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Cheap flights from Knoxville to Washington, D.C. from $105

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 3/31. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
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
American Airlines Logo
12:01 pm - 1:44 pm
TYS
-
DCA
1h 43mnonstop
American Airlines Logo
7:59 pm - 9:50 pm
DCA
-
TYS
1h 51mnonstop
$183American Airlines
Wed, Apr 8 - Sat, Apr 11
American Airlines Logo
6:05 am - 7:47 am
TYS
-
DCA
1h 42mnonstop
American Airlines Logo
9:18 am - 11:11 am
DCA
-
TYS
1h 53mnonstop
$186American Airlines
Tue, Mar 31 - Sat, Apr 4
American Airlines Logo
6:05 am - 7:47 am
TYS
-
DCA
1h 42mnonstop
American Airlines Logo
7:49 pm - 9:38 pm
DCA
-
TYS
1h 49mnonstop
$188American Airlines
Thu, Feb 26 - Sun, Mar 1
American Airlines Logo
6:05 am - 7:47 am
TYS
-
DCA
1h 42mnonstop
American Airlines Logo
9:05 am - 10:58 am
DCA
-
TYS
1h 53mnonstop
$189American Airlines
Fri, Feb 27 - Sun, Mar 1
Delta Logo
5:57 pm - 9:45 pm
TYS
-
DCA
3h 48m
1 stop
Delta Logo
7:59 am - 2:33 pm
DCA
-
TYS
6h 34m
1 stop
$196Delta
Fri, May 8 - Tue, May 12
American Airlines Logo
6:05 am - 7:47 am
TYS
-
DCA
1h 42mnonstop
American Airlines Logo
7:49 pm - 9:38 pm
DCA
-
TYS
1h 49mnonstop
$204American Airlines
Fri, Feb 20 - Sun, Feb 22
Southwest Logo
6:20 pm - 11:00 pm
TYS
-
DCA
4h 40m
1 stop
Southwest Logo
6:10 am - 1:40 pm
DCA
-
TYS
7h 30m
1 stop
$206Southwest
Tue, Mar 31 - Wed, Apr 1
Delta Logo
7:32 pm - 11:45 pm
TYS
-
DCA
4h 13m
1 stop
Delta Logo
6:00 am - 9:27 am
DCA
-
TYS
3h 27m
1 stop
$209Delta
Fri, May 29 - Sun, May 31

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

Our best Southwest deals on Knoxville to Washington, D.C. Reagan-National Airport flight tickets
Southwest
Mar 31
TYS6:20 pmKnoxville McGhee Tyson
4h 40m
1 stop
DCA11:00 pmWashington, D.C. Reagan-National
Apr 1
DCA6:10 amWashington, D.C. Reagan-National
7h 30m
1 stop
TYS1:40 pmKnoxville McGhee Tyson
$206
Southwest
Mar 31
TYS2:25 pmKnoxville McGhee Tyson
6h 30m
1 stop
DCA8:55 pmWashington, D.C. Reagan-National
Apr 1
DCA12:00 pmWashington, D.C. Reagan-National
8h 05m
2 stops
TYS8:05 pmKnoxville McGhee Tyson
$211
Southwest
May 2
TYS6:40 amKnoxville McGhee Tyson
5h 35m
1 stop
DCA12:15 pmWashington, D.C. Reagan-National
May 5
DCA12:00 pmWashington, D.C. Reagan-National
7h 40m
2 stops
TYS7:40 pmKnoxville McGhee Tyson
$214

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

Our best Frontier deals on Knoxville to Washington, D.C. Reagan-National Airport flight tickets
Frontier
Feb 16
TYS8:13 pmKnoxville McGhee Tyson
17h 02m
1 stop
DCA1:15 pmWashington, D.C. Reagan-National
Feb 19
DCA2:00 pmWashington, D.C. Reagan-National
29h 27m
1 stop
TYS7:27 pmKnoxville McGhee Tyson
$250
Frontier
Feb 13
TYS8:12 pmKnoxville McGhee Tyson
16h 48m
1 stop
DCA1:00 pmWashington, D.C. Reagan-National
Feb 16
DCA8:00 amWashington, D.C. Reagan-National
11h 18m
1 stop
TYS7:18 pmKnoxville McGhee Tyson
$266
Frontier
Feb 16
TYS8:13 pmKnoxville McGhee Tyson
17h 02m
1 stop
DCA1:15 pmWashington, D.C. Reagan-National
Feb 20
DCA8:00 amWashington, D.C. Reagan-National
11h 27m
1 stop
TYS7:27 pmKnoxville McGhee Tyson
$285

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 February 4, 2026.
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

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

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Wed 4/8

12:01 pm-1:44 pm

Nonstop1h 43m

Washington, D.C. Reagan-National

Sat 4/11

7:59 pm-9:50 pm

Nonstop1h 51m

$183

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Tue 3/31

6:05 am-7:47 am

Nonstop1h 42m

Washington, D.C. Reagan-National

Sat 4/4

9:18 am-11:11 am

Nonstop1h 53m

$186

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Thu 2/26

6:05 am-7:47 am

Nonstop1h 42m

Washington, D.C. Reagan-National

Sun 3/1

7:49 pm-9:38 pm

Nonstop1h 49m

$188

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Fri 2/27

6:05 am-7:47 am

Nonstop1h 42m

Washington, D.C. Reagan-National

Sun 3/1

9:05 am-10:58 am

Nonstop1h 53m

$189

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Fri 5/8

5:57 pm-9:45 pm

1 stop3h 48m

Washington, D.C. Reagan-National

Tue 5/12

7:59 am-2:33 pm

1 stop6h 34m

$196

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Fri 2/20

6:05 am-7:47 am

Nonstop1h 42m

Washington, D.C. Reagan-National

Sun 2/22

7:49 pm-9:38 pm

Nonstop1h 49m

$204

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Tue 3/31

6:20 pm-11:00 pm

1 stop4h 40m

Washington, D.C. Reagan-National

Wed 4/1

6:10 am-1:40 pm

1 stop7h 30m

$206

KnoxvilleWashington, D.C.

TYS - DCA

TYSDCA

Knoxville McGhee Tyson

Fri 5/29

7:32 pm-11:45 pm

1 stop4h 13m

Washington, D.C. Reagan-National

Sun 5/31

6:00 am-9:27 am

1 stop3h 27m

$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. 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 June 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 Thursday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Thursday will often find tickets for as low as $292. Flights from Knoxville to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $470. 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 evening. Our users have found flights to Washington, D.C. Reagan-National Airport in the evening for as low as $299. In contrast, the most expensive time of day to depart to Washington, D.C. Reagan-National Airport is at noon when prices are around $427.

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 $289 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 $243 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 February 2026, prices for Knoxville to Washington, D.C. Reagan-National Airport flights are approximately 12% 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

$214

Fastest flight time

1h 40m

Direct flights

Every day
The best one-way flight to Washington, D.C. Reagan-National Airport from Knoxville in the past 72 hours is $214. The best round-trip flight deal from Knoxville to Washington, D.C. Reagan-National Airport found on momondo in the last 72 hours is $219.
The fastest flight from Knoxville to Washington, D.C. Reagan-National Airport takes 1h 40m
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 40m, 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
11,216 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 17 American Airlines flights for this route in a normal week, average airfare is usually $290 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
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.?

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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