.
Chiang Mai.Rs155,283 per passenger.Departing Sun, 19 Jul.One-way flight with Korean Air.Outbound indirect flight with Korean Air, departs from Seattle / Tacoma International on Sun, 19 Jul, arriving in Chiang Mai.Price includes taxes and charges.From Rs155,283, select.
Chiang Mai.Rs156,811 per passenger.Departing Mon, 2 Nov.One-way flight with Korean Air.Outbound indirect flight with Korean Air, departs from Seattle / Tacoma International on Mon, 2 Nov, arriving in Chiang Mai.Price includes taxes and charges.From Rs156,811, select.
Chiang Mai.Rs184,503 per passenger.Departing Sat, 26 Dec.One-way flight with Asiana Airlines.Outbound indirect flight with Asiana Airlines, departs from Seattle / Tacoma International on Sat, 26 Dec, arriving in Chiang Mai.Price includes taxes and charges.From Rs184,503, select.
Chiang Mai.Rs184,735 per passenger.Departing Wed, 10 Jun.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Seattle / Tacoma International on Wed, 10 Jun, arriving in Chiang Mai.Price includes taxes and charges.From Rs184,735, select.

Find the cheapest month to fly from Seattle / Tacoma International to Chiang Mai

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle / Tacoma International to Chiang Mai flights are currently cheapest in September.
May
from Rs145,649
Jun
from Rs184,735
Jul
from Rs155,283
Aug
from Rs147,082
Sep
from Rs133,713
Oct
Find prices
Nov
from Rs156,811
Dec
from Rs184,503
Jan
from Rs145,375
Feb
Find prices
Mar
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Apr
Find prices

Seattle / Tacoma International to Chiang Mai: Alternative routes

Compare routes from Seattle / Tacoma International to Chiang Mai below. You may find an airport to fly into that's cheaper, faster, or easier than Chiang Mai.

Chiang Mai

4km from central Chiang Mai
ClosestCheapest
from Rs133,713
Search flights

Lampang

79km from central Chiang Mai
from Rs161,019
Search flights

Seattle to Chiang Mai: Flight information

The things to know before you go.
Cheapest flight foundRs133,713
Cheapest month to flySeptember

Finding cheap flights from Seattle / Tacoma International to Chiang Mai: Frequently asked questions

The best price we found for a return flight from Seattle / Tacoma International to Chiang Mai is Rs261,350. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Seattle / Tacoma International to Chiang Mai. But we found flights with one or more stops from Rs261,350.
As of May 2026, there are no flights flying from Seattle / Tacoma International to Chiang Mai.
The cheapest month to fly from Seattle / Tacoma International to Chiang Mai is usually October.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Chiang Mai Airport on Thursday, 1 October 2026.
No airlines currently offer direct flights between Seattle / Tacoma International Airport and Chiang Mai Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Chiang Mai but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Chiang Mai is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Singapore Airlines offers the cheapest flight tickets to Chiang Mai.

Travelling from Seattle-Tacoma International Airport (SEA) to Chiang Mai International Airport (CNX): what you need to know

  • Chiang Mai's timezone is UTC+7, making Chiang Mai 14 hours ahead of Seattle.

  • Arrive at the airport on time so you don't miss your SEA to CNX flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid the stress of rushing.

  • During popular months such as July, you'll want to get to the airport earlier than usual. Arrive two hours before a domestic departure and four hours ahead for international flights when you travel during a peak period in general.

  • If you want to add a stop to your trip, simply deselect 'Direct flights only' when searching for your ticket from Seattle-Tacoma International Airport to Chiang Mai International Airport. Here are the top stopovers between SEA and CNX:

    • Taiwan Taoyuan International Airport

    • Incheon International Airport

    • Shanghai Pudong International Airport

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to Chiang Mai International Airport (CNX)

  • The cheapest price we've seen for a one-way Seattle-Tacoma International Airport to Chiang Mai International Airport flight is Rs133,713. A round-trip fare right now is Rs261,350. Depending on the availability and when you book, these fares could change.

  • Don't leave everything to the last moment. You're more likely to find cheap tickets from SEA to CNX if you book early. Airlines often have some terrific early bird rates.

  • The 'Whole month' tool shows you the cheapest flights from Seattle-Tacoma International Airport to Chiang Mai International Airport across every month. It's a great way to snap up a bargain if your dates are flexible.

  • Landing cheap flights from SEA to CNX is a piece of cake with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you when a new discounted fare appears.

  • Tailor your trip using filters. Select your arrival and departure times, total journey duration and airlines. You can also sort the results by 'Fastest,' 'Best' or 'Cheapest' flights from Seattle-Tacoma International Airport to Chiang Mai International Airport.

Handy information about Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport has an excellent on-time performance, reducing your chances of a delayed flight. Departures from SEA arrive at their destination as scheduled 81.27% of the time.

  • Seattle-Tacoma International Airport is around 23 kilometres from central Seattle. If you're catching a cab, ride-sharing or driving from the centre, it'll take you 20 minutes or so to arrive, depending on the traffic.

  • The trip when using public transport usually takes 55 minutes.

  • Catching an early flight from Seattle-Tacoma International Airport to Chiang Mai International Airport? Avoid rushing to the airport (and catch some extra z's) by picking one of these hotels near SEA:

Arriving at Chiang Mai International Airport (CNX)

Getting from Chiang Mai International Airport (CNX) to central Chiang Mai

  • Chiang Mai International Airport is roughly 5 kilometres from the centre of Chiang Mai. The drive time takes about 10 minutes.

  • It takes roughly 25 minutes if you're travelling by public transport.

When to fly to Chiang Mai International Airport (CNX)

  • August is the most popular month for flights from Seattle-Tacoma International Airport to Chiang Mai International Airport. To skip the crowds, travel to Chiang Mai in February.

  • Before locking in your flight from Seattle-Tacoma International Airport to Chiang Mai International Airport, consider the kind of weather you enjoy. April is the warmest month in Chiang Mai, with the temperature ranging from 22ºC to 42ºC.

  • January has average temperatures of between 12ºC and 31ºC. Look for cheap tickets from SEA to CNX around that time if you like travelling in cooler conditions.

Explore more of Thailand

  • You've visited Chiang Mai, now it's time to discover other corners of Thailand. Journey around 434 kilometres east to Udon Thani to check off its popular sights. From Nong Prajak Public Park to Krom Luang Prachaksinlapakhom Monument and Chinesisches Tor, there's plenty to keep you on the go.

  • Around 80 kilometres south-east of Chiang Mai, Lampang is another favourite stop in Thailand. No visit is complete without checking out Baan Sao Nak, Ratsadapisek Bridge and Horse-Drawn Carriage.

Plan the rest of your trip from Seattle to Chiang Mai

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.