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Cheap flights from Washington, D.C. Dulles Intl Airport to Knoxville from $40

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Knoxville departing on 7/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Knoxville

Cheap round-trip flights

Allegiant Air Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
Allegiant Air Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
$80Allegiant Air
Find Deal
Fri, Jul 18 - Mon, Jul 21
Allegiant Air Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
Allegiant Air Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
$81Allegiant Air
Find Deal
Fri, Aug 1 - Fri, Aug 8
 Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
 Logo
5:11 pm - 11:08 amTYS-IAD
17h 57m2 stops
Fri, Jul 25 - Sat, Aug 9
United Airlines Logo
8:45 am - 10:27 amIAD-TYS
1h 42mnonstop
United Airlines Logo
7:35 pm - 9:10 pmTYS-IAD
1h 35mnonstop
$189United Airlines
Find Deal
Tue, Jul 15 - Tue, Jul 22
 Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
 Logo
10:54 am - 10:44 amTYS-IAD
23h 50m2 stops
Mon, Aug 18 - Wed, Aug 20
United Airlines Logo
10:13 pm - 11:59 pmIAD-TYS
1h 46mnonstop
United Airlines Logo
5:45 am - 7:26 amTYS-IAD
1h 41mnonstop
$194United Airlines
Find Deal
Thu, Jul 3 - Thu, Jul 10
Delta Logo
3:31 pm - 10:11 pmIAD-TYS
6h 40m1 stop
Delta Logo
5:30 am - 11:50 amTYS-IAD
6h 20m1 stop
$209Delta
Find Deal
Fri, Jul 4 - Wed, Jul 9
Delta Logo
12:45 pm - 5:24 pmIAD-TYS
4h 39m1 stop
Delta Logo
5:30 am - 9:19 amTYS-IAD
3h 49m1 stop
$219Delta
Find Deal
Tue, Jul 29 - Wed, Aug 6
American Airlines Logo
5:39 pm - 10:25 pmIAD-TYS
4h 46m1 stop
American Airlines Logo
5:05 am - 8:33 amTYS-IAD
3h 28m1 stop
$260American Airlines
Find Deal
Tue, Jul 29 - Sun, Aug 3
American Airlines Logo
5:39 pm - 10:25 pmIAD-TYS
4h 46m1 stop
American Airlines Logo
7:52 pm - 11:58 pmTYS-IAD
4h 06m1 stop
$320American Airlines
Find Deal
Sat, Aug 2 - Tue, Aug 5

Allegiant Air flights from Washington, D.C. Dulles Intl Airport to Knoxville

Our best Allegiant Air deals on Washington, D.C. Dulles Intl Airport to Knoxville flight tickets
Allegiant Air
Jul 18
IAD3:13 pmWashington, D.C. Dulles Intl
1h 34m
TYS4:47 pmKnoxville McGhee Tyson
Jul 21
TYS12:45 pmKnoxville McGhee Tyson
1h 38m
IAD2:23 pmWashington, D.C. Dulles Intl
Allegiant Air
Aug 1
IAD3:13 pmWashington, D.C. Dulles Intl
1h 34m
TYS4:47 pmKnoxville McGhee Tyson
Aug 8
TYS12:45 pmKnoxville McGhee Tyson
1h 38m
IAD2:23 pmWashington, D.C. Dulles Intl
Allegiant Air
Sep 26
IAD9:34 pmWashington, D.C. Dulles Intl
1h 40m
TYS11:14 pmKnoxville McGhee Tyson
Sep 29
TYS7:00 pmKnoxville McGhee Tyson
1h 44m
IAD8:44 pmWashington, D.C. Dulles Intl

United Airlines flights from Washington, D.C. Dulles Intl Airport to Knoxville

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to Knoxville flight tickets
United Airlines
Jul 15
IAD8:45 amWashington, D.C. Dulles Intl
1h 42m
TYS10:27 amKnoxville McGhee Tyson
Jul 22
TYS7:35 pmKnoxville McGhee Tyson
1h 35m
IAD9:10 pmWashington, D.C. Dulles Intl
United Airlines
Jul 3
IAD10:13 pmWashington, D.C. Dulles Intl
1h 46m
TYS11:59 pmKnoxville McGhee Tyson
Jul 10
TYS5:45 amKnoxville McGhee Tyson
1h 41m
IAD7:26 amWashington, D.C. Dulles Intl
United Airlines
Jul 15
IAD8:45 amWashington, D.C. Dulles Intl
1h 42m
TYS10:27 amKnoxville McGhee Tyson
Jul 22
TYS7:00 amKnoxville McGhee Tyson
4h 55m
1 stop
IAD11:55 amWashington, D.C. Dulles Intl

See travel insights to Knoxville from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Knoxville

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Knoxville?

The month of May is, on average, the cheapest month to fly to Knoxville from Washington, D.C. Dulles Intl Airport, with most prices found around $168. If you aren’t able to travel during the month of May, then book flights to Knoxville from Washington, D.C. Dulles Intl Airport during August instead. Flights to Knoxville in August, while not as cheap as those in May, still average around $289.

