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Cheap flights from Knoxville to Washington, D.C. from $110

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 10/17. 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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Cheap round-trip flights

American Airlines Logo
6:03 am - 7:45 amTYS-DCA
1h 42mnonstop
American Airlines Logo
8:19 am - 10:13 amDCA-TYS
1h 54mnonstop
$189American Airlines
Find Deal
Fri, Oct 24 - Mon, Oct 27
American Airlines Logo
6:00 am - 7:49 amTYS-DCA
1h 49mnonstop
American Airlines Logo
8:19 am - 10:13 amDCA-TYS
1h 54mnonstop
$194American Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6
American Airlines Logo
5:20 pm - 6:59 pmTYS-DCA
1h 39mnonstop
American Airlines Logo
1:55 pm - 3:41 pmDCA-TYS
1h 46mnonstop
$199American Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
Delta Logo
3:48 pm - 7:33 pmTYS-DCA
3h 45m1 stop
Delta Logo
7:59 am - 2:43 pmDCA-TYS
6h 44m1 stop
$209Delta
Find Deal
Thu, Oct 9 - Mon, Oct 13
Delta Logo
12:25 pm - 6:59 pmTYS-DCA
6h 34m1 stop
Delta Logo
6:20 pm - 11:44 pmDCA-TYS
5h 24m1 stop
$219Delta
Find Deal
Tue, Sep 30 - Sat, Oct 4
American Airlines Logo
4:41 pm - 6:17 pmTYS-DCA
1h 36mnonstop
American Airlines Logo
6:59 am - 12:31 pmDCA-TYS
5h 32m1 stop
$220American Airlines
Find Deal
Thu, Oct 30 - Sat, Nov 1
American Airlines Logo
6:25 am - 8:14 amTYS-DCA
1h 49mnonstop
American Airlines Logo
8:30 am - 10:37 amDCA-TYS
2h 07mnonstop
$224American Airlines
Find Deal
Sat, Sep 27 - Mon, Sep 29
American Airlines Logo
7:43 pm - 11:59 pmTYS-DCA
4h 16m1 stop
American Airlines Logo
8:19 am - 10:13 amDCA-TYS
1h 54mnonstop
$229American Airlines
Find Deal
Fri, Oct 24 - Mon, Oct 27
Frontier Logo
7:17 pm - 12:04 pmTYS-DCA
16h 47m1 stop
Frontier Logo
8:15 am - 6:22 pmDCA-TYS
10h 07m1 stop
$240Frontier
Find Deal
Thu, Nov 13 - Sun, Nov 16
Multiple Airlines Logo
7:00 am - 4:59 pmTYS-DCA
9h 59m1 stop
Multiple Airlines Logo
8:15 am - 12:57 pmDCA-TYS
28h 42m2 stops
$365Multiple Airlines
Find Deal
Sun, Nov 16 - Tue, Nov 18

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 24
TYS6:03 amKnoxville McGhee Tyson
1h 42m
DCA7:45 amWashington, D.C. Reagan-National
Oct 27
DCA8:19 amWashington, D.C. Reagan-National
1h 54m
TYS10:13 amKnoxville McGhee Tyson
$189
Find similar
American Airlines
Oct 2
TYS6:00 amKnoxville McGhee Tyson
1h 49m
DCA7:49 amWashington, D.C. Reagan-National
Oct 6
DCA8:19 amWashington, D.C. Reagan-National
1h 54m
TYS10:13 amKnoxville McGhee Tyson
$194
Find similar
American Airlines
Sep 30
TYS5:20 pmKnoxville McGhee Tyson
1h 39m
DCA6:59 pmWashington, D.C. Reagan-National
Oct 4
DCA1:55 pmWashington, D.C. Reagan-National
1h 46m
TYS3:41 pmKnoxville McGhee Tyson
$199
Find similar

