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Cheap flights from Portland to Chiang Mai from $523

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 8/28. 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
5:56 pm - 1:25 pm
PDX
-
CNX
53h 29m
2 stops
Multiple Airlines Logo
2:55 pm - 5:11 pm
CNX
-
PDX
64h 16m
3 stops
$902Multiple Airlines
Fri, Aug 28 - Fri, Sep 4
Multiple Airlines Logo
12:20 pm - 1:25 pm
PDX
-
CNX
59h 05m
3 stops
Multiple Airlines Logo
2:55 pm - 5:11 pm
CNX
-
PDX
64h 16m
3 stops
$910Multiple Airlines
Fri, Aug 28 - Fri, Sep 4
Multiple Airlines Logo
10:48 am - 9:50 pm
PDX
-
CNX
45h 02m
2 stops
Multiple Airlines Logo
11:05 pm - 1:30 pm
CNX
-
PDX
29h 25m
2 stops
$916Multiple Airlines
Mon, Oct 26 - Tue, Nov 3
Multiple Airlines Logo
10:37 am - 11:20 pm
PDX
-
CNX
46h 43m
2 stops
Multiple Airlines Logo
2:55 pm - 11:59 pm
CNX
-
PDX
47h 04m
2 stops
$941Multiple Airlines
Wed, Aug 19 - Wed, Aug 26
Multiple Airlines Logo
8:18 pm - 1:25 pm
PDX
-
CNX
51h 07m
2 stops
Multiple Airlines Logo
2:55 pm - 11:59 pm
CNX
-
PDX
47h 04m
2 stops
$961Multiple Airlines
Mon, Aug 31 - Sat, Sep 5
Multiple Airlines Logo
5:48 pm - 2:20 pm
PDX
-
CNX
54h 32m
2 stops
Multiple Airlines Logo
3:35 pm - 4:34 pm
CNX
-
PDX
39h 59m
2 stops
$966Multiple Airlines
Wed, Oct 28 - Wed, Nov 11
Multiple Airlines Logo
6:18 pm - 2:20 pm
PDX
-
CNX
54h 02m
2 stops
Multiple Airlines Logo
3:35 pm - 4:35 pm
CNX
-
PDX
40h 00m
2 stops
$988Multiple Airlines
Sun, Oct 25 - Tue, Nov 3
Korean Air Logo
7:59 pm - 10:55 pm
PDX
-
CNX
36h 56m
2 stops
Korean Air Logo
12:15 am - 10:19 pm
CNX
-
PDX
37h 04m
2 stops
$997Korean Air
Mon, Oct 26 - Wed, Nov 4
Korean Air Logo
7:59 pm - 10:55 pm
PDX
-
CNX
36h 56m
2 stops
Korean Air Logo
12:15 am - 10:19 pm
CNX
-
PDX
37h 04m
2 stops
$997Korean Air
Mon, Oct 26 - Tue, Nov 3
Korean Air Logo
5:15 pm - 10:55 pm
PDX
-
CNX
39h 40m
2 stops
Korean Air Logo
12:15 am - 4:15 pm
CNX
-
PDX
31h 00m
2 stops
$997Korean Air
Wed, Oct 28 - Mon, Nov 2

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Korean Air flights from Portland to Chiang Mai

Our best Korean Air deals on Portland to Chiang Mai flight tickets
Korean Air
Oct 27
PDX9:31 amPortland
23h 24m
2 stops
CNX10:55 pmChiang Mai
Nov 1
CNX12:15 amChiang Mai
37h 04m
2 stops
PDX10:19 pmPortland
$997
Korean Air
Jan 17
PDX11:10 amPortland
44h 45m
2 stops
CNX10:55 pmChiang Mai
Feb 16
CNX12:15 amChiang Mai
28h 03m
2 stops
PDX1:18 pmPortland
$1,002
Korean Air
Oct 25
PDX7:59 pmPortland
36h 56m
2 stops
CNX10:55 pmChiang Mai
Nov 4
CNX12:15 amChiang Mai
29h 36m
2 stops
PDX2:51 pmPortland
$1,003

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 August 2, 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

Fri 8/28

5:56 pm-1:25 pm

2 stops53h 29m

Chiang Mai

Fri 9/4

2:55 pm-5:11 pm

3 stops64h 16m

$902

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Fri 8/28

12:20 pm-1:25 pm

3 stops59h 05m

Chiang Mai

Fri 9/4

2:55 pm-5:11 pm

3 stops64h 16m

$910

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 10/26

10:48 am-9:50 pm

2 stops45h 02m

Chiang Mai

Tue 11/3

11:05 pm-1:30 pm

2 stops29h 25m

$916

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Wed 8/19

10:37 am-11:20 pm

2 stops46h 43m

Chiang Mai

Wed 8/26

2:55 pm-11:59 pm

2 stops47h 04m

$941

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 8/31

8:18 pm-1:25 pm

2 stops51h 07m

Chiang Mai

Sat 9/5

2:55 pm-11:59 pm

2 stops47h 04m

$961

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Wed 10/28

5:48 pm-2:20 pm

2 stops54h 32m

Chiang Mai

Wed 11/11

3:35 pm-4:34 pm

2 stops39h 59m

$966

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Sun 10/25

6:18 pm-2:20 pm

2 stops54h 02m

Chiang Mai

Tue 11/3

3:35 pm-4:35 pm

2 stops40h 00m

$988

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 10/26

7:59 pm-10:55 pm

2 stops36h 56m

Chiang Mai

Wed 11/4

12:15 am-10:19 pm

2 stops37h 04m

$997

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 10/26

7:59 pm-10:55 pm

2 stops36h 56m

Chiang Mai

Tue 11/3

12:15 am-10:19 pm

2 stops37h 04m

$997
Quickest round-trip

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Wed 10/28

5:15 pm-10:55 pm

2 stops39h 40m

Chiang Mai

Mon 11/2

12:15 am-4:15 pm

2 stops31h 00m

$997

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

25h 30m

Direct flights

None
The fastest flight from Portland to Chiang Mai takes 25h 30m
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 25h 30m.

  • 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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