What is the cheapest day to depart on your flight to Knoxville?

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to Knoxville is on a Saturday. Travelers who choose to depart for Knoxville on a Saturday will often find tickets for as low as $298. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. Dulles Intl Airport to Knoxville for around $357.

What is the cheapest time of day to depart on your flight to Knoxville?

In the afternoon is the cheapest time of day to fly from Washington, D.C. Dulles Intl Airport to Knoxville when you can find flight prices for as low as $281. Flying to Knoxville in the afternoon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Knoxville is at noon when prices are around $342.

What is the cheapest Washington, D.C. Dulles Intl to Knoxville McGhee Tyson flight route?

Fly from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson for the best Washington, D.C. Dulles Intl - Knoxville McGhee Tyson flight prices

How far in advance should I book a flight to Knoxville?

You are more likely to see cheaper flights to Knoxville from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Knoxville for around $360 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Knoxville from Washington, D.C. Dulles Intl Airport for as low as $104 on momondo.

What cabin class options are available on Washington, D.C. Dulles Intl to Knoxville McGhee Tyson flights?

There are 2 cabin classes available to choose from on Washington, D.C. Dulles Intl to Knoxville McGhee Tyson flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Washington, D.C. Dulles Intl Airport to Knoxville flight prices changed over time?

As of June 2025, prices for Washington, D.C. Dulles Intl Airport to Knoxville flights are approximately 56% cheaper when compared to flights at the same time last year.

When to book flights from Washington, D.C. Dulles Intl Airport to Knoxville

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Knoxville according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to Knoxville (IAD to TYS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Knoxville

Best Price Found

$40

Fastest flight time

1h 34m

Direct flights

Every day

Airports in Knoxville

1 airport
The best one-way flight to Knoxville from Washington, D.C. Dulles Intl Airport in the past 72 hours is $40. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Knoxville found on momondo in the last 72 hours is $80.
The fastest flight from Washington, D.C. Dulles Intl Airport to Knoxville takes 1h 34m
Direct flights go from Washington, D.C. Dulles Intl Airport to Knoxville every day.
There is 1 airport near Knoxville: Knoxville McGhee Tyson (TYS)

  • How far is Washington, D.C. Dulles Intl to Knoxville McGhee Tyson by plane?

    A flight from Washington, D.C. Dulles Intl to Knoxville McGhee Tyson will travel around 410.2 mi. A reasonable flight in good conditions will take 1h 34m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Knoxville McGhee Tyson Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Knoxville McGhee Tyson Airport were last updated today.

  • How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Knoxville McGhee Tyson Airport?

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Knoxville McGhee Tyson Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to Knoxville McGhee Tyson Airport.

  • What documentation or ID do you need to fly to Knoxville McGhee Tyson Airport?

    The required travel and health documents for your Knoxville McGhee Tyson Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Knoxville McGhee Tyson Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Washington, D.C. Dulles Intl Airport to Knoxville?

  • What is the most popular airline from Washington, D.C. Dulles Intl Airport to Knoxville?


Best airlines flying from Washington, D.C. Dulles Intl Airport to Knoxville

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Knoxville with momondo
Airline
Rating
Free Cancellation
Price
Allegiant AirPriceFrom $37Free CancellationRating
7.3
722 reviews
Search Allegiant Air flights
United AirlinesPriceFrom $238Free CancellationRating
7.4
8,810 reviews
Search United Airlines flights
  • United Airlines Flights From Washington, D.C. Dulles Intl Airport to Knoxville

    United Airlines operates around 28 flights from Washington, D.C. Dulles Intl Airport to Knoxville every week. The average price of these flights found in the last 72 hours has been $380, but momondo users have found United Airlines deals from Washington, D.C. Dulles Intl Airport to Knoxville from as low as $238 round-trip. United Airlines has been scored 7.4/10 in 8,810 reviews.

  • Allegiant Air Flights From Washington, D.C. Dulles Intl Airport to Knoxville

    Allegiant Air is also a popular choice for this route. Allegiant Air flight deals for Washington, D.C. Dulles Intl Airport to Knoxville start from as low as $37 round-trip, depending on your selected dates, with average Allegiant Air deals seen on momondo around $80. Allegiant Air operates 2 flights to Knoxville from Washington, D.C. Dulles Intl Airport in an average week. Users have rated it 7.3/10 across 722 reviews.


Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Pigeon Forge
Gatlinburg
Cherokee
Bryson City
Morristown
Corbin
Crossville
Maryville
Murphy
Newport
Alcoa
Oak Ridge
Lenoir City
Kodak
Dandridge
Clinton
Jefferson City
Rockford

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Knoxville?

It is quick and easy to find Washington, D.C. to Knoxville flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Knoxville that suits you.

Can I find flights from Washington, D.C. to Knoxville with flexible booking policies on momondo?

momondo does allow users to show only those flights to Knoxville from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Washington, D.C. to Knoxville?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Knoxville.

I’m not ready to book a flight from Washington, D.C. to Knoxville right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Knoxville from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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