Cheap Flights from Seattle (SEA) to Tainan (TNN)

Popular airlines from Seattle-Tacoma International Airport (SEA) to Tainan (TNN)

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Alternative airports near Tainan

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Kaohsiung Intl. KHH. Cheapest option available. Average driving time to city center is 1 hour 6 minutes. Flights from $672
KHH
Kaohsiung Intl.
Cheapest
Average driving time to city center1 h 6 min
Flights from $672

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Tainan Airport (TNN) cost?
Get a cheap one-way flight or cheap return flight from Seattle - Tacoma Intl. Airport (SEA) to Tainan Airport (TNN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Tainan Airport (TNN)?
Planning your getaway for is a good way to save, as it's the cheapest month for flights between SEA and TNN. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Tainan Airport (TNN)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll fly you from SEA to TNN. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Tainan Airport (TNN)?
There aren't any daily nonstop flights available from Seattle - Tacoma Intl. Airport (SEA) to Tainan Airport (TNN). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from SEA to TNN?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change 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 Seattle - Tacoma Intl. Airport (SEA) to Tainan Airport (TNN)?
To land at Tainan Airport (TNN) on time, book a flight that takes off from Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The likelihood 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 Seattle - Tacoma Intl. Airport (SEA) to Tainan Airport (TNN) last-minute?
Booking your flight from SEA to TNN shortly before your trip is generally more expensive. But if you're flexible with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a SEA to TNN flight and hotel package?
Compared with arranging hotels and flights separately, booking a SEA to TNN flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one convenient place will take the stress out of planning your trip. Simply pick your flights and select from our extensive range of hotels, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Tainan Airport (TNN)?
Typically, you're able to cancel or reschedule your SEA to TNN flight. However, there may be additional fees, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you'd like more details, visit our Customer Service portal.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Tainan
Distance
6218 mi

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Seattle to Tainan Flights

The cheapest times to fly from Seattle to Tainan

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

 

The best time to book a flight from Seattle to Tainan

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

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 Tainan in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Tainan 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 Tainan 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.

 

Seattle to Tainan Flights

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*Available to One Key members.