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Cheap flights from Knoxville to Washington, D.C. from $29

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 7/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
12:53 pm - 2:26 pm
TYS
-
IAD
1h 33mnonstop
Allegiant Air Logo
3:16 pm - 4:42 pm
IAD
-
TYS
1h 26mnonstop
$88Allegiant Air
Fri, Jul 10 - Mon, Jul 13
Allegiant Air Logo
12:53 pm - 2:26 pm
TYS
-
IAD
1h 33mnonstop
Allegiant Air Logo
3:16 pm - 4:42 pm
IAD
-
TYS
1h 26mnonstop
$92Allegiant Air
Mon, Jul 6 - Fri, Jul 10
Allegiant Air Logo
7:45 am - 9:13 am
TYS
-
IAD
1h 28mnonstop
Allegiant Air Logo
6:01 pm - 7:33 pm
IAD
-
TYS
1h 32mnonstop
$106Allegiant Air
Thu, Nov 12 - Thu, Nov 19
Allegiant Air Logo
7:30 am - 8:58 am
TYS
-
IAD
1h 28mnonstop
Allegiant Air Logo
6:01 pm - 7:33 pm
IAD
-
TYS
1h 32mnonstop
$114Allegiant Air
Sun, Nov 15 - Thu, Nov 19
Multiple Airlines Logo
9:11 pm - 7:38 pm
TYS
-
IAD
22h 27m
1 stop
Multiple Airlines Logo
3:16 pm - 4:42 pm
IAD
-
TYS
1h 26mnonstop
$132Multiple Airlines
Thu, Jul 16 - Mon, Jul 20
Multiple Airlines Logo
7:20 pm - 12:26 pm
TYS
-
IAD
17h 06m
1 stop
Multiple Airlines Logo
3:16 pm - 4:42 pm
IAD
-
TYS
1h 26mnonstop
$134Multiple Airlines
Fri, Jul 31 - Mon, Aug 3
Multiple Airlines Logo
12:53 pm - 2:26 pm
TYS
-
IAD
1h 33mnonstop
Multiple Airlines Logo
12:00 pm - 11:33 pm
IAD
-
TYS
11h 33m
2 stops
$138Multiple Airlines
Fri, Jul 17 - Mon, Jul 20
Multiple Airlines Logo
12:53 pm - 2:26 pm
TYS
-
IAD
1h 33mnonstop
Multiple Airlines Logo
12:00 pm - 11:33 pm
IAD
-
TYS
11h 33m
2 stops
$139Multiple Airlines
Mon, Jul 13 - Mon, Jul 20
Multiple Airlines Logo
12:53 pm - 2:26 pm
TYS
-
IAD
1h 33mnonstop
Multiple Airlines Logo
5:40 pm - 5:59 pm
IAD
-
TYS
24h 19m
1 stop
$140Multiple Airlines
Fri, Jul 17 - Tue, Jul 21
Multiple Airlines Logo
12:53 pm - 2:26 pm
TYS
-
IAD
1h 33mnonstop
Multiple Airlines Logo
5:40 pm - 8:36 am
IAD
-
TYS
14h 56m
1 stop
$141Multiple Airlines
Mon, Aug 3 - Thu, Aug 6

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Allegiant Air flights from Knoxville to Washington, D.C. Dulles Intl Airport

Our best Allegiant Air deals on Knoxville to Washington, D.C. Dulles Intl Airport flight tickets
Allegiant Air
Jun 29
TYS12:49 pmKnoxville McGhee Tyson
1h 27m
IAD2:16 pmWashington, D.C. Dulles Intl
Jul 3
IAD3:16 pmWashington, D.C. Dulles Intl
1h 26m
TYS4:42 pmKnoxville McGhee Tyson
$84
Allegiant Air
Jul 10
TYS12:53 pmKnoxville McGhee Tyson
1h 33m
IAD2:26 pmWashington, D.C. Dulles Intl
Jul 13
IAD3:16 pmWashington, D.C. Dulles Intl
1h 26m
TYS4:42 pmKnoxville McGhee Tyson
$88
Allegiant Air
Jul 6
TYS12:53 pmKnoxville McGhee Tyson
1h 33m
IAD2:26 pmWashington, D.C. Dulles Intl
Jul 10
IAD3:16 pmWashington, D.C. Dulles Intl
1h 26m
TYS4:42 pmKnoxville McGhee Tyson
$92

American Airlines flights from Knoxville to Washington, D.C. Dulles Intl Airport

Our best American Airlines deals on Knoxville to Washington, D.C. Dulles Intl Airport flight tickets
American Airlines
Jul 7
TYS4:07 pmKnoxville McGhee Tyson
5h 58m
1 stop
IAD10:05 pmWashington, D.C. Dulles Intl
Jul 26
IAD5:03 amWashington, D.C. Dulles Intl
5h 35m
1 stop
TYS10:38 amKnoxville McGhee Tyson
$278
American Airlines
Jul 3
TYS8:05 pmKnoxville McGhee Tyson
4h 05m
1 stop
IAD12:10 amWashington, D.C. Dulles Intl
Jul 6
IAD5:03 amWashington, D.C. Dulles Intl
3h 28m
1 stop
TYS8:31 amKnoxville McGhee Tyson
$299
American Airlines
Jul 3
TYS8:05 pmKnoxville McGhee Tyson
4h 05m
1 stop
IAD12:10 amWashington, D.C. Dulles Intl
Jul 6
IAD5:03 amWashington, D.C. Dulles Intl
3h 28m
1 stop
TYS8:31 amKnoxville McGhee Tyson
$328

