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Knoxville

$42+ 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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — TYS
Oct 19 — Oct 261
Sun 10/19
Sun 10/26
1 adult, Economy
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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 75 days in advance, depart on a Friday or Wednesday and return on a Friday

Cheap 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 September 19, 2025.

Round-trip from

$84
(FlightHub)

One-way from

$42
(FlightHub)

Popular in

December

Cheapest in

July

Average price

$429

Good round-trip deal

$140 or less

Good one-way deal

$97 or less
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. 13% potential increase in price ($50 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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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Find 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 September 19, 2025.

This FlightHub deal was found by Cheapflights users on 9/17. 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.
Mon 10/209:36 pmIAD - TYS
Nonstop1h 40mAllegiant Air
Fri 10/245:59 pmTYS - IAD
Nonstop1h 44mAllegiant Air
Deal found 9/17$84
This FlightHub deal was found by Cheapflights users on 9/17. 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 11/208:23 pmIAD - TYS
Nonstop1h 40mAllegiant Air
Sun 11/235:49 pmTYS - IAD
Nonstop1h 44mAllegiant Air
Deal found 9/17$85
This Trip.com deal was found by Cheapflights users on 9/17. 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.
Fri 10/248:33 pmIAD - TYS
Nonstop1h 40mAllegiant Air
Fri 10/316:23 pmTYS - IAD
Nonstop1h 44mAllegiant Air
Deal found 9/17$86
This FlightHub deal was found by Cheapflights users on 9/17. 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.
Fri 10/248:33 pmIAD - TYS
Nonstop1h 40mAllegiant Air
Mon 10/2711:00 amTYS - IAD
Nonstop1h 44mAllegiant Air
Deal found 9/17$87
This FlightHub deal was found by Cheapflights users on 9/17. 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.
Wed 12/242:35 pmIAD - TYS
Nonstop1h 40mAllegiant Air
Wed 12/3112:01 pmTYS - IAD
Nonstop1h 44mAllegiant Air
Deal found 9/17$94
This Booking.com deal was found by Cheapflights users on 9/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:35 pmIAD - TYS
Nonstop1h 40mAllegiant Air
Sat 12/272:23 pmTYS - IAD
Nonstop1h 44mAllegiant Air
Deal found 9/17$115
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Fri 10/248:33 pmIAD - TYS
Nonstop1h 40mMultiple Airlines
Mon 10/278:45 amTYS - IAD
1 stop12h 53mMultiple Airlines
Deal found 9/16$171

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 September 19, 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

Tue 10/28

10:15 pm-11:59 pm

Nonstop1h 44m

Knoxville McGhee Tyson

Fri 10/31

9:50 am-11:33 am

Nonstop1h 43m

$205

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 10/25

6:05 am-11:04 am

1 stop4h 59m

Knoxville McGhee Tyson

Mon 10/27

8:10 pm-12:12 am

1 stop4h 02m

$209

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 10/4

5:25 pm-11:44 pm

1 stop6h 19m

Knoxville McGhee Tyson

Tue 10/7

2:55 pm-7:26 pm

1 stop4h 31m

$219

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 11/1

5:10 pm-9:13 pm

1 stop4h 03m

Knoxville McGhee Tyson

Wed 11/5

7:45 am-11:29 am

1 stop3h 44m

$230

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Wed 9/24

6:00 am-11:41 am

1 stop5h 41m

Knoxville McGhee Tyson

Tue 9/30

5:45 am-11:40 am

1 stop5h 55m

$244

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Wed 9/24

6:00 am-11:41 am

1 stop5h 41m

Knoxville McGhee Tyson

Wed 10/1

5:45 am-11:40 am

1 stop5h 55m

$244

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Fri 10/10

8:45 am-10:29 am

Nonstop1h 44m

Knoxville McGhee Tyson

Sat 10/11

9:55 am-11:39 am

Nonstop1h 44m

$249

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 10/18

8:45 am-10:29 am

Nonstop1h 44m

Knoxville McGhee Tyson

Mon 10/20

7:26 pm-9:10 pm

Nonstop1h 44m

$253

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 10/18

8:45 am-10:29 am

Nonstop1h 44m

Knoxville McGhee Tyson

Sat 10/25

9:55 am-11:39 am

Nonstop1h 44m

$254

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 10/4

12:59 pm-2:45 pm

Nonstop1h 46m

Knoxville McGhee Tyson

Tue 10/7

7:26 pm-9:10 pm

Nonstop1h 44m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 23 results
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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 September 12, 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Knoxville (average of $295). Flying from Washington, D.C. Dulles Intl Airport to Knoxville in March is currently the most expensive (average of $376). 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 September 19, 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 69% on the flight price compared to flying at noon, 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 September 14, 2025.

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

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 September 19, 2025.
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
8,926 reviews

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
Allegiant Air
7.2
Good
699 reviews
United Airlines
7.4
Good
8,926 reviews

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

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 15 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 44m. United Airlines provides one of the quickest options available for as low as $205. 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 ($42), and United Airlines ($233) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Knoxville. Users have found that Allegiant Air is 87% 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 (92%), Ethiopian Air (77%) or CommutAir (77%) 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 $182 for a flight from Washington, D.C. Dulles Intl Airport to Knoxville. The cheapest flight overall is $43 while the most popular route, (Washington, D.C. Dulles Intl - Knoxville McGhee Tyson) is currently priced at $84.

  • 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Knoxville (average of $295). Flying from Washington, D.C. Dulles Intl Airport to Knoxville in March is currently the most expensive (average of $376). 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
Morristown
Cherokee
Corbin
Alcoa
Oak Ridge
Murphy

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Top 2 airlines flying from Dulles Intl to Knoxville

Discover the top 2 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 September 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$42Average$99FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$233Average$381FlexibilityNo cancel feeOn-time69%

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