$550 Cheap Flights from Seattle (SEA) to Chiang Rai (CEI)

View $550 flight on Thu, Nov 6, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Chiang Rai Intl. Airport (CEI)

Cheap Flights from Seattle to Chiang Rai (SEA-CEI)

Prices were available within the past 7 days and start at $550 for one-way flights and $975 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

EVA Airways
Mon, Sep 22 - Mon, Oct 6
SEA
Seattle
CEI
Chiang Rai
$975 Roundtrip, found 5 days ago
$975
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Mon, Sep 22 from Seattle to Chiang Rai, returning Mon, Oct 6, priced at $975 found 5 days ago
EVA Airways
Mon, Sep 22 - Mon, Oct 6
SEA
Seattle
CEI
Chiang Rai
$975 Roundtrip, found 5 days ago
$975
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Mon, Sep 22 from Seattle to Chiang Rai, returning Mon, Oct 6, priced at $975 found 5 days ago
EVA Airways
Mon, Sep 22 - Mon, Oct 6
SEA
Seattle
CEI
Chiang Rai
$979 Roundtrip, found 5 days ago
$979
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Mon, Sep 22 from Seattle to Chiang Rai, returning Mon, Oct 6, priced at $979 found 5 days ago
EVA Airways
Mon, Sep 22 - Mon, Oct 6
SEA
Seattle
CEI
Chiang Rai
$983 Roundtrip, found 5 days ago
$983
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Mon, Sep 22 from Seattle to Chiang Rai, returning Mon, Oct 6, priced at $983 found 5 days ago
EVA Airways
Thu, Oct 23 - Tue, Nov 4
SEA
Seattle
CEI
Chiang Rai
$1,004 Roundtrip, found 6 days ago
$1,004
Roundtrip
found 6 days ago
Select EVA Airways flight, departing Thu, Oct 23 from Seattle to Chiang Rai, returning Tue, Nov 4, priced at $1,004 found 6 days ago
EVA Airways
Thu, Oct 23 - Tue, Nov 4
SEA
Seattle
CEI
Chiang Rai
$1,008 Roundtrip, found 6 days ago
$1,008
Roundtrip
found 6 days ago
Select EVA Airways flight, departing Thu, Oct 23 from Seattle to Chiang Rai, returning Tue, Nov 4, priced at $1,008 found 6 days ago
EVA Airways
Sun, Sep 21 - Sun, Oct 5
SEA
Seattle
CEI
Chiang Rai
$1,015 Roundtrip, found 5 days ago
$1,015
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Sun, Sep 21 from Seattle to Chiang Rai, returning Sun, Oct 5, priced at $1,015 found 5 days ago
EVA Airways
Sun, Sep 21 - Sun, Oct 5
SEA
Seattle
CEI
Chiang Rai
$1,019 Roundtrip, found 5 days ago
$1,019
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Sun, Sep 21 from Seattle to Chiang Rai, returning Sun, Oct 5, priced at $1,019 found 5 days ago
EVA Airways
Sun, Sep 21 - Sun, Oct 5
SEA
Seattle
CEI
Chiang Rai
$1,023 Roundtrip, found 5 days ago
$1,023
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Sun, Sep 21 from Seattle to Chiang Rai, returning Sun, Oct 5, priced at $1,023 found 5 days ago
Qatar Airways
Fri, Dec 19 - Sun, Jan 11
SEA
Seattle
CEI
Chiang Rai
$2,884 Roundtrip, found 18 hours ago
$2,884
Roundtrip
found 18 hours ago
Select Qatar Airways flight, departing Fri, Dec 19 from Seattle to Chiang Rai, returning Sun, Jan 11, priced at $2,884 found 18 hours ago
Flights from Seattle (SEA) to Chiang Rai (CEI)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Chiang Rai Intl.
Roundtrip price
$974
Distance
7094 mi

Seattle to Chiang Rai Flights

The cheapest times to fly from Seattle to Chiang Rai

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Chiang Rai are during the month of September. You can find some of the cheapest flights from Seattle to Chiang Rai with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Chiang Rai

Sunday is one of the best days to book for cheap flights from Seattle to Chiang Rai: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Chiang Rai

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Chiang Rai in 2025. You can also book with separate airlines for your outbound and return journeys, from $550 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Chiang Rai flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Chiang Rai airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Chiang Rai Intl. Airport (CEI) cost?
Get a cheap one-way flight from $550 or cheap return flight from $975 from Seattle - Tacoma Intl. Airport (SEA) to Chiang Rai Intl. Airport (CEI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Chiang Rai Intl. Airport (CEI)?
Planning your trip for September can help you save, as it's the cheapest month for flights between SEA and CEI. You'll usually find the lowest fares during off-peak months.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Chiang Rai Intl. Airport (CEI)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll fly you from SEA to CEI. Then, sort your results by "Price (lowest to highest)" to score a good deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Chiang Rai Intl. Airport (CEI)?
Nonstop flights from Seattle - Tacoma Intl. Airport (SEA) to Chiang Rai Intl. Airport (CEI) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SEA to CEI?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary depending on a range of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Chiang Rai Intl. Airport (CEI)?
Opt for a flight from Seattle - Tacoma Intl. Airport (SEA) to Chiang Rai Intl. Airport (CEI) that leaves before 3 PM to reduce the likelihood of delays. Departures after this hour have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Chiang Rai Intl. Airport (CEI) last-minute?
Booking your ticket from SEA to CEI right before your journey is generally more expensive. But if you're flexible with your schedule, you could grab a cheap last-minute fare.
Is it cheaper to book a SEA to CEI flight and hotel package?
Securing a SEA to CEI flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Pick from our extensive range of accommodations and then add car rentals, flights and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Chiang Rai Intl. Airport (CEI)?
If you booked your SEA to CEI flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more details.

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*Available to One Key members.