Skyscanner home

Cheap flight tickets from Portland to Chiang Mai

Compare Portland 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 Portland Airport to Chiang Mai Airport

Looking for a cheap last-minute deal or the best return flight from Portland Airport to Chiang Mai Airport? If you want to travel next month, return fares start from RM3,960. Find the lowest prices on one-way and return tickets right here.
Chiang Mai.RM3,345 per passenger.Departing Tue, 13 Oct, returning Tue, 20 Oct.Return flight with Alaska Airlines and China Airlines.Outbound indirect flight with Alaska Airlines, departs from Portland on Tue, 13 Oct, arriving in Chiang Mai.Inbound indirect flight with China Airlines, departs from Chiang Mai on Tue, 20 Oct, arriving in Portland.Price includes taxes and charges.From RM3,345, select.
Chiang Mai.RM3,549 per passenger.Departing Mon, 4 May, returning Wed, 13 May.Return flight with Alaska Airlines and China Airlines.Outbound indirect flight with Alaska Airlines, departs from Portland on Mon, 4 May, arriving in Chiang Mai.Inbound indirect flight with China Airlines, departs from Chiang Mai on Wed, 13 May, arriving in Portland.Price includes taxes and charges.From RM3,549, select.
Chiang Mai.RM3,960 per passenger.Departing Tue, 21 Apr, returning Tue, 28 Apr.Return flight with Alaska Airlines and EVA Air.Outbound indirect flight with Alaska Airlines, departs from Portland on Tue, 21 Apr, arriving in Chiang Mai.Inbound indirect flight with EVA Air, departs from Chiang Mai on Tue, 28 Apr, arriving in Portland.Price includes taxes and charges.From RM3,960, select.
Chiang Mai.RM5,812 per passenger.Departing Mon, 22 Jun, returning Fri, 10 Jul.Return flight with Alaska Airlines and China Airlines.Outbound indirect flight with Alaska Airlines, departs from Portland on Mon, 22 Jun, arriving in Chiang Mai.Inbound indirect flight with China Airlines, departs from Chiang Mai on Fri, 10 Jul, arriving in Portland.Price includes taxes and charges.From RM5,812, select.
Chiang Mai.RM5,839 per passenger.Departing Mon, 25 May, returning Mon, 8 Jun.Return flight with Alaska Airlines and China Airlines.Outbound indirect flight with Alaska Airlines, departs from Portland on Mon, 25 May, arriving in Chiang Mai.Inbound indirect flight with China Airlines, departs from Chiang Mai on Mon, 8 Jun, arriving in Portland.Price includes taxes and charges.From RM5,839, select.

Find the cheapest month to fly from Portland to Chiang Mai

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Portland to Chiang Mai flights are currently cheapest in October.
Mar
Find prices
Apr
from RM3,960
May
from RM3,549
Jun
Find prices
Jul
Find prices
Aug
Find prices
Sep
Find prices
Oct
from RM3,345
Nov
Find prices
Dec
Find prices
Jan
Find prices
Feb
Find prices

Portland to Chiang Mai: Alternative routes

Compare routes from Portland 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 RM3,345
Search flights

Lampang

79km from central Chiang Mai
Search flights

Portland to Chiang Mai: Flight information

The things to know before you go.
Cheapest flight foundRM3,345
Cheapest month to flyOctober

Finding cheap flights from Portland to Chiang Mai: Frequently asked questions

The best price we found for a return flight from Portland to Chiang Mai is RM3,345. 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 Portland to Chiang Mai. But we found flights with one or more stops from RM3,345.
As of March 2026, there are no flights flying from Portland to Chiang Mai.
The cheapest month to fly from Portland to Chiang Mai is usually October.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Portland Airport to Chiang Mai Airport on Tuesday, 13 October 2026.
No airlines currently offer direct flights between Portland 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, Alaska Airlines offers the cheapest flight tickets to Chiang Mai.

Flying from Portland International Airport (PDX) to Chiang Mai International Airport (CNX): what you need to know

  • Chiang Mai is 14 hours ahead of Portland and observes the UTC+7 timezone.

