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Cheap Flights from Knoxville (TYS) to Washington D.C. (IAD)

Compare Knoxville to Washington Dulles flight deals

Find the cheapest month or even day of the year to fly to Washington Dulles

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Flight deals from Knoxville Airport to Washington Dulles Airport

Looking for a cheap last-minute deal or the best return flight from Knoxville Airport to Washington Dulles Airport? If you want to travel next month, return fares start from $114. Find the lowest prices on one-way and return tickets right here.
Washington D.C..$114 per passenger.Departing Fri, 26 Jun, returning Fri, 3 Jul.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Fri, 26 Jun, arriving in Washington Dulles.Inbound direct flight with Allegiant Air departs from Washington Dulles on Fri, 3 Jul, arriving in Knoxville.Price includes taxes and charges.From $114, select.
Washington D.C..$114 per passenger.Departing Sun, 19 Apr, returning Thu, 23 Apr.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Sun, 19 Apr, arriving in Washington Dulles.Inbound direct flight with Allegiant Air departs from Washington Dulles on Thu, 23 Apr, arriving in Knoxville.Price includes taxes and charges.From $114, select.
Washington D.C..$114 per passenger.Departing Mon, 8 Jun, returning Fri, 19 Jun.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Mon, 8 Jun, arriving in Washington Dulles.Inbound direct flight with Allegiant Air departs from Washington Dulles on Fri, 19 Jun, arriving in Knoxville.Price includes taxes and charges.From $114, select.
Washington D.C..$118 per passenger.Departing Thu, 7 May, returning Sun, 17 May.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 7 May, arriving in Washington Dulles.Inbound direct flight with Allegiant Air departs from Washington Dulles on Sun, 17 May, arriving in Knoxville.Price includes taxes and charges.From $118, select.
Washington D.C..$122 per passenger.Departing Sun, 19 Apr, returning Thu, 7 May.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Sun, 19 Apr, arriving in Washington Dulles.Inbound direct flight with Allegiant Air departs from Washington Dulles on Thu, 7 May, arriving in Knoxville.Price includes taxes and charges.From $122, select.
Washington D.C..$143 per passenger.Departing Sun, 29 Mar, returning Sun, 12 Apr.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Sun, 29 Mar, arriving in Washington Dulles.Inbound direct flight with Allegiant Air departs from Washington Dulles on Sun, 12 Apr, arriving in Knoxville.Price includes taxes and charges.From $143, select.
Washington D.C..$179 per passenger.Departing Mon, 25 May, returning Fri, 12 Jun.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Mon, 25 May, arriving in Washington Dulles.Inbound direct flight with Allegiant Air departs from Washington Dulles on Fri, 12 Jun, arriving in Knoxville.Price includes taxes and charges.From $179, select.
Washington D.C..$217 per passenger.Departing Thu, 26 Mar, returning Sun, 29 Mar.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Knoxville on Thu, 26 Mar, arriving in Washington Dulles.Inbound direct flight with Allegiant Air departs from Washington Dulles on Sun, 29 Mar, arriving in Knoxville.Price includes taxes and charges.From $217, select.
Washington D.C..$308 per passenger.Departing Sun, 2 Aug, returning Sat, 31 Oct.Return flight with United.Outbound direct flight with United departs from Knoxville on Sun, 2 Aug, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Sat, 31 Oct, arriving in Knoxville.Price includes taxes and charges.From $308, select.
Washington D.C..$310 per passenger.Departing Thu, 2 Jul, returning Sun, 5 Jul.Return flight with United.Outbound direct flight with United departs from Knoxville on Thu, 2 Jul, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Sun, 5 Jul, arriving in Knoxville.Price includes taxes and charges.From $310, select.
Washington D.C..$310 per passenger.Departing Wed, 9 Sep, returning Mon, 21 Sep.Return flight with United.Outbound direct flight with United departs from Knoxville on Wed, 9 Sep, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Mon, 21 Sep, arriving in Knoxville.Price includes taxes and charges.From $310, select.
Washington D.C..$409 per passenger.Departing Tue, 22 Dec, returning Tue, 29 Dec.Return flight with United.Outbound direct flight with United departs from Knoxville on Tue, 22 Dec, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Tue, 29 Dec, arriving in Knoxville.Price includes taxes and charges.From $409, select.

