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Cheap flights from Knoxville to Washington, D.C. from $41

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Washington, D.C. departing on 11/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Knoxville to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Allegiant Air Logo
7:45 am - 9:11 amTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 26mnonstop
Allegiant Air Logo
8:16 am - 9:44 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 28mnonstop
$68Allegiant Air
Thu, Oct 29 - Sun, Nov 1
Allegiant Air Logo
7:45 am - 9:13 amTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 28mnonstop
Allegiant Air Logo
8:32 pm - 10:04 pmIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 32mnonstop
$75Allegiant Air
Thu, Nov 5 - Sun, Nov 22
Allegiant Air Logo
7:45 am - 9:13 amTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 28mnonstop
Allegiant Air Logo
9:48 am - 11:23 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 35mnonstop
$79Allegiant Air
Thu, Nov 5 - Sun, Nov 8
Allegiant Air Logo
6:00 am - 7:26 amTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 26mnonstop
Allegiant Air Logo
8:32 pm - 10:04 pmIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 32mnonstop
$79Allegiant Air
Sun, Nov 1 - Sun, Nov 22
Multiple Airlines Logo
5:39 pm - 7:09 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
25h 30m1 stop Orlando Sanford Intl
Multiple Airlines Logo
10:01 am - 11:29 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 28mnonstop
$144Multiple Airlines
Mon, Oct 19 - Thu, Oct 22
Multiple Airlines Logo
7:00 am - 7:09 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
12h 09m1 stop Orlando
Multiple Airlines Logo
10:01 am - 11:29 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 28mnonstop
$147Multiple Airlines
Fri, Oct 16 - Thu, Oct 22
Multiple Airlines Logo
7:00 am - 5:56 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
10h 56m2 stops Orlando Blountville Tri Cities TN/VA
Multiple Airlines Logo
10:01 am - 11:29 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 28mnonstop
$156Multiple Airlines
Mon, Oct 19 - Thu, Oct 29
United Airlines Logo
7:20 pm - 9:04 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 44mnonstop
United Airlines Logo
10:15 pm - 11:59 pmIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 44mnonstop
$193United Airlines
Sat, Sep 5 - Sun, Sep 6
United Airlines Logo
5:45 am - 7:25 amTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 40mnonstop
United Airlines Logo
10:15 pm - 11:59 pmIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 44mnonstop
$210United Airlines
Sat, Sep 5 - Thu, Sep 10
United Airlines Logo
7:20 pm - 9:04 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 44mnonstop
United Airlines Logo
6:42 pm - 8:24 pmIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 42mnonstop
$210United Airlines
Sat, Sep 5 - Tue, Sep 8

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

Our best Allegiant Air deals on Knoxville to Washington, D.C. Dulles Intl Airport flight tickets
Allegiant Air
Oct 29
TYS7:45 amKnoxville McGhee Tyson
1h 26m
IAD9:11 amWashington, D.C. Dulles Intl
Nov 1
IAD8:16 amWashington, D.C. Dulles Intl
1h 28m
TYS9:44 amKnoxville McGhee Tyson
$68
Allegiant Air
Nov 5
TYS7:45 amKnoxville McGhee Tyson
1h 28m
IAD9:13 amWashington, D.C. Dulles Intl
Nov 22
IAD8:32 pmWashington, D.C. Dulles Intl
1h 32m
TYS10:04 pmKnoxville McGhee Tyson
$75
Allegiant Air
Nov 1
TYS6:00 amKnoxville McGhee Tyson
1h 26m
IAD7:26 amWashington, D.C. Dulles Intl
Nov 22
IAD8:32 pmWashington, D.C. Dulles Intl
1h 32m
TYS10:04 pmKnoxville McGhee Tyson
$79

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

Our best United Airlines deals on Knoxville to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
Sep 5
TYS7:20 pmKnoxville McGhee Tyson
1h 44m
IAD9:04 pmWashington, D.C. Dulles Intl
Sep 6
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
TYS11:59 pmKnoxville McGhee Tyson
$193
United Airlines
Sep 5
TYS5:45 amKnoxville McGhee Tyson
1h 40m
IAD7:25 amWashington, D.C. Dulles Intl
Sep 10
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
TYS11:59 pmKnoxville McGhee Tyson
$210
United Airlines
Sep 4
TYS5:45 amKnoxville McGhee Tyson
1h 40m
IAD7:25 amWashington, D.C. Dulles Intl
Sep 11
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
TYS11:59 pmKnoxville McGhee Tyson
$215

