What is the cheapest airline that flies from Washington to Chiang Mai?

Korean Air is the most popular carrier operating from Washington to Chiang Mai

What airlines fly to Chiang Mai?

EVA Air, China Airlines and Korean Air are the top three most popular airlines that fly to Chiang Mai from State of Washington according to our data. EVA Air is the first choice among our users, with 57% of people opting to fly with this airline when traveling to Chiang Mai. Keep in mind that there are 3 different airlines that fly to Chiang Mai on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Washington to Chiang Mai Airport?

Prices for flights from Washington to Chiang Mai Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Washington to Chiang Mai Airport?

As of September 2026, there are 3 operators available to choose from for flights from Washington to Chiang Mai Airport.

How old do you have to be to fly from Washington to Chiang Mai Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Chiang Mai Airport.

What documentation or ID do you need to fly to Chiang Mai Airport?

The necessary travel and health documents for your Chiang Mai Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$407 Cheap Flights from Washington to Chiang Mai in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington to Chiang Mai

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:30 pm - 10:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 15m1 stop Incheon Intl

12:20 am - 11:51 amCNX Chiang Mai-SEA Seattle/Tacoma Intl

26h 31m1 stop Incheon Intl

$846Delta

Mon, Nov 9 - Sun, Nov 22

11:00 am - 10:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

20h 45m1 stop Incheon Intl

12:20 am - 9:05 amCNX Chiang Mai-SEA Seattle/Tacoma Intl

23h 45m1 stop Incheon Intl

$850Korean Air

Wed, Nov 4 - Tue, Nov 17

7:20 am - 10:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

24h 25m2 stops San Francisco Incheon Intl

12:20 am - 2:10 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

28h 50m1 stop Incheon Intl

$855Korean Air

Mon, Nov 9 - Sun, Nov 22

12:10 am - 10:25 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 15m1 stop Taipei City Taiwan Taoyuan Intl

11:25 am - 6:10 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 45m1 stop Taipei City Taiwan Taoyuan Intl

$863China Airlines

Sun, Mar 7 - Sun, Mar 14

12:10 am - 10:25 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 15m1 stop Taipei City Taiwan Taoyuan Intl

11:25 am - 7:10 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 45m1 stop Taipei City Taiwan Taoyuan Intl

$863China Airlines

Sun, Jan 17 - Thu, Mar 18

7:20 am - 10:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

24h 25m2 stops San Francisco Incheon Intl

12:20 am - 3:10 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

29h 50m2 stops Incheon Intl Los Angeles

$866Korean Air

Mon, Nov 9 - Sun, Nov 22

10:25 am - 9:50 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

32h 25m1 stop Hong Kong Intl

7:40 pm - 8:45 amCNX Chiang Mai-SEA Seattle/Tacoma Intl

28h 05m1 stop Hong Kong Intl

$876Cathay Pacific

Tue, Jan 12 - Tue, Jan 19

12:10 am - 10:35 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 25m1 stop Taipei City Taiwan Taoyuan Intl

11:50 am - 6:10 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 20m1 stop Taipei City Taiwan Taoyuan Intl

$880EVA Air

Sun, Nov 8 - Mon, Dec 7

12:30 am - 10:25 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 55m1 stop Taipei City Taiwan Taoyuan Intl

11:35 am - 7:20 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 45m1 stop Taipei City Taiwan Taoyuan Intl

$880EVA Air

Tue, Oct 6 - Thu, Oct 15

8:40 am - 11:35 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

23h 55m2 stops Vancouver Intl Incheon Intl

9:10 pm - 6:22 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

36h 12m2 stops Bangkok Suvarnabhumi Vancouver Intl

$894Multiple Airlines

Tue, Dec 1 - Tue, Dec 8

Cheap last minute flights

Enter your travel dates to find the best prices.

1:30 am - 10:25 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

18h 55m1 stop Taipei City Taiwan Taoyuan Intl

11:35 am - 6:40 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 05m1 stop Taipei City Taiwan Taoyuan Intl

$880EVA Air

Sun, Sep 27 - Tue, Oct 13

1:30 am - 10:25 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

18h 55m1 stop Taipei City Taiwan Taoyuan Intl

11:35 am - 7:20 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 45m1 stop Taipei City Taiwan Taoyuan Intl

$881EVA Air

Sun, Sep 27 - Tue, Oct 13

1:15 am - 10:20 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 05m1 stop Taipei City Taiwan Taoyuan Intl

11:55 am - 7:15 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 20m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl

