IAD - TYS

$45 Find Cheap Flights from Washington Dulles Airport to Knoxville

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Knoxville departing on 5/30. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to Knoxville

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Knoxville, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Knoxville, as well as popular online travel agencies
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Flights Deals

Cheap Flight Deals from Dulles Intl to Knoxville (IAD-TYS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Knoxville that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Dulles Intl to Knoxville

KAYAK's recommended round-trip deals from the most popular airlines that fly from Dulles Intl to Knoxville.
Discover the best prices for you by selecting your travel dates on KAYAK.
Allegiant Air Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
Allegiant Air Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
$80Allegiant Air
Find Deal
Fri, May 30 - Fri, Jun 6
Allegiant Air Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
Allegiant Air Logo
12:45 pm - 2:23 pmTYS-IAD
1h 38mnonstop
$85Allegiant Air
Find Deal
Mon, Jul 28 - Fri, Aug 1
United Airlines Logo
10:13 pm - 11:59 pmIAD-TYS
1h 46mnonstop
United Airlines Logo
5:45 am - 7:26 amTYS-IAD
1h 41mnonstop
$184United Airlines
Find Deal
Wed, May 28 - Wed, Jun 4
United Airlines Logo
6:55 pm - 8:42 pmIAD-TYS
1h 47mnonstop
United Airlines Logo
5:45 am - 7:26 amTYS-IAD
1h 41mnonstop
$189United Airlines
Find Deal
Sat, May 24 - Thu, May 29
Delta Logo
7:50 pm - 11:46 pmIAD-TYS
3h 56m1 stop
Delta Logo
7:15 pm - 12:07 amTYS-IAD
4h 52m1 stop
$209Delta
Find Deal
Tue, Oct 7 - Wed, Oct 15
Delta Logo
6:00 am - 10:23 amIAD-TYS
4h 23m1 stop
Delta Logo
5:45 am - 9:14 amTYS-IAD
3h 29m1 stop
$230Delta
Find Deal
Sat, May 31 - Wed, Jun 4
 Logo
3:13 pm - 4:47 pmIAD-TYS
1h 34mnonstop
 Logo
3:08 pm - 11:26 amTYS-IAD
20h 18m3 stops
Fri, May 30 - Mon, Jun 2
 Logo
12:49 pm - 11:42 amIAD-TYS
22h 53m1 stop
 Logo
8:30 am - 9:05 pmTYS-IAD
12h 35m1 stop
Thu, May 29 - Sat, May 31
American Airlines Logo
1:08 pm - 7:01 pmIAD-TYS
5h 53m1 stop
American Airlines Logo
8:22 pm - 11:58 pmTYS-IAD
3h 36m1 stop
$251American Airlines
Find Deal
Wed, Jul 2 - Sat, Jul 5
American Airlines Logo
5:02 am - 8:24 amIAD-TYS
3h 22m1 stop
American Airlines Logo
7:54 pm - 12:02 amTYS-IAD
4h 08m1 stop
$255American Airlines
Find Deal
Sat, May 24 - Thu, May 29
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KAYAK's insights & trends for Dulles Intl to Knoxville flights

Get data-powered insights and trends into flights from Dulles Intl to Knoxville to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Knoxville?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Knoxville clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Knoxville on a Monday and more expensive on a Friday. On your return trip to Washington Dulles Airport, you should consider flying back on a Wednesday, and avoid Mondays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Knoxville, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Knoxville is May, where tickets cost $292 (return) on average. On the other hand, the most expensive months are October and November, where the average cost of round-trip tickets is $489 and $489 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Knoxville, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Knoxville, you should book around 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low seasonFebruary
High seasonJune
Cheapest flight$45
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Washington Dulles Airport to Knoxville

When to book flights from Dulles Intl to Knoxville

Are your dates flexible? Find out the best times to travel from Dulles Intl to Knoxville based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to Knoxville flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Knoxville?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Knoxville was $45 for a one-way ticket and $80 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Knoxville?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airlines offer Wi-Fi service onboard planes from Washington Dulles Airport to Knoxville?

