PDX - CNX

$457 Find Cheap Flights from Portland to Chiang Mai

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Chiang Mai departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Chiang Mai

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Chiang Mai, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Chiang Mai, as well as popular online travel agencies
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Cheap Flights from Portland to Chiang Mai (PDX-CNX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Chiang Mai that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Chiang Mai

Sat, Aug 30 - Sat, Sep 13
Korean Air Logo
4:55 pm - 9:55 pmPDX-CNX
39h 00m2 stops
Korean Air Logo
11:15 pm - 1:19 pmCNX-PDX
28h 04m2 stops
$790Korean Air
Find Deal
Sat, Sep 13 - Sun, Sep 21
Korean Air Logo
9:10 am - 9:55 pmPDX-CNX
22h 45m2 stops
Korean Air Logo
11:15 pm - 5:06 pmCNX-PDX
31h 51m2 stops
$796Korean Air
Find Deal
Fri, Oct 31 - Tue, Nov 18
Korean Air Logo
5:10 pm - 11:05 pmPDX-CNX
39h 55m2 stops
Korean Air Logo
12:15 am - 7:28 pmCNX-PDX
34h 13m2 stops
$802Korean Air
Find Deal
Mon, Nov 10 - Wed, Dec 3
China Airlines Logo
3:30 pm - 10:25 amPDX-CNX
27h 55m2 stops
China Airlines Logo
11:25 am - 11:19 pmCNX-PDX
26h 54m2 stops
$870China Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
STARLUX Airlines Logo
9:30 pm - 4:20 pmPDX-CNX
28h 50m2 stops
STARLUX Airlines Logo
5:20 pm - 7:10 pmCNX-PDX
39h 50m2 stops
$897STARLUX Airlines
Find Deal
Tue, Jul 1 - Mon, Jul 7
 Logo
5:40 pm - 11:20 pmPDX-CNX
39h 40m2 stops
 Logo
12:15 am - 8:30 pmCNX-PDX
34h 15m2 stops
Sat, Oct 4 - Mon, Oct 13
EVA Air Logo
10:00 pm - 10:25 amPDX-CNX
22h 25m2 stops
EVA Air Logo
11:35 am - 6:20 amCNX-PDX
32h 45m2 stops
$1,036EVA Air
Find Deal
Fri, Oct 31 - Wed, Nov 19
EVA Air Logo
10:43 am - 10:35 amPDX-CNX
33h 52m2 stops
EVA Air Logo
11:50 am - 11:58 pmCNX-PDX
27h 08m2 stops
$1,041EVA Air
Find Deal
Tue, Nov 4 - Sun, Nov 16
China Airlines Logo
12:35 pm - 10:25 amPDX-CNX
54h 50m2 stops
China Airlines Logo
11:25 am - 6:17 amCNX-PDX
33h 52m2 stops
$1,054China Airlines
Find Deal
Thu, Jul 10 - Wed, Jul 16
 Logo
9:40 am - 11:00 pmPDX-CNX
23h 20m2 stops
 Logo
12:45 am - 6:26 pmCNX-PDX
31h 41m2 stops
$1,085
Find Deal
Useful Info

KAYAK's insights & trends for Portland to Chiang Mai flights

Get data-powered insights and trends into flights from Portland to Chiang Mai to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Portland to Chiang Mai?

The average price of all round-trip flights from Portland to Chiang Mai clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Chiang Mai on a Wednesday and more expensive on a Tuesday. On your return trip to Portland, you should consider flying back on a Tuesday, and avoid Wednesdays for better deals.

What is the cheapest month to fly from Portland to Chiang Mai?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Chiang Mai, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Portland to Chiang Mai is May, where tickets cost $975 (return) on average. On the other hand, the most expensive months are September and June, where the average cost of round-trip tickets is $1,925 and $1,709 respectively.

Good to know

Low seasonApril
High seasonNovember
Cheapest flight$457
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from Portland to Chiang Mai

When to book flights from Portland to Chiang Mai

Are your dates flexible? Find out the best times to travel from Portland to Chiang Mai based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to Chiang Mai

  • What is the cheapest flight from Portland to Chiang Mai?

    In the last 3 days, the lowest price for a flight from Portland to Chiang Mai was $457 for a one-way ticket and $790 for a round-trip.

  • Do I need a passport to fly between Portland and Chiang Mai?

    Yes

  • Which aircraft models fly most regularly from Portland to Chiang Mai?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Portland to Chiang Mai?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Portland and Chiang Mai, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Portland to Chiang Mai, Korean Air or EVA Air?