$932Multiple Airlines

Sun, Sep 27 - Tue, Oct 13

1:15 am - 10:20 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 05m1 stop Taipei City Taiwan Taoyuan Intl

11:55 am - 7:15 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 20m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl

$934Multiple Airlines

Sun, Sep 27 - Tue, Oct 13

1:15 am - 10:20 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 05m1 stop Taipei City Taiwan Taoyuan Intl

10:10 am - 7:15 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

23h 05m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl

$935Multiple Airlines

Sun, Sep 27 - Tue, Oct 13

1:15 am - 10:20 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 05m1 stop Taipei City Taiwan Taoyuan Intl

11:55 am - 7:15 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 20m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl

$935Multiple Airlines

Sun, Sep 27 - Tue, Oct 13

1:15 am - 10:20 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 05m1 stop Taipei City Taiwan Taoyuan Intl

11:55 am - 7:15 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 20m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl

$965China Airlines

Sun, Sep 27 - Tue, Oct 13

1:15 am - 1:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

22h 30m2 stops Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi

11:55 am - 7:15 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 20m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl

$1,009China Airlines

Sun, Sep 27 - Tue, Oct 13

1:15 am - 1:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

22h 30m2 stops Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi

11:55 am - 7:15 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 20m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl

$1,012China Airlines

Sun, Sep 27 - Tue, Oct 13

1:30 am - 1:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

22h 15m2 stops Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi

11:55 am - 6:40 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

20h 45m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl

$1,026EVA Air

Sun, Sep 27 - Tue, Oct 13

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Delta flights from State of Washington to Chiang Mai

Our best Delta deals on State of Washington to Chiang Mai flight tickets

Delta

Nov 9

SEA12:30 pmSeattle/Tacoma Intl

19h 15m

1 stop

CNX10:45 pmChiang Mai

Nov 22

CNX12:20 amChiang Mai

26h 31m

1 stop

SEA11:51 amSeattle/Tacoma Intl

$846

Delta

Nov 8

PSC5:20 amPasco Tri Cities

26h 25m

2 stops

CNX10:45 pmChiang Mai

Nov 14

CNX12:20 amChiang Mai

38h 39m

2 stops

PSC11:59 pmPasco Tri Cities

$993

Korean Air flights from State of Washington to Chiang Mai

Our best Korean Air deals on State of Washington to Chiang Mai flight tickets

Korean Air

Nov 4

SEA11:00 amSeattle/Tacoma Intl

20h 45m

1 stop

CNX10:45 pmChiang Mai

Nov 17

CNX12:20 amChiang Mai

23h 45m

1 stop

SEA9:05 amSeattle/Tacoma Intl

$850

Korean Air

Nov 9

SEA7:20 amSeattle/Tacoma Intl

24h 25m

2 stops

CNX10:45 pmChiang Mai

Nov 22

CNX12:20 amChiang Mai

28h 50m

1 stop

SEA2:10 pmSeattle/Tacoma Intl

$855

Korean Air

Nov 9

SEA7:20 amSeattle/Tacoma Intl

24h 25m

2 stops

CNX10:45 pmChiang Mai

Nov 22

CNX12:20 amChiang Mai

29h 50m

2 stops

SEA3:10 pmSeattle/Tacoma Intl

$866

momondo Fare Finder

Use the filters below to find and compare flights from Washington to Chiang Mai that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Mon 11/9

12:30 pm-10:45 pm

1 stop19h 15m

Chiang Mai

Sun 11/22

12:20 am-11:51 am

1 stop26h 31m

$846

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Wed 11/4

11:00 am-10:45 pm

1 stop20h 45m

Chiang Mai

Tue 11/17

12:20 am-9:05 am

1 stop23h 45m

$850

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Mon 11/9

7:20 am-10:45 pm

2 stops24h 25m

Chiang Mai

Sun 11/22

12:20 am-2:10 pm

1 stop28h 50m

$855

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Sun 3/7

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Sun 3/14

11:25 am-6:10 pm

1 stop21h 45m

$863

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Sun 1/17

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Thu 3/18

11:25 am-7:10 pm

1 stop21h 45m

$863

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Mon 11/9

7:20 am-10:45 pm

2 stops24h 25m

Chiang Mai

Sun 11/22

12:20 am-3:10 pm

2 stops29h 50m

$866

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Tue 1/12

10:25 am-9:50 am

1 stop32h 25m

Chiang Mai

Tue 1/19

7:40 pm-8:45 am

1 stop28h 05m

$876

Quickest round-trip

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Sun 11/8

12:10 am-10:35 am

1 stop19h 25m

Chiang Mai

Mon 12/7

11:50 am-6:10 pm

1 stop21h 20m

$880

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Tue 10/6

12:30 am-10:25 am

1 stop19h 55m

Chiang Mai

Thu 10/15

11:35 am-7:20 pm

1 stop21h 45m

$880

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Tue 12/1

8:40 am-11:35 pm

2 stops23h 55m

Chiang Mai

Tue 12/8

9:10 pm-6:22 pm

2 stops36h 12m

$894

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from State of Washington to Chiang Mai

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Chiang Mai?