    Only American Airlines offers inflight Wi-Fi service on the Washington Dulles Airport to Knoxville flight route.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Knoxville?

    The Embraer ERJ-135 / ERJ-140 / ERJ-145 is the aircraft model that flies most regularly on the Washington Dulles Airport to Knoxville flight route.

  • Which airline alliances offer flights from Washington Dulles Airport to Knoxville?

    Star Alliance is the only airline alliance operating flights between Washington Dulles Airport and Knoxville.

  • On which days can I fly direct from Washington Dulles Airport to Knoxville?

    There are nonstop flights from Washington Dulles Airport to Knoxville on a daily basis.

  • Which is the best airline for flights from Washington, D.C. to Knoxville, United Airlines or Allegiant Air?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Knoxville are United Airlines and Allegiant Air. With an average price for the route of $379 and an overall rating of 7.4, United Airlines is the most popular choice. Allegiant Air is also a great choice for the route, with an average price of $78 and an overall rating of 7.3.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Knoxville?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Knoxville.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Knoxville?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Knoxville from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Knoxville?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Knoxville with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and TYS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Knoxville?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Knoxville from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to Knoxville

  • Looking for a cheap flight? 25% of our users found flights on this route for $50 or less one-way and $194 or less round-trip.

Prefer to fly direct from Washington Dulles Airport to Knoxville?

Find which airlines fly direct from Washington, D.C. Dulles Intl Airport to Knoxville McGhee Tyson Airport, which days they fly and book direct flights.

Direct departures

Washington, D.C. Dulles Intl to Knoxville McGhee Tyson

Monday

Air Canada, Allegiant Air, Avianca, +5 more

Air Canada, Allegiant Air, +6 more

Tuesday

Air Canada, Avianca, Brussels Airlines, +4 more

Air Canada, Avianca, +5 more

Wednesday

Air Canada, Avianca, Brussels Airlines, +4 more

Air Canada, Avianca, +5 more

Thursday

Air Canada, Avianca, Brussels Airlines, +4 more

Air Canada, Avianca, +5 more

Friday

Air Canada, Allegiant Air, Avianca, +5 more

Air Canada, Allegiant Air, +6 more

Saturday

Air Canada, Avianca, Brussels Airlines, +4 more

Air Canada, Avianca, +5 more

Sunday

Air Canada, Avianca, Brussels Airlines, +4 more

Air Canada, Avianca, +5 more

See more direct flights

Direct returns

Knoxville McGhee Tyson to Washington, D.C. Dulles Intl

Monday

Air Canada, Allegiant Air, Avianca, +5 more

Air Canada, Allegiant Air, +6 more

Tuesday

Air Canada, Avianca, Brussels Airlines, +4 more

Air Canada, Avianca, +5 more

Wednesday

Air Canada, Avianca, Brussels Airlines, +4 more

Air Canada, Avianca, +5 more

Thursday

Air Canada, Avianca, Brussels Airlines, +4 more

Air Canada, Avianca, +5 more

Friday

Air Canada, Allegiant Air, Avianca, +5 more

Air Canada, Allegiant Air, +6 more

Saturday

Air Canada, Avianca, Brussels Airlines, +4 more

Air Canada, Avianca, +5 more

Sunday

Air Canada, Avianca, Brussels Airlines, +4 more

Air Canada, Avianca, +5 more

See more direct flights
See more direct flights

Top airlines flying from Dulles Intl to Knoxville

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Knoxville. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to Knoxville? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8696 reviews
7.7Boarding
6.6Food
7.1Entertainment
8.1Crew
7.3Comfort
Airline reviews