    The two airlines most popular with KAYAK users for flights from Portland to Chiang Mai are Korean Air and EVA Air. With an average price for the route of $1,274 and an overall rating of 8.4, Korean Air is the most popular choice. EVA Air is also a great choice for the route, with an average price of $1,187 and an overall rating of 8.4.

  • How does KAYAK find such low prices on flights from Portland to Chiang Mai?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Chiang Mai.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Chiang Mai?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chiang Mai from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Chiang Mai?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chiang Mai with an airline and back to Portland with another airline. Booking your flights between Portland and CNX can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Chiang Mai?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chiang Mai from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airlines flying from Portland to Chiang Mai

 
See real verified KAYAK customer reviews for airlines flying from Portland to Chiang Mai. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Chiang Mai? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
EVA AirOverall score based on 1202 reviews
8.4Boarding
8.1Food
8.6Crew
8.3Comfort
8.0Entertainment
Airline reviews

The food from Los Angeles to Taipei made me throw up. The flight is also not comfort. But the staffs are very friendly and nice.

8.0 ExcellentAnonymous, Jun 2025LAX - TPE
Read more EVA Air reviews

The food from Los Angeles to Taipei made me throw up. The flight is also not comfort. But the staffs are very friendly and nice.

I have never heard of EVA air before but I am so happy my wife and I were able to flight on their planes twice. Everything on these flights just felt better than their competitors. As someone with longer legs any bit of extra leg spaces is appreciated. The different options for food and drinks were also a plus. They were extra careful to make sure my wife's eating restrictions were taken care for. They had a before take off and landing announcements on the built in tablets for each seat and it gave out information that was very helpful. Such as what and how to declare your items in the specific country you landed in, any odd items that may be illegal to bring it (and even the reasoning why) and any other information you might need to make your post flight experience better. The only downside was there were "forced" ads on the tablet at take off for maybe 5-10 minutes but honestly, this flight was the cheapest option and had all the benefits listed above that is such an easy trade off. Im keeping an eye out for EVA air going forward.

First time traveling with EVA.. great experience in economy class... Personnel very friendly..

I appreciate the email reminders for online check-in which made my entry to the lines less stressful. The flight was on schedule and on time. The baording staff were proactively helpful and approachable. The airplane inflight food, entertainment and comfies as well as provisions are excellent even in the economy seating. The airline transfer was smooth and easy! Luggage safe and intact! Thank you EVA airline for making my trip a reliable safe and comfortable experience.

I was sleep when they brought the food. They had put a note on my seat. There was no food when I asked for food later. There was just one main meal served in this 14 hours flight. They offered me sandwich with ham which I don’t eat since I am pescatarian. Long story short I had to wait to get to TPE to get something to eat. I am extremely disappointed from the service. I have been flying EVA since I was 1 year old. Perhaps no more EVA for me. Seems EVA glorious day is long gone

Excellent food. Good service. Crammed Premium Economy seats. I Asked to change seats during check in. They told me the flight was fully booked. But on board I saw empty seats where I could have been easily relocated.

basic and only minimum of service, they offer nothing special

Except for crying babies all was ok although the movie selection wasn't the best.

Good. Please add a non- applicable category to your questions.

The app was awful. No accurate info. Paying for internet is a negative (Delta is free). The crew was very nice for the most part although you are not guaranteed to get good service. Some crew would ignore requests for things as simple as a cup of water if you were sleeping when the first serving was made. Food was great. Male crew member was exceptionally kind and responsive.

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Not many people, so you can lay down on two seats

They did an excellent job helping me with a wheelchair. I couldn’t have asked for any better help.

The delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

Great except for the delay in Korea. Korean Air did a great job setting up a hotel for the night. I also needed assistance with a wheelchair and they were outstanding.

The flight was on time and very quick, as expected, but the leg room isn't great in coach seats.

Just a typical domestic poor flight nothing more. There is no food choices in such a flight. Crew doesn't really care if you are on-board or not

My second flight wasn't better than the first one. And this is 14 hours trip, crew came out only to offer food and the choices was poor. This food choices are good for Asian people but not for westerners. The breakfast kind thing was a corn sausage really disgusting. The air-conditioned blower really blow high and cold, turn out on my arrival to feel seek, that makes the trip uncomfortable. The crew didn't not really come out during the trip to offer drinks or snacks. No fruits available. Very poor service

long flights are difficult but the crew and amenities made it a very good experience

Everything you need to know for your flight from Portland to Chiang Mai

Information on your arrival and departure airports

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