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Chiang Mai

$411+ 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 1/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CNX
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 December 18, 2025.

This oojo deal was found by Cheapflights users on 12/17. 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.
Thu 12/2512:10 amSEA - CNX
1 stop19h 25mEVA Air
Thu 1/111:50 amCNX - SEA
1 stop20h 40mEVA Air
Deal found 12/17$1,565
This oojo deal was found by Cheapflights users on 12/17. 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 12/225:50 pmPDX - CNX
2 stops25h 45mEVA Air
Tue 12/3011:50 amCNX - PDX
2 stops33h 28mEVA Air
Deal found 12/17$2,104
This CheapOair deal was found by Cheapflights users on 12/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/213:59 pmPDX - CNX
2 stops32h 56mMultiple Airlines
Tue 12/239:40 pmCNX - PDX
2 stops26h 35mMultiple Airlines
Deal found 12/17$2,211
This KAYAK deal was found by Cheapflights users on 12/17. 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.
Mon 12/229:45 pmPDX - CNX
2 stops51h 10mMultiple Airlines
Tue 12/304:55 pmCNX - PDX
2 stops46h 17mMultiple Airlines
Deal found 12/17$2,254
This CheapOair deal was found by Cheapflights users on 12/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:00 amPDX - CNX
3 stops36h 05mChina Eastern
Tue 12/304:25 pmCNX - PDX
3 stops40h 50mChina Eastern
Deal found 12/17$2,360
This oojo deal was found by Cheapflights users on 12/16. 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 12/2212:10 amSEA - CNX
1 stop19h 15mChina Airlines
Sun 1/411:25 amCNX - SEA
1 stop21h 45mChina Airlines
Deal found 12/16$2,422
This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/227:30 pmPDX - CNX
2 stops36h 25mDelta
Mon 12/2912:15 amCNX - PDX
2 stops36h 44mDelta
Deal found 12/16$2,514
This oojo deal was found by Cheapflights users on 12/17. 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 12/2311:30 pmSEA - CNX
2 stops30h 30mEVA Air
Sun 1/411:50 amCNX - SEA
2 stops34h 17mEVA Air
Deal found 12/17$2,714
This CheapOair deal was found by Cheapflights users on 12/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2311:45 pmSEA - CNX
1 stop25h 10mMultiple Airlines
Sun 1/49:40 pmCNX - SEA
2 stops31h 51mMultiple Airlines
Deal found 12/18$3,971
This Korean Air deal was found by Cheapflights users on 12/18. 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.
Tue 12/2311:00 amSEA - CNX
1 stop20h 55mKorean Air
Sat 1/312:15 amCNX - SEA
1 stop28h 05mKorean Air
Deal found 12/18$5,372

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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$739
(CrystalTravel)

One-way from

$431
(oojo)

Popular in

December

Cheapest in

September

Average price

$1,662
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. 12% potential increase in price ($148 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($61 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 18, 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 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

Sun 3/1

11:30 am-10:55 pm

1 stop20h 25m

Chiang Mai

Sun 3/8

12:15 am-10:00 am

2 stops47h 45m

$809

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 1/1

11:30 pm-10:35 am

1 stop20h 05m

Chiang Mai

Thu 1/22

12:10 pm-6:10 pm

2 stops21h 00m

$843

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 1/3

11:30 pm-10:35 am

1 stop20h 05m

Chiang Mai

Tue 1/20

9:25 am-6:10 pm

2 stops23h 45m

$856

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 2/28

12:10 am-10:35 am

1 stop19h 25m

Chiang Mai

Fri 3/6

11:50 am-6:10 pm

1 stop21h 20m

$856

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Wed 3/4

6:25 am-10:55 pm

2 stops25h 30m

Chiang Mai

Mon 3/9

12:15 am-1:11 pm

2 stops26h 56m

$863

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-10:23 pm

2 stops36h 08m

$869

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 1/22

11:30 pm-1:45 pm

2 stops23h 15m

Chiang Mai

Thu 1/29

12:10 pm-6:10 pm

2 stops21h 00m

$879

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 1/1

11:30 pm-10:35 am

1 stop20h 05m

Chiang Mai

Wed 1/14

9:40 pm-6:10 pm

2 stops35h 30m

$882

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Wed 3/4

9:48 pm-10:25 am

2 stops45h 37m

Chiang Mai

Tue 3/10

11:25 am-9:42 am

2 stops36h 17m

$893

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 36 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, February is the cheapest month in which you can book a flight from State of Washington to Chiang Mai (average of $670). Flying from State of Washington to Chiang Mai in June is currently the most expensive (average of $1,285). 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 December 18, 2025.

A simple way to save on the total cost of your ticket is to fly from State of Washington to Chiang Mai at noon. If you’re flexible enough to do this you can expect to save up to 78% on your trip compared to booking a flight in the afternoon.

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, Delta, and EVA Air can get you from State of Washington to Chiang Mai in just under 19h 15m. Your travel time can differ by up to 1h 10m. 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, February is the cheapest month in which you can book a flight from State of Washington to Chiang Mai (average of $670). Flying from State of Washington to Chiang Mai in June is currently the most expensive (average of $1,285). 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$673Average$883FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$730Average$819FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$752Average$1,011FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$768Average$1,210FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$862Average$972FlexibilityNo cancel feeOn-time74%

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