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Cheap flights from Washington, D.C. Dulles Intl Airport to Knoxville from $43

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 12/18. 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

Enter your travel dates to find the best prices.
Allegiant Air Logo
4:13 pm - 5:53 pm
IAD
-
TYS
1h 40mnonstop
Allegiant Air Logo
1:39 pm - 3:23 pm
TYS
-
IAD
1h 44mnonstop
$83Allegiant Air
Thu, Jan 15 - Thu, Jan 22
Allegiant Air Logo
4:57 pm - 6:37 pm
IAD
-
TYS
1h 40mnonstop
Allegiant Air Logo
1:39 pm - 3:23 pm
TYS
-
IAD
1h 44mnonstop
$87Allegiant Air
Sat, Jan 3 - Thu, Jan 15
Allegiant Air Logo
8:16 pm - 9:56 pm
IAD
-
TYS
1h 40mnonstop
Allegiant Air Logo
5:42 pm - 7:26 pm
TYS
-
IAD
1h 44mnonstop
$96Allegiant Air
Thu, Dec 18 - Sun, Dec 21
Allegiant Air Logo
2:35 pm - 4:15 pm
IAD
-
TYS
1h 40mnonstop
Allegiant Air Logo
12:01 pm - 1:45 pm
TYS
-
IAD
1h 44mnonstop
$113Allegiant Air
Wed, Dec 24 - Wed, Dec 31
Allegiant Air Logo
8:16 pm - 9:56 pm
IAD
-
TYS
1h 40mnonstop
Allegiant Air Logo
12:01 pm - 1:45 pm
TYS
-
IAD
1h 44mnonstop
$119Allegiant Air
Sun, Dec 21 - Wed, Dec 31
Multiple Airlines Logo
8:35 am - 10:28 pm
IAD
-
TYS
13h 53m1 stop
Multiple Airlines Logo
1:39 pm - 3:23 pm
TYS
-
IAD
1h 44mnonstop
$135Multiple Airlines
Mon, Jan 12 - Sun, Jan 18
Multiple Airlines Logo
4:13 pm - 5:53 pm
IAD
-
TYS
1h 40mnonstop
Multiple Airlines Logo
3:53 pm - 10:42 am
TYS
-
IAD
18h 49m1 stop
$136Multiple Airlines
Sun, Jan 11 - Wed, Jan 21
Multiple Airlines Logo
4:13 pm - 5:53 pm
IAD
-
TYS
1h 40mnonstop
Multiple Airlines Logo
5:30 pm - 7:40 am
TYS
-
IAD
14h 10m1 stop
$139Multiple Airlines
Thu, Jan 8 - Sat, Jan 10
Multiple Airlines Logo
2:58 pm - 11:40 am
IAD
-
TYS
20h 42m2 stops
Multiple Airlines Logo
1:39 pm - 3:23 pm
TYS
-
IAD
1h 44mnonstop
$140Multiple Airlines
Fri, Jan 9 - Sun, Jan 11
Multiple Airlines Logo
4:57 pm - 6:37 pm
IAD
-
TYS
1h 40mnonstop
Multiple Airlines Logo
5:30 pm - 8:04 am
TYS
-
IAD
14h 34m1 stop
$144Multiple Airlines
Sat, Jan 3 - Sat, Jan 17

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
Jan 15
IAD4:13 pmWashington, D.C. Dulles Intl
1h 40m
TYS5:53 pmKnoxville McGhee Tyson
Jan 22
TYS1:39 pmKnoxville McGhee Tyson
1h 44m
IAD3:23 pmWashington, D.C. Dulles Intl
$83
Find similar
Allegiant Air
Jan 3
IAD4:57 pmWashington, D.C. Dulles Intl
1h 40m
TYS6:37 pmKnoxville McGhee Tyson
Jan 15
TYS1:39 pmKnoxville McGhee Tyson
1h 44m
IAD3:23 pmWashington, D.C. Dulles Intl
$87
Find similar
Allegiant Air
Dec 27
IAD4:57 pmWashington, D.C. Dulles Intl
1h 40m
TYS6:37 pmKnoxville McGhee Tyson
Jan 3
TYS2:23 pmKnoxville McGhee Tyson
1h 44m
IAD4:07 pmWashington, D.C. Dulles Intl
$96
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
Jan 10
IAD8:00 amWashington, D.C. Dulles Intl
5h 50m
1 stop
TYS1:50 pmKnoxville McGhee Tyson
Jan 11
TYS5:40 amKnoxville McGhee Tyson
5h 15m
1 stop
IAD10:55 amWashington, D.C. Dulles Intl
$209
Find similar
Delta
Dec 13
IAD12:30 pmWashington, D.C. Dulles Intl
6h 28m
1 stop
TYS6:58 pmKnoxville McGhee Tyson
Dec 19
TYS5:40 amKnoxville McGhee Tyson
3h 31m
1 stop
IAD9:11 amWashington, D.C. Dulles Intl
$321
Find similar
Delta
Dec 18
IAD7:01 amWashington, D.C. Dulles Intl
6h 43m
1 stop
TYS1:44 pmKnoxville McGhee Tyson
Dec 20
TYS6:00 amKnoxville McGhee Tyson
3h 46m
1 stop
IAD9:46 amWashington, D.C. Dulles Intl
$354
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 December 11, 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

