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Chiang Mai

$366+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CNX
Dec 20 — Dec 271
Sat 12/20
Sat 12/27
1 adult, Economy
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Find cheap flights from Seattle to Chiang Mai with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Chiang Mai are usually found in September or February, booked 82 days in advance, depart on a Tuesday or Monday and return on a Saturday

Find 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 November 20, 2025.

This Korean Air deal was found by Cheapflights users on 11/19. 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 12/111:00 amSEA - CNX
1 stop20h 55mKorean Air
Sun 12/712:15 amCNX - SEA
1 stop23h 45mKorean Air
Deal found 11/19$807
This Korean Air deal was found by Cheapflights users on 11/19. 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 12/111:00 amSEA - CNX
1 stop20h 55mKorean Air
Mon 12/812:15 amCNX - SEA
2 stops35h 35mKorean Air
Deal found 11/19$818
This CrystalTravel deal was found by Cheapflights users on 11/19. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2412:10 amSEA - CNX
1 stop19h 15mChina Airlines
Sun 1/2511:25 amCNX - SEA
1 stop21h 45mChina Airlines
Deal found 11/19$819
This Korean Air deal was found by Cheapflights users on 11/19. 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.
Sun 11/305:59 pmSEA - CNX
2 stops37h 56mKorean Air
Tue 12/912:15 amCNX - SEA
1 stop23h 45mKorean Air
Deal found 11/19$834
This Korean Air deal was found by Cheapflights users on 11/19. 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.
Sun 11/305:59 pmSEA - CNX
2 stops37h 56mKorean Air
Mon 12/812:15 amCNX - SEA
2 stops31h 55mKorean Air
Deal found 11/19$839
This Korean Air deal was found by Cheapflights users on 11/19. 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 12/111:00 amSEA - CNX
1 stop20h 55mKorean Air
Thu 12/1812:15 amCNX - SEA
1 stop23h 45mKorean Air
Deal found 11/19$848
This Kiwi.com deal was found by Cheapflights users on 11/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2912:10 amSEA - CNX
1 stop19h 25mEVA Air
Thu 12/1811:50 amCNX - SEA
1 stop21h 20mEVA Air
Deal found 11/19$854
This Korean Air deal was found by Cheapflights users on 11/19. 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.
Sun 11/305:59 pmSEA - CNX
2 stops37h 56mKorean Air
Sun 12/712:15 amCNX - SEA
2 stops35h 35mKorean Air
Deal found 11/19$855
This Korean Air deal was found by Cheapflights users on 11/19. 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 12/111:00 amSEA - CNX
1 stop20h 55mKorean Air
Sat 2/2112:15 amCNX - SEA
2 stops33h 28mKorean Air
Deal found 11/19$857

Cheap 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 November 20, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$751
(Trip.com)

One-way from

$366
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$914
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. 12% potential increase in price ($144 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($55 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 20, 2025.
Use the filters below to find and compare flights from Seattle to Chiang Mai that are best for you.

