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Cheap flights from Knoxville to Washington, D.C. from $53

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 11/3. 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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Cheap round-trip flights

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Allegiant Air Logo
11:00 am - 12:44 pmTYS-IAD
1h 44mnonstop
Allegiant Air Logo
8:57 pm - 3:22 pmIAD-TYS
18h 25m1 stop
$148Allegiant Air
Find Deal
Mon, Oct 27 - Fri, Oct 31
Allegiant Air Logo
6:12 pm - 7:56 pmTYS-IAD
1h 44mnonstop
Allegiant Air Logo
11:14 am - 4:32 pmIAD-TYS
5h 18m1 stop
$157Allegiant Air
Find Deal
Fri, Nov 7 - Mon, Nov 10
Multiple Airlines Logo
6:13 pm - 7:51 pmTYS-IAD
25h 38m1 stop
Multiple Airlines Logo
9:16 pm - 10:56 pmIAD-TYS
1h 40mnonstop
$160Multiple Airlines
Find Deal
Wed, Nov 12 - Fri, Nov 14
Multiple Airlines Logo
6:30 am - 12:11 amTYS-IAD
17h 41m2 stops
Multiple Airlines Logo
8:46 pm - 10:26 pmIAD-TYS
1h 40mnonstop
$169Multiple Airlines
Find Deal
Thu, Nov 6 - Fri, Nov 7
Multiple Airlines Logo
6:30 am - 12:11 amTYS-IAD
17h 41m2 stops
Multiple Airlines Logo
4:56 pm - 6:36 pmIAD-TYS
1h 40mnonstop
$174Multiple Airlines
Find Deal
Thu, Nov 13 - Mon, Nov 17
United Airlines Logo
5:45 am - 7:28 amTYS-IAD
1h 43mnonstop
United Airlines Logo
10:15 pm - 11:59 pmIAD-TYS
1h 44mnonstop
$189United Airlines
Find Deal
Sat, Nov 8 - Wed, Nov 12
Delta Logo
3:53 pm - 9:32 pmTYS-IAD
5h 39m1 stop
Delta Logo
6:00 am - 9:37 amIAD-TYS
3h 37m1 stop
$209Delta
Find Deal
Thu, Nov 13 - Sun, Nov 16
United Airlines Logo
9:55 am - 11:39 amTYS-IAD
1h 44mnonstop
United Airlines Logo
10:15 pm - 11:59 pmIAD-TYS
1h 44mnonstop
$224United Airlines
Find Deal
Thu, Oct 23 - Sun, Oct 26
Delta Logo
7:59 pm - 12:13 amTYS-IAD
4h 14m1 stop
Delta Logo
5:00 pm - 9:32 pmIAD-TYS
4h 32m1 stop
$234Delta
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Fri, Dec 12 - Mon, Jan 5
American Airlines Logo
5:00 am - 8:49 amTYS-IAD
3h 49m1 stop
American Airlines Logo
8:09 am - 1:36 pmIAD-TYS
5h 27m1 stop
$269American Airlines
Find Deal
Sat, Oct 25 - Wed, Oct 29

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
Oct 27
TYS11:00 amKnoxville McGhee Tyson
1h 44m
IAD12:44 pmWashington, D.C. Dulles Intl
Oct 31
IAD8:57 pmWashington, D.C. Dulles Intl
18h 25m
1 stop
TYS3:22 pmKnoxville McGhee Tyson
$148
Find similar
Allegiant Air
Nov 7
TYS6:12 pmKnoxville McGhee Tyson
1h 44m
IAD7:56 pmWashington, D.C. Dulles Intl
Nov 10
IAD11:14 amWashington, D.C. Dulles Intl
5h 18m
1 stop
TYS4:32 pmKnoxville McGhee Tyson
$157
Find similar
Allegiant Air
Oct 31
TYS6:23 pmKnoxville McGhee Tyson
1h 44m
IAD8:07 pmWashington, D.C. Dulles Intl
Nov 2
IAD11:08 amWashington, D.C. Dulles Intl
21h 17m
1 stop
TYS8:25 amKnoxville McGhee Tyson
$177
Find similar

