HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Knoxville

$68+ Cheap flights from Dulles Intl (IAD) to Knoxville (TYS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — TYS
Sep 9 — Sep 161
Wed 9/9
Wed 9/16
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Knoxville with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson are usually found in June or March, booked 40 days in advance, depart on a Thursday or Friday 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 August 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Thu 10/2210:01 am -
Nonstop1h 28m
Thu 10/297:45 am -
Nonstop1h 26m
Deal found 8/6$68
This Trip.com deal was found by Cheapflights users on 8/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2910:01 am -
Nonstop1h 28m
Sun 11/16:00 am -
Nonstop1h 26m
Deal found 8/7$70
This Trip.com deal was found by Cheapflights users on 8/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/510:03 am -
Nonstop1h 35m
Sun 11/87:30 am -
Nonstop1h 28m
Deal found 8/8$78
This FlightHub deal was found by Cheapflights users on 8/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:01 am -
Nonstop1h 28m
Sun 10/256:00 am -
Nonstop1h 26m
Deal found 8/7$83
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Thu 10/13:53 pm -
Nonstop1h 28m
Thu 10/82:37 pm -
Nonstop1h 26m
Deal found 8/8$113
This Gotogate deal was found by Cheapflights users on 8/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/13:53 pm -
Nonstop1h 28m
Sun 10/41:37 pm -
Nonstop1h 26m
Deal found 8/7$127

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 August 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$68
(Kiwi.com)

Popular in

January

Cheapest in

June

Average price

$330

Good round-trip deal

$150 or less

Good one-way deal

$46 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Knoxville McGhee Tyson flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Knoxville McGhee Tyson flights.
Search Deals
From Washington, D.C. Dulles Intl to Knoxville McGhee Tyson
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($91 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson.
Search Deals
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 August 10, 2026.
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

Return

Price

Cheapest round-trip

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Fri 10/30

10:14 am-3:26 pm

1 stop5h 12m

Knoxville McGhee Tyson

Mon 11/2

2:38 pm-8:14 pm

1 stop5h 36m

$230

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Thu 9/3

6:00 am-9:36 am

1 stop3h 36m

Knoxville McGhee Tyson

Thu 9/10

1:31 pm-5:11 pm

1 stop3h 40m

$247

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Fri 11/6

11:10 am-3:26 pm

1 stop4h 16m

Knoxville McGhee Tyson

Wed 11/11

6:00 am-11:35 am

1 stop5h 35m

$257

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Fri 8/21

6:42 pm-8:24 pm

Nonstop1h 42m

Knoxville McGhee Tyson

Mon 8/24

5:45 am-7:25 am

Nonstop1h 40m

$289

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Wed 9/9

10:15 pm-11:59 pm

Nonstop1h 44m

Knoxville McGhee Tyson

Tue 9/15

1:10 pm-2:56 pm

Nonstop1h 46m

$297

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Wed 9/9

12:50 pm-2:37 pm

Nonstop1h 47m

Knoxville McGhee Tyson

Sat 9/12

5:45 am-7:25 am

Nonstop1h 40m

$307

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Thu 9/17

10:15 pm-11:59 pm

Nonstop1h 44m

Knoxville McGhee Tyson

Sun 9/20

5:45 am-7:25 am

Nonstop1h 40m

$308

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Thu 9/3

10:15 pm-11:59 pm

Nonstop1h 44m

Knoxville McGhee Tyson

Tue 9/8

6:00 am-11:52 am

1 stop5h 52m

$328

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Fri 8/28

3:40 pm-8:53 pm

1 stop5h 13m

Knoxville McGhee Tyson

Sun 8/30

5:45 am-7:25 am

Nonstop1h 40m

$338
Quickest round-trip

Washington, D.C.Knoxville

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

IADTYS

Washington, D.C. Dulles Intl

Fri 12/4

8:30 am-10:00 am

Nonstop1h 30m

Knoxville McGhee Tyson

Mon 12/7

7:35 pm-9:10 pm

Nonstop1h 35m

$371

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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 August.
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
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?

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 39 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?

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 August 10, 2026.

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 60% 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 August 8, 2026.

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. 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 $220 and $419 in October.
The cheapest round-trip price found within the last 5 days was $68 on Allegiant Air (Oct 22-Oct 29).

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 August 10, 2026.
Read reviews from past customers who have flown Delta,United Airlines, andAllegiant 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
7.8
Good
8,497 reviews

Boarding

8.1

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.8

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,497 reviews
Delta
7.8
Good
8,497 reviews

Boarding

8.1

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.8

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
10,088 reviews
Delta
7.8
Good
8,497 reviews

Boarding

8.1

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.8

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Allegiant Air
7.3
Good
679 reviews
Delta
7.8
Good
8,497 reviews

Boarding

8.1

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.8

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 9 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 42m. Delta provides one of the quickest options available for as low as $289. 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 ($51), United Airlines ($203), and Delta ($208) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Knoxville. Users have found that Allegiant Air is 80% 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 Allegiant Air (88%), Mesa Airlines (85%) or Air Canada (71%) 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 $166 for a flight from Washington, D.C. Dulles Intl Airport to Knoxville. The cheapest flight overall is $38 while the most popular route, (Washington, D.C. Dulles Intl - Knoxville McGhee Tyson) is currently priced at $70.

  • 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
Alcoa

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 August 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$51Average$95FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$203Average$357FlexibilityNo cancel feeOn-time69%
DeltaCheapest$208Average$249FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.