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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 8/25. 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, Aug 15 - Mon, Aug 18
Allegiant Air Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
Allegiant Air Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
$83Allegiant Air
Find Deal
Fri, Aug 15 - Mon, Aug 18
Allegiant Air Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
Allegiant Air Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
$94Allegiant Air
Find Deal
Fri, Aug 15 - Fri, Aug 22
Allegiant Air Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
Allegiant Air Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
$97Allegiant Air
Find Deal
Mon, Aug 11 - Mon, Aug 18
United Airlines Logo
12:55 pm - 2:40 pmIAD-TYS
1h 45mnonstop
United Airlines Logo
5:45 am - 7:28 amTYS-IAD
1h 43mnonstop
$184United Airlines
Find Deal
Sat, Aug 30 - Sat, Sep 6
Logo
8:30 am - 9:10 pmIAD-TYS
12h 40m1 stop
Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
$187
Find Deal
Fri, Aug 15 - Mon, Aug 18
Logo
8:30 am - 9:10 pmIAD-TYS
12h 40m1 stop
Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
$188
Find Deal
Fri, Aug 15 - Mon, Aug 18
United Airlines Logo
8:45 am - 10:28 amIAD-TYS
1h 43mnonstop
United Airlines Logo
7:25 pm - 9:08 pmTYS-IAD
1h 43mnonstop
$189United Airlines
Find Deal
Wed, Sep 17 - Tue, Sep 23
Delta Logo
6:00 am - 9:30 amIAD-TYS
3h 30m1 stop
Delta Logo
5:45 am - 9:12 amTYS-IAD
3h 27m1 stop
$209Delta
Find Deal
Wed, Aug 20 - Sun, Aug 24
Delta Logo
6:00 am - 9:50 amIAD-TYS
3h 50m1 stop
Delta Logo
6:14 pm - 11:21 pmTYS-IAD
5h 07m1 stop
$214Delta
Find Deal
Sun, Aug 10 - Tue, Aug 19

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
Aug 15
IAD3:13 pmWashington, D.C. Dulles Intl
1h 34m
TYS4:47 pmKnoxville McGhee Tyson
Aug 18
TYS12:45 pmKnoxville McGhee Tyson
1h 38m
IAD2:23 pmWashington, D.C. Dulles Intl
$80
Find similar
Allegiant Air
Aug 15
IAD3:13 pmWashington, D.C. Dulles Intl
1h 34m
TYS4:47 pmKnoxville McGhee Tyson
Aug 18
TYS12:45 pmKnoxville McGhee Tyson
1h 38m
IAD2:23 pmWashington, D.C. Dulles Intl
$83
Find similar
Allegiant Air
Aug 15
IAD3:13 pmWashington, D.C. Dulles Intl
1h 34m
TYS4:47 pmKnoxville McGhee Tyson
Aug 22
TYS12:45 pmKnoxville McGhee Tyson
1h 38m
IAD2:23 pmWashington, D.C. Dulles Intl
$94
Find similar

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

Our best Delta deals on Washington, D.C. Dulles Intl Airport to Knoxville flight tickets
Delta
Aug 20
IAD6:00 amWashington, D.C. Dulles Intl
3h 30m
1 stop
TYS9:30 amKnoxville McGhee Tyson
Aug 24
TYS5:45 amKnoxville McGhee Tyson
3h 27m
1 stop
IAD9:12 amWashington, D.C. Dulles Intl
$209
Find similar
Delta
Aug 10
IAD6:00 amWashington, D.C. Dulles Intl
3h 50m
1 stop
TYS9:50 amKnoxville McGhee Tyson
Aug 19
TYS6:14 pmKnoxville McGhee Tyson
5h 07m
1 stop
IAD11:21 pmWashington, D.C. Dulles Intl
$214
Find similar
Delta
Sep 24
IAD6:00 amWashington, D.C. Dulles Intl
4h 56m
1 stop
TYS10:56 amKnoxville McGhee Tyson
Sep 27
TYS5:45 amKnoxville McGhee Tyson
5h 25m
1 stop
IAD11:10 amWashington, D.C. Dulles Intl
$230
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated July 29, 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

Fly to

Route

Depart

Return

Price

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Fri 8/15

3:13 pm-4:47 pm

Nonstop1h 34m

Knoxville McGhee Tyson

Mon 8/18

12:45 pm-2:23 pm

Nonstop1h 38m

$80

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Fri 8/15

3:13 pm-4:47 pm

Nonstop1h 34m

Knoxville McGhee Tyson

Mon 8/18

12:45 pm-2:23 pm

Nonstop1h 38m

$83

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Fri 8/15

3:13 pm-4:47 pm

Nonstop1h 34m

Knoxville McGhee Tyson

Fri 8/22

12:45 pm-2:23 pm

Nonstop1h 38m

$94

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Mon 8/11

3:13 pm-4:47 pm

Nonstop1h 34m

Knoxville McGhee Tyson

Mon 8/18

12:45 pm-2:23 pm

Nonstop1h 38m

$97

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 8/30

12:55 pm-2:40 pm

Nonstop1h 45m

Knoxville McGhee Tyson

Sat 9/6

5:45 am-7:28 am

Nonstop1h 43m

$184

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Fri 8/15

8:30 am-9:10 pm

1 stop12h 40m

Knoxville McGhee Tyson

Mon 8/18

12:45 pm-2:23 pm

Nonstop1h 38m

$187

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Fri 8/15

8:30 am-9:10 pm

1 stop12h 40m

Knoxville McGhee Tyson

Mon 8/18

12:45 pm-2:23 pm

Nonstop1h 38m

$188

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Wed 9/17

8:45 am-10:28 am

Nonstop1h 43m

Knoxville McGhee Tyson

Tue 9/23

7:25 pm-9:08 pm

Nonstop1h 43m

$189

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Wed 8/20

6:00 am-9:30 am

1 stop3h 30m

Knoxville McGhee Tyson

Sun 8/24

5:45 am-9:12 am

1 stop3h 27m

$209

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sun 8/10

6:00 am-9:50 am

1 stop3h 50m

Knoxville McGhee Tyson

Tue 8/19

6:14 pm-11:21 pm

1 stop5h 07m

$214

Flights are sorted by cheapest round-trip flights first.

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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 $200. 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 July instead. Flights to Knoxville in July, while not as cheap as those in May, still average around $259.

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 $289. 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 $376.

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 $266. 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 $346.

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 $362 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 $147 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 July 2025, prices for Washington, D.C. Dulles Intl Airport to Knoxville flights are approximately 57% 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)
Search flight deals

  • 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 $38Free CancellationRating
7.2
702 reviews
Search Allegiant Air flights
United AirlinesPriceFrom $238Free CancellationRating
7.4
8,896 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 $385, 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 8,896 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 $38 round-trip, depending on your selected dates, with average Allegiant Air deals seen on momondo around $83. Allegiant Air operates 2 flights to Knoxville from Washington, D.C. Dulles Intl Airport in an average week. Users have rated it 7.2/10 across 702 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
Lenoir City
Oak Ridge
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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