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Dulles Intl

$31+ Cheap flights from Knoxville (TYS) to Dulles Intl (IAD)

TYS — IAD
Oct 20 — Oct 271
Tue 10/20
Tue 10/27
1 adult, Economy
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Cheap flight deals from Knoxville to Dulles Intl

Cheapest flights from Knoxville to Dulles Intl

Thu 10/222:01 pm -
2 stops10h 20m
Sun 10/258:16 am -
Nonstop1h 28m
Deal found 9/17$180
Fri 10/163:54 pm -
2 stops32h 27m
Sun 10/183:53 pm -
Nonstop1h 28m
Deal found 9/19$184
Sun 10/256:00 am -
Nonstop1h 26m
Fri 10/306:07 pm -
1 stop15h 58m
Deal found 9/19$186
Thu 10/11:37 pm -
Nonstop1h 26m
Tue 10/611:12 am -
1 stop27h 30m
Deal found 9/15$187
Thu 10/227:45 am -
Nonstop1h 26m
Wed 10/286:07 pm -
1 stop28h 17m
Deal found 9/15$189
Wed 10/212:43 pm -
2 stops26h 30m
Sun 10/258:16 am -
Nonstop1h 28m
Deal found 9/17$190
Fri 10/235:45 am -
Nonstop1h 40m
Mon 10/2612:55 pm -
Nonstop1h 53m
Deal found 9/15$192
Wed 9/3010:55 am -
1 stop23h 32m
Sun 10/258:16 am -
Nonstop1h 28m
Deal found 9/17$193
Thu 10/297:45 am -
Nonstop1h 26m
Tue 11/39:06 pm -
2 stops16h 52m
Deal found 9/19$194
Tue 10/276:04 pm -
2 stops23h 08m
Thu 11/510:03 am -
Nonstop1h 35m
Deal found 9/19$197
Sat 10/1710:33 am -
2 stops13h 48m
Sun 10/183:53 pm -
Nonstop1h 28m
Deal found 9/15$200

Find flight deals from Knoxville to Dulles Intl

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$180
(Kiwi.com)

One-way from

$31
(CheapOair)

Popular in

May

Cheapest in

March

Average price

$355

Good round-trip deal

$364 or less

Good one-way deal

$292 or less
Provider with most accurate pricing for Knoxville McGhee Tyson-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Washington, D.C. Dulles Intl flights.
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From Knoxville McGhee Tyson to Washington, D.C. Dulles Intl
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One-way flight from Knoxville McGhee Tyson to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 8% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Knoxville McGhee Tyson to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Knoxville McGhee Tyson to Washington, D.C. Dulles Intl.
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Knoxville to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - IAD Washington, D.C. Dulles Intl

TYSIAD

Knoxville McGhee Tyson

Wed 10/14

4:14 pm-8:11 pm

1 stop27h 57m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$118

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - IAD Washington, D.C. Dulles Intl

TYSIAD

Knoxville McGhee Tyson

Thu 10/22

9:05 am-8:11 pm

1 stop11h 06m

Washington, D.C. Dulles Intl

Sun 10/25

8:16 am-9:44 am

Nonstop1h 28m

$182
Quickest round-trip

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - IAD Washington, D.C. Dulles Intl

TYSIAD

Knoxville McGhee Tyson

Fri 10/30

5:45 am-7:28 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$214

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - IAD Washington, D.C. Dulles Intl

TYSIAD

Knoxville McGhee Tyson

Fri 11/27

5:45 am-7:28 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$214

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - IAD Washington, D.C. Dulles Intl

TYSIAD

Knoxville McGhee Tyson

Mon 11/9

7:22 pm-12:41 am

1 stop5h 19m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$224

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - IAD Washington, D.C. Dulles Intl

TYSIAD

Knoxville McGhee Tyson

Fri 11/27

5:40 am-9:55 am

1 stop4h 15m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$244

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - IAD Washington, D.C. Dulles Intl

TYSIAD

Knoxville McGhee Tyson

Sat 10/3

7:25 pm-9:09 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$244

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - IAD Washington, D.C. Dulles Intl

TYSIAD

Knoxville McGhee Tyson

Wed 10/14

1:35 pm-3:21 pm

Nonstop1h 46m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$249

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - IAD Washington, D.C. Dulles Intl

TYSIAD

Knoxville McGhee Tyson

Mon 11/30

5:45 am-7:28 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$249

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - IAD Washington, D.C. Dulles Intl

TYSIAD

Knoxville McGhee Tyson

Fri 10/2

10:42 am-4:01 pm

1 stop5h 19m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$254

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 21 resultsSorted by cheapest first
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Compare providers for flights from Knoxville to Dulles Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Dulles Intl in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Knoxville-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Knoxville-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Knoxville to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Knoxville with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Knoxville to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from Knoxville to Washington, D.C. Dulles Intl Airport?

