$506+ 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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CNX
May 4 — May 111
Round-trip
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”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Chiang Mai
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Best
Last-minute
One-way
Cheapest flights from Seattle to Chiang MaiExplore 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 4, 2026.
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 4, 2026.
This oojo deal was found by Cheapflights users on 3/31. 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 10/241:10 am
SEA
- CNX
1 stop19h 15m
China Airlines
Tue 12/2211:25 am
CNX
- SEA
1 stop21h 45m
China Airlines
Deal found 3/31![China Airlines logo]()
$832
This FlightHub deal was found by Cheapflights users on 3/31. 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 10/259:40 pm
SEA
- CNX
2 stops46h 45m
Multiple Airlines
Tue 12/2211:25 am
CNX
- SEA
1 stop21h 45m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$850
This FlightHub deal was found by Cheapflights users on 3/31. 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 10/1110:15 am
SEA
- CNX
1 stop40h 20m
Singapore Airlines
Fri 10/2311:30 am
CNX
- SEA
1 stop35h 15m
Singapore Airlines
Deal found 3/31![Singapore Airlines logo]()
$861
This Trip.com deal was found by Cheapflights users on 4/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/141:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Wed 12/911:50 am
CNX
- SEA
1 stop21h 20m
EVA Air
Deal found 4/3![EVA Air logo]()
$885
This oojo deal was found by Cheapflights users on 4/3. 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 4/261:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Tue 5/1911:35 am
CNX
- SEA
1 stop21h 55m
EVA Air
Deal found 4/3![EVA Air logo]()
$892
This Justfly.com deal was found by Cheapflights users on 4/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/271:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Tue 5/1911:35 am
CNX
- SEA
1 stop21h 55m
EVA Air
Deal found 4/3![EVA Air logo]()
$899
This Justfly.com deal was found by Cheapflights users on 4/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/122:10 am
SEA
- CNX
1 stop18h 15m
EVA Air
Wed 9/211:35 am
CNX
- SEA
1 stop22h 05m
EVA Air
Deal found 4/3![EVA Air logo]()
$911
This FlightHub deal was found by Cheapflights users on 4/3. 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.
Mon 4/271:30 am
SEA
- CNX
1 stop18h 55m
Multiple Airlines
Tue 5/1911:35 am
CNX
- SEA
2 stops38h 55m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$916
This oojo deal was found by Cheapflights users on 4/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/181:15 am
SEA
- CNX
1 stop19h 05m
China Airlines
Mon 12/1411:25 am
CNX
- SEA
1 stop21h 45m
China Airlines
Deal found 4/1![China Airlines logo]()
$930
Best flights from Seattle to Chiang MaiDiscover carefully curated flight deals from Seattle to Chiang Mai that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 4, 2026.
Discover carefully curated flight deals from Seattle to Chiang Mai that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 4, 2026.
This EVA Air deal was found by Cheapflights users on 3/29. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/191:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Wed 9/2311:35 am
CNX
- SEA
1 stop22h 05m
EVA Air
Deal found 3/29![EVA Air logo]()
$995
This EVA Air deal was found by Cheapflights users on 4/2. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/271:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Mon 5/118:00 pm
CNX
- SEA
2 stops37h 30m
EVA Air
Deal found 4/2![EVA Air logo]()
$1,053
This EVA Air deal was found by Cheapflights users on 4/2. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2312:30 am
SEA
- CNX
2 stops23h 15m
EVA Air
Sat 5/911:35 am
CNX
- SEA
1 stop21h 15m
EVA Air
Deal found 4/2![EVA Air logo]()
$1,142
This EVA Air deal was found by Cheapflights users on 4/2. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2512:30 am
SEA
- CNX
2 stops23h 15m
EVA Air
Fri 5/811:35 am
CNX
- SEA
1 stop21h 55m
EVA Air
Deal found 4/2![EVA Air logo]()
$1,142
This EVA Air deal was found by Cheapflights users on 4/3. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/3012:50 am
SEA
- CNX
2 stops44h 25m
EVA Air
Tue 5/1911:55 am
CNX
- SEA
2 stops20h 55m
EVA Air
Deal found 4/3![EVA Air logo]()
$1,183
This FlightHub deal was found by Cheapflights users on 3/29. 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 7/252:10 am
SEA
- CNX
2 stops27h 00m
EVA Air
Sun 8/98:00 pm
CNX
- SEA
2 stops37h 50m
EVA Air
Deal found 3/29![EVA Air logo]()
$1,377
Last-minute flights from Seattle to Chiang MaiDiscover last-minute flight deals from Seattle to Chiang Mai. Data last updated April 4, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Chiang Mai. Data last updated April 4, 2026 and is based on user searches.
