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Cheap flights from Knoxville to Washington, D.C. from $90

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 9/3. 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

American Airlines Logo
4:41 pm - 6:17 pmTYS-DCA
1h 36mnonstop
American Airlines Logo
7:44 pm - 9:29 pmDCA-TYS
1h 45mnonstop
$184American Airlines
Find Deal
Fri, Oct 31 - Mon, Nov 3
American Airlines Logo
6:06 am - 7:49 amTYS-DCA
1h 43mnonstop
American Airlines Logo
9:06 am - 10:54 amDCA-TYS
1h 48mnonstop
$189American Airlines
Find Deal
Fri, Nov 7 - Sun, Nov 9
American Airlines Logo
6:03 am - 7:45 amTYS-DCA
1h 42mnonstop
American Airlines Logo
8:19 am - 10:13 amDCA-TYS
1h 54mnonstop
$190American Airlines
Find Deal
Fri, Oct 17 - Mon, Oct 20
American Airlines Logo
6:00 am - 7:49 amTYS-DCA
1h 49mnonstop
American Airlines Logo
7:58 pm - 9:41 pmDCA-TYS
1h 43mnonstop
$199American Airlines
Find Deal
Fri, Sep 12 - Mon, Sep 15
Delta Logo
6:08 pm - 11:42 pmTYS-DCA
5h 34m1 stop
Delta Logo
6:00 am - 10:56 amDCA-TYS
4h 56m1 stop
$209Delta
Find Deal
Fri, Sep 19 - Sun, Sep 21
Delta Logo
7:11 pm - 10:42 pmTYS-DCA
3h 31m1 stop
Delta Logo
4:00 pm - 8:02 pmDCA-TYS
4h 02m1 stop
$214Delta
Find Deal
Thu, Sep 11 - Mon, Sep 15
Frontier Logo
8:35 pm - 4:59 pmTYS-DCA
20h 24m1 stop
Frontier Logo
7:00 am - 7:50 pmDCA-TYS
12h 50m1 stop
$281Frontier
Find Deal
Mon, Sep 8 - Thu, Sep 11
Frontier Logo
8:35 pm - 4:59 pmTYS-DCA
20h 24m1 stop
Frontier Logo
7:00 am - 7:50 pmDCA-TYS
12h 50m1 stop
$309Frontier
Find Deal
Mon, Sep 15 - Thu, Sep 18
Logo
7:00 am - 4:59 pmTYS-DCA
9h 59m1 stop
Logo
6:00 pm - 10:21 pmDCA-TYS
28h 21m2 stops
$332
Find Deal
Thu, Sep 18 - Sun, Sep 21
Logo
6:19 pm - 12:10 pmTYS-DCA
41h 51m2 stops
Logo
1:00 pm - 1:43 pmDCA-TYS
24h 43m1 stop
$338
Find Deal
Thu, Sep 18 - Wed, Sep 24

Delta flights from Knoxville to Washington, D.C. Reagan-National Airport

Our best Delta deals on Knoxville to Washington, D.C. Reagan-National Airport flight tickets
Delta
Sep 19
TYS6:08 pmKnoxville McGhee Tyson
5h 34m
1 stop
DCA11:42 pmWashington, D.C. Reagan-National
Sep 21
DCA6:00 amWashington, D.C. Reagan-National
4h 56m
1 stop
TYS10:56 amKnoxville McGhee Tyson
$209
Find similar
Delta
Sep 11
TYS7:11 pmKnoxville McGhee Tyson
3h 31m
1 stop
DCA10:42 pmWashington, D.C. Reagan-National
Sep 15
DCA4:00 pmWashington, D.C. Reagan-National
4h 02m
1 stop
TYS8:02 pmKnoxville McGhee Tyson
$214
Find similar
Delta
Sep 3
TYS6:14 pmKnoxville McGhee Tyson
3h 34m
1 stop
DCA9:48 pmWashington, D.C. Reagan-National
Sep 9
DCA1:40 pmWashington, D.C. Reagan-National
3h 39m
1 stop
TYS5:19 pmKnoxville McGhee Tyson
$218
Find similar

American Airlines flights from Knoxville to Washington, D.C. Reagan-National Airport

Our best American Airlines deals on Knoxville to Washington, D.C. Reagan-National Airport flight tickets
American Airlines
Oct 31
TYS4:41 pmKnoxville McGhee Tyson
1h 36m
DCA6:17 pmWashington, D.C. Reagan-National
Nov 3
DCA7:44 pmWashington, D.C. Reagan-National
1h 45m
TYS9:29 pmKnoxville McGhee Tyson
$184
Find similar
American Airlines
Nov 7
TYS6:06 amKnoxville McGhee Tyson
1h 43m
DCA7:49 amWashington, D.C. Reagan-National
Nov 9
DCA9:06 amWashington, D.C. Reagan-National
1h 48m
TYS10:54 amKnoxville McGhee Tyson
$189
Find similar
American Airlines
Oct 17
TYS6:03 amKnoxville McGhee Tyson
1h 42m
DCA7:45 amWashington, D.C. Reagan-National
Oct 20
DCA8:19 amWashington, D.C. Reagan-National
1h 54m
TYS10:13 amKnoxville McGhee Tyson
$190
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Washington, D.C. Reagan-National 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 28, 2025.
Use the filters below to find and compare flights from Knoxville to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Fri 10/31