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
Oct 9
TYS3:48 pmKnoxville McGhee Tyson
3h 45m
1 stop
DCA7:33 pmWashington, D.C. Reagan-National
Oct 13
DCA7:59 amWashington, D.C. Reagan-National
6h 44m
1 stop
TYS2:43 pmKnoxville McGhee Tyson
$209
Find similar
Delta
Sep 30
TYS12:25 pmKnoxville McGhee Tyson
6h 34m
1 stop
DCA6:59 pmWashington, D.C. Reagan-National
Oct 4
DCA6:20 pmWashington, D.C. Reagan-National
5h 24m
1 stop
TYS11:44 pmKnoxville McGhee Tyson
$219
Find similar
Delta
Nov 18
TYS5:25 amKnoxville McGhee Tyson
3h 45m
1 stop
DCA9:10 amWashington, D.C. Reagan-National
Nov 18
DCA1:44 pmWashington, D.C. Reagan-National
5h 16m
1 stop
TYS7:00 pmKnoxville McGhee Tyson
$251
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 September 17, 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 10/24

6:03 am-7:45 am

Nonstop1h 42m

Washington, D.C. Reagan-National

Mon 10/27

8:19 am-10:13 am

Nonstop1h 54m

$189

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 10/2

6:00 am-7:49 am

Nonstop1h 49m

Washington, D.C. Reagan-National

Mon 10/6

8:19 am-10:13 am

Nonstop1h 54m

$194

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Tue 9/30

5:20 pm-6:59 pm

Nonstop1h 39m

Washington, D.C. Reagan-National

Sat 10/4

1:55 pm-3:41 pm

Nonstop1h 46m

$199

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 10/9

3:48 pm-7:33 pm

1 stop3h 45m

Washington, D.C. Reagan-National

Mon 10/13

7:59 am-2:43 pm

1 stop6h 44m

$209

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Tue 9/30

12:25 pm-6:59 pm

1 stop6h 34m

Washington, D.C. Reagan-National

Sat 10/4

6:20 pm-11:44 pm

1 stop5h 24m

$219

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 10/30

4:41 pm-6:17 pm

Nonstop1h 36m

Washington, D.C. Reagan-National

Sat 11/1

6:59 am-12:31 pm

1 stop5h 32m

$220

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Sat 9/27

6:25 am-8:14 am

Nonstop1h 49m

Washington, D.C. Reagan-National

Mon 9/29

8:30 am-10:37 am

Nonstop2h 07m

$224

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Fri 10/24

7:43 pm-11:59 pm

1 stop4h 16m

Washington, D.C. Reagan-National

Mon 10/27

8:19 am-10:13 am

Nonstop1h 54m

$229

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 11/13

7:17 pm-12:04 pm

1 stop16h 47m

Washington, D.C. Reagan-National

Sun 11/16

8:15 am-6:22 pm

1 stop10h 07m

$240

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Sun 11/16

7:00 am-4:59 pm

1 stop9h 59m

Washington, D.C. Reagan-National

Tue 11/18

8:15 am-12:57 pm

2 stops28h 42m

$365

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 August is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Knoxville, with most prices found around $229. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of August, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $259.

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 $301. Flights from Knoxville to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $480. 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 $301. 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 $348.

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 $296 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 $245 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 September 2025, prices for Knoxville to Washington, D.C. Reagan-National Airport flights are approximately 3% 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

$125

Fastest flight time

1h 31m

Direct flights

Every day
The best one-way flight to Washington, D.C. Reagan-National Airport from Knoxville in the past 72 hours is $125. The best round-trip flight deal from Knoxville to Washington, D.C. Reagan-National Airport found on momondo in the last 72 hours is $251.
The fastest flight from Knoxville to Washington, D.C. Reagan-National Airport takes 1h 31m
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 19 American Airlines flights for this route in a normal week, average airfare is usually $291 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
National Harbor
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Fairfax
Glen Burnie
Gaithersburg
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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