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973 € Cheap Flights from Portland to Chiang Mai

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      Travellers and cabin class, 1 Adult, Economy

      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 to Chiang Mai

      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 973 €. Find the lowest prices on one-way and return tickets right here.
      Chiang Mai.973 € per passenger.Departing Sat, 22 Aug, returning Sat, 29 Aug.Return flight with Frontier Airlines and Cathay Pacific.Outbound indirect flight with Frontier Airlines, departs from Portland on Sat, 22 Aug, arriving in Chiang Mai.Inbound indirect flight with Cathay Pacific, departs from Chiang Mai on Sat, 29 Aug, arriving in Portland.Price includes taxes and charges.From 973 €, select.
      Chiang Mai.1.007 € per passenger.Departing Mon, 5 Oct, returning Thu, 15 Oct.Return flight with Alaska Airlines and STARLUX Airlines.Outbound indirect flight with Alaska Airlines, departs from Portland on Mon, 5 Oct, arriving in Chiang Mai.Inbound indirect flight with STARLUX Airlines, departs from Chiang Mai on Thu, 15 Oct, arriving in Portland.Price includes taxes and charges.From 1.007 €, select.
      Chiang Mai.1.037 € per passenger.Departing Thu, 6 Aug, returning Sat, 26 Sep.Return flight with Frontier Airlines and Thai VietJet Air.Outbound indirect flight with Frontier Airlines, departs from Portland on Thu, 6 Aug, arriving in Chiang Mai.Inbound indirect flight with Thai VietJet Air, departs from Chiang Mai on Sat, 26 Sep, arriving in Portland.Price includes taxes and charges.From 1.037 €, select.
      Chiang Mai.1.046 € per passenger.Departing Tue, 8 Sep, returning Thu, 17 Sep.Return flight with Alaska Airlines and Cathay Pacific.Outbound indirect flight with Alaska Airlines, departs from Portland on Tue, 8 Sep, arriving in Chiang Mai.Inbound indirect flight with Cathay Pacific, departs from Chiang Mai on Thu, 17 Sep, arriving in Portland.Price includes taxes and charges.From 1.046 €, select.
      Chiang Mai.1.048 € per passenger.Departing Tue, 27 Oct, returning Tue, 10 Nov.Return flight with Alaska Airlines and Thai AirAsia.Outbound indirect flight with Alaska Airlines, departs from Portland on Tue, 27 Oct, arriving in Chiang Mai.Inbound indirect flight with Thai AirAsia, departs from Chiang Mai on Tue, 10 Nov, arriving in Portland.Price includes taxes and charges.From 1.048 €, select.
      Chiang Mai.1.062 € per passenger.Departing Fri, 31 Jul, returning Sat, 26 Sep.Return flight with Alaska Airlines and Nok Air.Outbound indirect flight with Alaska Airlines, departs from Portland on Fri, 31 Jul, arriving in Chiang Mai.Inbound indirect flight with Nok Air, departs from Chiang Mai on Sat, 26 Sep, arriving in Portland.Price includes taxes and charges.From 1.062 €, select.
      Chiang Mai.1.072 € per passenger.Departing Mon, 17 Aug, returning Sat, 17 Oct.Return flight with Frontier Airlines and STARLUX Airlines.Outbound indirect flight with Frontier Airlines, departs from Portland on Mon, 17 Aug, arriving in Chiang Mai.Inbound indirect flight with STARLUX Airlines, departs from Chiang Mai on Sat, 17 Oct, arriving in Portland.Price includes taxes and charges.From 1.072 €, select.
      Chiang Mai.1.076 € per passenger.Departing Fri, 6 Nov, returning Fri, 20 Nov.Return flight with Frontier Airlines and Thai VietJet Air.Outbound indirect flight with Frontier Airlines, departs from Portland on Fri, 6 Nov, arriving in Chiang Mai.Inbound indirect flight with Thai VietJet Air, departs from Chiang Mai on Fri, 20 Nov, arriving in Portland.Price includes taxes and charges.From 1.076 €, select.