  • Leave plenty of time to make your PDX to CNX flight. As a general rule, arrive two hours before international departures and an hour ahead for domestic flights.

  • Flying during a peak time like July? School holidays and other popular seasons can mean longer lines at security. Play things extra safe and get there up to four hours ahead of an international flight and two hours before a domestic departure.

How to find the cheapest flights from Portland International Airport (PDX) to Chiang Mai International Airport (CNX)

  • The cheapest price we've seen for a one-way Portland International Airport to Chiang Mai International Airport flight is RM1,981. A return plane ticket right now is RM3,345. Depending on the availability and when you book, these fares may change.

  • Don't wait until the last minute. You're more likely to find cheap tickets from PDX to CNX if you book early. Airlines often offer some fantastic early bird deals.

  • Finding cheap flights from Portland International Airport to Chiang Mai International Airport is easier if you're flexible with your travel dates. Use the 'Whole month' search tool to see the lowest fares across the month and score a great deal.

  • Spend less time searching for cheap flights from PDX to CNX by creating a Price Alert. We'll send you an email or notification on the app when a lower fare pops up.

  • Choose your ideal arrival and departure times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from Portland International Airport to Chiang Mai International Airport.

Handy information about Portland International Airport (PDX)

  • PDX is located at 7000 NE Airport Way.

  • Portland International Airport earns top marks for its on-time performance. 83.65% of flights that take off from PDX arrive at their destination without delay.

  • Portland International Airport is about 19 kilometres from central Portland. If you're ride-sharing, catching a cab or driving from the centre, it'll take 20 minutes or so to get there, depending on the traffic.

  • Planning to take public transport? You can expect a journey time of around 45 minutes.

  • Get your travels off to a hassle-free start by staying near PDX. Whether you're taking an early flight from Portland International Airport to Chiang Mai International Airport or just don't like being rushed, these hotels are perfect:

Arriving at Chiang Mai International Airport (CNX)

  • If you're coming in on a late Portland International Airport to Chiang Mai International Airport flight, nothing beats the convenience of staying near the terminal. Grab your suitcases from the carousel and then be showered and snoozing not long after at one of these hotels near CNX:

  • Follow your own route with a Chiang Mai International Airport rental car. Pick up a set of wheels from Chic Car Rent, asap car hire or Hertz and find adventure across Chiang Mai and beyond.

  • Booking your vehicle from Chiang Mai International Airport around two weeks in advance gives you the best shot at securing a great deal.

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

  • Chiang Mai International Airport to the centre of Chiang Mai has a drive time of around 10 minutes. It's approximately 5 kilometres away.

  • If you're travelling by public transport, expect a journey of roughly 25 minutes.

When to fly to Chiang Mai International Airport (CNX)

  • The quietest month for a flight from Portland International Airport to Chiang Mai International Airport is February, while August is the most popular. Choose the best time to visit Chiang Mai based on whether you prefer a more fast-paced or easygoing experience.

  • Book your flight from Portland International Airport to Chiang Mai International Airport for April if you'd like to visit Chiang Mai during its warmest month. Expect temperatures of between 22ºC (72ºF) and 42ºC (108ºF).

  • For cooler conditions, look for a cheap ticket from PDX to CNX in January. Temperatures average between 12ºC (54ºF) and 31ºC (88ºF) then.

Explore more of Thailand

  • Chiang Mai has loads to offer, but there are so many other corners of Thailand you should also see. Around 434 kilometres east of Chiang Mai, a visit to Udon Thani will keep your itinerary busy. Check out popular attractions like Nong Prajak Public Park, Krom Luang Prachaksinlapakhom Monument and Chinesisches Tor.

  • Around 80 kilometres south-east of Chiang Mai, Lampang is another favourite stop in Thailand. Start your sightseeing at Baan Sao Nak, Ratsadapisek Bridge and Horse-Drawn Carriage.

Plan the rest of your trip from Portland to Chiang Mai

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