Find the cheapest month to fly from Knoxville to Washington Dulles

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Knoxville to Washington Dulles flights are currently cheapest in April.
Mar
from $217
Apr
from $114
May
from $118
Jun
from $114
Jul
from $310
Aug
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Sep
from $310
Oct
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Nov
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Dec
from $409
Jan
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Feb
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Direct flights from Knoxville to Washington Dulles

Knoxville to Washington Dulles: Alternative routes

Compare routes from Knoxville to Washington D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Washington Dulles.

Washington Ronald Reagan

5km from central Washington D.C.
Closest
from $336
Search flights

Camp Springs Andrews AFB

17km from central Washington D.C.
Search flights

Washington Dulles

37km from central Washington D.C.
Cheapest
from $114
Search flights

Baltimore Washington International

44km from central Washington D.C.
from $285
Search flights

Manassas

47km from central Washington D.C.
Search flights

Knoxville to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found$114
Cheapest month to flyApril
Average flight time1 hr, 40 mins
Most popular airlineUnited
Average flights per week277

Check out these Washington D.C. hotels

Ready to plan your stay? Other travellers rate these Washington D.C. hotels for cleanliness, service and location.
Swann House
1.61 km from city centre
$620
Per night
The Fairmont Washington DC
1.72 km from city centre
$802
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Riggs Washington DC
0.83 km from city centre
$588
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Swann House
1.61 km from city centre
$620
Per night
The Fairmont Washington DC
1.72 km from city centre
$802
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Riggs Washington DC
0.83 km from city centre
$588
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Finding cheap flights from Knoxville to Washington Dulles: Frequently asked questions

The best price we found for a return flight from Knoxville to Washington Dulles is $114. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 40 minutes is the average flight time from Knoxville to Washington Dulles.
United, Air Canada and CommutAir fly direct from Knoxville to Washington Dulles.
As of March 2026, there are 277 flights per week flying from Knoxville to Washington Dulles.
The cheapest month to fly from Knoxville to Washington Dulles is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Knoxville Airport to Washington Dulles Airport on Sunday, 19 April 2026.
Yes – the average flight time is 1 hour and 40 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Allegiant Air offers the cheapest flight tickets to Washington Dulles.

How to find cheap flights to Washington D.C. (IAD) from Knoxville (TYS) in 2024

Looking for cheap tickets from Knoxville to Washington Dulles? Return tickets start from $114 and one-way flights to Washington Dulles from Knoxville start from $57


Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

  • Simply hit 'search'. From British Airways to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets.
  • Compare flight deals to Washington D.C. from Knoxville from over 1,000 providers. Then choose the cheapest or fastest plane tickets. Flight tickets to Washington D.C. start from $57 one-way.
  • Flex your dates to find the best TYS-IAD ticket prices. If you are flexible when it comes to your travel dates, use Skyscanner's 'Whole month' tool to find the cheapest month, and even day to fly to Washington Dulles from Knoxville.
  • Set up a Price Alert. You can easily track the fare of your cheap flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
  • Fly without stops. Only interested in direct flights between Knoxville and Washington Dulles? Make sure to tick 'Direct flights only' when performing a search. If there are direct flights available on the route, these will appear in the results. Airlines that fly direct include: United
    Air Canada
    CommutAir
    Avianca
    Copa
    Lufthansa
    Mesa Airlines
    Allegiant Air
  • Find the cheapest Business class flights from Knoxville and Washington Dulles. We scour the internet for the best Business, Premium Economy and First Class flight fares to Washington D.C., too. Check the difference in price as you search – you might just chance upon a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
  • Include nearby airports in your search. Widen your search for Knoxville to Washington Dulles flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save next time you travel.
  • Search for cheap flights regardless of where you are. To get the best flight booking experience when out and about, download the app and search for plane tickets between Knoxville and Washington Dulles whenever you want.

Combine your flight to Washington Dulles from Knoxville with hotels and car hire

Once you've secured your cheap flight ticket from Knoxville to Washington Dulles, discover the best prices and exclusive rates for hotels in Washington D.C. or nearby. You can also compare hundreds of car hire companies in one go so that you get the best car hire price for your trip.


Plan the rest of your trip from Knoxville to Washington D.C.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.