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Chiang Mai

$369+ 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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CNX
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$679
(Flightnetwork)

One-way from

$369
(CrystalTravel)

Popular in

June

Cheapest in

March

Average price

$1,133
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. 17% potential increase in price ($208 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This Flightnetwork deal was found by Cheapflights users on 7/1. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/182:30 pmSEA - CNX
1 stop19h 10mAsiana Airlines
Tue 9/212:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 7/1$679
This Ovago deal was found by Cheapflights users on 7/2. 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 15mMultiple Airlines
Tue 9/168:00 pmCNX - SEA
2 stops32h 25mMultiple Airlines
Deal found 7/2$693
This Gurufare deal was found by Cheapflights users on 7/3. 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.
Sun 8/311:15 amSEA - CNX
1 stop25h 05mSTARLUX Airlines
Thu 11/204:55 pmCNX - SEA
1 stop37h 10mSTARLUX Airlines
Deal found 7/3$720
This oojo deal was found by Cheapflights users on 7/3. 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 8/311:40 amSEA - CNX
1 stop18h 40mChina Airlines
Tue 9/1611:20 amCNX - SEA
1 stop22h 00mChina Airlines
Deal found 7/3$774
This FlightHub deal was found by Cheapflights users on 7/3. 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.
Sat 10/1110:15 amSEA - CNX
1 stop40h 25mSingapore Airlines
Fri 10/1711:15 amCNX - SEA
1 stop35h 30mSingapore Airlines
Deal found 7/3$792
This Korean Air deal was found by Cheapflights users on 7/1. 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 8/185:40 pmSEA - CNX
2 stops38h 15mKorean Air
Wed 9/311:15 pmCNX - SEA
1 stop25h 25mKorean Air
Deal found 7/1$800
This Delta deal was found by Cheapflights users on 7/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/611:15 amSEA - CNX
1 stop20h 50mDelta
Mon 2/212:15 amCNX - SEA
1 stop28h 05mDelta
Deal found 7/2$828
This oojo deal was found by Cheapflights users on 7/2. 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 9/11:30 amSEA - CNX
1 stop18h 55mEVA Air
Mon 11/1711:50 amCNX - SEA
1 stop21h 20mEVA Air
Deal found 7/2$866

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 July 3, 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 8/18

2:30 pm-11:40 pm

1 stop19h 10m

Chiang Mai

Tue 9/2

12:45 am-12:30 pm

1 stop25h 45m

$679

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

4:30 pm-8:45 am

2 stops26h 15m

Chiang Mai

Tue 9/16

8:00 pm-2:25 pm

2 stops32h 25m

$693

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/31

1:15 am-4:20 pm

1 stop25h 05m

Chiang Mai

Thu 11/20

4:55 pm-3:05 pm

1 stop37h 10m

$720

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/31

1:40 am-10:20 am

1 stop18h 40m

Chiang Mai

Tue 9/16

11:20 am-7:20 pm

1 stop22h 00m

$774

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 8/18

5:40 pm-9:55 pm

2 stops38h 15m

Chiang Mai

Wed 9/3

11:15 pm-10:40 am

1 stop25h 25m

$800

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Mon 11/17

11:50 am-6:10 pm

1 stop21h 20m

$866

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

7:10 am-1:25 pm

2 stops40h 15m

Chiang Mai

Thu 11/20

3:35 pm-2:45 pm

2 stops38h 10m

$951

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Fri 8/22

2:30 pm-11:40 pm

1 stop19h 10m

$369

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 8/19

12:55 pm-9:55 pm

1 stop19h 00m

$422

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 9/2

7:28 am-9:55 pm

2 stops24h 27m

$429

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 13 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 June 27, 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 $1,010). Flying from Seattle to Chiang Mai in December is currently the most expensive (average of $1,639). 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 July 3, 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 July 3, 2025.
Peruse reviews from past customers who have flown with STARLUX Airlines, EVA Air, and Korean Air 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.
STARLUX Airlines
9.1
Wonderful
189 reviews

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.1
Wonderful
189 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
EVA Air
8.4
Very good
1,214 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,101 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
747 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Asiana Airlines
8.2
Very good
452 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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 ($679), STARLUX Airlines ($720), and China Airlines ($774) offers the cheapest pricing from Seattle to Chiang Mai. Users have found that Asiana Airlines is 32% 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 $369. However, be on the lookout for offers from Delta and Korean Air, 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, Bukchon Hanok Village, and Lotte World are the most popular attractions in Seoul if you're in need of something to do during your layover. Dongdaemun Market, Bukchon Hanok Village, and Lotte World can be visited by traveling about 31.6 mi, 30.6 mi, and 35.7 mi respectively from Incheon Intl. Those looking to explore during their layover in Seoul can rent a car from Incheon Intl for about $58 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 $1,010). Flying from Seattle to Chiang Mai in December is currently the most expensive (average of $1,639). 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$672Average$853FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$736Average$862FlexibilityNo cancel feeOn-time70%
Singapore AirlinesCheapest$779Average$1,222FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$836Average$1,009FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$865Average$1,038FlexibilityNo cancel feeOn-time74%

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