HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chiang Mai

$422+ Cheap flights from Portland (PDX) to Chiang Mai (CNX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — CNX
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Chiang Mai with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Portland to Chiang Mai

Best flights from Portland to Chiang Mai
Discover carefully curated flight deals from Portland to Chiang Mai that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 28, 2025.

This SmartFares deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:50 pmPDX - CNX
2 stops25h 45mMultiple Airlines
Tue 3/1011:50 amCNX - PDX
2 stops37h 06mMultiple Airlines
Deal found 12/26$925
This oojo deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/262:47 pmPDX - CNX
2 stops28h 48mEVA Air
Sun 3/811:50 amCNX - PDX
2 stops24h 51mEVA Air
Deal found 12/26$993
This China Airlines deal was found by Cheapflights users on 12/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/125:51 pmPDX - CNX
2 stops25h 34mMultiple Airlines
Mon 2/165:35 pmCNX - PDX
2 stops21h 09mMultiple Airlines
Deal found 12/28$949
This oojo deal was found by Cheapflights users on 12/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/155:35 pmPDX - CNX
2 stops26h 00mEVA Air
Wed 2/2511:50 amCNX - PDX
2 stops36h 45mEVA Air
Deal found 12/28$1,050
This KAYAK deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/227:24 amPDX - CNX
2 stops39h 56mMultiple Airlines
Mon 2/23:35 pmCNX - PDX
2 stops39h 50mMultiple Airlines
Deal found 12/26$976
This China Airlines deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/75:51 pmPDX - CNX
2 stops25h 34mMultiple Airlines
Wed 2/1111:25 amCNX - PDX
2 stops37h 17mMultiple Airlines
Deal found 12/27$1,082
This KAYAK deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/269:48 pmPDX - CNX
2 stops45h 47mMultiple Airlines
Sun 3/87:45 pmCNX - PDX
3 stops40h 56mMultiple Airlines
Deal found 12/26$1,100

Find flight deals from Portland to Chiang Mai

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Chiang Mai (CNX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$925
(SmartFares)

One-way from

$422
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,227
Provider with most accurate pricing for Portland-Chiang Mai flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Chiang Mai flights.
Search Deals
From Portland to Chiang Mai
Search Deals
One-way flight from Portland to Chiang Mai
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($286 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($57 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Chiang Mai that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 28, 2025.
Use the filters below to find and compare flights from Portland to Chiang Mai that are best for you.

Fly from

Portland

Fly to

Chiang Mai

Route

Depart

Return

Price

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Wed 2/25

5:50 pm-10:35 am

2 stops25h 45m

Chiang Mai

Tue 3/10

11:50 am-10:56 am

2 stops37h 06m

$925

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 1/12

5:51 pm-10:25 am

2 stops25h 34m

Chiang Mai

Mon 2/16

5:35 pm-11:44 pm

2 stops21h 09m

$949

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Thu 1/22

7:24 am-2:20 pm

2 stops39h 56m

Chiang Mai

Mon 2/2

3:35 pm-4:25 pm

2 stops39h 50m

$976

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Thu 2/26

2:47 pm-10:35 am

2 stops28h 48m

Chiang Mai

Sun 3/8

11:50 am-9:41 pm

2 stops24h 51m

$993

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Thu 1/15

5:35 pm-10:35 am

2 stops26h 00m

Chiang Mai

Wed 2/25

11:50 am-9:35 am

2 stops36h 45m

$1,050

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Wed 1/7

5:51 pm-10:25 am

2 stops25h 34m

Chiang Mai

Wed 2/11

11:25 am-9:42 am

2 stops37h 17m

$1,082

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Thu 2/26

9:48 pm-10:35 am

2 stops45h 47m

Chiang Mai

Sun 3/8

7:45 pm-10:41 pm

3 stops40h 56m

$1,100

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 1/26

12:13 pm-9:55 pm

3 stops42h 42m

$422

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Tue 1/27

5:50 pm-5:15 pm

3 stops32h 25m

$456

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Wed 1/28

7:10 am-10:55 pm

2 stops24h 45m

$467

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 17 results
1
2

Compare providers for flights from Portland to Chiang Mai

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Chiang Mai in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-Chiang Mai flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland-Chiang Mai flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Portland-Chiang Mai flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Chiang Mai flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Chiang Mai flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Chiang Mai

Have a flexible travel schedule? Discover the best time to fly to Chiang Mai from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Chiang Mai

What is the cheapest time of day to fly from PDX to CNX?

Find hourly flight availability from Portland to Chiang Mai. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 28, 2025.

It’s typically best to fly out from Portland to Chiang Mai in the morning. Doing so could potentially save you 41% on the flight price compared to flying at noon, which is usually more expensive.

How much does it cost to fly round-trip from Portland to Chiang Mai?

Reviews of airlines servicing Chiang Mai

Get insights into the airlines that provide service to Chiang Mai. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chiang Mai. Reviews last updated December 28, 2025.
See what other customers who have flown with EVA Air from Portland to Chiang Mai have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.5
Very good
1,304 reviews

Crew

8.6

Food

8.1

Comfort

8.3

Overall

8.5

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Walter,Nov 2025

LAX - TPE

Everything went well. The crew was very friendly and efficient and they made a long flight enjoyable.
EVA Air
8.5
Very good
1,304 reviews
EVA Air
8.5
Very good
1,304 reviews

Crew

8.6

Food

8.1

Comfort

8.3

Overall

8.5

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Walter,Nov 2025

LAX - TPE

Everything went well. The crew was very friendly and efficient and they made a long flight enjoyable.

Related info for your journey

Find useful and relevant information for your journey from Portland to Chiang Mai. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Portland to Chiang Mai round-trip?

    Our cheapest airline available from Portland to Chiang Mai is EVA Air. Our recent data shows that you can find tickets from as low as $963 on this airline. Users have found that EVA Air is 15% cheaper than the other options available to this destination.

  • Can I find deals for flights from Portland to Chiang Mai that include hotel bookings?

    Yes. In addition to deals on Portland to Chiang Mai flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Chiang Mai?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Chiang Mai.

  • Can I find deals for business class flights from Portland to Chiang Mai?

    Yes. Cheapflights offers flight deals from Portland to Chiang Mai by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Portland to Chiang Mai

Discover the top airline that operate flights from Portland to Chiang Mai. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$963Average$1,068FlexibilityNo cancel feeOn-time74%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.