$129 Cheap United flights Washington (IAD) to Knoxville (TYS)

View $129 flight on Fri, Jan 16, 2026Opens in a new window
  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

$129 Cheap United flights Washington (IAD) to Knoxville (TYS)

Prices were available within the past 7 days and start at $129 for one-way flights and $189 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Dec 27 - Wed, Dec 31
IAD
Washington
TYS
Knoxville
$189 Roundtrip, found 1 hour ago
$189
Roundtrip
found 1 hour ago
Select United flight, departing Sat, Dec 27 from Washington to Knoxville, returning Wed, Dec 31, priced at $189 found 1 hour ago
United
Tue, Apr 14 - Sat, Apr 18
IAD
Washington
TYS
Knoxville
$200 Roundtrip, found 1 day ago
$200
Roundtrip
found 1 day ago
Select United flight, departing Tue, Apr 14 from Washington to Knoxville, returning Sat, Apr 18, priced at $200 found 1 day ago
United
Thu, Jan 8 - Sun, Jan 11
IAD
Washington
TYS
Knoxville
$202 Roundtrip, found 5 days ago
$202
Roundtrip
found 5 days ago
Select United flight, departing Thu, Jan 8 from Washington to Knoxville, returning Sun, Jan 11, priced at $202 found 5 days ago
United
Sat, Dec 20 - Tue, Dec 23
IAD
Washington
TYS
Knoxville
$204 Roundtrip, just found
$204
Roundtrip
just found
Select United flight, departing Sat, Dec 20 from Washington to Knoxville, returning Tue, Dec 23, priced at $204 just found
United
Sat, Dec 27 - Sat, Jan 3
IAD
Washington
TYS
Knoxville
$214 Roundtrip, found 5 hours ago
$214
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Dec 27 from Washington to Knoxville, returning Sat, Jan 3, priced at $214 found 5 hours ago
United
Sat, Dec 20 - Tue, Dec 23
IAD
Washington
TYS
Knoxville
$215 Roundtrip, just found
$215
Roundtrip
just found
Select United flight, departing Sat, Dec 20 from Washington to Knoxville, returning Tue, Dec 23, priced at $215 just found
Flights from Washington (IAD) to Knoxville (TYS)
Origin airport
Washington Dulles Intl.
Destination airport
McGhee Tyson
Airlines serving
American Airlines, Delta, United
Popular airline
Delta
Distance
419 mi
Average flight time
1 hour 44 mins

Black Friday Sale

Limited-time deals: Save up to 50% on select hotels.
Book now

Frequently asked questions

How much is a United Airlines flight from Washington Dulles Intl. Airport (IAD) to McGhee Tyson Airport (TYS)?
You can find affordable round-trip United Airlines flights from $189 from IAD to TYS by filtering your results from "Price (lowest to highest)" on Expedia. Or search for deals from $129 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to TYS with United Airlines?
January is one of the least expensive months to jet off to Knoxville with United Airlines. You could also find great deals on return and one-way tickets in December.
What is the cheapest time to book flights from Washington Dulles Intl. Airport (IAD) to McGhee Tyson Airport (TYS) with United Airlines?
Begin your search one to three months ahead of your travel date to find cheaper fares on United Airlines flights from Washington Dulles Intl. Airport (IAD) to McGhee Tyson Airport (TYS). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic flights.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Washington Dulles Intl. Airport (IAD) to McGhee Tyson Airport (TYS)?
Book a seat on one of United Airlines's 21 weekly direct flights from Washington Dulles Intl. Airport (IAD) to McGhee Tyson Airport (TYS). To see your options, enter your origin, destination and dates and hit search. Then use the "Nonstop" and "Airline" filters.
How long does it take to fly from IAD to TYS with United Airlines?
From takeoff to arrival, a nonstop United Airlines flight from Washington Dulles Intl. Airport (IAD) to McGhee Tyson Airport (TYS) takes approximately 1h 51m.
Which day of the week has the most United Airlines flights from Washington Dulles Intl. Airport (IAD) to McGhee Tyson Airport (TYS)?
Thursday has the most United Airlines flights from Washington Dulles Intl. Airport (IAD) to McGhee Tyson Airport (TYS). With 3 daily departures, this is the best day to find something that will suit your plans.
What is the earliest United Airlines flight from IAD to TYS?
The earliest flight from IAD to TYS with United Airlines departs at 8:50AM UTC-5. You'll touch down at 10:44AM UTC-5. The final United Airlines flight of the day leaves at 5:44PM UTC-5 and arrives at 7:36PM UTC-5. With approximately 20% fewer cancellations for early and mid-morning departures, beginning your travel day early is often the best way to go.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Knoxville?
McGhee Tyson Airport (TYS) is the primary Knoxville hub for United Airlines flights from Washington Dulles Intl. Airport (IAD).
Why fly with United Airlines from IAD to TYS?
With a rewarding loyalty program, United Airlines is a popular choice for many passengers flying from IAD to TYS. Plus, as a United Mileage Plus and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Washington Dulles Intl. Airport (IAD) to McGhee Tyson Airport (TYS)?
Catch a United Airlines flight from Washington Dulles Intl. Airport (IAD) to McGhee Tyson Airport (TYS), and you'll probably board an Embraer ERJ. Bear in mind though, that the aircraft type can vary depending on operational reasons.
Can I change or cancel my United Airlines flight from Washington Dulles Intl. Airport (IAD) to McGhee Tyson Airport (TYS)?
Changes are typically free within 24 hours of making a booking, but your airline may charge you after that time. For more details about altering your reservation, go to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to adjust your plans without being charged, apply the "No cancel fee" or "Changes included" filter when planning your next adventure.

Explore a world of travel with Expedia

*Available to One Key members.