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Cheap flights from Washington to Chiang Mai from $375

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.
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0 bags

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Find the cheapest flights from Washington to Chiang Mai

Cheap round-trip flights

Enter your travel dates to find the best prices.
EVA Air Logo
1:50 am - 10:25 am
SEA
-
CNX
18h 35m1 stop
EVA Air Logo
11:35 am - 6:50 pm
CNX
-
SEA
21h 15m1 stop
$775EVA Air
Mon, May 4 - Thu, May 28
EVA Air Logo
1:30 am - 10:25 am
SEA
-
CNX
18h 55m1 stop
EVA Air Logo
11:35 am - 7:30 pm
CNX
-
SEA
21h 55m1 stop
$780EVA Air
Sun, Apr 5 - Mon, Apr 13
China Airlines Logo
1:10 am - 10:25 am
SEA
-
CNX
19h 15m1 stop
China Airlines Logo
11:25 am - 7:10 pm
CNX
-
SEA
21h 45m1 stop
$801China Airlines
Mon, Mar 9 - Thu, Mar 12
China Airlines Logo
1:15 am - 10:20 am
SEA
-
CNX
19h 05m1 stop
China Airlines Logo
11:20 am - 7:15 pm
CNX
-
SEA
21h 55m1 stop
$805China Airlines
Tue, Apr 7 - Sat, Apr 18
Singapore Airlines Logo
10:15 am - 4:40 pm
SEA
-
CNX
40h 25m1 stop
Singapore Airlines Logo
5:40 pm - 8:45 am
CNX
-
SEA
29h 05m1 stop
$808Singapore Airlines
Sun, Apr 5 - Mon, Apr 13
Singapore Airlines Logo
8:45 am - 3:45 pm
SEA
-
CNX
40h 00m1 stop
Singapore Airlines Logo
4:45 pm - 7:10 am
CNX
-
SEA
29h 25m1 stop
$819Singapore Airlines
Sat, Feb 28 - Sat, Mar 7
Korean Air Logo
7:58 pm - 10:55 pm
PDX
-
CNX
36h 57m2 stops
Korean Air Logo
12:15 am - 1:12 pm
CNX
-
PDX
26h 57m2 stops
$869Korean Air
Sun, Mar 15 - Wed, Mar 18
Multiple Airlines Logo
5:35 pm - 10:25 am
PDX
-
CNX
25h 50m2 stops
Multiple Airlines Logo
11:25 am - 10:46 pm
CNX
-
PDX
26h 21m2 stops
$898Multiple Airlines
Sun, Jan 18 - Thu, Jan 29
Korean Air Logo
7:10 am - 10:55 pm
PDX
-
CNX
24h 45m2 stops
Korean Air Logo
12:15 am - 12:11 pm
CNX
-
PDX
26h 56m2 stops
$902Korean Air
Thu, Feb 26 - Sat, Mar 7
Multiple Airlines Logo
4:51 pm - 10:25 am
PDX
-
CNX
26h 34m2 stops
Multiple Airlines Logo
11:25 am - 10:46 pm
CNX
-
PDX
26h 21m2 stops
$948Multiple Airlines
Tue, Jan 13 - Tue, Jan 20

EVA Air flights from State of Washington to Chiang Mai

Our best EVA Air deals on State of Washington to Chiang Mai flight tickets
EVA Air
May 4
SEA1:50 amSeattle/Tacoma Intl
18h 35m
1 stop
CNX10:25 amChiang Mai
May 28
CNX11:35 amChiang Mai
21h 15m
1 stop
SEA6:50 pmSeattle/Tacoma Intl
$775
Find similar
EVA Air
Apr 5
SEA1:30 amSeattle/Tacoma Intl
18h 55m
1 stop
CNX10:25 amChiang Mai
Apr 13
CNX11:35 amChiang Mai
21h 55m
1 stop
SEA7:30 pmSeattle/Tacoma Intl
$780
Find similar
EVA Air
Apr 5
SEA1:30 amSeattle/Tacoma Intl
18h 55m
1 stop
CNX10:25 amChiang Mai
Apr 16
CNX11:35 amChiang Mai
21h 15m
1 stop
SEA6:50 pmSeattle/Tacoma Intl
$788
Find similar

