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Cheap flights from Portland to Chiang Mai from $543

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Chiang Mai departing on 9/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Portland to Chiang Mai

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:37 pm - 1:25 pm
PDX
-
CNX
53h 48m
2 stops
Multiple Airlines Logo
2:55 pm - 11:59 pm
CNX
-
PDX
47h 04m
2 stops
$1,124Multiple Airlines
Tue, Aug 11 - Tue, Aug 18
Multiple Airlines Logo
7:19 am - 10:25 am
PDX
-
CNX
37h 06m
2 stops
Multiple Airlines Logo
11:35 am - 9:07 am
CNX
-
PDX
35h 32m
2 stops
$1,144Multiple Airlines
Mon, Aug 17 - Tue, Aug 25
Multiple Airlines Logo
10:45 am - 10:25 am
PDX
-
CNX
33h 40m
2 stops
Multiple Airlines Logo
11:50 am - 11:02 pm
CNX
-
PDX
25h 12m
2 stops
$1,164Multiple Airlines
Sun, Oct 18 - Wed, Oct 28
Multiple Airlines Logo
7:00 am - 2:20 pm
PDX
-
CNX
40h 20m
2 stops
Multiple Airlines Logo
3:35 pm - 10:54 pm
CNX
-
PDX
46h 19m
2 stops
$1,166Multiple Airlines
Tue, Dec 1 - Thu, Dec 17
Multiple Airlines Logo
5:53 pm - 10:25 am
PDX
-
CNX
26h 32m
2 stops
Multiple Airlines Logo
11:35 am - 8:54 am
CNX
-
PDX
35h 19m
2 stops
$1,202Multiple Airlines
Mon, Aug 31 - Sat, Sep 5
Multiple Airlines Logo
9:27 pm - 10:25 am
PDX
-
CNX
46h 58m
2 stops
Multiple Airlines Logo
1:40 pm - 8:11 am
CNX
-
PDX
32h 31m
3 stops
$1,211Multiple Airlines
Mon, Aug 17 - Tue, Aug 25
Multiple Airlines Logo
7:19 am - 9:20 am
PDX
-
CNX
36h 01m
3 stops
Multiple Airlines Logo
1:40 pm - 8:11 am
CNX
-
PDX
32h 31m
3 stops
$1,229Multiple Airlines
Mon, Aug 17 - Tue, Aug 25
Multiple Airlines Logo
5:45 pm - 1:00 pm
PDX
-
CNX
29h 15m
3 stops
Multiple Airlines Logo
4:40 pm - 2:41 pm
CNX
-
PDX
36h 01m
2 stops
$1,265Multiple Airlines
Sun, Oct 18 - Wed, Oct 28
Multiple Airlines Logo
7:00 am - 11:20 pm
PDX
-
CNX
26h 20m
2 stops
Multiple Airlines Logo
12:30 am - 4:47 pm
CNX
-
PDX
30h 17m
2 stops
$1,272Multiple Airlines
Sun, Aug 9 - Sat, Aug 15
Multiple Airlines Logo
9:32 pm - 10:25 am
PDX
-
CNX
22h 53m
2 stops
Multiple Airlines Logo
1:40 pm - 9:56 am
CNX
-
PDX
34h 16m
3 stops
$1,296Multiple Airlines
Mon, Aug 31 - Sat, Sep 5

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Qatar Airways flights from Portland to Chiang Mai

Our best Qatar Airways deals on Portland to Chiang Mai flight tickets
Qatar Airways
Aug 31
PDX11:48 amPortland
33h 27m
3 stops
CNX11:15 amChiang Mai
Sep 5
CNX8:00 pmChiang Mai
34h 49m
3 stops
PDX4:49 pmPortland
$1,629
Qatar Airways
Aug 31
PDX11:48 amPortland
33h 27m
3 stops
CNX11:15 amChiang Mai
Sep 5
CNX8:00 pmChiang Mai
37h 53m
3 stops
PDX7:53 pmPortland
$1,788

momondo 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, momondo users made 832,500 searches. Data last updated June 29, 2026.
Use the filters below to find and compare flights from Portland to Chiang Mai that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Tue 8/11

5:37 pm-1:25 pm

2 stops53h 48m

Chiang Mai

Tue 8/18

2:55 pm-11:59 pm

2 stops47h 04m

$1,124

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 8/17

7:19 am-10:25 am

2 stops37h 06m

Chiang Mai

Tue 8/25

11:35 am-9:07 am

2 stops35h 32m

$1,144

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Sun 10/18

10:45 am-10:25 am

2 stops33h 40m

Chiang Mai

Wed 10/28

11:50 am-11:02 pm

2 stops25h 12m

$1,164

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Tue 12/1

7:00 am-2:20 pm

2 stops40h 20m

Chiang Mai

Thu 12/17

3:35 pm-10:54 pm

2 stops46h 19m

$1,166

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 8/31

5:53 pm-10:25 am

2 stops26h 32m

Chiang Mai

Sat 9/5

11:35 am-8:54 am

2 stops35h 19m

$1,202

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 8/17

9:27 pm-10:25 am

2 stops46h 58m

Chiang Mai

Tue 8/25

1:40 pm-8:11 am

3 stops32h 31m

$1,211

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 8/17

7:19 am-9:20 am

3 stops36h 01m

Chiang Mai

Tue 8/25

1:40 pm-8:11 am

3 stops32h 31m

$1,229

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Sun 10/18

5:45 pm-1:00 pm

3 stops29h 15m

Chiang Mai

Wed 10/28

4:40 pm-2:41 pm

2 stops36h 01m

$1,265
Quickest round-trip

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Sun 8/9

7:00 am-11:20 pm

2 stops26h 20m

Chiang Mai

Sat 8/15

12:30 am-4:47 pm

2 stops30h 17m

$1,272

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 8/31

9:32 pm-10:25 am

2 stops22h 53m

Chiang Mai

Sat 9/5

1:40 pm-9:56 am

3 stops34h 16m

$1,296

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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When to book flights from Portland to Chiang Mai

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Chiang Mai according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to Chiang Mai (PDX to CNX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Chiang Mai

Fastest flight time

26h 55m

Direct flights

None
The fastest flight from Portland to Chiang Mai takes 26h 55m
There are no direct flights from Portland to Chiang Mai. There are no popular flight routes from Portland to Chiang Mai.
Search flight deals

Frequently asked questions about flying from Portland to Chiang Mai

  • How far is Portland to Chiang Mai by plane?

    Chiang Mai is 7278.1 mi away from Portland. A reasonable flight in good conditions will take 26h 55m.

  • When did momondo last update prices for flights from Portland Airport to Chiang Mai Airport?

    Prices for flights from Portland Airport to Chiang Mai Airport refresh daily.

  • How old do you have to be to fly from Portland Airport to Chiang Mai Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Chiang Mai Airport.

  • What documentation or ID do you need to fly to Chiang Mai Airport?

    The travel and health documents you'll need for your trip to Chiang Mai Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chiang Mai Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Portland to Chiang Mai

  • How do I get Price Alerts for flights from Portland to Chiang Mai?

    Price Alerts will notify you by email when the price for flights to Chiang Mai from Portland decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Portland to Chiang Mai with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Chiang Mai?

It is quick and easy to find Portland to Chiang Mai flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Chiang Mai that suits you.

Can I find flights from Portland to Chiang Mai with flexible booking policies on momondo?

Flights from Portland to Chiang Mai with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Portland to Chiang Mai?

Once all potential Portland to Chiang Mai flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Portland to Chiang Mai right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Portland to Chiang Mai flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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