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Cheap flights from Knoxville to Washington, D.C. from $48

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 4/9. 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
5:56 pm - 7:40 pm
TYS
-
IAD
1h 44mnonstop
Allegiant Air Logo
8:30 pm - 10:10 pm
IAD
-
TYS
1h 40mnonstop
$73Allegiant Air
Thu, Feb 19 - Sun, Feb 22
Allegiant Air Logo
5:56 pm - 7:40 pm
TYS
-
IAD
1h 44mnonstop
Allegiant Air Logo
9:54 am - 11:34 am
IAD
-
TYS
1h 40mnonstop
$74Allegiant Air
Sun, Feb 22 - Sun, Mar 8
Allegiant Air Logo
5:53 pm - 7:37 pm
TYS
-
IAD
1h 44mnonstop
Allegiant Air Logo
8:27 pm - 10:07 pm
IAD
-
TYS
1h 40mnonstop
$75Allegiant Air
Thu, Feb 26 - Sun, Mar 1
Allegiant Air Logo
7:20 am - 9:04 am
TYS
-
IAD
1h 44mnonstop
Allegiant Air Logo
9:54 am - 11:34 am
IAD
-
TYS
1h 40mnonstop
$78Allegiant Air
Thu, Mar 5 - Sun, Mar 8
Multiple Airlines Logo
5:56 pm - 7:40 pm
TYS
-
IAD
1h 44mnonstop
Multiple Airlines Logo
8:09 am - 9:50 pm
IAD
-
TYS
13h 41m
1 stop
$134Multiple Airlines
Sun, Feb 22 - Sun, Mar 8
American Airlines Logo
6:00 am - 7:42 am
TYS
-
DCA
1h 42mnonstop
American Airlines Logo
7:59 pm - 9:50 pm
DCA
-
TYS
1h 51mnonstop
$173American Airlines
Wed, Apr 8 - Sat, Apr 11
American Airlines Logo
6:00 am - 7:42 am
TYS
-
DCA
1h 42mnonstop
American Airlines Logo
9:15 am - 11:01 am
DCA
-
TYS
1h 46mnonstop
$176American Airlines
Wed, Apr 22 - Sun, Apr 26
Southwest Logo
8:15 am - 10:00 am
TYS
-
BWI
1h 45mnonstop
Southwest Logo
3:35 pm - 8:20 pm
BWI
-
TYS
4h 45m
1 stop
$190Southwest
Wed, May 13 - Wed, Jun 10
Southwest Logo
8:15 am - 10:00 am
TYS
-
BWI
1h 45mnonstop
Southwest Logo
10:10 am - 8:20 pm
BWI
-
TYS
10h 10m
2 stops
$195Southwest
Wed, May 13 - Wed, Jun 10
Delta Logo
5:10 pm - 8:40 pm
TYS
-
DCA
3h 30m
1 stop
Delta Logo
10:10 am - 4:06 pm
DCA
-
TYS
5h 56m
1 stop
$209Delta
Tue, Mar 10 - Tue, Mar 17

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

Our best Allegiant Air deals on Knoxville to Washington, D.C. flight tickets
Allegiant Air
Feb 19
TYS5:56 pmKnoxville McGhee Tyson
1h 44m
IAD7:40 pmWashington, D.C. Dulles Intl
Feb 22
IAD8:30 pmWashington, D.C. Dulles Intl
1h 40m
TYS10:10 pmKnoxville McGhee Tyson
$73
Allegiant Air
Feb 22
TYS5:56 pmKnoxville McGhee Tyson
1h 44m
IAD7:40 pmWashington, D.C. Dulles Intl
Mar 8
IAD9:54 amWashington, D.C. Dulles Intl
1h 40m
TYS11:34 amKnoxville McGhee Tyson
$74
Allegiant Air
Feb 26
TYS5:53 pmKnoxville McGhee Tyson
1h 44m
IAD7:37 pmWashington, D.C. Dulles Intl
Mar 1
IAD8:27 pmWashington, D.C. Dulles Intl
1h 40m
TYS10:07 pmKnoxville McGhee Tyson
$75

