$456 Cheap Flights from Portland (PDX) to Chiang Mai (CNX)

View $456 flight on Sun, Sep 21, 2025Opens in a new window

Popular airlines from Portland International Airport (PDX) to Chiang Mai Intl. Airport (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 $456 for one-way flights and $840 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, Sep 21 - Sun, Oct 19
PDX
Portland
CNX
Chiang Mai
$840 Roundtrip, just found
$840
Roundtrip
just found
Select Delta flight, departing Sun, Sep 21 from Portland to Chiang Mai, returning Sun, Oct 19, priced at $840 just found
Delta
Fri, Sep 5 - Sat, Sep 20
PDX
Portland
CNX
Chiang Mai
$840 Roundtrip, found 1 day ago
$840
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Sep 5 from Portland to Chiang Mai, returning Sat, Sep 20, priced at $840 found 1 day ago
Korean Air
Sun, Feb 1 - Wed, Feb 11
PDX
Portland
CNX
Chiang Mai
$845 Roundtrip, found 4 hours ago
$845
Roundtrip
found 4 hours ago
Select Korean Air flight, departing Sun, Feb 1 from Portland to Chiang Mai, returning Wed, Feb 11, priced at $845 found 4 hours ago
Korean Air
Sun, Sep 21 - Sun, Oct 19
PDX
Portland
CNX
Chiang Mai
$852 Roundtrip, just found
$852
Roundtrip
just found
Select Korean Air flight, departing Sun, Sep 21 from Portland to Chiang Mai, returning Sun, Oct 19, priced at $852 just found
Korean Air
Mon, Sep 8 - Fri, Sep 19
PDX
Portland
CNX
Chiang Mai
$852 Roundtrip, found 1 day ago
$852
Roundtrip
found 1 day ago
Select Korean Air flight, departing Mon, Sep 8 from Portland to Chiang Mai, returning Fri, Sep 19, priced at $852 found 1 day ago
STARLUX Airlines
Sun, Feb 1 - Tue, Feb 17
PDX
Portland
CNX
Chiang Mai
$852 Roundtrip, found 5 hours ago
$852
Roundtrip
found 5 hours ago
Select STARLUX Airlines flight, departing Sun, Feb 1 from Portland to Chiang Mai, returning Tue, Feb 17, priced at $852 found 5 hours ago
Alaska Airlines
Sat, Feb 28 - Sat, Mar 7
PDX
Portland
CNX
Chiang Mai
$859 Roundtrip, found 1 day ago
$859
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Feb 28 from Portland to Chiang Mai, returning Sat, Mar 7, priced at $859 found 1 day ago
STARLUX Airlines
Sun, Feb 1 - Thu, Feb 12
PDX
Portland
CNX
Chiang Mai
$887 Roundtrip, found 4 hours ago
$887
Roundtrip
found 4 hours ago
Select STARLUX Airlines flight, departing Sun, Feb 1 from Portland to Chiang Mai, returning Thu, Feb 12, priced at $887 found 4 hours ago
STARLUX Airlines
Sun, Mar 1 - Sat, Mar 14
PDX
Portland
CNX
Chiang Mai
$888 Roundtrip, found 3 days ago
$888
Roundtrip
found 3 days ago
Select STARLUX Airlines flight, departing Sun, Mar 1 from Portland to Chiang Mai, returning Sat, Mar 14, priced at $888 found 3 days ago
Air Canada
Wed, Oct 29 - Fri, Nov 7
PDX
Portland
CNX
Chiang Mai
$1,130 Roundtrip, found 3 hours ago
$1,130
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Wed, Oct 29 from Portland to Chiang Mai, returning Fri, Nov 7, priced at $1,130 found 3 hours ago

Alternative airports near Chiang Mai

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Chiang Mai Intl. CNX. Cheapest and Closest option available. Average driving time to city center is 10 minutes. Flights from $840
CNX
Chiang Mai Intl.
CheapestClosest
Average driving time to city center10 min
Flights from $840
Flights from Portland (PDX) to Chiang Mai (CNX)
Origin airport
Portland Intl.
Destination airport
Chiang Mai Intl.
Airlines serving
Air Canada, Asiana Airlines, British Airways, Delta, KLM, Korean Air, Malaysia Airlines, STARLUX Airlines
Roundtrip price
$839
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 September. 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 $456 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?
Grab a cheap one-way flight from $456 or cheap return flight from $840 from Portland Intl. Airport (PDX) to Chiang Mai Intl. Airport (CNX) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Portland Intl. Airport (PDX) to Chiang Mai Intl. Airport (CNX)?
Planning your trip for September may help you find better deals, as it's the cheapest month for flights between PDX and CNX. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Portland Intl. Airport (PDX) to Chiang Mai Intl. Airport (CNX)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest PDX to CNX flight.
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.