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Cheap flights from Knoxville to Washington, D.C. from $44

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 11/20. 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 Knoxville to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Allegiant Air Logo
5:49 pm - 7:33 pmTYS-IAD
1h 44mnonstop
Allegiant Air Logo
7:57 pm - 9:37 pmIAD-TYS
1h 40mnonstop
$129Allegiant Air
Find Deal
Thu, Nov 20 - Sun, Dec 7
Multiple Airlines Logo
5:49 pm - 7:33 pmTYS-IAD
1h 44mnonstop
Multiple Airlines Logo
9:20 pm - 1:02 pmIAD-TYS
15h 42m1 stop
$132Multiple Airlines
Find Deal
Thu, Nov 20 - Fri, Dec 5
Frontier Logo
4:52 pm - 4:59 pmTYS-DCA
24h 07m1 stop
Frontier Logo
6:00 pm - 3:57 pmDCA-TYS
21h 57m1 stop
$162Frontier
Find Deal
Thu, Dec 11 - Sat, Dec 13
Frontier Logo
4:52 pm - 1:06 pmTYS-DCA
20h 14m1 stop
Frontier Logo
6:00 pm - 3:57 pmDCA-TYS
21h 57m1 stop
$179Frontier
Find Deal
Thu, Dec 4 - Sat, Dec 6
American Airlines Logo
6:00 am - 7:48 amTYS-DCA
1h 48mnonstop
American Airlines Logo
9:03 am - 10:50 amDCA-TYS
1h 47mnonstop
$189American Airlines
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Thu, Dec 4 - Sat, Dec 6
United Airlines Logo
5:45 am - 7:28 amTYS-IAD
1h 43mnonstop
United Airlines Logo
12:55 pm - 2:43 pmIAD-TYS
1h 48mnonstop
$189United Airlines
Find Deal
Tue, Nov 25 - Fri, Nov 28
American Airlines Logo
11:22 am - 12:59 pmTYS-DCA
1h 37mnonstop
American Airlines Logo
7:49 pm - 9:34 pmDCA-TYS
1h 45mnonstop
$194American Airlines
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Thu, Nov 13 - Tue, Nov 18
Delta Logo
3:53 pm - 9:32 pmTYS-IAD
5h 39m1 stop
Delta Logo
9:00 am - 2:50 pmIAD-TYS
5h 50m1 stop
$209Delta
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Wed, Nov 19 - Sat, Dec 6
Delta Logo
5:25 pm - 11:10 pmTYS-DCA
5h 45m1 stop
Delta Logo
6:00 am - 11:10 amDCA-TYS
5h 10m1 stop
$209Delta
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Fri, Jan 16 - Tue, Jan 20
United Airlines Logo
9:50 am - 11:33 amTYS-IAD
1h 43mnonstop
United Airlines Logo
10:15 pm - 11:59 pmIAD-TYS
1h 44mnonstop
$219United Airlines
Find Deal
Thu, Nov 13 - Mon, Nov 17

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

Our best United Airlines deals on Knoxville to Washington, D.C. flight tickets
United Airlines
Nov 25
TYS5:45 amKnoxville McGhee Tyson
1h 43m
IAD7:28 amWashington, D.C. Dulles Intl
Nov 28
IAD12:55 pmWashington, D.C. Dulles Intl
1h 48m
TYS2:43 pmKnoxville McGhee Tyson
$189
Find similar
United Airlines
Nov 13
TYS9:50 amKnoxville McGhee Tyson
1h 43m
IAD11:33 amWashington, D.C. Dulles Intl
Nov 17
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
TYS11:59 pmKnoxville McGhee Tyson
$219
Find similar
United Airlines
Nov 26
TYS7:20 pmKnoxville McGhee Tyson
1h 43m
IAD9:03 pmWashington, D.C. Dulles Intl
Dec 3
IAD9:00 amWashington, D.C. Dulles Intl
1h 48m
TYS10:48 amKnoxville McGhee Tyson
$232
Find similar

Allegiant Air flights from Knoxville to Washington, D.C.

