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Chiang Mai

$374+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CNX
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$679
(oojo)

One-way from

$374
(oojo)

Popular in

June

Cheapest in

March

Average price

$1,472
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. 17% potential increase in price ($210 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This oojo deal was found by Cheapflights users on 6/12. 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 9/12:15 pmSEA - CNX
1 stop19h 25mAsiana Airlines
Mon 9/1512:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 6/12$679
This FlightHub deal was found by Cheapflights users on 6/11. 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 8/311:15 amSEA - CNX
1 stop25h 05mSTARLUX Airlines
Tue 9/165:20 pmCNX - SEA
1 stop36h 50mSTARLUX Airlines
Deal found 6/11$766
This Trip.com deal was found by Cheapflights users on 6/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/304:55 pmPDX - CNX
2 stops39h 00mKorean Air
Sat 9/1311:15 pmCNX - PDX
2 stops28h 04mKorean Air
Deal found 6/11$790
This Trip.com deal was found by Cheapflights users on 6/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1012:10 amSEA - CNX
1 stop19h 15mChina Airlines
Tue 11/2511:25 amCNX - SEA
1 stop21h 50mChina Airlines
Deal found 6/11$796
This Expedia deal was found by Cheapflights users on 6/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/113:40 pmSEA - CNX
2 stops50h 40mMultiple Airlines
Tue 11/257:45 pmCNX - SEA
2 stops32h 35mMultiple Airlines
Deal found 6/11$821
This FlightHub deal was found by Cheapflights users on 6/12. 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 10/1110:15 amSEA - CNX
1 stop40h 25mSingapore Airlines
Fri 10/1711:15 amCNX - SEA
1 stop35h 30mSingapore Airlines
Deal found 6/12$831
This oojo deal was found by Cheapflights users on 6/11. 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 11/1111:00 amSEA - CNX
1 stop21h 05mKorean Air
Mon 11/2412:15 amCNX - SEA
1 stop23h 45mKorean Air
Deal found 6/11$844
This oojo deal was found by Cheapflights users on 6/11. 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 9/11:30 amSEA - CNX
1 stop18h 55mEVA Air
Mon 11/1711:50 amCNX - SEA
1 stop21h 20mEVA Air
Deal found 6/11$865
This oojo deal was found by Cheapflights users on 6/11. 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 11/103:30 pmPDX - CNX
2 stops27h 55mChina Airlines
Wed 12/311:25 amCNX - PDX
2 stops26h 54mChina Airlines
Deal found 6/11$870
This Delta deal was found by Cheapflights users on 6/11. 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.
Tue 11/1111:15 amSEA - CNX
1 stop20h 50mDelta
Sun 11/2312:15 amCNX - SEA
1 stop28h 05mDelta
Deal found 6/11$880
This FlightHub deal was found by Cheapflights users on 6/12. 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 9/239:30 pmPDX - CNX
2 stops28h 50mSTARLUX Airlines
Tue 9/305:20 pmCNX - PDX
2 stops41h 05mSTARLUX Airlines
Deal found 6/12$897
This FlightHub deal was found by Cheapflights users on 6/11. 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 7/36:05 amSEA - CNX
2 stops41h 20mChina Eastern
Sat 7/192:55 pmCNX - SEA
2 stops39h 56mChina Eastern
Deal found 6/11$951

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 June 12, 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 9/1

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Mon 9/15

12:45 am-12:30 pm

1 stop25h 45m

$679

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/31

1:15 am-4:20 pm

1 stop25h 05m

Chiang Mai

Tue 9/16

5:20 pm-4:10 pm

1 stop36h 50m

$766

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Sat 8/30

4:55 pm-9:55 pm

2 stops39h 00m

Chiang Mai

Sat 9/13

11:15 pm-1:19 pm

2 stops28h 04m

$790

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Tue 9/16

11:15 pm-12:30 pm

1 stop27h 15m

$857

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Mon 11/17

11:50 am-6:10 pm

1 stop21h 20m

$865

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Mon 11/10

3:30 pm-10:25 am

2 stops27h 55m

Chiang Mai

Wed 12/3

11:25 am-11:19 pm

2 stops26h 54m

$870

PortlandChiang Mai

PDX - CNX

PDXCNX

Portland

Tue 9/23

9:30 pm-4:20 pm

2 stops28h 50m

Chiang Mai

Tue 9/30

5:20 pm-8:25 pm

2 stops41h 05m

$897

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

7:00 am-10:20 am

2 stops37h 20m

Chiang Mai

Tue 9/16

11:20 am-7:20 pm

1 stop22h 00m

$932

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 9/2

7:28 am-9:55 pm

2 stops24h 27m

Chiang Mai

Sun 11/16

12:15 am-9:00 am

1 stop23h 45m

$939

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 7/3

6:05 am-1:25 pm

2 stops41h 20m

Chiang Mai

Sat 7/19

2:55 pm-4:51 pm

2 stops39h 56m

$951

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 32 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, April is the cheapest month in which you can book a flight from State of Washington to Chiang Mai (average of $1,012). Flying from State of Washington to Chiang Mai in December is currently the most expensive (average of $1,655). 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 June 12, 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.

Rainfall in Chiang Mai by month

Plan your trip to Chiang Mai by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chiang Mai ranges from 0.0 - 9.8 inches per month. September is typically the wettest month, when rainfall can reach 9.8 in. January is typically the driest time to visit Chiang Mai when rainfall is around 0.0 in.

Temperature in Chiang Mai by month

Plan your trip to Chiang Mai by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chiang Mai, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 69.8 F).

Reviews of airlines servicing Chiang Mai

Get insights into the airlines that provide service to Chiang Mai. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chiang Mai. Reviews last updated June 12, 2025.
To help decide which airline to fly from Washington to Chiang Mai, see what other customers have to say about STARLUX Airlines, EVA Air and Korean Air. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
177 reviews

Food

8.8

Overall

9.1

Comfort

9.0

Entertainment

8.9

Boarding

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.1
Wonderful
177 reviews
STARLUX Airlines
9.1
Wonderful
177 reviews

Food

8.8

Overall

9.1

Comfort

9.0

Entertainment

8.9

Boarding

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
EVA Air
8.4
Very good
1,202 reviews
STARLUX Airlines
9.1
Wonderful
177 reviews

Food

8.8

Overall

9.1

Comfort

9.0

Entertainment

8.9

Boarding

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,088 reviews
STARLUX Airlines
9.1
Wonderful
177 reviews

Food

8.8

Overall

9.1

Comfort

9.0

Entertainment

8.9

Boarding

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Japan Airlines
8.3
Very good
1,489 reviews
STARLUX Airlines
9.1
Wonderful
177 reviews

Food

8.8

Overall

9.1

Comfort

9.0

Entertainment

8.9

Boarding

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
738 reviews
STARLUX Airlines
9.1
Wonderful
177 reviews

Food

8.8

Overall

9.1

Comfort

9.0

Entertainment

8.9

Boarding

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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.

  • 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 $374 on Asiana Airlines. Other airlines that offer cheap prices include China Airlines from $450 and Korean Air from $457 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, April is the cheapest month in which you can book a flight from State of Washington to Chiang Mai (average of $1,012). Flying from State of Washington to Chiang Mai in December is currently the most expensive (average of $1,655). 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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$672Average$851FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$736Average$862FlexibilityNo cancel feeOn-time70%
Singapore AirlinesCheapest$779Average$1,222FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$836Average$1,092FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$865Average$1,046FlexibilityNo cancel feeOn-time74%

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