This KAYAK deal was found by Cheapflights users on 4/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/221:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Tue 5/1211:35 am
CNX
- SEA
1 stop21h 55m
EVA Air
Deal found 4/2![EVA Air logo]()
$940
This Justfly.com deal was found by Cheapflights users on 4/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/251:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Tue 5/1911:35 am
CNX
- SEA
1 stop21h 55m
EVA Air
Deal found 4/3![EVA Air logo]()
$937
This FlightHub deal was found by Cheapflights users on 4/3. 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 4/251:30 am
SEA
- CNX
1 stop18h 55m
Multiple Airlines
Tue 5/1911:35 am
CNX
- SEA
2 stops38h 55m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$954
This oojo deal was found by Cheapflights users on 4/3. 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 4/261:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Tue 5/1911:35 am
CNX
- SEA
1 stop21h 55m
EVA Air
Deal found 4/3![EVA Air logo]()
$892
This KAYAK deal was found by Cheapflights users on 4/3. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/261:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Thu 5/2111:35 am
CNX
- SEA
1 stop21h 55m
EVA Air
Deal found 4/3![EVA Air logo]()
$934
This Justfly.com deal was found by Cheapflights users on 4/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/261:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Wed 5/2011:35 am
CNX
- SEA
1 stop21h 55m
EVA Air
Deal found 4/3![EVA Air logo]()
$960
This Justfly.com deal was found by Cheapflights users on 4/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/271:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Tue 5/1911:35 am
CNX
- SEA
1 stop21h 55m
EVA Air
Deal found 4/3![EVA Air logo]()
$899
This FlightHub deal was found by Cheapflights users on 4/3. 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.
Mon 4/271:30 am
SEA
- CNX
1 stop18h 55m
Multiple Airlines
Tue 5/1911:35 am
CNX
- SEA
2 stops38h 55m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$916
This EVA Air deal was found by Cheapflights users on 4/2. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/271:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Tue 5/1211:35 am
CNX
- SEA
1 stop21h 55m
EVA Air
Deal found 4/2![EVA Air logo]()
$943
This Justfly.com deal was found by Cheapflights users on 4/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/278:05 pm
SEA
- CNX
2 stops24h 20m
Multiple Airlines
Tue 5/1911:35 am
CNX
- SEA
1 stop21h 55m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$948
This Justfly.com deal was found by Cheapflights users on 4/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/275:58 pm
SEA
- CNX
2 stops26h 27m
Multiple Airlines
Mon 5/1811:35 am
CNX
- SEA
2 stops38h 55m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$967
One-way flights from Seattle to Chiang MaiSearch for one-way flight options from Seattle to Chiang Mai. Find affordable one-way fares based on user searches. Data last updated April 4, 2026.
Search for one-way flight options from Seattle to Chiang Mai. Find affordable one-way fares based on user searches. Data last updated April 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Sun 5/312:55 am
SEA
- CNX
3 stops48h 55m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$506
This oojo deal was found by Cheapflights users on 3/31. 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 5/31:15 am
SEA
- CNX
1 stop25h 05m
STARLUX Airlines
Deal found 3/31![STARLUX Airlines logo]()
$518
This SmartFares deal was found by Cheapflights users on 4/3. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/161:30 am
SEA
- CNX
1 stop18h 55m
EVA Air
Deal found 4/3![EVA Air logo]()
$519
This Justfly.com deal was found by Cheapflights users on 4/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/37:04 pm
SEA
- CNX
2 stops25h 21m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$542
This Trip.com deal was found by Cheapflights users on 4/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/161:15 am
SEA
- CNX
2 stops22h 25m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$546
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Mon 6/16:50 pm
SEA
- CNX
3 stops59h 30m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$687
This oojo deal was found by Cheapflights users on 4/2. 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.
Sat 5/21:15 am
SEA
- CNX
1 stop19h 05m
China Airlines
Deal found 4/2![China Airlines logo]()
$727
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 5/3011:08 pm
SEA
- CNX
3 stops44h 37m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$728
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Sun 5/3111:08 pm
SEA
- CNX
3 stops44h 37m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$733
This FlightHub deal was found by Cheapflights users on 4/3. 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.
