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Knoxville

$41+ Cheap flights from Dulles Intl (IAD) to Knoxville (TYS)

IAD — TYS
Oct 23 — Oct 301
Fri 10/23
Fri 10/30
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson are usually found in June or March, booked 59 days in advance, depart on a Thursday or Sunday and return on a Friday

Cheap flight deals from Dulles Intl to Knoxville

Cheapest flights from Dulles Intl to Knoxville

Thu 10/2210:01 am -
Nonstop1h 28m
Sun 10/256:00 am -
Nonstop1h 26m
Deal found 9/20$78
Sun 10/183:53 pm -
Nonstop1h 28m
Thu 10/227:45 am -
Nonstop1h 26m
Deal found 9/20$80
Sun 10/183:53 pm -
Nonstop1h 28m
Sun 10/256:00 am -
Nonstop1h 26m
Deal found 9/20$82
Thu 11/1210:03 am -
Nonstop1h 35m
Sun 11/157:30 am -
Nonstop1h 28m
Deal found 9/22$89
Thu 11/510:03 am -
Nonstop1h 35m
Sun 11/87:30 am -
Nonstop1h 28m
Deal found 9/22$104
Thu 11/196:01 pm -
Nonstop1h 32m
Sun 11/226:13 pm -
Nonstop1h 29m
Deal found 9/19$116
Sun 10/183:53 pm -
Nonstop1h 28m
Wed 10/212:43 pm -
1 stop19h 34m
Deal found 9/18$132
Sun 11/228:32 pm -
Nonstop1h 32m
Tue 11/246:15 pm -
Nonstop1h 29m
Deal found 9/21$133
Thu 10/2210:01 am -
Nonstop1h 28m
Fri 10/239:41 pm -
2 stops26h 40m
Deal found 9/18$136
Thu 11/1210:03 am -
Nonstop1h 35m
Mon 11/162:21 pm -
2 stops26h 51m
Deal found 9/21$140

Find flight deals from Dulles Intl to Knoxville

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$78
(Trip.com)

One-way from

$41
(Kissandfly.com)

Popular in

January

Cheapest in

June

Average price

$387

Good round-trip deal

$190 or less

Good one-way deal

$54 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Knoxville McGhee Tyson flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Knoxville McGhee Tyson flights.
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From Washington, D.C. Dulles Intl to Knoxville McGhee Tyson
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One-way flight from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson
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Highest demand for flights based on searches. 26% potential increase in price ($97 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($20 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 Washington, D.C. Dulles Intl to Knoxville McGhee Tyson.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson.
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Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

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Price

Cheapest round-trip

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Wed 11/18

10:12 pm-11:59 pm

Nonstop1h 47m

Knoxville McGhee Tyson

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$194

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Wed 10/28

10:12 pm-11:59 pm

Nonstop1h 47m

Knoxville McGhee Tyson

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$214

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Mon 11/23

5:45 pm-7:36 pm

Nonstop1h 51m

Knoxville McGhee Tyson

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$214

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Tue 11/10

10:12 pm-11:59 pm

Nonstop1h 47m

Knoxville McGhee Tyson

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$214

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Tue 11/24

6:00 am-11:28 am

1 stop5h 28m

Knoxville McGhee Tyson

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$224

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Sat 12/5

11:11 am-5:30 pm

1 stop6h 19m

Knoxville McGhee Tyson

Mon 12/7

7:26 pm-12:41 am

1 stop5h 15m

$227

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Thu 12/3

12:34 pm-6:33 pm

1 stop5h 59m

Knoxville McGhee Tyson

Mon 12/7

6:17 pm-12:42 am

1 stop6h 25m

$227

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Thu 10/1

7:50 am-8:15 am

2 stops24h 25m

Knoxville McGhee Tyson

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$231

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Sun 12/20

9:15 am-11:04 am

Nonstop1h 49m

Knoxville McGhee Tyson

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$239

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Sat 10/24

6:37 pm-8:19 pm

Nonstop1h 42m

Knoxville McGhee Tyson

Mon 10/26

7:35 pm-9:15 pm

Nonstop1h 40m

$240

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/20

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Dulles Intl to Knoxville

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Knoxville 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 Washington, D.C. Dulles Intl Airport-Knoxville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Knoxville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Knoxville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Knoxville 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 Washington, D.C. Dulles Intl Airport-Knoxville 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 Dulles Intl to Knoxville

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

Cheapflights Insights

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

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Knoxville?

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Knoxville may vary depending on when you book. For the best chance of a lower fare, look to book 58 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Knoxville (average of $120). Flying from Washington, D.C. Dulles Intl Airport to Knoxville in January is currently the most expensive (average of $487). 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 IAD to TYS?

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Knoxville in the afternoon. Doing so could potentially save you 58% on the flight price compared to flying in the morning, which is usually more expensive.

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

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Knoxville flight should consider departing on Monday afternoons when fares are most often at their lowest. Monday mornings 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 Washington, D.C. Dulles Intl Airport to Knoxville?

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to Knoxville flights typically cost between $206 and $386 in October.
The cheapest round-trip price found within the last 5 days was $78 on Allegiant Air (Oct 22-Oct 25).

Reviews of airlines servicing Knoxville

Read reviews from past customers who have flown United Airlines and Allegiant Air from Washington, D.C. Dulles Intl Airport to Knoxville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,229 reviews

Comfort

7.3

Food

6.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
10,229 reviews
United Airlines
7.4
Good
10,229 reviews

Comfort

7.3

Food

6.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Allegiant Air
7.3
Good
678 reviews
United Airlines
7.4
Good
10,229 reviews

Comfort

7.3

Food

6.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Related info for your journey

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

    Located just 11.3 mi from the city center, Knoxville McGhee Tyson is the airport most travelers will use when flying to Knoxville from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to McGhee Tyson (TYS) should be relatively easy as there are 7 daily inbound flights from Washington, D.C. Dulles Intl from 2 different airlines.

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

    A quick flight from Washington, D.C. Dulles Intl Airport to Knoxville can take about 1h 42m. Delta provides one of the quickest options available for as low as $240. The distance from Washington, D.C. Dulles Intl Airport to Knoxville is about 419 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    According to our current data, Allegiant Air ($48), and United Airlines ($217) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Knoxville. Users have found that Allegiant Air is 82% cheaper than the other options available to this destination.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Dulles Intl Airport to Knoxville consider choosing GoJet (100%), Mesa Airlines (88%) or Allegiant Air (83%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay $274 for a flight from Washington, D.C. Dulles Intl Airport to Knoxville. The cheapest flight overall is $46 while the most popular route, (Washington, D.C. Dulles Intl - Knoxville McGhee Tyson) is currently priced at $57.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Knoxville 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 Washington, D.C. Dulles Intl Airport to Knoxville?

    Currently, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Knoxville (average of $120). Flying from Washington, D.C. Dulles Intl Airport to Knoxville in January is currently the most expensive (average of $487). 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 Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Cherokee
Crossville
Morristown
Bryson City
Murphy

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Dulles Intl to Knoxville

AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$48Average$92FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$217Average$346FlexibilityNo cancel feeOn-time69%

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