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Chiang Mai

$327+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CNX
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
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 August, 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 August 20, 2025.

Round-trip from

$674
(oojo)

One-way from

$327
(Trip.com)

Popular in

December

Cheapest in

March

Average price

$842
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. 9% potential increase in price ($100 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($49 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 20, 2025.

This oojo deal was found by Cheapflights users on 8/17. 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 8/17$674
This oojo deal was found by Cheapflights users on 8/18. 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.
Thu 8/282:30 pmSEA - CNX
1 stop19h 10mAsiana Airlines
Sat 9/612:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 8/18$675
This FlightHub deal was found by Cheapflights users on 8/18. 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.
Sun 8/242:30 pmSEA - CNX
1 stop19h 10mAsiana Airlines
Sat 9/612:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 8/18$681
This Travelocity deal was found by Cheapflights users on 8/19. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/92:15 pmSEA - CNX
1 stop19h 25mAsiana Airlines
Sat 9/2712:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 8/19$709
This Asiana Airlines deal was found by Cheapflights users on 8/18. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/212:30 pmSEA - CNX
1 stop19h 10mAsiana Airlines
Mon 9/812:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 8/18$724
This Ovago deal was found by Cheapflights users on 8/18. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/14:30 pmSEA - CNX
2 stops26h 50mMultiple Airlines
Tue 9/168:00 pmCNX - SEA
2 stops32h 25mMultiple Airlines
Deal found 8/18$729
This Orbitz deal was found by Cheapflights users on 8/18. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/214:30 pmSEA - CNX
2 stops28h 45mMultiple Airlines
Mon 12/227:45 pmCNX - SEA
2 stops32h 35mMultiple Airlines
Deal found 8/18$732
This oojo deal was found by Cheapflights users on 8/18. 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.
Sat 8/232:30 pmSEA - CNX
1 stop19h 10mAsiana Airlines
Sat 9/612:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 8/18$767
This FlightHub deal was found by Cheapflights users on 8/18. 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.
Fri 8/222:30 pmSEA - CNX
1 stop19h 10mAsiana Airlines
Sat 9/612:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 8/18$774
This Trip.com deal was found by Cheapflights users on 8/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/304:40 pmSEA - CNX
2 stops28h 40mMultiple Airlines
Tue 11/47:45 pmCNX - SEA
2 stops56h 35mMultiple Airlines
Deal found 8/18$775
This oojo deal was found by Cheapflights users on 8/17. 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 9/11:40 amSEA - CNX
1 stop18h 40mChina Airlines
Mon 11/175:35 pmCNX - SEA
1 stop15h 35mChina Airlines
Deal found 8/17$781

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 August 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

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

$674

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 8/28

2:30 pm-11:40 pm

1 stop19h 10m

Chiang Mai

Sat 9/6

12:45 am-12:30 pm

1 stop25h 45m

$675

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/24

2:30 pm-11:40 pm

1 stop19h 10m

Chiang Mai

Sat 9/6

12:45 am-12:30 pm

1 stop25h 45m

$681

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/24

2:30 pm-11:40 pm

1 stop19h 10m

Chiang Mai

Sun 9/7

12:45 am-12:30 pm

1 stop25h 45m

$681

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/24

2:30 pm-11:40 pm

1 stop19h 10m

Chiang Mai

Fri 9/5

12:45 am-12:30 pm

1 stop25h 45m

$681

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 9/9

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Sat 9/27

12:45 am-12:30 pm

1 stop25h 45m

$709

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 8/25

2:30 pm-11:40 pm

1 stop19h 10m

Chiang Mai

Sat 9/6

12:45 am-12:30 pm

1 stop25h 45m

$724

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 8/26

2:30 pm-11:40 pm

1 stop19h 10m

Chiang Mai

Sat 9/6

12:45 am-12:30 pm

1 stop25h 45m

$724

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/24

2:30 pm-11:40 pm

1 stop19h 10m

Chiang Mai

Mon 9/8

12:45 am-12:30 pm

1 stop25h 45m

$724

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 8/26

2:30 pm-11:40 pm

1 stop19h 10m

Chiang Mai

Sun 9/7

12:45 am-12:30 pm

1 stop25h 45m

$724

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 19 results
1
2

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 August 8, 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, September is the cheapest month in which you can book a flight from Seattle to Chiang Mai (average of $989). Flying from Seattle to Chiang Mai in December is currently the most expensive (average of $1,620). 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 August 20, 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.

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 August 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
1,232 reviews

Food

8.1

Boarding

8.4

Overall

8.4

Crew

8.6

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
EVA Air
8.4
Very good
1,232 reviews
EVA Air
8.4
Very good
1,232 reviews

Food

8.1

Boarding

8.4

Overall

8.4

Crew

8.6

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
Korean Air
8.4
Very good
1,131 reviews
EVA Air
8.4
Very good
1,232 reviews

Food

8.1

Boarding

8.4

Overall

8.4

Crew

8.6

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
China Airlines
8.3
Very good
764 reviews
EVA Air
8.4
Very good
1,232 reviews

Food

8.1

Boarding

8.4

Overall

8.4

Crew

8.6

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
Asiana Airlines
8.2
Very good
476 reviews
EVA Air
8.4
Very good
1,232 reviews

Food

8.1

Boarding

8.4

Overall

8.4

Crew

8.6

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
Singapore Airlines
8.1
Very good
1,347 reviews
EVA Air
8.4
Very good
1,232 reviews

Food

8.1

Boarding

8.4

Overall

8.4

Crew

8.6

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

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 19h 25m. Asiana Airlines provides one of the quickest options available for as low as $674. 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 ($669), China Airlines ($730), and Singapore Airlines ($779) 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 Seoul.

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

    Dongdaemun Market, Lotte World, and Bukchon Hanok Village are the most popular attractions in Seoul if you're in need of something to do during your layover. Dongdaemun Market, Lotte World, and Bukchon Hanok Village can be visited by traveling about 31.6 mi, 35.7 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 $74 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, September is the cheapest month in which you can book a flight from Seattle to Chiang Mai (average of $989). Flying from Seattle to Chiang Mai in December is currently the most expensive (average of $1,620). 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$669Average$854FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$730Average$834FlexibilityNo cancel feeOn-time70%
Singapore AirlinesCheapest$779Average$1,222FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$814Average$1,009FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$871Average$992FlexibilityNo cancel feeOn-time74%

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