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Chiang Mai

$368+ Cheap flights from Washington 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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CNX
Mar 4 — Mar 111
Wed 3/4
Wed 3/11
1 adult, Economy
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Cheap flight deals from Washington to Chiang Mai

Cheapest flights from Washington to Chiang Mai
Explore the most affordable flight options available from Washington to Chiang Mai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 2, 2026.

This FlightHub deal was found by Cheapflights users on 1/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:15 am
SEA
-
CNX
1 stop40h 20m
Singapore Airlines
Wed 9/3011:15 am
CNX
-
SEA
1 stop35h 30m
Singapore Airlines
Deal found 1/30$689
This FlightHub deal was found by Cheapflights users on 2/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:15 am
SEA
-
CNX
1 stop40h 20m
Singapore Airlines
Thu 9/245:35 pm
CNX
-
SEA
1 stop29h 10m
Singapore Airlines
Deal found 2/1$739
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/89:45 am
SEA
-
CNX
1 stop40h 00m
Singapore Airlines
Wed 4/811:15 am
CNX
-
SEA
1 stop35h 30m
Singapore Airlines
Deal found 2/2$741
This CrystalTravel deal was found by Cheapflights users on 2/1. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/181:15 am
SEA
-
CNX
1 stop19h 05m
China Airlines
Mon 5/411:20 am
CNX
-
SEA
1 stop21h 55m
China Airlines
Deal found 2/1$749
This Vliegwinkel deal was found by Cheapflights users on 1/31. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/221:10 am
SEA
-
CNX
1 stop19h 15m
China Airlines
Tue 4/711:20 am
CNX
-
SEA
1 stop21h 55m
China Airlines
Deal found 1/31$758
This oojo deal was found by Cheapflights users on 1/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/111:15 am
SEA
-
CNX
1 stop19h 05m
China Airlines
Mon 10/2611:25 am
CNX
-
SEA
1 stop21h 45m
China Airlines
Deal found 1/30$762
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1610:15 am
SEA
-
CNX
1 stop40h 20m
Singapore Airlines
Sat 4/255:35 pm
CNX
-
SEA
1 stop29h 10m
Singapore Airlines
Deal found 2/2$771
This FlightHub deal was found by Cheapflights users on 2/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:45 am
SEA
-
CNX
1 stop40h 00m
Singapore Airlines
Wed 11/184:45 pm
CNX
-
SEA
1 stop29h 25m
Singapore Airlines
Deal found 2/1$772
This FlightHub deal was found by Cheapflights users on 2/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/181:10 am
SEA
-
CNX
1 stop19h 10m
China Airlines
Mon 4/2711:20 am
CNX
-
SEA
1 stop21h 55m
China Airlines
Deal found 2/1$773
This oojo deal was found by Cheapflights users on 1/31. 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.
Tue 2/2411:30 pm
SEA
-
CNX
1 stop20h 05m
EVA Air
Thu 3/1211:50 am
CNX
-
SEA
1 stop21h 20m
EVA Air
Deal found 1/31$777
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/151:15 am
SEA
-
CNX
2 stops27h 55m
Multiple Airlines
Sat 4/2510:10 am
CNX
-
SEA
2 stops20h 00m
Multiple Airlines
Deal found 2/2$779
This SmartFares deal was found by Cheapflights users on 2/1. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/11:50 pm
PDX
-
CNX
2 stops29h 35m
Multiple Airlines
Wed 12/911:25 am
CNX
-
PDX
2 stops26h 08m
Multiple Airlines
Deal found 2/1$892

Find flight deals from Washington to Chiang Mai

Keep the following information in mind while searching for Washington to Chiang Mai flight deals. Data was last updated February 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$741
(FlightHub)

One-way from

$368
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$830
Provider with most accurate pricing for Seattle/Tacoma Intl-Chiang Mai flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Chiang Mai flights.
Search Deals
From Washington to Chiang Mai
Search Deals
One-way flight from Washington to Chiang Mai
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($126 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($58 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from 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, Cheapflights users made 2,558,603 searches. Data last updated February 2, 2026.
Use the filters below to find and compare flights from Washington to Chiang Mai that are best for you.