Singapore Airlines flights from State of Washington to Chiang Mai

Our best Singapore Airlines deals on State of Washington to Chiang Mai flight tickets
Singapore Airlines
Apr 5
SEA10:15 amSeattle/Tacoma Intl
40h 25m
1 stop
CNX4:40 pmChiang Mai
Apr 13
CNX5:40 pmChiang Mai
29h 05m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$808
Find similar
Singapore Airlines
Feb 28
SEA8:45 amSeattle/Tacoma Intl
40h 00m
1 stop
CNX3:45 pmChiang Mai
Mar 7
CNX4:45 pmChiang Mai
29h 25m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$819
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington 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, momondo users made 832,500 searches. Data last updated December 15, 2025.
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

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 5/4

1:50 am-10:25 am

1 stop18h 35m

Chiang Mai

Thu 5/28

11:35 am-6:50 pm

1 stop21h 15m

$775

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 4/5

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Mon 4/13

11:35 am-7:30 pm

1 stop21h 55m

$780

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 3/9

1:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Thu 3/12

11:25 am-7:10 pm

1 stop21h 45m

$801

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 4/7

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Sat 4/18

11:20 am-7:15 pm

1 stop21h 55m

$805

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 4/5

10:15 am-4:40 pm

1 stop40h 25m

Chiang Mai

Mon 4/13

5:40 pm-8:45 am

1 stop29h 05m

$808

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 2/28

8:45 am-3:45 pm

1 stop40h 00m

Chiang Mai

Sat 3/7

4:45 pm-7:10 am

1 stop29h 25m

$819

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Sun 3/15

7:58 pm-10:55 pm

2 stops36h 57m

Chiang Mai

Wed 3/18

12:15 am-1:12 pm

2 stops26h 57m

$869

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Sun 1/18

5:35 pm-10:25 am

2 stops25h 50m

Chiang Mai

Thu 1/29

11:25 am-10:46 pm

2 stops26h 21m

$898

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Thu 2/26

7:10 am-10:55 pm

2 stops24h 45m

Chiang Mai

Sat 3/7

12:15 am-12:11 pm

2 stops26h 56m

$902

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Tue 1/13

4:51 pm-10:25 am

2 stops26h 34m

Chiang Mai

Tue 1/20

11:25 am-10:46 pm

2 stops26h 21m

$948

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chiang Mai from

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

What is the cheapest month to fly to Chiang Mai?

If you don’t want to visit Chiang Mai in September, then you should wait until March to fly from State of Washington, when ticket prices are also cheap, with an average price of $802.

What is the cheapest day to depart on your flight to Chiang Mai?

The cheapest day to depart from State of Washington to Chiang Mai is on a Tuesday. Travelers who choose to depart for Chiang Mai on a Tuesday will often find tickets for as low as $882. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from State of Washington to Chiang Mai for around $1,415.

What is the cheapest time of day to depart on your flight to Chiang Mai?

Flying to Chiang Mai from State of Washington in the morning is the least expensive time of day to depart. momondo users have found prices as low as $929 when looking at flights departing in the morning. Flights to Chiang Mai are more costly in the evening, with an average ticket price of $1,057. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight 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 $1,005 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 $776 on momondo.

Can stopping save me money on State of Washington to Chiang Mai flights?

You could potentially save up to 28% on your flight if you consider stops on a State of Washington to Chiang Mai flight.

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

Fastest flight time

20h 05m

Direct flights

None
The fastest flight from State of Washington to Chiang Mai takes 20h 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

  • 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?

  • 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
Asiana AirlinesPriceFrom $673Free CancellationRating
8.2
493 reviews
Search Asiana Airlines flights
China AirlinesPriceFrom $730Free CancellationRating
8.3
791 reviews
Search China Airlines flights
Korean AirPriceFrom $752Free CancellationRating
8.4
1,186 reviews
Search Korean Air flights
Singapore AirlinesPriceFrom $768Free CancellationRating
8.1
1,413 reviews
Search Singapore Airlines flights
EVA AirPriceFrom $862Free CancellationRating
8.5
1,297 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.

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