4:41 pm-6:17 pm

Nonstop1h 36m

Washington, D.C. Reagan-National

Mon 11/3

7:44 pm-9:29 pm

Nonstop1h 45m

$184

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Fri 11/7

6:06 am-7:49 am

Nonstop1h 43m

Washington, D.C. Reagan-National

Sun 11/9

9:06 am-10:54 am

Nonstop1h 48m

$189

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Fri 10/17

6:03 am-7:45 am

Nonstop1h 42m

Washington, D.C. Reagan-National

Mon 10/20

8:19 am-10:13 am

Nonstop1h 54m

$190

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Fri 9/12

6:00 am-7:49 am

Nonstop1h 49m

Washington, D.C. Reagan-National

Mon 9/15

7:58 pm-9:41 pm

Nonstop1h 43m

$199

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Fri 9/19

6:08 pm-11:42 pm

1 stop5h 34m

Washington, D.C. Reagan-National

Sun 9/21

6:00 am-10:56 am

1 stop4h 56m

$209

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 9/11

7:11 pm-10:42 pm

1 stop3h 31m

Washington, D.C. Reagan-National

Mon 9/15

4:00 pm-8:02 pm

1 stop4h 02m

$214

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Mon 9/8

8:35 pm-4:59 pm

1 stop20h 24m

Washington, D.C. Reagan-National

Thu 9/11

7:00 am-7:50 pm

1 stop12h 50m

$281

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Mon 9/15

8:35 pm-4:59 pm

1 stop20h 24m

Washington, D.C. Reagan-National

Thu 9/18

7:00 am-7:50 pm

1 stop12h 50m

$309

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 9/18

7:00 am-4:59 pm

1 stop9h 59m

Washington, D.C. Reagan-National

Sun 9/21

6:00 pm-10:21 pm

2 stops28h 21m

$332

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 9/18

6:19 pm-12:10 pm

2 stops41h 51m

Washington, D.C. Reagan-National

Wed 9/24

1:00 pm-1:43 pm

1 stop24h 43m

$338

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. Reagan-National 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 cheapest month to fly to Washington, D.C. Reagan-National Airport?

The month of September is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Knoxville, with most prices found around $239. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of September, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $239.

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

The cheapest day to depart from Knoxville to Washington, D.C. Reagan-National Airport is on a Wednesday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Wednesday will often find tickets for as low as $307. Flights from Knoxville to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $471. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our data shows that the cheapest Knoxville to Washington, D.C. Reagan-National Airport flights are usually those with departure times in the afternoon. Our users have found flights to Washington, D.C. Reagan-National Airport in the afternoon for as low as $312. In contrast, the most expensive time of day to depart to Washington, D.C. Reagan-National Airport is in the morning when prices are around $351.

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

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

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

You are more likely to see cheaper flights to Washington, D.C. Reagan-National Airport from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Reagan-National Airport for around $303 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Reagan-National Airport from Knoxville for as low as $244 on momondo.

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

There are 3 cabin classes available to choose from on Knoxville McGhee Tyson to Washington, D.C. Reagan-National 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. Reagan-National Airport flight prices changed over time?

As of August 2025, prices for Knoxville to Washington, D.C. Reagan-National Airport flights are approximately 14% more expensive when compared to flights at the same time last year.

When to book flights from Knoxville to Washington, D.C. Reagan-National Airport

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

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

Best Price Found

$180

Fastest flight time

1h 36m

Direct flights

Every day
The best one-way flight to Washington, D.C. Reagan-National Airport from Knoxville in the past 72 hours is $180. The best round-trip flight deal from Knoxville to Washington, D.C. Reagan-National Airport found on momondo in the last 72 hours is $236.
The fastest flight from Knoxville to Washington, D.C. Reagan-National Airport takes 1h 36m
Direct flights go from Knoxville to Washington, D.C. Reagan-National Airport every day.
Search flight deals

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

    Washington, D.C. Reagan-National is 426.9 mi away from Knoxville McGhee Tyson. Flights usually cover this in 1h 36m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Knoxville McGhee Tyson Airport to Washington, D.C. Reagan-National Airport are updated daily.

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

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

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

    The travel and health documents you'll need for your trip to Washington, D.C. Reagan-National Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. It is always advisable to seek 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. Reagan-National Airport?

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

Best airlines flying from Knoxville to Washington, D.C. Reagan-National Airport

Compare and see reviews for airlines that fly from Knoxville to Washington, D.C. Reagan-National Airport with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $189Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

  • American Airlines Flights From Knoxville to Washington, D.C. Reagan-National Airport

    American Airlines flight deals from Knoxville to Washington, D.C. Reagan-National Airport start from $189 round-trip. Over the 15 American Airlines flights for this route in a normal week, average airfare is usually $303 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
Gettysburg
Arlington
National Harbor
Woodbridge
Waldorf
Tysons
Laurel
Silver Spring
Colonial Beach
Fredericksburg
Towson
Manassas
Rockville
Gaithersburg
Reston
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.?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from Knoxville.

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

Yes. All flights to Washington, D.C. from Knoxville on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for Knoxville to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Knoxville to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

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