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Chiang Mai

$383+ 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 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CNX
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap 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 September 15, 2025.

Round-trip from

$702
(CrystalTravel)

One-way from

$383
(Trip.com)

Popular in

December

Cheapest in

March

Average price

$836
From Washington to Chiang Mai
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One-way flight from Washington to Chiang Mai
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Highest demand for flights based on searches. 9% potential increase in price ($104 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 15, 2025.

This CrystalTravel deal was found by Cheapflights users on 9/14. 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.
Thu 9/252:15 pmSEA - CNX
1 stop19h 25mAsiana Airlines
Sun 10/1212:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 9/14$702
This FlightHub deal was found by Cheapflights users on 9/15. 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 9/242:15 pmSEA - CNX
1 stop19h 25mAsiana Airlines
Mon 10/1312:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 9/15$707
This Asiana Airlines deal was found by Cheapflights users on 9/15. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/222:15 pmSEA - CNX
1 stop19h 25mAsiana Airlines
Wed 10/1512:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 9/15$725
This FlightHub deal was found by Cheapflights users on 9/13. 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 9/242:15 pmSEA - CNX
1 stop19h 25mAsiana Airlines
Sun 10/1212:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 9/13$729
This Asiana Airlines deal was found by Cheapflights users on 9/15. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/282:15 pmSEA - CNX
1 stop19h 25mAsiana Airlines
Mon 10/1312:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 9/15$755
This Asiana Airlines deal was found by Cheapflights users on 9/15. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/222:15 pmSEA - CNX
1 stop19h 25mAsiana Airlines
Sun 10/1212:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 9/15$779
This oojo deal was found by Cheapflights users on 9/14. 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 11/1812:10 amSEA - CNX
1 stop19h 15mChina Airlines
Thu 12/1111:25 amCNX - SEA
1 stop21h 45mChina Airlines
Deal found 9/14$787
This oojo deal was found by Cheapflights users on 9/14. 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 10/131:10 amSEA - CNX
1 stop19h 10mChina Airlines
Thu 10/3011:25 amCNX - SEA
1 stop21h 45mChina Airlines
Deal found 9/14$798
This Korean Air deal was found by Cheapflights users on 9/15. 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 9/2212:50 pmSEA - CNX
1 stop19h 05mKorean Air
Tue 10/1411:15 pmCNX - SEA
1 stop25h 25mKorean Air
Deal found 9/15$799
This Korean Air deal was found by Cheapflights users on 9/15. 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 9/227:20 amSEA - CNX
2 stops24h 35mKorean Air
Wed 10/1511:15 pmCNX - SEA
1 stop25h 25mKorean Air
Deal found 9/15$804
This Korean Air deal was found by Cheapflights users on 9/15. 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.
Thu 9/2512:50 pmSEA - CNX
1 stop19h 05mKorean Air
Tue 10/1411:15 pmCNX - SEA
1 stop25h 25mKorean Air
Deal found 9/15$807
This oojo deal was found by Cheapflights users on 9/14. 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 9/237:31 pmPDX - CNX
2 stops30h 49mSTARLUX Airlines
Tue 11/184:55 pmCNX - PDX
2 stops42h 42mSTARLUX Airlines
Deal found 9/14$896

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 September 15, 2025.
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

Mon 9/22

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Wed 10/15

12:45 am-12:30 pm

1 stop25h 45m

$725

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 9/23

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Wed 10/15

12:45 am-12:30 pm

1 stop25h 45m

$725

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 9/21

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Wed 10/15

12:45 am-12:30 pm

1 stop25h 45m

$725

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 9/28

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Wed 10/15

12:45 am-12:30 pm

1 stop25h 45m

$725

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 9/23

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Mon 10/13

12:45 am-12:30 pm

1 stop25h 45m

$755

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 9/21

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Sun 10/12

12:45 am-12:30 pm

1 stop25h 45m

$779

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 9/28

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Sun 10/12

12:45 am-12:30 pm

1 stop25h 45m

$779

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/22

12:50 pm-9:55 pm

1 stop19h 05m

Chiang Mai

Tue 10/14

11:15 pm-10:40 am

1 stop25h 25m

$799

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/22

3:45 pm-9:55 pm

2 stops40h 10m

Chiang Mai

Wed 10/15

11:15 pm-10:40 am

1 stop25h 25m

$804

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 10/21

12:50 pm-9:55 pm

1 stop19h 05m

Chiang Mai

Mon 11/24

12:15 am-9:00 am

1 stop23h 45m

$807

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 42 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, September is the cheapest month in which you can book a flight from State of Washington to Chiang Mai (average of $975). Flying from State of Washington to Chiang Mai in June is currently the most expensive (average of $1,562). 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 WA to CNX?

Find hourly flight availability from Washington 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 September 15, 2025.

When flying from State of Washington to Chiang Mai, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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?

    Asiana Airlines, Korean Air, and China Airlines can get you from State of Washington to Chiang Mai in just under 19h 25m. Your travel time can differ by up to 33h 30m. 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.

  • 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, September is the cheapest month in which you can book a flight from State of Washington to Chiang Mai (average of $975). Flying from State of Washington to Chiang Mai in June is currently the most expensive (average of $1,562). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$669Average$847FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$730Average$830FlexibilityNo cancel feeOn-time70%
Singapore AirlinesCheapest$768Average$1,210FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$814Average$1,076FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$865Average$983FlexibilityNo cancel feeOn-time74%

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