Currently, March is the cheapest month in which you can book a flight from Knoxville to Washington, D.C. Dulles Intl Airport (average of $130). Flying from Knoxville to Washington, D.C. Dulles Intl Airport in May is currently the most expensive (average of $419). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from TYS to IAD?

A simple way to save on the total cost of your ticket is to fly from Knoxville to Washington, D.C. Dulles Intl Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 90% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from Knoxville to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Knoxville to Washington, D.C. Dulles Intl Airport flight should consider departing on Saturday afternoons when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Knoxville to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

Knoxville to Washington, D.C. Dulles Intl Airport flights typically cost between $235 and $454 in October.
The cheapest round-trip price found within the last 5 days was $180 on Multiple Airlines (Oct 22-Oct 25).

Reviews of airlines servicing Dulles Intl

Get a feel of what it's like to fly with United Airlines and Allegiant Air from Knoxville to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,232 reviews

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
10,232 reviews
United Airlines
7.4
Good
10,232 reviews

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Allegiant Air
7.3
Good
678 reviews
United Airlines
7.4
Good
10,232 reviews

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

  • What airport do you fly from for flights from Knoxville to Washington, D.C. Dulles Intl?

    If you book a flight to Washington, D.C. Dulles Intl from Knoxville, you will be flying from McGhee Tyson, which is the city’s only airport. Knoxville McGhee Tyson (TYS) is located 11.3 mi from the center of Knoxville. There are 15 flights from McGhee Tyson to Washington, D.C. Dulles Intl per day from 2 different airlines.

  • How long is the flight from Knoxville to Washington, D.C. Dulles Intl Airport?

    United Airlines can get you from Knoxville to Washington, D.C. Dulles Intl Airport in just under 1h 46m. Your travel time will be generally consistent. Airlines will cover a distance of 419 mi. All flights are typically nonstop.

  • What are the cheapest airlines flying from Knoxville to Washington, D.C. Dulles Intl Airport round-trip?

    Cheapflights users have booked flights from Knoxville to Washington, D.C. Dulles Intl Airport round-trip from $46. Another airline that can offer you cheap pricing is United Airlines. These flights start at 82% lower than the current average price 3 months from now.

  • What are the most reliable airlines from Knoxville to Washington, D.C. Dulles Intl Airport?

    The top 3 most reliable airlines when flying from Knoxville to Washington, D.C. Dulles Intl Airport are Ethiopian Air (98%), CommutAir (94%) and Copa Airlines (92%).

  • What are the cheapest flights from Knoxville to Washington, D.C. Dulles Intl Airport?

    Looking at all options, your cheapest flight can be booked for $101. While the most popular route (Knoxville McGhee Tyson - Washington, D.C. Dulles Intl) can be booked for $57 on average, our data indicates $568 when flying from Knoxville to Washington, D.C. Dulles Intl Airport.

  • Can I find deals for flights from Knoxville to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Knoxville to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Knoxville to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Knoxville to Dulles Intl.

  • Can I find deals for business class flights from Knoxville to Dulles Intl?

    Yes. Cheapflights offers flight deals from Knoxville to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Knoxville to Washington, D.C. Dulles Intl Airport?

    Currently, March is the cheapest month in which you can book a flight from Knoxville to Washington, D.C. Dulles Intl Airport (average of $130). Flying from Knoxville to Washington, D.C. Dulles Intl Airport in May is currently the most expensive (average of $419). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Arlington
Owings Mills
Lanham
Tysons
Chantilly
Woodbridge
Reston
Herndon
Hyattsville
Rockville
Fredericksburg
Falls Church
Sterling
Hanover
Laurel
Springfield
Oxon Hill
Clinton
Hunt Valley

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Knoxville to Dulles Intl

AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$46Average$90FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$194Average$326FlexibilityNo cancel feeOn-time69%

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