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Chiang Mai

$430+ Cheap flights from Seattle (SEA) to Chiang Mai (CNX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CNX
Jul 27 — Aug 31
Mon 7/27
Mon 8/3
1 adult, Economy
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Cheap flight deals from Seattle to Chiang Mai

Cheapest flights from Seattle to Chiang Mai
Explore the most affordable flight options available from Seattle to Chiang Mai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 27, 2026.

This Korean Air deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1211:00 am
SEA
-
CNX
1 stop20h 55m
Korean Air
Sun 11/1512:15 am
CNX
-
SEA
1 stop23h 45m
Korean Air
Deal found 6/22$899
This Korean Air deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/304:15 pm
SEA
-
CNX
2 stops39h 40m
Korean Air
Wed 2/2412:15 am
CNX
-
SEA
1 stop23h 45m
Korean Air
Deal found 6/25$904
This Korean Air deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/211:00 am
SEA
-
CNX
1 stop20h 55m
Korean Air
Thu 11/512:15 am
CNX
-
SEA
1 stop23h 45m
Korean Air
Deal found 6/26$938
This Korean Air deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3012:00 pm
SEA
-
CNX
1 stop20h 55m
Korean Air
Thu 11/1212:15 am
CNX
-
SEA
1 stop23h 45m
Korean Air
Deal found 6/26$978

Find flight deals from Seattle to Chiang Mai

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Chiang Mai (CNX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$899
(Korean Air)

One-way from

$430
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,444
Provider with most accurate pricing for Seattle/Tacoma Intl-Chiang Mai flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Chiang Mai flights.
Search Deals
From Seattle/Tacoma Intl to Chiang Mai
Search Deals
One-way flight from Seattle/Tacoma Intl to Chiang Mai
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($111 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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, Cheapflights users made 2,558,603 searches. Data last updated June 27, 2026.
Use the filters below to find and compare flights from Seattle to Chiang Mai that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 11/12

11:00 am-10:55 pm

1 stop20h 55m

Chiang Mai

Sun 11/15

12:15 am-9:00 am

1 stop23h 45m

$899

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 11/2

7:20 am-10:55 pm

2 stops24h 35m

Chiang Mai

Thu 11/5

12:15 am-9:00 am

1 stop23h 45m

$944

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Fri 10/30

12:00 pm-10:55 pm

1 stop20h 55m

Chiang Mai

Thu 11/12

12:15 am-9:00 am

1 stop23h 45m

$978
Quickest round-trip

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Fri 9/11

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Mon 9/21

11:55 am-7:40 pm

2 stops21h 45m

$1,141

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 9/10

12:30 am-1:45 pm

2 stops23h 15m

Chiang Mai

Sun 9/20

11:55 am-7:40 pm

2 stops21h 45m

$1,273

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 9/10

12:30 am-1:45 pm

2 stops23h 15m

Chiang Mai

Sat 9/19

10:10 am-7:00 pm

2 stops22h 50m

$1,273
Cheapest one-way
Quickest one-way

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 11/8

11:00 am-10:55 pm

1 stop20h 55m

$442

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 11/9

4:15 pm-10:55 pm

2 stops39h 40m

$443

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 11/10

4:15 pm-10:55 pm

2 stops39h 40m

$443

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 11/7

12:00 pm-10:55 pm

2 stops43h 55m

$448

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/27

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Compare providers for flights from Seattle to Chiang Mai

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Chiang Mai in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Chiang Mai flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Chiang Mai flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Chiang Mai flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Chiang Mai flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Chiang Mai flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Chiang Mai

Have a flexible travel schedule? Discover the best time to fly to Chiang Mai from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Chiang Mai

How far ahead should I book a flight from Seattle to Chiang Mai?

To ensure you get the cheapest price possible for a flight from Seattle to Chiang Mai, you should look to book at least 44 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Seattle to Chiang Mai?

Currently, February is the cheapest month in which you can book a flight from Seattle to Chiang Mai (average of $813). Flying from Seattle to Chiang Mai in December is currently the most expensive (average of $1,728). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Seattle to Chiang Mai?

Reviews of airlines servicing Chiang Mai

Get insights into the airlines that provide service to Chiang Mai. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chiang Mai. Reviews last updated June 27, 2026.
Peruse reviews from past customers who have flown with EVA Air and China Airlines from Seattle to Chiang Mai to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.5
Very good
1,484 reviews

Crew

8.7

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
EVA Air
8.5
Very good
1,484 reviews
EVA Air
8.5
Very good
1,484 reviews

Crew

8.7

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
China Airlines
8.3
Very good
829 reviews
EVA Air
8.5
Very good
1,484 reviews

Crew

8.7

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!

Related info for your journey

Find useful and relevant information for your journey from Seattle to Chiang Mai. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Chiang Mai?

    A quick flight from Seattle to Chiang Mai can take about 20h 55m. Korean Air provides one of the quickest options available for as low as $899. There are 7190 mi between Seattle and Chiang Mai.

  • What are the cheapest airlines flying from Seattle to Chiang Mai round-trip?

    According to our current data, China Airlines ($763), and EVA Air ($853) offers the cheapest pricing from Seattle to Chiang Mai. Users have found that China Airlines is 28% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Seattle to Chiang Mai one-way?

    The cheapest airline one-way is Asiana Airlines, with whom users have recently found tickets for as low as $371. However, be on the lookout for offers from Korean Air and China Airlines, as they are both options that can get you from Seattle to Chiang Mai for a low price.

  • Where are the most common layover locations when flying from Seattle to Chiang Mai?

    Most of the time, Seattle to Chiang Mai flights that have layovers will stop in Seoul.

  • What are some popular things to do or see while on a layover in Seoul?

    Dongdaemun Market, Lotte World, and Gwanghwamun are the most popular attractions in Seoul if you're in need of something to do during your layover. Dongdaemun Market, Lotte World, and Gwanghwamun can be visited by traveling about 31.6 mi, 35.7 mi, and 30.1 mi respectively from Incheon Intl. Those looking to explore during their layover in Seoul can rent a car from Incheon Intl for about $59 per day.

  • Where are the least popular layover locations for Seattle to Chiang Mai flights?

    The least popular layover on flights from Seattle to Chiang Mai is Taipei City.

  • Can I find deals for flights from Seattle to Chiang Mai that include hotel bookings?

    Yes. In addition to deals on Seattle to Chiang Mai flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Chiang Mai?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Chiang Mai.

  • Can I find deals for business class flights from Seattle to Chiang Mai?

    Yes. Cheapflights offers flight deals from Seattle to Chiang Mai by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Chiang Mai?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Chiang Mai (average of $813). Flying from Seattle to Chiang Mai in December is currently the most expensive (average of $1,728). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Seattle to Chiang Mai

Discover the top 2 airlines that operate flights from Seattle to Chiang Mai. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$763Average$844FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$853Average$971FlexibilityNo cancel feeOn-time74%

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