Fly from

Washington

Fly to

Chiang Mai

Route

Depart

Return

Price

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 4/18

1:10 am-10:20 am

1 stop19h 10m

Chiang Mai

Mon 4/27

11:20 am-7:15 pm

1 stop21h 55m

$773

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 4/16

1:15 am-4:20 pm

1 stop25h 05m

Chiang Mai

Mon 4/27

10:10 am-4:10 pm

2 stops20h 00m

$780

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 2/19

7:10 am-10:55 pm

2 stops24h 45m

Chiang Mai

Thu 2/26

12:15 am-9:00 am

1 stop23h 45m

$807

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 2/16

3:35 pm-10:55 pm

2 stops40h 20m

Chiang Mai

Thu 2/26

12:15 am-9:00 am

1 stop23h 45m

$807

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Fri 4/17

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Mon 4/27

11:35 am-7:30 pm

1 stop21h 55m

$820

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 4/16

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Mon 4/27

11:35 am-7:30 pm

1 stop21h 55m

$820

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 4/18

8:10 pm-10:20 am

2 stops24h 10m

Chiang Mai

Sun 4/26

11:20 am-7:15 pm

1 stop21h 55m

$865

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 2/17

11:45 pm-3:55 pm

1 stop25h 10m

Chiang Mai

Sat 2/28

4:55 pm-3:05 pm

1 stop37h 10m

$870

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 4/19

8:10 pm-4:20 pm

2 stops30h 10m

Chiang Mai

Sat 4/25

5:20 pm-4:10 pm

1 stop36h 50m

$871

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 2/24

11:30 pm-9:25 am

2 stops42h 55m

Chiang Mai

Thu 3/12

10:10 am-6:30 pm

2 stops22h 20m

$881

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

Showing 1-10 of 41 results
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Best time to book a flight from Washington to Chiang Mai

Have a flexible travel schedule? Discover the best time to fly to Chiang Mai from Washington 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 Washington to Chiang Mai

What is the cheapest month to book a flight from State of Washington to Chiang Mai?

Currently, March is the cheapest month in which you can book a flight from State of Washington to Chiang Mai (average of $674). Flying from State of Washington 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.

Related info for your journey

Find useful and relevant information for your journey from Washington 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 airport do you fly into for flights to Chiang Mai from Washington?

    Chiang Mai (CNX), located 1.9 mi from the city center, is the airport you fly into when you book flights from Washington to Chiang Mai.

  • How long is the flight from State of Washington to Chiang Mai?

    China Airlines, Korean Air, and EVA Air can get you from State of Washington to Chiang Mai in just under 18h 55m. Your travel time can differ by up to 5h 50m. The distance from State of Washington to Chiang Mai is about 7190 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from State of Washington to Chiang Mai one-way?

    One-way options have recently been found by users for as low as $371 on Asiana Airlines. Other airlines that offer cheap prices include Korean Air from $403 and China Airlines from $430 one-way.

  • Can I find deals for flights from Washington to Chiang Mai that include hotel bookings?

    Yes. In addition to deals on Washington to Chiang Mai flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Chiang Mai?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Chiang Mai.

  • Can I find deals for business class flights from Washington to Chiang Mai?

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Chiang Mai?

    Currently, March is the cheapest month in which you can book a flight from State of Washington to Chiang Mai (average of $674). Flying from State of Washington 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington to Chiang Mai

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Washington to Chiang Mai

Discover the top 5 airlines that operate flights from Washington 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 February 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$418Average$858FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$679Average$953FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$730Average$818FlexibilityNo cancel feeOn-time70%
Singapore AirlinesCheapest$768Average$1,200FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$853Average$967FlexibilityNo cancel feeOn-time74%

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