$490 Cheap Flights from Portland (PDX) to Chiang Mai (CNX)

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Cheap Flights from Portland to Chiang Mai (PDX-CNX)

Prices were available within the past 7 days and start at $490 for one-way flights and $916 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Oct 21 - Tue, Nov 4
PDX
Portland
CNX
Chiang Mai
$916 Roundtrip, found 2 days ago
$916
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, Oct 21 from Portland to Chiang Mai, returning Tue, Nov 4, priced at $916 found 2 days ago
Alaska Airlines
Mon, Sep 8 - Tue, Sep 30
PDX
Portland
CNX
Chiang Mai
$920 Roundtrip, found 15 hours ago
$920
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Mon, Sep 8 from Portland to Chiang Mai, returning Tue, Sep 30, priced at $920 found 15 hours ago
Alaska Airlines
Tue, Aug 26 - Tue, Sep 16
PDX
Portland
CNX
Chiang Mai
$927 Roundtrip, found 8 hours ago
$927
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Tue, Aug 26 from Portland to Chiang Mai, returning Tue, Sep 16, priced at $927 found 8 hours ago
Alaska Airlines
Tue, Sep 2 - Wed, Sep 24
PDX
Portland
CNX
Chiang Mai
$933 Roundtrip, found 1 day ago
$933
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Sep 2 from Portland to Chiang Mai, returning Wed, Sep 24, priced at $933 found 1 day ago
Alaska Airlines
Thu, Oct 2 - Sat, Oct 11
PDX
Portland
CNX
Chiang Mai
$941 Roundtrip, found 4 days ago
$941
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Oct 2 from Portland to Chiang Mai, returning Sat, Oct 11, priced at $941 found 4 days ago
Alaska Airlines
Mon, Sep 8 - Tue, Sep 30
PDX
Portland
CNX
Chiang Mai
$943 Roundtrip, found 15 hours ago
$943
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Mon, Sep 8 from Portland to Chiang Mai, returning Tue, Sep 30, priced at $943 found 15 hours ago
Delta
Tue, Sep 9 - Sun, Sep 14
PDX
Portland
CNX
Chiang Mai
$955 Roundtrip, found 2 days ago
$955
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Sep 9 from Portland to Chiang Mai, returning Sun, Sep 14, priced at $955 found 2 days ago
Korean Air
Thu, Sep 11 - Sun, Sep 14
PDX
Portland
CNX
Chiang Mai
$960 Roundtrip, found 2 days ago
$960
Roundtrip
found 2 days ago
Select Korean Air flight, departing Thu, Sep 11 from Portland to Chiang Mai, returning Sun, Sep 14, priced at $960 found 2 days ago
STARLUX Airlines
Sun, Sep 7 - Tue, Sep 16
PDX
Portland
CNX
Chiang Mai
$989 Roundtrip, found 2 days ago
$989
Roundtrip
found 2 days ago
Select STARLUX Airlines flight, departing Sun, Sep 7 from Portland to Chiang Mai, returning Tue, Sep 16, priced at $989 found 2 days ago
Air Canada
Tue, Sep 2 - Wed, Sep 24
PDX
Portland
CNX
Chiang Mai
$1,148 Roundtrip, found 1 day ago
$1,148
Roundtrip
found 1 day ago
Select Air Canada flight, departing Tue, Sep 2 from Portland to Chiang Mai, returning Wed, Sep 24, priced at $1,148 found 1 day ago
Flights from Portland (PDX) to Chiang Mai (CNX)
Origin airport
Portland Intl.
Destination airport
Chiang Mai Intl.
Airlines serving
Air Canada, Asiana Airlines, China Southern Airlines, Delta, KLM, Korean Air, Malaysia Airlines, STARLUX Airlines
Roundtrip price
$916
Distance
7283 mi

Portland to Chiang Mai Flights

The cheapest times to fly from Portland to Chiang Mai

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Portland to Chiang Mai are during the month of October. You can find some of the cheapest flights from Portland to Chiang Mai with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Portland to Chiang Mai

Sunday is one of the best days to book for cheap flights from Portland to Chiang Mai: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Portland to Chiang Mai

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Portland to Chiang Mai in 2025. You can also book with separate airlines for your outbound and return journeys, from $490 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Portland to Chiang Mai flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Portland to Chiang Mai airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Chiang Mai Intl. Airport (CNX) cost?
Discover the latest flight deals from PDX to CNX by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from PDX to CNX?
The cheapest flights from PDX to CNX are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from PDX to CNX?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from PDX to CNX. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Portland Intl. Airport (PDX) to Chiang Mai Intl. Airport (CNX)?
You’ll need to catch a flight with a layover if you’re traveling from Portland Intl. Airport (PDX) to Chiang Mai Intl. Airport (CNX). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from PDX to CNX?
You’ll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Portland Intl. Airport (PDX) to Chiang Mai Intl. Airport (CNX)?
To touch down at Chiang Mai Intl. Airport (CNX) without delays, opt for a flight that leaves Portland Intl. Airport (PDX) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Portland Intl. Airport (PDX) to Chiang Mai Intl. Airport (CNX) last-minute?
Booking your flight from PDX to CNX right before your getaway is typically more expensive. But if there’s some wiggle room with your schedule, you could snag a cheap last-minute fare.
Is it cheaper to book a PDX to CNX flight and hotel package?
You’ll typically save money by securing a PDX to CNX flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it’s simple to manage it all in one convenient place. Once you’ve selected your ideal accommodations and flights, consider adding extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Chiang Mai Intl. Airport (CNX)?
Typically, you can reschedule or cancel your PDX to CNX flight. However, there may be additional charges, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline’s policies and fees on flight changes, or if you want further information, head to our Customer Service portal.

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*Available to One Key members.