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Cheap flights from Knoxville to Washington, D.C. from $79

This is the cheapest round-trip 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 11/1. 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
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
Allegiant Air Logo
3:42 pm - 5:11 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 29mnonstop
Allegiant Air Logo
8:32 pm - 10:04 pmIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 32mnonstop
$80Allegiant Air
Thu, Nov 19 - Sun, Nov 22
Multiple Airlines Logo
10:55 am - 8:11 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
9h 16m1 stop Fort Lauderdale
Multiple Airlines Logo
8:16 am - 9:44 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 28mnonstop
$140Multiple Airlines
Sat, Oct 17 - Sun, Oct 25
Multiple Airlines Logo
10:55 am - 8:11 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
9h 16m1 stop Fort Lauderdale
Multiple Airlines Logo
10:01 am - 11:29 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 28mnonstop
$145Multiple Airlines
Sat, Oct 17 - Thu, Oct 29
American Airlines Logo
10:55 am - 12:34 pmTYS  Knoxville McGhee Tyson-DCA Washington, D.C. Reagan-National
1h 39mnonstop
American Airlines Logo
7:45 pm - 9:33 pmDCA  Washington, D.C. Reagan-National-TYS Knoxville McGhee Tyson
1h 48mnonstop
$147American Airlines
Thu, Oct 8 - Tue, Oct 13
American Airlines Logo
7:17 am - 9:00 amTYS  Knoxville McGhee Tyson-DCA Washington, D.C. Reagan-National
1h 43mnonstop
American Airlines Logo
3:42 pm - 5:33 pmDCA  Washington, D.C. Reagan-National-TYS Knoxville McGhee Tyson
1h 51mnonstop
$147American Airlines
Thu, Oct 8 - Tue, Oct 13
United Airlines Logo
5:45 am - 7:25 amTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 40mnonstop
United Airlines Logo
9:00 am - 10:37 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 37mnonstop
$147United Airlines
Sat, Sep 26 - Tue, Sep 29
United Airlines Logo
5:45 am - 7:25 amTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 40mnonstop
United Airlines Logo
9:00 am - 10:37 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 37mnonstop
$147United Airlines
Thu, Sep 24 - Mon, Sep 28
Southwest Logo
7:55 am - 9:30 amTYS  Knoxville McGhee Tyson-BWI Baltimore/Washington
1h 35mnonstop
Southwest Logo
6:05 pm - 7:45 pmBWI  Baltimore/Washington-TYS Knoxville McGhee Tyson
1h 40mnonstop
$167Southwest
Tue, Nov 3 - Sat, Nov 7
Southwest Logo
8:05 am - 9:45 amTYS  Knoxville McGhee Tyson-BWI Baltimore/Washington
1h 40mnonstop
Southwest Logo
6:00 pm - 7:35 pmBWI  Baltimore/Washington-TYS Knoxville McGhee Tyson
1h 35mnonstop
$167Southwest
Wed, Sep 30 - Sat, Oct 3

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United Airlines flights from Knoxville to Washington, D.C.

Our best United Airlines deals on Knoxville to Washington, D.C. flight tickets
United Airlines
Sep 26
TYS5:45 amKnoxville McGhee Tyson
1h 40m
IAD7:25 amWashington, D.C. Dulles Intl
Sep 28
IAD9:00 amWashington, D.C. Dulles Intl
1h 37m
TYS10:37 amKnoxville McGhee Tyson
$147
United Airlines
Sep 9
TYS7:20 pmKnoxville McGhee Tyson
1h 44m
IAD9:04 pmWashington, D.C. Dulles Intl
Sep 16
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
TYS11:59 pmKnoxville McGhee Tyson
$153
United Airlines
Sep 3
TYS1:00 pmKnoxville McGhee Tyson
1h 46m
IAD2:46 pmWashington, D.C. Dulles Intl
Sep 8
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
TYS11:59 pmKnoxville McGhee Tyson
$159

Delta flights from Knoxville to Washington, D.C.

Our best Delta deals on Knoxville to Washington, D.C. flight tickets
Delta
Oct 8
TYS5:40 amKnoxville McGhee Tyson
3h 39m
1 stop
IAD9:19 amWashington, D.C. Dulles Intl
Oct 13
IAD12:29 pmWashington, D.C. Dulles Intl
4h 58m
1 stop
TYS5:27 pmKnoxville McGhee Tyson
$167
Delta
Sep 9
TYS4:00 pmKnoxville McGhee Tyson
4h 14m
1 stop
IAD8:14 pmWashington, D.C. Dulles Intl
Sep 16
IAD6:00 amWashington, D.C. Dulles Intl
3h 29m
1 stop
TYS9:29 amKnoxville McGhee Tyson
$173
Delta
Sep 3
TYS5:40 amKnoxville McGhee Tyson
3h 40m
1 stop
IAD9:20 amWashington, D.C. Dulles Intl
Sep 8
IAD6:00 amWashington, D.C. Dulles Intl
4h 44m
1 stop
TYS10:44 amKnoxville McGhee Tyson
$179

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Washington, D.C. 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 14, 2026.
Use the filters below to find and compare flights from Knoxville to Washington, D.C. 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

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

Thu 11/19

3:42 pm-5:11 pm

Nonstop1h 29m

Washington, D.C. Dulles Intl

Sun 11/22

8:32 pm-10:04 pm

Nonstop1h 32m

$80

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Sat 10/17

10:55 am-8:11 pm

1 stop9h 16m

Washington, D.C. Dulles Intl

Sun 10/25

8:16 am-9:44 am

Nonstop1h 28m

$140

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Sat 10/17

10:55 am-8:11 pm

1 stop9h 16m

Washington, D.C. Dulles Intl

Thu 10/29

10:01 am-11:29 am

Nonstop1h 28m

$145

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - DCA Washington, D.C. Reagan-National

TYSDCA

Knoxville McGhee Tyson

Thu 10/8

10:55 am-12:34 pm

Nonstop1h 39m

Washington, D.C. Reagan-National

Tue 10/13

7:45 pm-9:33 pm

Nonstop1h 48m

$147

KnoxvilleWashington, D.C.