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Washington, D.C. Dulles Intl Airport 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 August 10, 2026.
Use the filters below to find and compare flights from Knoxville to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Thu 10/29

7:45 am-9:11 am

Nonstop1h 26m

Washington, D.C. Dulles Intl

Sun 11/1

8:16 am-9:44 am

Nonstop1h 28m

$68

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Thu 11/5

7:45 am-9:13 am

Nonstop1h 28m

Washington, D.C. Dulles Intl

Sun 11/22

8:32 pm-10:04 pm

Nonstop1h 32m

$75

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Thu 11/5

7:45 am-9:13 am

Nonstop1h 28m

Washington, D.C. Dulles Intl

Sun 11/8

9:48 am-11:23 am

Nonstop1h 35m

$79

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Sun 11/1

6:00 am-7:26 am

Nonstop1h 26m

Washington, D.C. Dulles Intl

Sun 11/22

8:32 pm-10:04 pm

Nonstop1h 32m

$79

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Mon 10/19

5:39 pm-7:09 pm

1 stop25h 30m

Washington, D.C. Dulles Intl

Thu 10/22

10:01 am-11:29 am

Nonstop1h 28m

$144

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Fri 10/16

7:00 am-7:09 pm

1 stop12h 09m

Washington, D.C. Dulles Intl

Thu 10/22

10:01 am-11:29 am

Nonstop1h 28m

$147

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Mon 10/19

7:00 am-5:56 pm

2 stops10h 56m

Washington, D.C. Dulles Intl

Thu 10/29

10:01 am-11:29 am

Nonstop1h 28m

$156

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Sat 9/5

7:20 pm-9:04 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sun 9/6

10:15 pm-11:59 pm

Nonstop1h 44m

$193

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Sat 9/5

5:45 am-7:25 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

Thu 9/10

10:15 pm-11:59 pm

Nonstop1h 44m

$210

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Sat 9/5

7:20 pm-9:04 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Tue 9/8

6:42 pm-8:24 pm

Nonstop1h 42m

$210

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Knoxville to Washington, D.C. Dulles Intl Airport

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 typical price of a round-trip flight between Knoxville and Washington, D.C. Dulles Intl Airport?

Prices are currently low for flights on this route.

Typical prices usually range from $237 to $344.
The lowest price recently found on this route was $68.

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, March is the cheapest month to fly from Knoxville to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $130. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of March, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $143.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Friday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $439. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Washington, D.C. Dulles Intl Airport for around $972.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Knoxville in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $89 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $923 on average. Flights to Washington, D.C. Dulles Intl Airport from Knoxville in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

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

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

There are 4 cabin classes available to choose from on Knoxville to Washington, D.C. Dulles Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of August 2026, prices for Knoxville to Washington, D.C. Dulles Intl Airport flights are approximately 61% cheaper when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$176

Fastest flight time

1h 26m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Knoxville in the past 72 hours is $176. The best round-trip flight deal from Knoxville to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $394.
The fastest flight from Knoxville to Washington, D.C. Dulles Intl Airport takes 1h 26m
Direct flights go from Knoxville to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

Frequently asked questions about flying from Knoxville to Washington, D.C. Dulles Intl Airport

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

    Washington, D.C. Dulles Intl is 410.2 mi away from Knoxville McGhee Tyson. In terms of flight time, this usually takes a little over 1h 26m.

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

    Prices for flights from Knoxville McGhee Tyson Airport to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The required travel and health documents for your Washington, D.C. Dulles Intl 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 Washington, D.C. Dulles Intl 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 Knoxville to Washington, D.C. Dulles Intl Airport?

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

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

Compare and see reviews for airlines that fly from Knoxville to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Allegiant AirPriceFrom $44Free CancellationRating
7.3
679 reviews
Search Allegiant Air flights
United AirlinesPriceFrom $194Free CancellationRating
7.4
10,099 reviews
Search United Airlines flights

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

    United Airlines flight deals from Knoxville to Washington, D.C. Dulles Intl Airport start from $194 round-trip. Over the 16 United Airlines flights for this route in a normal week, average airfare is usually $327 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Arlington
Gettysburg
Winchester
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Silver Spring
Towson
Sterling
Colonial Beach
Springfield
Fairfax
Tysons
Edgewood

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Knoxville to Washington, D.C.. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to Washington, D.C. from Knoxville with this policy.

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

Once all potential Knoxville to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Knoxville to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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