      Chiang Mai.1.086 € per passenger.Departing Tue, 20 Oct, returning Tue, 23 Mar.Return flight with Alaska Airlines and Thai VietJet Air.Outbound indirect flight with Alaska Airlines, departs from Portland on Tue, 20 Oct, arriving in Chiang Mai.Inbound indirect flight with Thai VietJet Air, departs from Chiang Mai on Tue, 23 Mar, arriving in Portland.Price includes taxes and charges.From 1.086 €, select.
      Chiang Mai.1.092 € per passenger.Departing Sat, 9 Jan, returning Sun, 28 Feb.Return flight with Alaska Airlines and China Airlines.Outbound indirect flight with Alaska Airlines, departs from Portland on Sat, 9 Jan, arriving in Chiang Mai.Inbound indirect flight with China Airlines, departs from Chiang Mai on Sun, 28 Feb, arriving in Portland.Price includes taxes and charges.From 1.092 €, select.
      Chiang Mai.1.117 € per passenger.Departing Fri, 15 Jan, returning Sat, 23 Jan.Return flight with Alaska Airlines and China Airlines.Outbound indirect flight with Alaska Airlines, departs from Portland on Fri, 15 Jan, arriving in Chiang Mai.Inbound indirect flight with China Airlines, departs from Chiang Mai on Sat, 23 Jan, arriving in Portland.Price includes taxes and charges.From 1.117 €, select.
      Chiang Mai.1.152 € per passenger.Departing Mon, 1 Feb, returning Sat, 13 Feb.Return flight with Alaska Airlines and Korean Air.Outbound indirect flight with Alaska Airlines, departs from Portland on Mon, 1 Feb, arriving in Chiang Mai.Inbound indirect flight with Korean Air, departs from Chiang Mai on Sat, 13 Feb, arriving in Portland.Price includes taxes and charges.From 1.152 €, select.
      Chiang Mai.1.156 € per passenger.Departing Thu, 3 Dec, returning Wed, 3 Mar.Return flight with Alaska Airlines and EVA Air.Outbound indirect flight with Alaska Airlines, departs from Portland on Thu, 3 Dec, arriving in Chiang Mai.Inbound indirect flight with EVA Air, departs from Chiang Mai on Wed, 3 Mar, arriving in Portland.Price includes taxes and charges.From 1.156 €, select.
      Chiang Mai.1.200 € per passenger.Departing Sat, 28 Nov, returning Tue, 1 Dec.Return flight with Alaska Airlines and Thai AirAsia.Outbound indirect flight with Alaska Airlines, departs from Portland on Sat, 28 Nov, arriving in Chiang Mai.Inbound indirect flight with Thai AirAsia, departs from Chiang Mai on Tue, 1 Dec, arriving in Portland.Price includes taxes and charges.From 1.200 €, select.
      Chiang Mai.1.837 € per passenger.Departing Mon, 21 Dec, returning Fri, 1 Jan.Return flight with Alaska Airlines and Nok Air.Outbound indirect flight with Alaska Airlines, departs from Portland on Mon, 21 Dec, arriving in Chiang Mai.Inbound indirect flight with Nok Air, departs from Chiang Mai on Fri, 1 Jan, arriving in Portland.Price includes taxes and charges.From 1.837 €, 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 August.
      Jul
      Find prices
      Aug
      from 973 €
      Sep
      from 1.046 €
      Oct
      from 1.007 €
      Nov
      from 1.076 €
      Dec
      Find prices
      Jan
      from 1.117 €
      Feb
      from 1.152 €
      Mar
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      Apr
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      May
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      Jun
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      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 973 €
      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 found973 €
      Cheapest month to flyAugust

