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Cheap flights from Knoxville to Washington, D.C. from $40

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 7/21. 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

Allegiant Air Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
Allegiant Air Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
$80Allegiant Air
Find Deal
vie., ago. 15 - vie., ago. 22
Allegiant Air Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
Allegiant Air Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
$81Allegiant Air
Find Deal
vie., ago. 15 - lun., ago. 25
Allegiant Air Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
Allegiant Air Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
$83Allegiant Air
Find Deal
vie., jul. 18 - lun., jul. 21
 Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
 Logo
8:30 am - 9:10 pmIAD-TYS
12h 40m1 stop
lun., ago. 18 - lun., ago. 25
 Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
 Logo
8:30 am - 9:10 pmIAD-TYS
12h 40m1 stop
vie., ago. 15 - vie., ago. 22
United Airlines Logo
7:35 pm - 9:10 pmTYS-IAD
1h 35mnonstop
United Airlines Logo
8:45 am - 10:27 amIAD-TYS
1h 42mnonstop
$189United Airlines
Find Deal
mié., jul. 30 - mié., ago. 6
United Airlines Logo
9:55 am - 11:35 amTYS-IAD
1h 40mnonstop
United Airlines Logo
10:13 pm - 11:59 pmIAD-TYS
1h 46mnonstop
$194United Airlines
Find Deal
jue., jul. 17 - dom., jul. 27
Delta Logo
6:14 pm - 12:21 amTYS-IAD
6h 07m1 stop
Delta Logo
1:00 pm - 6:22 pmIAD-TYS
5h 22m1 stop
$209Delta
Find Deal
vie., ago. 15 - lun., ago. 25
Delta Logo
5:12 pm - 10:55 pmTYS-IAD
5h 43m1 stop
Delta Logo
6:00 am - 9:50 amIAD-TYS
3h 50m1 stop
$219Delta
Find Deal
mié., jul. 16 - dom., jul. 20
American Airlines Logo
7:52 pm - 11:58 pmTYS-IAD
4h 06m1 stop
American Airlines Logo
6:34 am - 10:30 amIAD-TYS
3h 56m1 stop
$251American Airlines
Find Deal
mar., ago. 5 - sáb., ago. 9

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
Aug 15
TYS12:45 pmKnoxville McGhee Tyson
1h 38m
IAD2:23 pmWashington, D.C. Dulles Intl
Aug 22
IAD3:13 pmWashington, D.C. Dulles Intl
1h 34m
TYS4:47 pmKnoxville McGhee Tyson
Allegiant Air
Aug 15
TYS12:45 pmKnoxville McGhee Tyson
1h 38m
IAD2:23 pmWashington, D.C. Dulles Intl
Aug 25
IAD3:13 pmWashington, D.C. Dulles Intl
1h 34m
TYS4:47 pmKnoxville McGhee Tyson
Allegiant Air
Jul 11
TYS12:45 pmKnoxville McGhee Tyson
1h 38m
IAD2:23 pmWashington, D.C. Dulles Intl
Jul 14
IAD3:13 pmWashington, D.C. Dulles Intl
1h 34m
TYS4:47 pmKnoxville McGhee Tyson

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
Jul 30
TYS7:35 pmKnoxville McGhee Tyson
1h 35m
IAD9:10 pmWashington, D.C. Dulles Intl
Aug 6
IAD8:45 amWashington, D.C. Dulles Intl
1h 42m
TYS10:27 amKnoxville McGhee Tyson
United Airlines
Jul 17
TYS9:55 amKnoxville McGhee Tyson
1h 40m
IAD11:35 amWashington, D.C. Dulles Intl
Jul 27
IAD10:13 pmWashington, D.C. Dulles Intl
1h 46m
TYS11:59 pmKnoxville McGhee Tyson
United Airlines
Jul 30
TYS7:00 amKnoxville McGhee Tyson
4h 55m
1 stop
IAD11:55 amWashington, D.C. Dulles Intl
Aug 6
IAD10:13 pmWashington, D.C. Dulles Intl
1h 46m
TYS11:59 pmKnoxville McGhee Tyson

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 $266.

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

Our data shows that Tuesday 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 $773. 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 $946.

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 $543 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,262 on average. Flights to Washington, D.C. Dulles Intl Airport from Knoxville in the afternoon 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 $330 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 $224 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 July 2025, prices for Knoxville to Washington, D.C. Dulles Intl Airport flights are approximately 25% more expensive 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

$40

Fastest flight time

1h 35m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Knoxville in the past 72 hours is $40. The best round-trip flight deal from Knoxville to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $80.
The fastest flight from Knoxville to Washington, D.C. Dulles Intl Airport takes 1h 35m
Direct flights go from Knoxville to Washington, D.C. Dulles Intl Airport every day.

  • 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 35m.

  • 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
DeltaPriceFrom $200Free CancellationRating
8.0
7,983 reviews
Search Delta flights
United AirlinesPriceFrom $220Free CancellationRating
7.4
8,861 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 $220 round-trip. Over the 25 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.


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

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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mar. 7/8
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