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Washington, D.C. Dulles Intl 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 June 23, 2026.
Use the filters below to find and compare flights from Knoxville to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Fri 7/10

12:53 pm-2:26 pm

Nonstop1h 33m

Washington, D.C. Dulles Intl

Mon 7/13

3:16 pm-4:42 pm

Nonstop1h 26m

$88

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Mon 7/6

12:53 pm-2:26 pm

Nonstop1h 33m

Washington, D.C. Dulles Intl

Fri 7/10

3:16 pm-4:42 pm

Nonstop1h 26m

$92

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 11/12

7:45 am-9:13 am

Nonstop1h 28m

Washington, D.C. Dulles Intl

Thu 11/19

6:01 pm-7:33 pm

Nonstop1h 32m

$106

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sun 11/15

7:30 am-8:58 am

Nonstop1h 28m

Washington, D.C. Dulles Intl

Thu 11/19

6:01 pm-7:33 pm

Nonstop1h 32m

$114

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 7/16

9:11 pm-7:38 pm

1 stop22h 27m

Washington, D.C. Dulles Intl

Mon 7/20

3:16 pm-4:42 pm

Nonstop1h 26m

$132

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Fri 7/31

7:20 pm-12:26 pm

1 stop17h 06m

Washington, D.C. Dulles Intl

Mon 8/3

3:16 pm-4:42 pm

Nonstop1h 26m

$134

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Fri 7/17

12:53 pm-2:26 pm

Nonstop1h 33m

Washington, D.C. Dulles Intl

Mon 7/20

12:00 pm-11:33 pm

2 stops11h 33m

$138

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Mon 7/13

12:53 pm-2:26 pm

Nonstop1h 33m

Washington, D.C. Dulles Intl

Mon 7/20

12:00 pm-11:33 pm

2 stops11h 33m

$139

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Fri 7/17

12:53 pm-2:26 pm

Nonstop1h 33m

Washington, D.C. Dulles Intl

Tue 7/21

5:40 pm-5:59 pm

1 stop24h 19m

$140

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Mon 8/3

12:53 pm-2:26 pm

Nonstop1h 33m

Washington, D.C. Dulles Intl

Thu 8/6

5:40 pm-8:36 am

1 stop14h 56m

$141

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. Dulles Intl 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 typical price of a round-trip flight between Knoxville and Washington, D.C. Dulles Intl Airport?

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

In general, June is the cheapest month to fly from Knoxville to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $114. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of June, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $130.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Friday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $451. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Washington, D.C. Dulles Intl Airport for around $927.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Knoxville in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $90 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $885 on average. Flights to Washington, D.C. Dulles Intl Airport from Knoxville in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Knoxville McGhee Tyson to Washington, D.C. Dulles Intl flight route?

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

What cabin class options are available on Knoxville to Washington, D.C. Dulles Intl Airport flights?

There are 4 cabin classes available to choose from on Knoxville to Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport flight prices changed over time?

As of June 2026, prices for Knoxville to Washington, D.C. Dulles Intl Airport flights are approximately 84% cheaper when compared to flights at the same time last year.

When to book flights from Knoxville to Washington, D.C. Dulles Intl Airport

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

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

Best Price Found

$145

Fastest flight time

1h 27m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Knoxville in the past 72 hours is $145. The best round-trip flight deal from Knoxville to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $612.
The fastest flight from Knoxville to Washington, D.C. Dulles Intl Airport takes 1h 27m
Direct flights go from Knoxville to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

Frequently asked questions about flying from Knoxville to Washington, D.C. Dulles Intl Airport

  • How far is Knoxville McGhee Tyson to Washington, D.C. Dulles Intl by plane?

    Washington, D.C. Dulles Intl is 410.2 mi away from Knoxville McGhee Tyson. In terms of flight time, this usually takes a little over 1h 27m.

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

    Prices for flights from Knoxville McGhee Tyson Airport to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.

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

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Washington, D.C. Dulles Intl 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. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The required travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Knoxville to Washington, D.C. Dulles Intl Airport?

  • What is the most popular airline from Knoxville to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Knoxville to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Knoxville to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Allegiant AirPriceFrom $44Free CancellationRating
7.3
693 reviews
Search Allegiant Air flights
United AirlinesPriceFrom $189Free CancellationRating
7.4
9,875 reviews
Search United Airlines flights

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

    United Airlines flight deals from Knoxville to Washington, D.C. Dulles Intl Airport start from $189 round-trip. Over the 24 United Airlines flights for this route in a normal week, average airfare is usually $331 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
Arlington
Gettysburg
Winchester
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Colonial Beach
Linthicum Heights
Rockville
Silver Spring
Towson
Manassas
Sterling
Tysons
Springfield
Fairfax

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Washington, D.C.?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Knoxville to Washington, D.C.. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to Washington, D.C. from Knoxville with this policy.

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

Once all potential Knoxville to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Knoxville to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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