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

Our best United Airlines deals on Knoxville to Washington, D.C. flight tickets
United Airlines
Apr 16
TYS9:40 amKnoxville McGhee Tyson
1h 45m
IAD11:25 amWashington, D.C. Dulles Intl
Apr 18
IAD9:00 amWashington, D.C. Dulles Intl
1h 50m
TYS10:50 amKnoxville McGhee Tyson
$183
United Airlines
Apr 18
TYS9:40 amKnoxville McGhee Tyson
1h 45m
IAD11:25 amWashington, D.C. Dulles Intl
Apr 19
IAD9:00 amWashington, D.C. Dulles Intl
1h 50m
TYS10:50 amKnoxville McGhee Tyson
$186
United Airlines
Feb 28
TYS9:40 amKnoxville McGhee Tyson
1h 46m
IAD11:26 amWashington, D.C. Dulles Intl
Mar 1
IAD9:00 amWashington, D.C. Dulles Intl
1h 49m
TYS10:49 amKnoxville McGhee Tyson
$189

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 February 3, 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

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 2/19

5:56 pm-7:40 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sun 2/22

8:30 pm-10:10 pm

Nonstop1h 40m

$73

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sun 2/22

5:56 pm-7:40 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sun 3/8

9:54 am-11:34 am

Nonstop1h 40m

$74

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 2/26

5:53 pm-7:37 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sun 3/1

8:27 pm-10:07 pm

Nonstop1h 40m

$75

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 3/5

7:20 am-9:04 am

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sun 3/8

9:54 am-11:34 am

Nonstop1h 40m

$78

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sun 2/22

5:56 pm-7:40 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sun 3/8

8:09 am-9:50 pm

1 stop13h 41m

$134

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Wed 4/8

6:00 am-7:42 am

Nonstop1h 42m

Washington, D.C. Reagan-National

Sat 4/11

7:59 pm-9:50 pm

Nonstop1h 51m

$173

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Wed 4/22

6:00 am-7:42 am

Nonstop1h 42m

Washington, D.C. Reagan-National

Sun 4/26

9:15 am-11:01 am

Nonstop1h 46m

$176

KnoxvilleBaltimore

TYS - BWI

TYSBWI

Knoxville McGhee Tyson

Wed 5/13

8:15 am-10:00 am

Nonstop1h 45m

Baltimore/Washington

Wed 6/10

3:35 pm-8:20 pm

1 stop4h 45m

$190

KnoxvilleBaltimore

TYS - BWI

TYSBWI

Knoxville McGhee Tyson

Wed 5/13

8:15 am-10:00 am

Nonstop1h 45m

Baltimore/Washington

Wed 6/10

10:10 am-8:20 pm

2 stops10h 10m

$195

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Tue 3/10

5:10 pm-8:40 pm

1 stop3h 30m

Washington, D.C. Reagan-National

Tue 3/17

10:10 am-4:06 pm

1 stop5h 56m

$209

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 cheapest month to fly to Washington, D.C.?

The month of November is, on average, the cheapest month to fly to Washington, D.C. from Knoxville, with most prices found around $195. If you’re not able to fly to Washington, D.C. in November, then July is your next best option. Flight prices from Knoxville to Washington, D.C. during July average around $214.

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 $387. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Washington, D.C. for around $702.

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 $300. 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 $852. 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 $300 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 February 2026, prices for Knoxville to Washington, D.C. flights are approximately 44% 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

$133

Fastest flight time

1h 23m

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 $133. The best round-trip flight deal from Knoxville to Washington, D.C. found on momondo in the last 72 hours is $219.
The fastest flight from Knoxville to Washington, D.C. takes 1h 23m
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

  • 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 23m.

  • 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
708 reviews
Search Allegiant Air flights
American AirlinesPriceFrom $189Free CancellationRating
7.2
11,212 reviews
Search American Airlines flights
United AirlinesPriceFrom $194Free CancellationRating
7.4
9,231 reviews
Search United Airlines flights
DeltaPriceFrom $228Free CancellationRating
7.9
8,132 reviews
Search Delta flights

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

    United Airlines flies from Knoxville to Washington, D.C. around 18 times per week, with 9,231 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 $330 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 $293 round-trip. American Airlines operates 17 flights out of Knoxville into Washington, D.C. in an average week, so prices vary by time and availability. 11,212 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
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Fairfax
Linthicum Heights
Bethesda
Glen Burnie

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