Wed 7/12:10 am
SEA
- CNX
1 stop18h 15m
EVA Air
Deal found 4/3![EVA Air logo]()
$750
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Tue 6/211:08 pm
SEA
- CNX
3 stops44h 37m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$755
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 April 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $885 (Trip.com) |
One-way from | $506 (Kiwi.com) |
Popular in | December |
Cheapest in | September |
Average price | $882 |
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 4, 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
Cheapest round-trip
Quickest round-trip
SeattleChiang Mai
SEA - CNX
SEACNX
Seattle/Tacoma Intl
Sat 9/19
1:30 am-10:25 am
1 stop18h 55m
Chiang Mai
Wed 9/23
11:35 am-7:40 pm
1 stop22h 05m
$995
SeattleChiang Mai
SEA - CNX
SEACNX
Seattle/Tacoma Intl
Mon 4/27
1:30 am-10:25 am
1 stop18h 55m
Chiang Mai
Mon 5/11
8:00 pm-7:30 pm
2 stops37h 30m
$1,053
SeattleChiang Mai
SEA - CNX
SEACNX
Seattle/Tacoma Intl
Thu 4/23
12:30 am-1:45 pm
2 stops23h 15m
Chiang Mai
Sat 5/9
11:35 am-6:50 pm
1 stop21h 15m
$1,142
SeattleChiang Mai
SEA - CNX
SEACNX
Seattle/Tacoma Intl
Sat 4/25
12:30 am-1:45 pm
2 stops23h 15m
Chiang Mai
Fri 5/8
11:35 am-7:30 pm
1 stop21h 55m
$1,142
SeattleChiang Mai
SEA - CNX
SEACNX
Seattle/Tacoma Intl
Thu 4/30
12:50 am-11:15 am
2 stops44h 25m
Chiang Mai
Tue 5/19
11:55 am-6:50 pm
2 stops20h 55m
$1,183
SeattleChiang Mai
SEA - CNX
SEACNX
Seattle/Tacoma Intl
Sat 7/25
2:10 am-7:10 pm
2 stops27h 00m
Chiang Mai
Sun 8/9
8:00 pm-7:50 pm
2 stops37h 50m
$1,377
Cheapest one-way
SeattleChiang Mai
SEA - CNX
SEACNX
Seattle/Tacoma Intl
Sun 5/3
7:04 pm-3:15 pm
3 stops30h 11m
$625
SeattleChiang Mai
SEA - CNX
SEACNX
Seattle/Tacoma Intl
Sat 5/2
1:15 am-10:20 am
1 stop19h 05m
$727
SeattleChiang Mai
SEA - CNX
SEACNX
Seattle/Tacoma Intl
Sat 5/30
11:08 pm-9:45 am
3 stops44h 37m
$728
Quickest one-way
SeattleChiang Mai
SEA - CNX
SEACNX
Seattle/Tacoma Intl
Wed 7/1
2:10 am-10:25 am
1 stop18h 15m
$750
Showing 1-10 of 16 resultsSorted by cheapest first
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.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
- 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.
SEA-CNX
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 2, 2026.
To ensure you get the cheapest price possible for a flight from Seattle to Chiang Mai, you should look to book at least 35 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 $674). Flying from Seattle to Chiang Mai in June is currently the most expensive (average of $1,067). 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 April 4, 2026.
Peruse reviews from past customers who have flown with EVA Air,Korean Air, andChina 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.
Food
8.1
Boarding
8.4
Entertainment
8.0
Crew
8.7
Comfort
8.3
Overall
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
TPE - SFO
Food
8.1
Boarding
8.4
Entertainment
8.0
Crew
8.7
Comfort
8.3
Overall
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
TPE - SFO
Food
8.1
Boarding
8.4
Entertainment
8.0
Crew
8.7
Comfort
8.3
Overall
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
TPE - SFO
Food
8.1
Boarding
8.4
Entertainment
8.0
Crew
8.7
Comfort
8.3
Overall
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
TPE - SFO
Food
8.1
Boarding
8.4
Entertainment
8.0
Crew
8.7
Comfort
8.3
Overall
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
TPE - SFO
Food
8.1
Boarding
8.4
Entertainment
8.0
Crew
8.7
Comfort
8.3
Overall
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
TPE - SFO
Related info for your journey
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Top 5 airlines flying from Seattle to Chiang Mai
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$418 | Average$858 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$675 | Average$951 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$736 | Average$819 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$768 | Average$1,094 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$853 | Average$958 | FlexibilityNo cancel fee | On-time74% |