Fly from

Seattle

Fly to

Chiang Mai

Route

Depart

Return

Price

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 12/2

11:00 am-10:55 pm

1 stop20h 55m

Chiang Mai

Mon 12/8

12:15 am-5:10 pm

2 stops31h 55m

$818

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 11/30

12:40 pm-10:55 pm

2 stops43h 15m

Chiang Mai

Tue 12/9

12:15 am-8:53 am

2 stops47h 38m

$846

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 11/30

5:59 pm-10:55 pm

2 stops37h 56m

Chiang Mai

Sun 12/7

12:15 am-8:50 pm

2 stops35h 35m

$855

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 12/1

11:00 am-10:55 pm

1 stop20h 55m

Chiang Mai

Sat 2/21

12:15 am-6:43 pm

2 stops33h 28m

$857

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 3/17

7:20 am-10:55 pm

2 stops25h 35m

Chiang Mai

Wed 3/25

12:15 am-10:00 am

1 stop23h 45m

$857

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 12/1

11:00 am-10:55 pm

1 stop20h 55m

Chiang Mai

Thu 12/11

12:15 am-10:54 pm

2 stops37h 39m

$859

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 3/2

11:00 am-10:55 pm

1 stop20h 55m

Chiang Mai

Tue 3/17

12:15 am-10:00 am

1 stop23h 45m

$860

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 3/16

12:00 pm-10:55 pm

1 stop20h 55m

Chiang Mai

Wed 3/25

12:15 am-8:31 pm

2 stops34h 16m

$862

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 3/2

7:10 am-10:55 pm

2 stops24h 45m

Chiang Mai

Sun 3/15

12:15 am-10:00 am

1 stop23h 45m

$865

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 3/15

1:10 am-10:35 am

1 stop19h 25m

Chiang Mai

Wed 3/25

11:50 am-7:10 pm

1 stop21h 20m

$884

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 18 results
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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Chiang Mai flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Chiang Mai. Price data was last updated on November 14, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Chiang Mai, you should look to book at least 82 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 $617). Flying from Seattle to Chiang Mai in June is currently the most expensive (average of $1,285). 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.

What is the cheapest time of day to fly from SEA to CNX?

Find hourly flight availability from Seattle to Chiang Mai. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 20, 2025.

It’s optimal to fly from Seattle to Chiang Mai in the morning. By choosing this option you can save up to 46% on the cost of your flight, compared to a flight in the afternoon.

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 November 20, 2025.
Peruse reviews from past customers who have flown with EVA Air, Korean 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
8.4
Very good
1,279 reviews

Boarding

8.4

Food

8.1

Entertainment

8.0

Crew

8.6

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
EVA Air
8.4
Very good
1,279 reviews
EVA Air
8.4
Very good
1,279 reviews

Boarding

8.4

Food

8.1

Entertainment

8.0

Crew

8.6

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
Korean Air
8.4
Very good
1,167 reviews
EVA Air
8.4
Very good
1,279 reviews

Boarding

8.4

Food

8.1

Entertainment

8.0

Crew

8.6

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
China Airlines
8.3
Very good
782 reviews
EVA Air
8.4
Very good
1,279 reviews

Boarding

8.4

Food

8.1

Entertainment

8.0

Crew

8.6

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
Asiana Airlines
8.2
Very good
487 reviews
EVA Air
8.4
Very good
1,279 reviews

Boarding

8.4

Food

8.1

Entertainment

8.0

Crew

8.6

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
Singapore Airlines
8.1
Very good
1,407 reviews
EVA Air
8.4
Very good
1,279 reviews

Boarding

8.4

Food

8.1

Entertainment

8.0

Crew

8.6

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.

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 $818. 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, Asiana Airlines ($660), China Airlines ($730), and Singapore Airlines ($768) offers the cheapest pricing from Seattle to Chiang Mai. Users have found that Asiana Airlines is 33% cheaper than the other options available to this destination.

  • 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 Taipei City.

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

    Taipei 101, Shilin Night Market, and Raohe Street Night Market are the most popular attractions in Taipei City if you're in need of something to do during your layover. Taipei 101, Shilin Night Market, and Raohe Street Night Market can be visited by traveling about 21.0 mi, 18.3 mi, and 21.6 mi respectively from Taipei City Taiwan Taoyuan Intl. Those looking to explore during their layover in Taipei City can rent a car from Taipei City Taiwan Taoyuan Intl for about $72 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 Seoul.

  • 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 $617). Flying from Seattle to Chiang Mai in June is currently the most expensive (average of $1,285). 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

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Top 5 airlines flying from Seattle to Chiang Mai

Discover the top 5 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 November 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$660Average$828FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$730Average$831FlexibilityNo cancel feeOn-time70%
Singapore AirlinesCheapest$768Average$1,210FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$814Average$971FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$865Average$981FlexibilityNo cancel feeOn-time74%

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