Cheap Flights from Washington (IAD) to Tainan (TNN)

Popular airlines from Washington Dulles Intl. Airport (IAD) 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 $1,477
KHH
Kaohsiung Intl.
Cheapest
Average driving time to city center1 h 6 min
Flights from $1,477

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Tainan Airport (TNN) cost?
Grab a cheap one-way flight or cheap return flight from Washington Dulles Intl. Airport (IAD) 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 Washington Dulles Intl. Airport (IAD) to Tainan Airport (TNN)?
is the cheapest month to fly from IAD to TNN. Traveling outside of peak seasons is often the key to scoring lower fares.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Tainan Airport (TNN)?
To find the cheapest airline that'll fly you from IAD to TNN, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Tainan Airport (TNN)?
There aren't any daily nonstop flights departing from Washington Dulles Intl. Airport (IAD) to Tainan Airport (TNN). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be on your way in no time at all.
What day of the week has the most flights from IAD to TNN?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* But this can change depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Tainan Airport (TNN)?
Choose a flight from Washington Dulles Intl. Airport (IAD) to Tainan Airport (TNN) that takes off before 3 PM to reduce the risk of cancellations. Departures later than this are on average 22% more likely to be canceled.**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 Washington Dulles Intl. Airport (IAD) to Tainan Airport (TNN) last-minute?
Waiting until just before your trip to book a flight from IAD to TNN generally means paying more. While you may come across some last-minute offers, there's no guarantee. Keep your travel schedule open to boost your chances of landing a bargain.
Is it cheaper to book an IAD to TNN flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAD to TNN flight and hotel package with Expedia could lead to significant savings. Better yet, managing everything in one place takes the hassle out of travel planning. Simply pick your flights and select from our extensive range of stays, then tailor your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Tainan Airport (TNN)?
If you booked your IAD to TNN flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of fare 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, visit our Customer Service portal for more details.

Travel information

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Tainan
Distance
8009 mi

Book with confidence

Book with confidence

Washington to Tainan Flights

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

 

The best time to book a flight from Washington to Tainan

Sunday is one of the best days to book for cheap flights from Washington 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 Washington 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 Washington 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 Washington 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 Washington 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.

 

Washington to Tainan Flights

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