Thu 1/15

4:13 pm-5:53 pm

Nonstop1h 40m

Knoxville McGhee Tyson

Thu 1/22

1:39 pm-3:23 pm

Nonstop1h 44m

$83

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 1/3

4:57 pm-6:37 pm

Nonstop1h 40m

Knoxville McGhee Tyson

Thu 1/15

1:39 pm-3:23 pm

Nonstop1h 44m

$87

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Thu 12/18

8:16 pm-9:56 pm

Nonstop1h 40m

Knoxville McGhee Tyson

Sun 12/21

5:42 pm-7:26 pm

Nonstop1h 44m

$96

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Wed 12/24

2:35 pm-4:15 pm

Nonstop1h 40m

Knoxville McGhee Tyson

Wed 12/31

12:01 pm-1:45 pm

Nonstop1h 44m

$113

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sun 12/21

8:16 pm-9:56 pm

Nonstop1h 40m

Knoxville McGhee Tyson

Wed 12/31

12:01 pm-1:45 pm

Nonstop1h 44m

$119

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Mon 1/12

8:35 am-10:28 pm

1 stop13h 53m

Knoxville McGhee Tyson

Sun 1/18

1:39 pm-3:23 pm

Nonstop1h 44m

$135

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sun 1/11

4:13 pm-5:53 pm

Nonstop1h 40m

Knoxville McGhee Tyson

Wed 1/21

3:53 pm-10:42 am

1 stop18h 49m

$136

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 1/10

5:30 pm-7:40 am

1 stop14h 10m

$139

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Fri 1/9

2:58 pm-11:40 am

2 stops20h 42m

Knoxville McGhee Tyson

Sun 1/11

1:39 pm-3:23 pm

Nonstop1h 44m

$140

Washington, D.C.Knoxville

IAD - TYS

IADTYS

Washington, D.C. Dulles Intl

Sat 1/3

4:57 pm-6:37 pm

Nonstop1h 40m

Knoxville McGhee Tyson

Sat 1/17

5:30 pm-8:04 am

1 stop14h 34m

$144

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest 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 July is, on average, the cheapest month to fly to Knoxville from Washington, D.C. Dulles Intl Airport, with most prices found around $126. If you aren’t able to travel during the month of July, then book flights to Knoxville from Washington, D.C. Dulles Intl Airport during May instead. Flights to Knoxville in May, while not as cheap as those in July, still average around $199.

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 Wednesday. Travelers who choose to depart for Knoxville on a Wednesday will often find tickets for as low as $272. 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 $363.

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 $247. 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 in the morning when prices are around $321.

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 $302 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 $103 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 December 2025, prices for Washington, D.C. Dulles Intl Airport to Knoxville flights are approximately 64% 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

$46

Fastest flight time

1h 30m

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 $46. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Knoxville found on momondo in the last 72 hours is $145.
The fastest flight from Washington, D.C. Dulles Intl Airport to Knoxville takes 1h 30m
Direct flights go from Washington, D.C. Dulles Intl Airport to Knoxville every day.
There is 1 airport in Knoxville. From Washington, D.C. Dulles Intl Airport there are direct flights to 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 30m.

  • 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 $47Free CancellationRating
7.2
699 reviews
Search Allegiant Air flights
DeltaPriceFrom $208Free CancellationRating
7.9
8,005 reviews
Search Delta flights
United AirlinesPriceFrom $213Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights

  • United Airlines Flights From Washington, D.C. Dulles Intl Airport to Knoxville

    United Airlines operates around 21 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 $369, but momondo users have found United Airlines deals from Washington, D.C. Dulles Intl Airport to Knoxville from as low as $213 round-trip. United Airlines has been scored 7.4/10 in 9,095 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 $47 round-trip, depending on your selected dates, with average Allegiant Air deals seen on momondo around $92. Allegiant Air operates 1 flight to Knoxville from Washington, D.C. Dulles Intl Airport in an average week. Users have rated it 7.2/10 across 699 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
Maryville
Crossville
Murphy
Alcoa
Oak Ridge
Lenoir City
Newport
Kodak
Dandridge
Jefferson City
Clinton
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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