$721 Cheap Flights from Udon Thani (UTH) to Seattle (SEA)

View $721 flight on Fri, Oct 17, 2025Opens in a new window

Popular airlines from Udon Thani (UTH-Udon Thani Intl.) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Udon Thani to Seattle (UTH-SEA)

Prices were available within the past 7 days and start at $721 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Udon Thani Intl. Airport (UTH) to Seattle - Tacoma Intl. Airport (SEA) cost?
Snag a cheap one-way flight from $721 or cheap return flight from Udon Thani Intl. Airport (UTH) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Udon Thani Intl. Airport (UTH) to Seattle - Tacoma Intl. Airport (SEA)?
The cheapest month to fly from UTH to SEA is , when there's less demand. Off-peak season is often when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Udon Thani Intl. Airport (UTH) to Seattle - Tacoma Intl. Airport (SEA)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll fly you from UTH to SEA. Then, sort your results by "Price (lowest to highest)" to pick up a great deal.
How many flights per day from Udon Thani Intl. Airport (UTH) to Seattle - Tacoma Intl. Airport (SEA)?
Direct flights from Udon Thani Intl. Airport (UTH) to Seattle - Tacoma Intl. Airport (SEA) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from UTH to SEA?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Udon Thani Intl. Airport (UTH) to Seattle - Tacoma Intl. Airport (SEA)?
To arrive at Seattle - Tacoma Intl. Airport (SEA) without delays, book a flight that leaves Udon Thani Intl. Airport (UTH) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Udon Thani Intl. Airport (UTH) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Booking your plane ticket from UTH to SEA shortly before your trip is usually more expensive. But if you're flexible with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book an UTH to SEA flight and hotel package?
Opting for an UTH to SEA flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Pick from our wide 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 Udon Thani Intl. Airport (UTH) to Seattle - Tacoma Intl. Airport (SEA)?
Typically, you can cancel or reschedule your UTH to SEA flight. However, there may be additional fees, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you need further details, go to our Customer Service portal.

Travel information

Origin airport
Udon Thani Intl.
Destination airport
Seattle - Tacoma Intl.
Distance
7159 mi

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Udon Thani to Seattle Flights

The cheapest times to fly from Udon Thani to Seattle

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 Udon Thani to Seattle are during the month of . You can find some of the cheapest flights from Udon Thani to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Udon Thani to Seattle

Sunday is one of the best days to book for cheap flights from Udon Thani to Seattle: 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 Udon Thani to Seattle

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 Udon Thani to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $721 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 Udon Thani to Seattle 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 Udon Thani to Seattle 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.

 

Udon Thani to Seattle Flights

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