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Chiang Mai

$422+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CNX
Apr 21 — Apr 281
Mon 4/21
Mon 4/28
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Chiang Mai are usually found in March or October, booked 69 days in advance, depart on a Tuesday or Monday and return on a Saturday

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 April 16, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$880
(Gotogate)

One-way from

$537
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$865
Provider with most accurate pricing for Seattle/Tacoma Intl-Chiang Mai flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Chiang Mai flights.
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From Seattle/Tacoma Intl to Chiang Mai
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One-way flight from Seattle/Tacoma Intl to Chiang Mai
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Highest demand for flights based on searches. 24% potential increase in price ($349 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($70 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 16, 2025.

This oojo deal was found by Cheapflights users on 4/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/61:10 amSEA - CNX
1 stop19h 10mChina Airlines
Tue 10/1411:20 amCNX - SEA
1 stop22h 00mChina Airlines
Deal found 4/15$742
This Expedia deal was found by Cheapflights users on 4/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/74:30 pmSEA - CNX
2 stops36h 40mMultiple Airlines
Tue 10/149:10 pmCNX - SEA
2 stops31h 15mMultiple Airlines
Deal found 4/15$817
This oojo deal was found by Cheapflights users on 4/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/12:15 pmSEA - CNX
1 stop19h 25mAsiana Airlines
Mon 9/1512:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 4/15$832
This oojo deal was found by Cheapflights users on 4/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/312:10 amSEA - CNX
1 stop18h 15mEVA Air
Thu 11/2011:50 amCNX - SEA
1 stop21h 20mEVA Air
Deal found 4/14$859
This KAYAK deal was found by Cheapflights users on 4/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/15:59 pmSEA - CNX
2 stops37h 56mKorean Air
Tue 9/1611:15 pmCNX - SEA
1 stop25h 25mKorean Air
Deal found 4/16$886
This oojo deal was found by Cheapflights users on 4/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/71:15 amSEA - CNX
1 stop25h 05mSTARLUX Airlines
Thu 5/155:20 pmCNX - SEA
1 stop36h 50mSTARLUX Airlines
Deal found 4/14$891
This Gurufare deal was found by Cheapflights users on 4/14. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2610:15 amSEA - CNX
1 stop40h 25mSingapore Airlines
Sun 10/125:40 pmCNX - SEA
1 stop53h 05mSingapore Airlines
Deal found 4/14$928
This FlightHub deal was found by Cheapflights users on 4/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/124:30 pmSEA - CNX
2 stops31h 15mQatar Airways
Mon 5/2610:10 amCNX - SEA
2 stops40h 35mQatar Airways
Deal found 4/15$1,004

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 April 16, 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

Mon 10/6

1:10 am-10:20 am

1 stop19h 10m

Chiang Mai

Tue 10/14

11:20 am-7:20 pm

1 stop22h 00m

$742

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 10/12

1:10 am-1:40 pm

2 stops22h 30m

Chiang Mai

Mon 10/20

6:30 am-7:20 pm

2 stops26h 50m

$831

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Mon 9/15

12:45 am-12:30 pm

1 stop25h 45m

$832

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/31

2:10 am-10:25 am

1 stop18h 15m

Chiang Mai

Thu 11/20

11:50 am-5:40 pm

1 stop20h 50m

$860

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

5:59 pm-9:55 pm

2 stops37h 56m

Chiang Mai

Tue 9/16

11:15 pm-10:40 am

1 stop25h 25m

$886

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 10/7

10:15 am-4:40 pm

1 stop40h 25m

Chiang Mai

Tue 10/14

5:40 pm-8:45 am

1 stop53h 05m

$888

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 5/18

4:30 pm-7:10 pm

2 stops36h 40m

Chiang Mai

Tue 5/27

10:10 am-12:45 pm

2 stops40h 35m

$1,004

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 6/1

2:55 pm-4:40 pm

2 stops35h 45m

Chiang Mai

Mon 9/15

5:40 pm-2:16 pm

2 stops34h 36m

$1,244

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

1:40 am-10:20 am

1 stop18h 40m

$422

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 8/21

4:30 pm-8:45 am

2 stops26h 15m

$431

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 17 results
1
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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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Chiang Mai flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 April 11, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Chiang Mai, you should look to book at least 69 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, April is the cheapest month in which you can book a flight from Seattle to Chiang Mai (average of $1,016). Flying from Seattle to Chiang Mai in December is currently the most expensive (average of $1,678). 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 April 16, 2025.

It’s optimal to fly from Seattle to Chiang Mai in the morning. By choosing this option you can save up to 13% on the cost of your flight, compared to a flight in the afternoon.

Rainfall in Chiang Mai by month

Plan your trip to Chiang Mai by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chiang Mai ranges from 0.0 - 9.8 inches per month. September is typically the wettest month, when rainfall can reach 9.8 in. January is typically the driest time to visit Chiang Mai when rainfall is around 0.0 in.

Temperature in Chiang Mai by month

Plan your trip to Chiang Mai by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chiang Mai, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 69.8 F).

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 April 16, 2025.
STARLUX Airlines
9.1
Wonderful
154 reviews

Comfort

9.0

Overall

9.1

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
STARLUX Airlines
9.1
Wonderful
154 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Comfort

9.0

Overall

9.1

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
EVA Air
8.4
Very good
1,176 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Comfort

9.0

Overall

9.1

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Korean Air
8.4
Very good
1,064 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Comfort

9.0

Overall

9.1

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
China Airlines
8.2
Very good
729 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Comfort

9.0

Overall

9.1

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Asiana Airlines
8.2
Very good
438 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Comfort

9.0

Overall

9.1

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

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.

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

    According to our current data, Asiana Airlines ($880), EVA Air ($946), and China Airlines ($975) offers the cheapest pricing from Seattle to Chiang Mai. Users have found that Asiana Airlines is 16% 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 Singapore Airlines, with whom users have recently found tickets for as low as $551. However, be on the lookout for offers from STARLUX Airlines and Qatar Airways, 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?

    Myeongdong Cathedral, Dongdaemun Market, and Bukchon Hanok Village are the most popular attractions in Seoul if you're in need of something to do during your layover. Myeongdong Cathedral, Dongdaemun Market, and Bukchon Hanok Village can be visited by traveling about 30.4 mi, 31.6 mi, and 30.6 mi respectively from Incheon Intl. Those looking to explore during their layover in Seoul can rent a car from Incheon Intl for about $52 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, April is the cheapest month in which you can book a flight from Seattle to Chiang Mai (average of $1,016). Flying from Seattle to Chiang Mai in December is currently the most expensive (average of $1,678). 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

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Top 4 airlines flying from Seattle to Chiang Mai

Discover the top 4 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 April 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$679Average$859FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$749Average$834FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$886Average$1,125FlexibilityNo cancel feeOn-time74%
Korean AirCheapest$967Average$1,157FlexibilityNo cancel feeOn-time81%

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