TYS Knoxville McGhee Tyson - DCA Washington, D.C. Reagan-National

TYSDCA

Knoxville McGhee Tyson

Thu 10/8

7:17 am-9:00 am

Nonstop1h 43m

Washington, D.C. Reagan-National

Tue 10/13

3:42 pm-5:33 pm

Nonstop1h 51m

$147

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Sat 9/26

5:45 am-7:25 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

Tue 9/29

9:00 am-10:37 am

Nonstop1h 37m

$147

KnoxvilleWashington, D.C.

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

TYSIAD

Knoxville McGhee Tyson

Thu 9/24

5:45 am-7:25 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

Mon 9/28

9:00 am-10:37 am

Nonstop1h 37m

$147

KnoxvilleBaltimore

TYS Knoxville McGhee Tyson - BWI Baltimore/Washington

TYSBWI

Knoxville McGhee Tyson

Tue 11/3

7:55 am-9:30 am

Nonstop1h 35m

Baltimore/Washington

Sat 11/7

6:05 pm-7:45 pm

Nonstop1h 40m

$167

KnoxvilleBaltimore

TYS Knoxville McGhee Tyson - BWI Baltimore/Washington

TYSBWI

Knoxville McGhee Tyson

Wed 9/30

8:05 am-9:45 am

Nonstop1h 40m

Baltimore/Washington

Sat 10/3

6:00 pm-7:35 pm

Nonstop1h 35m

$167

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 Washington, D.C. from

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

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.?

Prices are currently low for flights on this route.

Typical prices usually range from $304 to $419.
The lowest price recently found on this route was $79.

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

The month of February is, on average, the cheapest month to fly to Washington, D.C. from Knoxville, with most prices found around $215. If you’re not able to fly to Washington, D.C. in February, then January is your next best option. Flight prices from Knoxville to Washington, D.C. during January average around $218.

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

On average, the least expensive day to fly to Washington, D.C. from Knoxville is on a Friday. momondo users have found tickets for Friday departures for as low as $365. However, this price may fluctuate depending on the airline, the season, and holidays. 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. for around $720.

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

In the afternoon is the cheapest time of day to fly from Knoxville to Washington, D.C. when you can find flight prices for as low as $298. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the evening because they tend to be around $902. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

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

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

Can stopping save me money on Knoxville to Washington, D.C. flights?

No. A direct flight is the cheapest option for a flight between Knoxville to Washington, D.C..

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

As of August 2026, prices for Knoxville to Washington, D.C. flights are approximately 57% cheaper when compared to flights at the same time last year.

When to book flights from Knoxville to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from Knoxville to Washington, D.C. 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. (TYS to WAS) flight deals and tips

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

Best Price Found

$176

Fastest flight time

1h 26m

Direct flights

Every day

Airports in Washington, D.C.

2 airports
The best one-way flight to Washington, D.C. from Knoxville in the past 72 hours is $176. The best round-trip flight deal from Knoxville to Washington, D.C. found on momondo in the last 72 hours is $289.
The fastest flight from Knoxville to Washington, D.C. takes 1h 26m
Direct flights go from Knoxville to Washington, D.C. every day.
There are 2 airports in Washington, D.C.. From Knoxville there are direct flights to Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD).
Search flight deals

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

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

    Washington, D.C. is 428.6 mi away from Knoxville McGhee Tyson. A reasonable flight in good conditions will take 1h 26m.

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

    Prices for flights from Knoxville McGhee Tyson Airport to Washington, D.C. refresh daily.

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

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

    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..

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

    The necessary travel and health documents for your Washington, D.C. trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

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

Best airlines flying from Knoxville to Washington, D.C.

Compare and see reviews for airlines that fly from Knoxville to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
Allegiant AirPriceFrom $44Free CancellationRating
7.3
678 reviews
Search Allegiant Air flights
American AirlinesPriceFrom $186Free CancellationRating
7.1
11,924 reviews
Search American Airlines flights
United AirlinesPriceFrom $194Free CancellationRating
7.4
10,112 reviews
Search United Airlines flights
SouthwestPriceFrom $195Free CancellationRating
8.0
4,218 reviews
Search Southwest flights
DeltaPriceFrom $236Free CancellationRating
7.8
8,503 reviews
Search Delta flights

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

    United Airlines flies from Knoxville to Washington, D.C. around 25 times per week, with 10,112 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Knoxville to Washington, D.C. in the last 72 hours was $194 (round-trip), much lower than the average airfare cost of $327 for United Airlines flights on this route.

  • American Airlines Flights From Knoxville to Washington, D.C.

    The best American Airlines deal for Knoxville to Washington, D.C. flight tickets found on momondo in the last 72 hours was $186, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at $300 round-trip. American Airlines operates 16 flights out of Knoxville into Washington, D.C. in an average week, so prices vary by time and availability. 11,924 American Airlines reviews by users on momondo have scored the airline at 7.1/10.

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
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Silver Spring
Towson
Colonial Beach
Springfield
Fairfax
Tysons
Edgewood
Glen Burnie
College Park

Why use momondo?

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

It is quick and easy to find Knoxville to Washington, D.C. 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 Washington, D.C. that suits you.

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

Yes. momondo allows you to filter the results for Knoxville to Washington, D.C. flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from Knoxville.

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

Price alerts on flights to Washington, D.C. from Knoxville are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Washington, D.C. trip

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport