HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chiang Mai

$485+ 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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — CNX
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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

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 August 18, 2025.

Round-trip from

$802
(FlightHub)

One-way from

$485
(SmartFares)

Popular in

September

Cheapest in

May

Average price

$1,072
From Portland to Chiang Mai
Search Deals
One-way flight from Portland to Chiang Mai
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($236 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($133 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Portland to Chiang Mai

Cheapest flights from Portland to Chiang Mai
Explore the most affordable flight options available from Portland to Chiang Mai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This Korean Air deal was found by Cheapflights users on 8/18. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:01 pmPDX - CNX
2 stops38h 54mKorean Air
Sun 9/2111:15 pmCNX - PDX
2 stops29h 37mKorean Air
Deal found 8/18$846
This SmartFares deal was found by Cheapflights users on 8/18. 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.
Thu 10/27:31 pmPDX - CNX
2 stops30h 49mSTARLUX Airlines
Thu 10/95:20 pmCNX - PDX
2 stops41h 08mSTARLUX Airlines
Deal found 8/18$883
This Priceline deal was found by Cheapflights users on 8/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/308:37 pmPDX - CNX
2 stops29h 43mSTARLUX Airlines
Tue 10/75:20 pmCNX - PDX
2 stops44h 58mSTARLUX Airlines
Deal found 8/15$903
This oojo deal was found by Cheapflights users on 8/17. 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.
Mon 11/105:30 pmPDX - CNX
2 stops25h 55mChina Airlines
Wed 12/311:25 amCNX - PDX
2 stops27h 11mChina Airlines
Deal found 8/17$935
This oojo deal was found by Cheapflights users on 8/18. 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.
Sat 10/42:52 pmPDX - CNX
2 stops35h 33mChina Airlines
Mon 10/135:25 pmCNX - PDX
2 stops26h 55mChina Airlines
Deal found 8/18$952
This Korean Air deal was found by Cheapflights users on 8/17. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/229:17 amPDX - CNX
2 stops22h 38mKorean Air
Tue 10/2812:15 amCNX - PDX
2 stops34h 24mKorean Air
Deal found 8/17$953
This oojo deal was found by Cheapflights users on 8/17. 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 9/45:35 pmPDX - CNX
2 stops26h 45mChina Airlines
Wed 12/311:25 amCNX - PDX
2 stops27h 11mChina Airlines
Deal found 8/17$962
This Korean Air deal was found by Cheapflights users on 8/16. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/289:17 amPDX - CNX
2 stops23h 48mKorean Air
Mon 11/1012:15 amCNX - PDX
2 stops31h 16mKorean Air
Deal found 8/16$970
This oojo deal was found by Cheapflights users on 8/16. 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.
Tue 10/281:38 pmPDX - CNX
2 stops30h 57mEVA Air
Tue 11/1111:50 amCNX - PDX
2 stops26h 47mEVA Air
Deal found 8/16$976
This IEagle deal was found by Cheapflights users on 8/16. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/45:41 pmPDX - CNX
2 stops49h 54mMultiple Airlines
Mon 11/1711:50 amCNX - PDX
2 stops23h 47mMultiple Airlines
Deal found 8/16$977
This Korean Air deal was found by Cheapflights users on 8/18. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/316:14 amPDX - CNX
2 stops25h 41mKorean Air
Thu 2/1912:15 amCNX - PDX
2 stops31h 14mKorean Air
Deal found 8/18$989
This oojo deal was found by Cheapflights users on 8/17. 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.
Sat 10/42:30 pmPDX - CNX
2 stops29h 55mEVA Air
Mon 10/1311:35 amCNX - PDX
2 stops36h 12mEVA Air
Deal found 8/17$1,011

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 August 18, 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

Sun 1/11

7:45 pm-3:55 pm

2 stops29h 10m

Chiang Mai

Sat 1/24

4:55 pm-6:53 pm

2 stops40h 58m

$802

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Thu 1/22

4:00 pm-3:55 pm

2 stops32h 55m

Chiang Mai

Tue 2/24

4:55 pm-9:35 am

2 stops31h 40m

$835

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Thu 9/4

4:55 pm-9:55 pm

2 stops39h 00m

Chiang Mai

Tue 12/2

12:15 am-4:31 pm

2 stops31h 16m

$846

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Sat 9/13

5:01 pm-9:55 pm

2 stops38h 54m

Chiang Mai

Sun 9/21

11:15 pm-10:39 pm

2 stops37h 24m

$846

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 11/10

6:30 am-11:05 pm

2 stops25h 35m

Chiang Mai

Tue 12/2

12:15 am-4:31 pm

2 stops31h 16m

$846

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Thu 10/2

7:31 pm-4:20 pm

2 stops30h 49m

Chiang Mai

Thu 10/9

5:20 pm-8:28 pm

2 stops41h 08m

$883

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Thu 1/1

8:43 pm-3:55 pm

2 stops28h 12m

Chiang Mai

Thu 1/22

4:55 pm-8:43 pm

2 stops42h 48m

$888

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Tue 9/30

8:37 pm-4:20 pm

2 stops29h 43m

Chiang Mai

Tue 10/7

5:20 pm-12:18 am

2 stops44h 58m

$903

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Sun 9/28

2:50 pm-4:20 pm

2 stops35h 30m

$485

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Thu 1/1

7:39 pm-3:55 pm

2 stops29h 16m

$516

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 15 results
1
2

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 month to book a flight from Portland to Chiang Mai?

Currently, September is the cheapest month in which you can book a flight from Portland to Chiang Mai (average of $989). Flying from Portland to Chiang Mai in December is currently the most expensive (average of $1,620). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 August 18, 2025.

It’s typically best to fly out from Portland to Chiang Mai in the morning. Doing so could potentially save you 42% 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 August 18, 2025.
See what other customers who have flown with EVA Air and Korean 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
8.4
Very good
1,232 reviews

Food

8.1

Crew

8.6

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
EVA Air
8.4
Very good
1,232 reviews
EVA Air
8.4
Very good
1,232 reviews

Food

8.1

Crew

8.6

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
Korean Air
8.4
Very good
1,131 reviews
EVA Air
8.4
Very good
1,232 reviews

Food

8.1

Crew

8.6

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

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.

  • How long is the flight from Portland to Chiang Mai?

    A quick flight from Portland to Chiang Mai can take about 29h 10m. STARLUX Airlines provides one of the quickest options available for as low as $802. There are 7279 mi between Portland and Chiang Mai. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Portland to Chiang Mai round-trip?

    Our cheapest airline available from Portland to Chiang Mai is Korean Air. Our recent data shows that you can find tickets from as low as $789 on this airline. An additional option worth looking into is EVA Air, starting at $1,030. Users have found that Korean Air is 44% 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.

  • What is the cheapest month to book a flight from Portland to Chiang Mai?

    Currently, September is the cheapest month in which you can book a flight from Portland to Chiang Mai (average of $989). Flying from Portland to Chiang Mai in December is currently the most expensive (average of $1,620). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 2 airlines flying from Portland to Chiang Mai

Discover the top 2 airlines 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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$789Average$1,274FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,030Average$1,187FlexibilityNo 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.