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Chiang Mai

$440+ 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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — CNX
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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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 September 16, 2025.

Round-trip from

$802
(FlightHub)

One-way from

$440
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$983
From Portland to Chiang Mai
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One-way flight from Portland to Chiang Mai
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Highest demand for flights based on searches. 22% potential increase in price ($399 potential increase over avg. RT price).
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Cheapest flight prices on average. 12% potential price decrease ($151 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 16, 2025.

This oojo deal was found by Cheapflights users on 9/14. 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 9/237:31 pmPDX - CNX
2 stops30h 49mSTARLUX Airlines
Tue 11/184:55 pmCNX - PDX
2 stops42h 42mSTARLUX Airlines
Deal found 9/14$896
This oojo deal was found by Cheapflights users on 9/14. 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.
Wed 10/2910:40 amPDX - CNX
2 stops33h 45mChina Airlines
Wed 11/511:25 amCNX - PDX
2 stops27h 12mChina Airlines
Deal found 9/14$920
This Gurufare deal was found by Cheapflights users on 9/14. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:20 amPDX - CNX
2 stops40h 00mMultiple Airlines
Wed 12/33:35 pmCNX - PDX
2 stops40h 15mMultiple Airlines
Deal found 9/14$937
This STARLUX Airlines deal was found by Cheapflights users on 9/14. 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 STARLUX Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/148:50 pmPDX - CNX
2 stops29h 30mSTARLUX Airlines
Thu 10/304:55 pmCNX - PDX
2 stops45h 14mSTARLUX Airlines
Deal found 9/14$938
This SmartFares deal was found by Cheapflights users on 9/16. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/132:52 pmPDX - CNX
2 stops29h 33mMultiple Airlines
Thu 12/1111:50 amCNX - PDX
2 stops26h 46mMultiple Airlines
Deal found 9/16$942
This oojo deal was found by Cheapflights users on 9/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/102:30 pmPDX - CNX
2 stops29h 05mEVA Air
Wed 12/311:50 amCNX - PDX
2 stops24h 00mEVA Air
Deal found 9/15$943
This oojo deal was found by Cheapflights users on 9/14. 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 stops34h 03mChina Airlines
Deal found 9/14$946
This oojo deal was found by Cheapflights users on 9/16. 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 9/238:37 pmPDX - CNX
2 stops29h 43mMultiple Airlines
Tue 9/305:20 pmCNX - PDX
2 stops30h 06mMultiple Airlines
Deal found 9/16$948
This Korean Air deal was found by Cheapflights users on 9/14. 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.
Mon 9/159:17 amPDX - CNX
2 stops22h 38mKorean Air
Mon 9/2911:15 pmCNX - PDX
2 stops29h 37mKorean Air
Deal found 9/14$953
This oojo deal was found by Cheapflights users on 9/14. 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 11/45:30 pmPDX - CNX
2 stops25h 55mChina Airlines
Sun 11/1611:25 amCNX - PDX
2 stops37h 15mChina Airlines
Deal found 9/14$955

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 September 16, 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

Tue 10/14

8:50 pm-4:20 pm

2 stops29h 30m

Chiang Mai

Thu 10/30

4:55 pm-12:09 am

2 stops45h 14m

$938

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 11/10

2:30 pm-10:35 am

2 stops29h 05m

Chiang Mai

Wed 12/3

11:50 am-8:50 pm

2 stops24h 00m

$943

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Sat 10/4

5:45 pm-4:25 pm

2 stops32h 40m

Chiang Mai

Mon 10/13

5:25 pm-8:50 pm

2 stops41h 25m

$946

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Tue 9/23

8:37 pm-4:20 pm

2 stops29h 43m

Chiang Mai

Tue 9/30

5:20 pm-9:26 am

2 stops30h 06m

$948

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Tue 11/4

5:30 pm-10:25 am

2 stops25h 55m

Chiang Mai

Sun 11/16

11:25 am-9:40 am

2 stops37h 15m

$956

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Tue 9/23

5:15 am-9:55 pm

2 stops26h 40m

Chiang Mai

Mon 11/17

12:15 am-10:56 pm

2 stops37h 41m

$1,011

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Fri 10/17

5:25 pm-9:55 pm

2 stops38h 30m

Chiang Mai

Tue 10/28

12:15 am-4:45 pm

2 stops30h 30m

$1,039

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Tue 9/23

6:20 am-9:05 am

3 stops36h 45m

Chiang Mai

Tue 11/18

3:35 pm-4:50 pm

2 stops40h 15m

$1,045

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 10/27

9:30 pm-3:55 pm

2 stops52h 25m

Chiang Mai

Sat 11/8

4:35 pm-6:30 pm

2 stops40h 55m

$1,056

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 10/27

7:00 am-9:25 am

3 stops36h 25m

Chiang Mai

Sat 11/15

12:15 pm-8:37 pm

3 stops23h 22m

$1,080

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 23 results
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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 September 16, 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 September 16, 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
1,236 reviews

Comfort

8.3

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

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
1,236 reviews
EVA Air
8.4
Very good
1,236 reviews

Comfort

8.3

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

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
1,140 reviews
EVA Air
8.4
Very good
1,236 reviews

Comfort

8.3

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

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 05m. STARLUX Airlines provides one of the quickest options available for as low as $943. 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 $975. Users have found that Korean Air is 42% 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 $975). Flying from Portland to Chiang Mai in June is currently the most expensive (average of $1,562). 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

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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$789Average$1,150FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$975Average$1,104FlexibilityNo cancel feeOn-time74%

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