      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 973 €. 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 973 €.
      As of July 2026, there are no flights flying from Portland to Chiang Mai.
      The cheapest month to fly from Portland to Chiang Mai is usually August.
      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 Saturday, 22 August 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, Frontier Airlines offers the cheapest flight tickets to Chiang Mai.

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

      • The timezone in Chiang Mai is UTC+7, which is 15 hours ahead of Portland.

      • Leave plenty of time to catch your PDX to CNX flight. A good rule of thumb is to arrive at least two hours before international departures and an hour ahead for domestic flights.

      • During popular months like July, you'll want to get to the airport well in advance. Arrive two hours before domestic departures and four hours ahead for an international flight whenever you're flying during a high season in general.

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

      • At the moment, 451 € is the lowest price we've found for a one-way Portland Airport to Chiang Mai Airport flight. The best price for a return ticket is 973 €. Keep in mind that fares could change due to demand at the time of booking.

      • It's usually best to book ahead of time if you want to get cheap tickets from PDX to CNX. That's because airlines change prices based on demand, which tends to increase closer to the date of departure.

      • If you're flexible with your travel plans, try using the 'Whole month' search tool. It'll find the cheapest price in every month when looking for a flight from Portland Airport to Chiang Mai Airport.

      • Cut down on the time spent looking for cheap flights from PDX to CNX by creating a Price Alert. We'll send you an email or notification through the app when fares go down.

      • Secure the perfect flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from Portland Airport to Chiang Mai Airport, use the 'Sort by' tool. You can also filter by arrival and departure times, airline, and journey duration.

      Handy information about Portland Airport (PDX)

      • The address for PDX is 7000 NE Airport Way.

      • Portland Airport gets high marks for on-time performance. 83% of flights that depart PDX arrive at their destination without delay.

      • Central Portland to Portland Airport is approximately 19 kilometres. Depending on traffic, it'll take you about 20 minutes to get there if you're driving, ride-sharing or catching a taxi.

      • Expect a trip time of about 40 minutes when using public transport.

      • Searching for a handy hotel close to PDX? If you're boarding an early flight from Portland Airport to Chiang Mai Airport, these stays will have you moments from your departure lounge:

      Arriving at Chiang Mai Airport (CNX)

      • If you're getting in on a late Portland Airport to Chiang Mai Airport flight, nothing beats the convenience of being near the terminal. Grab your bags from the carousel and then be showered and snoozing shortly after at one of these accommodation options near CNX:

      • Grab a Chiang Mai Airport rental car and explore Chiang Mai and beyond with your own wheels. Chic Car Rent, asap car rental and Hertz are top providers you can book with here.

      • Lock in the best possible rate by booking your vehicle from Chiang Mai Airport around two weeks in advance of your trip.

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

      • Chiang Mai Airport is roughly 3 kilometres from the centre of Chiang Mai. The drive time takes around 15 minutes.

      • Travelling on public transport takes around 25 minutes.

      When to fly to Chiang Mai Airport (CNX)

      • It's time to pick your travel dates for your flight from Portland Airport to Chiang Mai Airport. January is the most popular month to head to Chiang Mai. If you prefer a more low-key vibe, go in June.

      • When reserving your flight from Portland Airport to Chiang Mai Airport, think about the kind of weather you like. April is the warmest month in Chiang Mai, with temperatures ranging from 22ºC (72ºF) to 42ºC (108ºF).

      • Search for cheap tickets from PDX to CNX in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between 12ºC (54ºF) and 31ºC (88ºF) on average.

      Explore more of Thailand

      • You've visited Chiang Mai, now it's time to explore other parts of Thailand. Journey around 434 kilometres east to Udon Thani to tick off its top attractions. From Thai-Chinese Cultural Centre to Wat Pho Chai and Wat Burapa Wanaram, there's plenty to keep you busy.

      • Lampang is another must-experience destination in Thailand and is around 80 kilometres south-east of Chiang Mai. No journey is complete without seeing Wat Chiang Rai, Wat Phra Kaew Don Tao Suchadaram and Wat Chai Mongkhon.

      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 12 days.