$95 Cheap Flights from Knoxville (TYS) to Washington (IAD)

View $95 flight on Fri, Jul 4, 2025Opens in a new window

Popular airlines from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD)

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Find available prices by choosing your travel dates.

Cheap Flights from Knoxville to Washington (TYS-IAD)

Prices were available within the past 7 days and start at $95 for one-way flights and $189 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Aug 29 - Mon, Sep 1
TYS
Knoxville
IAD
Washington
$189 Roundtrip, found 3 hours ago
$189
Roundtrip
found 3 hours ago
Select United flight, departing Fri, Aug 29 from Knoxville to Washington, returning Mon, Sep 1, priced at $189 found 3 hours ago
United
Fri, Aug 29 - Mon, Sep 1
TYS
Knoxville
IAD
Washington
$194 Roundtrip, found 3 hours ago
$194
Roundtrip
found 3 hours ago
Select United flight, departing Fri, Aug 29 from Knoxville to Washington, returning Mon, Sep 1, priced at $194 found 3 hours ago
United
Fri, Jul 25 - Mon, Jul 28
TYS
Knoxville
IAD
Washington
$199 Roundtrip, found 4 hours ago
$199
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Jul 25 from Knoxville to Washington, returning Mon, Jul 28, priced at $199 found 4 hours ago
United
Wed, May 28 - Thu, May 29
TYS
Knoxville
IAD
Washington
$202 Roundtrip, found 5 days ago
$202
Roundtrip
found 5 days ago
Select United flight, departing Wed, May 28 from Knoxville to Washington, returning Thu, May 29, priced at $202 found 5 days ago
United
Fri, Jul 25 - Mon, Jul 28
TYS
Knoxville
IAD
Washington
$204 Roundtrip, found 4 hours ago
$204
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Jul 25 from Knoxville to Washington, returning Mon, Jul 28, priced at $204 found 4 hours ago
United
Tue, Jun 24 - Sun, Jun 29
TYS
Knoxville
IAD
Washington
$208 Roundtrip, found 21 hours ago
$208
Roundtrip
found 21 hours ago
Select United flight, departing Tue, Jun 24 from Knoxville to Washington, returning Sun, Jun 29, priced at $208 found 21 hours ago
Delta
Tue, Jul 15 - Tue, Jul 22
TYS
Knoxville
IAD
Washington
$209 Roundtrip, found 2 hours ago
$209
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Jul 15 from Knoxville to Washington, returning Tue, Jul 22, priced at $209 found 2 hours ago
United
Fri, May 9 - Sun, May 11
TYS
Knoxville
IAD
Washington
$209 Roundtrip, found 2 hours ago
$209
Roundtrip
found 2 hours ago
Select United flight, departing Fri, May 9 from Knoxville to Washington, returning Sun, May 11, priced at $209 found 2 hours ago
United
Sat, May 10 - Mon, May 12
TYS
Knoxville
IAD
Washington
$213 Roundtrip, found 3 days ago
$213
Roundtrip
found 3 days ago
Select United flight, departing Sat, May 10 from Knoxville to Washington, returning Mon, May 12, priced at $213 found 3 days ago
American Airlines
Wed, Jun 4 - Sat, Jul 5
TYS
Knoxville
IAD
Washington
$233 Roundtrip, found 4 hours ago
$233
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Wed, Jun 4 from Knoxville to Washington, returning Sat, Jul 5, priced at $233 found 4 hours ago
Flights from Knoxville (TYS) to Washington (IAD)
Origin airport
McGhee Tyson
Destination airport
Washington Dulles Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$189
Distance
419 mi

Knoxville to Washington Flights

The cheapest times to fly from Knoxville to Washington

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

The best time to book a flight from Knoxville to Washington

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

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 Knoxville to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $95 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 Knoxville to Washington 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 Knoxville to Washington 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 McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD) cost?
Snag cheap return tickets starting from $189 from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a United flight leaving TYS on May 14 2025 and touching down at IAD. The price was last updated on April 23 2025 and has not changed since.
What is the cheapest month to fly from TYS to IAD?
The cheapest flights from TYS to IAD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD)?
When flying out of McGhee Tyson Airport (TYS), you can catch a nonstop flight to Washington Dulles Intl. Airport (IAD) with United Airlines.
What is the cheapest airline that flies from TYS to IAD?
At the moment, the cheapest airline offering one-way flights from TYS to IAD is United. You can jet off on this route from $95. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from TYS on May 28 2025. Prices were last updated on April 23 2025 and have not changed since.
How many flights per day from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD)?
With an average of 3 direct flights that operate from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD) each day, you’ll be jetting off in no time.
What are the most popular departure times for flights from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD)?
The 9 AM departures from TYS to IAD see the highest demand. Prices can be higher for these popular slots. If you’re hoping to save money, pick a less crowded time to fly.
What day of the week has the most flights from TYS to IAD?
Friday offers the most flights from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD). Consider taking off on this day and you’ll have a greater chance of finding a schedule that works for you.
What is the earliest flight from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD)?
Catch the earliest flight at around 5:45AM UTC-5, departing from McGhee Tyson Airport (TYS). You’ll be in the air for around 1h 46m, coming in to land at Washington Dulles Intl. Airport (IAD) at approximately 7:31AM UTC-5.
How long does it take to fly from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD)?
It usually takes 1 hour and 45 minutes to fly the 420 mi from TYS to IAD.
What airline has the least delays from TYS to IAD?
Consider booking with United Airlines if you’d like to go straight from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD) without any interruptions. This airline has the strongest track record for punctuality, with an on-time score of 86%. Want to get notified of any changes? You can keep an eye on your flight status using the Expedia App.
What is the best time to fly from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD)?
To avoid potential delays on the McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD) route, fly before 3 PM. Later departures have a 22% higher chance of being 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.
What airports do you fly into for Washington from McGhee Tyson Airport (TYS)?
If you’re leaving on a direct flight from McGhee Tyson Airport (TYS) to Washington, you can arrive at either Ronald Reagan Washington National Airport (DCA) or Washington Dulles Intl. Airport (IAD).
Is it cheaper to buy a plane ticket from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD) last-minute?
Waiting until right before your break to book a ticket from TYS to IAD often results in higher prices. While you may find some last-minute discounts, they aren’t always guaranteed. Keep your travel plans flexible to maximize your chances of scoring a bargain.
Is it cheaper to book a TYS to IAD flight and hotel package?
Compared with arranging hotels and flights separately, booking a TYS to IAD flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one place takes the hassle out of travel planning. Just secure your flights and choose from our extensive range of hotels, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from McGhee Tyson Airport (TYS) to Washington Dulles Intl. Airport (IAD)?
If you reserved your TYS to IAD flight within the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

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