If you don’t want to visit Chiang Mai in February, then you should wait until April to fly from State of Washington, when ticket prices are also cheap, with an average price of $867.

How far in advance should I book a flight from Washington to Chiang Mai?

You are more likely to see cheaper flights to Chiang Mai from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Chiang Mai for around $1,088 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chiang Mai from State of Washington for as low as $838 on momondo.

Cheap State of Washington to Chiang Mai flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Chiang Mai

Best Price Found	$407
Fastest flight time	19h 05m
Direct flights	None

The best one-way flight to Chiang Mai from State of Washington in the past 72 hours is $407. The best round-trip flight deal from State of Washington to Chiang Mai found on momondo in the last 72 hours is $846.

The fastest flight from State of Washington to Chiang Mai takes 19h 05m

There are no direct flights from State of Washington to Chiang Mai. There are no popular flight routes from State of Washington to Chiang Mai.

Search flight deals

Frequently asked questions about flying from Washington to Chiang Mai

When did momondo last update prices for flights from Washington to Chiang Mai Airport?
Prices for flights from Washington to Chiang Mai Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington to Chiang Mai Airport?
As of September 2026, there are 3 operators available to choose from for flights from Washington to Chiang Mai Airport.
How old do you have to be to fly from Washington to Chiang Mai Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Chiang Mai Airport.
What documentation or ID do you need to fly to Chiang Mai Airport?
The necessary travel and health documents for your Chiang Mai Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from State of Washington to Chiang Mai

Compare and see reviews for airlines that fly from State of Washington to Chiang Mai with momondo

Airline	Rating	Free Cancellation	Price
Korean Air	PriceFrom $752	Free Cancellation	Rating 8.4 1,218 reviews	Search Korean Air flights
China Airlines	PriceFrom $797	Free Cancellation	Rating 8.3 847 reviews	Search China Airlines flights
EVA Air	PriceFrom $820	Free Cancellation	Rating 8.5 1,532 reviews	Search EVA Air flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Chiang Mai?

It is quick and easy to find Washington to Chiang Mai flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Chiang Mai that suits you.

Can I find flights from Washington to Chiang Mai with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Chiang Mai from Washington with this policy.

How can momondo help me find flights from Washington to Chiang Mai?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Chiang Mai from Washington.

I’m not ready to book a flight from Washington to Chiang Mai right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Chiang Mai, momondo offers a useful price alert feature which will track prices for flights to Chiang Mai from Washington and alert you when they change.

An easier way to manage your Chiang Mai trip

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Cheap flights from Washington to Chiang Mai from $407

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Chiang Mai departing on 2/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Washington to Chiang Mai

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

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Big names and deals

Filter for what you want

Filter for what you want

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Delta flights from State of Washington to Chiang Mai

Our best Delta deals on State of Washington to Chiang Mai flight tickets

Korean Air flights from State of Washington to Chiang Mai

Our best Korean Air deals on State of Washington to Chiang Mai flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Washington to Chiang Mai that are best for you.

See travel insights to Chiang Mai from

How to get the cheapest flight ticket from State of Washington to Chiang Mai

What is the cheapest month to fly to Chiang Mai?

How far in advance should I book a flight from Washington to Chiang Mai?

What is the cheapest airline that flies from Washington to Chiang Mai?

What airlines fly to Chiang Mai?

Cheap State of Washington to Chiang Mai flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Washington to Chiang Mai

Best airlines flying from State of Washington to Chiang Mai

Compare and see reviews for airlines that fly from State of Washington to Chiang Mai with momondo

Why use momondo?

An easier way to manage your Chiang Mai trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Thailand

Airports servicing Thailand

Fly your favorite airline to Chiang Mai

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Chiang Mai

List of cabin classes available on flights landing in Chiang Mai. Availability may vary depending on flight origin and airline.

Popular cities in Thailand

Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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