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

Our best United Airlines deals on Knoxville to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
Nov 8
TYS5:45 amKnoxville McGhee Tyson
1h 43m
IAD7:28 amWashington, D.C. Dulles Intl
Nov 12
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
TYS11:59 pmKnoxville McGhee Tyson
$189
Find similar
United Airlines
Oct 23
TYS9:55 amKnoxville McGhee Tyson
1h 44m
IAD11:39 amWashington, D.C. Dulles Intl
Oct 26
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
TYS11:59 pmKnoxville McGhee Tyson
$224
Find similar
United Airlines
Nov 13
TYS9:50 amKnoxville McGhee Tyson
1h 43m
IAD11:33 amWashington, D.C. Dulles Intl
Nov 17
IAD9:00 amWashington, D.C. Dulles Intl
1h 48m
TYS10:48 amKnoxville McGhee Tyson
$249
Find similar

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 October 13, 2025.
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

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Mon 10/27

11:00 am-12:44 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Fri 10/31

8:57 pm-3:22 pm

1 stop18h 25m

$148

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Fri 11/7

6:12 pm-7:56 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Mon 11/10

11:14 am-4:32 pm

1 stop5h 18m

$157

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Wed 11/12

6:13 pm-7:51 pm

1 stop25h 38m

Washington, D.C. Dulles Intl

Fri 11/14

9:16 pm-10:56 pm

Nonstop1h 40m

$160

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 11/6

6:30 am-12:11 am

2 stops17h 41m

Washington, D.C. Dulles Intl

Fri 11/7

8:46 pm-10:26 pm

Nonstop1h 40m

$169

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 11/13

6:30 am-12:11 am

2 stops17h 41m

Washington, D.C. Dulles Intl

Mon 11/17

4:56 pm-6:36 pm

Nonstop1h 40m

$174

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sat 11/8

5:45 am-7:28 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 11/12

10:15 pm-11:59 pm

Nonstop1h 44m

$189

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 11/13

3:53 pm-9:32 pm

1 stop5h 39m

Washington, D.C. Dulles Intl

Sun 11/16

6:00 am-9:37 am

1 stop3h 37m

$209

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Thu 10/23

9:55 am-11:39 am

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sun 10/26

10:15 pm-11:59 pm

Nonstop1h 44m

$224

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Fri 12/12

7:59 pm-12:13 am

1 stop4h 14m

Washington, D.C. Dulles Intl

Mon 1/5

5:00 pm-9:32 pm

1 stop4h 32m

$234

KnoxvilleWashington, D.C.

TYS - IAD

TYSIAD

Knoxville McGhee Tyson

Sat 10/25

5:00 am-8:49 am

1 stop3h 49m

Washington, D.C. Dulles Intl

Wed 10/29

8:09 am-1:36 pm

1 stop5h 27m

$269

Flights are sorted by cheapest round-trip flights 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 cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, January 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 $249. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of January, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $254.

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 $722. When flying out on a Monday, 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 $902.

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 morning is the least expensive time of day to depart. momondo users have found prices as low as $486 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $999 on average. Flights to Washington, D.C. Dulles Intl Airport from Knoxville at noon 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

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $313 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from Knoxville for as low as $149 on momondo.

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

There are 4 cabin classes available to choose from on Knoxville McGhee Tyson to Washington, D.C. Dulles Intl 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 October 2025, prices for Knoxville to Washington, D.C. Dulles Intl Airport flights are approximately 46% 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

$158

Fastest flight time

1h 43m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Knoxville in the past 72 hours is $158. The best round-trip flight deal from Knoxville to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $356.
The fastest flight from Knoxville to Washington, D.C. Dulles Intl Airport takes 1h 43m
Direct flights go from Knoxville to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

  • 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 43m.

  • 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 $43Free CancellationRating
7.2
694 reviews
Search Allegiant Air flights
DeltaPriceFrom $132Free CancellationRating
7.9
7,973 reviews
Search Delta flights
United AirlinesPriceFrom $218Free CancellationRating
7.4
8,973 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 $218 round-trip. Over the 18 United Airlines flights for this route in a normal week, average airfare is usually $342 round-trip - but some users have found much cheaper deals with momondo.

  • Allegiant Air Flights From Knoxville to Washington, D.C. Dulles Intl Airport

    Allegiant Air is also a popular choice for this route. Allegiant Air flight deals for Knoxville to Washington, D.C. Dulles Intl Airport start from as low as $43 round-trip, depending on your selected dates, with average Allegiant Air deals seen on momondo around $90. Allegiant Air operates 1 flight to Washington, D.C. Dulles Intl Airport from Knoxville in an average week. Users have rated it 7.2/10 across 694 reviews.

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
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Harpers Ferry
Towson
Rockville
Manassas
Fairfax
Reston
Gaithersburg
Glen Burnie

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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