Our best Allegiant Air deals on Knoxville to Washington, D.C. flight tickets
Allegiant Air
Nov 20
TYS5:49 pmKnoxville McGhee Tyson
1h 44m
IAD7:33 pmWashington, D.C. Dulles Intl
Dec 7
IAD7:57 pmWashington, D.C. Dulles Intl
1h 40m
TYS9:37 pmKnoxville McGhee Tyson
$129
Find similar
Allegiant Air
Nov 25
TYS12:24 pmKnoxville McGhee Tyson
1h 44m
IAD2:08 pmWashington, D.C. Dulles Intl
Nov 29
IAD3:04 pmWashington, D.C. Dulles Intl
1h 40m
TYS4:44 pmKnoxville McGhee Tyson
$140
Find similar
Allegiant Air
Jan 8
TYS1:39 pmKnoxville McGhee Tyson
1h 44m
IAD3:23 pmWashington, D.C. Dulles Intl
Jan 11
IAD6:37 pmWashington, D.C. Dulles Intl
25h 59m
1 stop
TYS8:36 pmKnoxville McGhee Tyson
$142
Find similar

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 October 30, 2025.
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

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 11/20

5:49 pm-7:33 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sun 12/7

7:57 pm-9:37 pm

Nonstop1h 40m

$129

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 11/20

5:49 pm-7:33 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Fri 12/5

9:20 pm-1:02 pm

1 stop15h 42m

$132

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 12/11

4:52 pm-4:59 pm

1 stop24h 07m

Washington, D.C. Reagan-National

Sat 12/13

6:00 pm-3:57 pm

1 stop21h 57m

$162

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 12/4

4:52 pm-1:06 pm

1 stop20h 14m

Washington, D.C. Reagan-National

Sat 12/6

6:00 pm-3:57 pm

1 stop21h 57m

$179

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 12/4

6:00 am-7:48 am

Nonstop1h 48m

Washington, D.C. Reagan-National

Sat 12/6

9:03 am-10:50 am

Nonstop1h 47m

$189

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Tue 11/25

5:45 am-7:28 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Fri 11/28

12:55 pm-2:43 pm

Nonstop1h 48m

$189

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 11/13

11:22 am-12:59 pm

Nonstop1h 37m

Washington, D.C. Reagan-National

Tue 11/18

7:49 pm-9:34 pm

Nonstop1h 45m

$194

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Wed 11/19

3:53 pm-9:32 pm

1 stop5h 39m

Washington, D.C. Dulles Intl

Sat 12/6

9:00 am-2:50 pm

1 stop5h 50m

$209

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Fri 1/16

5:25 pm-11:10 pm

1 stop5h 45m

Washington, D.C. Reagan-National

Tue 1/20

6:00 am-11:10 am

1 stop5h 10m

$209

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 11/13

9:50 am-11:33 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Mon 11/17

10:15 pm-11:59 pm

Nonstop1h 44m

$219

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.?

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

The month of July is, on average, the cheapest month to fly to Washington, D.C. from Knoxville, with most prices found around $214. If you’re not able to fly to Washington, D.C. in July, then November is your next best option. Flight prices from Knoxville to Washington, D.C. during November average around $244.

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 $400. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Washington, D.C. for around $767.

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 $312. 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 at noon because they tend to be around $994. 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

How far in advance should I book a flight to Washington, D.C.?

You are more likely to see cheaper flights to Washington, D.C. from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $314 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Knoxville for as low as $149 on momondo.

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

There are 4 cabin classes available to choose from on Knoxville McGhee Tyson 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 October 2025, prices for Knoxville to Washington, D.C. flights are approximately 55% 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

$213

Fastest flight time

1h 34m

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 $213. The best round-trip flight deal from Knoxville to Washington, D.C. found on momondo in the last 72 hours is $237.
The fastest flight from Knoxville to Washington, D.C. takes 1h 34m
Direct flights go from Knoxville to Washington, D.C. every day.
There are 2 airports near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Washington, D.C. Dulles Intl (IAD)
Search flight deals

  • 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 37m.

  • 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 $43Free CancellationRating
7.2
694 reviews
Search Allegiant Air flights
DeltaPriceFrom $132Free CancellationRating
7.9
7,998 reviews
Search Delta flights
American AirlinesPriceFrom $189Free CancellationRating
7.2
11,035 reviews
Search American Airlines flights
United AirlinesPriceFrom $196Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights

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

    United Airlines flies from Knoxville to Washington, D.C. around 15 times per week, with 8,998 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 $196 (round-trip), much lower than the average airfare cost of $338 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 $189, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at $301 round-trip. American Airlines operates 8 flights out of Knoxville into Washington, D.C. in an average week, so prices vary by time and availability. 11,035 American Airlines reviews by users on momondo have scored the airline at 7.2/10.

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
Gettysburg
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Gaithersburg
Fairfax
Glen Burnie
Springfield
Linthicum Heights

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