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$39+ Cheap flights from Dulles Intl (IAD) to Knoxville (TYS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — TYS
Jan 23 — Jan 301
Fri 1/23
Fri 1/30
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 July or May, booked 78 days in advance, depart on a Friday or Wednesday and return on a Friday

Cheap flight deals from Dulles Intl to Knoxville

Cheapest flights from Dulles Intl to Knoxville
Explore the most affordable flight options available from Dulles Intl to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 24, 2025.

This United Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:55 pmIAD - TYS
Nonstop1h 56mUnited Airlines
Mon 1/59:50 amTYS - IAD
Nonstop1h 44mUnited Airlines
Deal found 12/22$238
This United Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:55 pmIAD - TYS
Nonstop1h 56mUnited Airlines
Mon 12/295:45 amTYS - IAD
Nonstop1h 45mUnited Airlines
Deal found 12/22$268
This American Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:29 pmIAD - TYS
1 stop5h 29mAmerican Airlines
Mon 1/55:40 pmTYS - IAD
1 stop6h 24mAmerican Airlines
Deal found 12/22$288
This United Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:55 pmIAD - TYS
Nonstop1h 56mUnited Airlines
Tue 12/305:45 amTYS - IAD
Nonstop1h 45mUnited Airlines
Deal found 12/22$301
This Kiwi.com deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:35 pmIAD - TYS
Nonstop1h 40mMultiple Airlines
Mon 12/296:00 amTYS - IAD
2 stops9h 10mMultiple Airlines
Deal found 12/22$305
This United Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:55 pmIAD - TYS
Nonstop1h 56mUnited Airlines
Sun 12/282:00 pmTYS - IAD
Nonstop1h 44mUnited Airlines
Deal found 12/22$323
This United Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:10 pmIAD - TYS
Nonstop1h 49mUnited Airlines
Mon 12/295:45 amTYS - IAD
Nonstop1h 45mUnited Airlines
Deal found 12/22$328
This United Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:55 pmIAD - TYS
Nonstop1h 53mUnited Airlines
Fri 12/2611:00 amTYS - IAD
1 stop5h 24mUnited Airlines
Deal found 12/22$333
This United Airlines deal was found by Cheapflights users on 12/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/299:00 amIAD - TYS
Nonstop1h 56mUnited Airlines
Mon 1/57:23 pmTYS - IAD
Nonstop1h 52mUnited Airlines
Deal found 12/23$334
This United Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/319:00 amIAD - TYS
Nonstop1h 56mUnited Airlines
Sat 1/35:45 amTYS - IAD
Nonstop1h 45mUnited Airlines
Deal found 12/22$350

Find flight deals from Dulles Intl to Knoxville

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Knoxville (TYS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 24, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$81
(Mytrip)

One-way from

$39
(Kiwi.com)

Popular in

September

Cheapest in

July

Average price

$339

Good round-trip deal

$133 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
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
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.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Knoxville that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 24, 2025.
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

Dulles Intl

Fly to

Knoxville

Route

Depart

Return

Price

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Thu 2/26

8:27 pm-10:07 pm

Nonstop1h 40m

Knoxville McGhee Tyson

Sun 3/1

5:53 pm-7:37 pm

Nonstop1h 44m

$82

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 2/14

1:20 pm-3:15 pm

Nonstop1h 55m

Knoxville McGhee Tyson

Wed 2/18

9:40 am-11:26 am

Nonstop1h 46m

$173

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 2/14

1:20 pm-3:15 pm

Nonstop1h 55m

Knoxville McGhee Tyson

Tue 2/17

7:25 pm-9:11 pm

Nonstop1h 46m

$173

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Fri 1/16

2:58 pm-11:40 am

2 stops20h 42m

Knoxville McGhee Tyson

Sun 1/18

1:39 pm-3:23 pm

Nonstop1h 44m

$174

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Thu 1/8

4:13 pm-5:53 pm

Nonstop1h 40m

Knoxville McGhee Tyson

Sat 1/17

5:59 pm-11:43 am

2 stops17h 44m

$183

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Wed 1/21

6:00 am-11:08 am

1 stop5h 08m

Knoxville McGhee Tyson

Sun 1/25

5:40 am-9:13 am

1 stop3h 33m

$196

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sun 5/24

6:00 am-11:06 am

1 stop5h 06m

Knoxville McGhee Tyson

Tue 6/2

4:15 pm-9:16 pm

1 stop5h 01m

$209

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Mon 5/25

7:50 pm-11:46 pm

1 stop3h 56m

Knoxville McGhee Tyson

Mon 6/1

7:20 pm-12:09 am

1 stop4h 49m

$209

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Mon 5/25

7:50 pm-11:46 pm

1 stop3h 56m

Knoxville McGhee Tyson

Tue 6/2

4:15 pm-9:16 pm

1 stop5h 01m

$209

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Thu 1/8

6:15 pm-11:45 pm

1 stop5h 30m

Knoxville McGhee Tyson

Sun 1/11

5:40 am-10:55 am

1 stop5h 15m

$239

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

Showing 1-10 of 22 results
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Compare providers for flights from Dulles Intl to Knoxville

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Dulles Intl Airport-Knoxville flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Knoxville. Price data was last updated on December 19, 2025.

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 74 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Knoxville (average of $46). Flying from Washington, D.C. Dulles Intl Airport to Knoxville in February is currently the most expensive (average of $263). 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?

Find hourly flight availability from Dulles Intl to Knoxville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 24, 2025.

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 66% 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?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Knoxville. Price data was last updated on December 20, 2025.

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

Reviews of airlines servicing Knoxville

Get insights into the airlines that provide service to Knoxville. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Knoxville. Reviews last updated December 24, 2025.
Read reviews from past customers who have flown Delta, 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.
Delta
7.9
Good
8,013 reviews

Food

7.3

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,013 reviews
Delta
7.9
Good
8,013 reviews

Food

7.3

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,110 reviews
Delta
7.9
Good
8,013 reviews

Food

7.3

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Allegiant Air
7.2
Good
702 reviews
Delta
7.9
Good
8,013 reviews

Food

7.3

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Knoxville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 14 daily inbound flights from Washington, D.C. Dulles Intl from 3 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 40m. Allegiant Air provides one of the quickest options available for as low as $82. The distance from Washington, D.C. Dulles Intl Airport to Knoxville is about 419 mi. Generally, flights for this route are nonstop.

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

    According to our current data, Allegiant Air ($40), Delta ($162), and United Airlines ($189) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Knoxville. Users have found that Allegiant Air is 86% 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 CommutAir (79%), United Airlines (79%) or Allegiant Air (78%) 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 $168 for a flight from Washington, D.C. Dulles Intl Airport to Knoxville. The cheapest flight overall is $40 while the most popular route, (Washington, D.C. Dulles Intl - Knoxville McGhee Tyson) is currently priced at $71.

  • 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Knoxville (average of $46). Flying from Washington, D.C. Dulles Intl Airport to Knoxville in February is currently the most expensive (average of $263). 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
Corbin
Morristown
Bryson City
Alcoa
Oak Ridge
Murphy

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Top 3 airlines flying from Dulles Intl to Knoxville

Discover the top 3 airlines that operate flights from Dulles Intl to Knoxville. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$51Average$91FlexibilityNo cancel feeOn-time88%
DeltaCheapest$208Average$233FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$220Average$372FlexibilityNo cancel feeOn-time69%

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