A bit rush for transit. Food and entertainment are not available

8.0 ExcellentAnonymous, Apr 2025ORD - SFO
Read more United Airlines reviews

A bit rush for transit. Food and entertainment are not available

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

We boarded but then sat there waiting on some missed connection people to get on so we sat for about 15 minutes for that. Then we sat again because the passenger manifest was wrong and they had to figure it out before we could leave. That took about another 20 minutes or so. The crew was working hard to figure it out so it’s not their fault. It ended up being a system glitch where someone was upgraded to first class while another person was also in the same seat and it just created a mess that took a little while to figure out. They literally went to every person on the plane asking their names to see who was sitting in the wrong seat. I also hate the entertainment that must be watched on your phone or tablet. Just give us setback screens. It’s so much better. Almost every Delta flight has this now and it is so nice to have them. The crew did a great job. I have no complaints from them. They were very hard working, even with the mishap and a disgruntled passenger.

We were delayed in Toronto on the tarmac for THREE hours with no clear indication as to why except that it was not a safety hazard. Pilot did apologize more than once but even he was unable to explain why exactly we were delayed. I overheard the stewards saying that the captain was very frustrated with the situation as well because he was not able to explain why except it had something to do with water supply or system on the aircraft and now we needed to wait for an engineer to approve the aircraft for flight. It was very frustrating and distressing as a passenger and we should have been given complimentary meals at the very least.

Flight was cramped with every seat taken. The food was fine, nothing crazy to write home about. The plane felt dated and needing some TLC, the button for the window shade didn't work and there were no AC outlets to use. When communicating with staff all except one nice lady never seemed happy to help me almost like I was bothering them when asked for things like a glass of water or a snack. The flight was overall fine. It did what was needed which is get me from point A to point B. But it certainly was not special. I don't expect much in economy but I believe economy on a host of other airlines is more memorable and better experience.

The flight was heavily booked so boarding was a lengthy process. The FA’s were rather abrupt during this process but became more gracious as the flight went on. Breakfast (puffed pastry and chewy sausage) was pretty horrible but there was fruit and yogurt which they didn’t mess up. Overall it was fine.

Had a short delay once we boarded the aircraft in Chicago, but it was fixed in no time flat then we were on our way. The pilot was able to make up the time lost and we landed 5 minute later then schedualed . Great service

Liked nothing. As per previous segment it was delay delay delay.

I completely missed my flight because the first leg was longer than planned. I had to sleep overnight in the airport because no accommodation was provided and then sent to Trinidad in the morning with an anticipated 7 hour layover before my flight to Georgetown which was now with Caribbean Airlines. I tried twice with customer service to see if they could put me on an earlier flight which had seats available but was told it wasn’t possible.

Easiest flights I’ve ever taken. Plane was comfortable without overly crowded seating.

Terrible. Still have not received the refund from them. They sent it to some account that I don't even know. Spoke with costumer service and they are unable to help.

I didn’t like it at all. I miss my second flight because of the delay on Allegiant Air now I m stuck in MCO.

Good, but a bit late on take off after loading. Don't like charging for carry ons!

First time flying with them and will definitely fly again in the future. Crew was so nice and friendly, fought was seamless. They are simple planes, no entertainment, but it’s fine for a short flight or if you have personal devices Rates are competitive, and they did so well with keeping the flight on time after a tropical storm, where other airlines had delays and cancellations.

They boarded passengers that sat in the back of the plane first, making boarding very efficient.

I didn't even take this flight. My plans changed and I couldn't get ahold of customer service and the website kept breaking down during the attempt to change the flight. I wound up taking another airline entirely and eating the cost.

The worst flying experience ever 3 delays. No accommodations. Had to deboard the plane after being delayed.

Posted a 20minute delay but didn’t delay at all. Caused boarding issues and confusion. Also, didn’t release baggage. Took over an hour and 20 minutes to get luggage.

Flight was good, boarding was a breeze, flight attendants were friendly and professional. There was a medical issue with another passenger and the crew handled it in a calm and professional way.

Everything you need to know for your flight from Dulles Intl to Knoxville

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