TYS - IAD

$34 Find Cheap Flights from Knoxville to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Knoxville to Dulles Intl departing on 5/14. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

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

Cheapest round-trip
$82
Typical prices: $284-$194
Allegiant Air
Mon 6/1Fri 6/19
TYS - IAD • Non-stop
Cheapest one-way
$34
Typical prices: $94-$229
Allegiant Air
Thu 5/14
TYS - IAD • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
United's Priority Boarding ensures overhead bin space.
Lufthansa's Economy Light saves money without checked bags.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
You can fly direct with United Airlines and Allegiant Air. Average duration is 1h 39m
Direct flights
Direct flights
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+1
Direct flights
Direct flights
+1
When to travel
Cheapest • 48% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Dulles Intl!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Knoxville to Dulles Intl (TYS-IAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Knoxville to Dulles Intl 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Knoxville to Dulles Intl

Mon, Jun 1 - Fri, Jun 19
Allegiant Air Logo
12:55 pm - 2:18 pm
TYS
-
IAD
1h 23mnonstop
Allegiant Air Logo
3:19 pm - 4:53 pm
IAD
-
TYS
1h 34mnonstop
$82Allegiant Air
Fri, May 22 - Mon, May 25
Allegiant Air Logo
12:55 pm - 2:18 pm
TYS
-
IAD
1h 23mnonstop
Allegiant Air Logo
3:08 pm - 4:40 pm
IAD
-
TYS
1h 32mnonstop
$84Allegiant Air
Fri, May 22 - Mon, May 25
Allegiant Air Logo
12:55 pm - 2:18 pm
TYS
-
IAD
1h 23mnonstop
Allegiant Air Logo
3:08 pm - 4:40 pm
IAD
-
TYS
1h 32mnonstop
$85Allegiant Air
Fri, May 22 - Mon, May 25
Allegiant Air Logo
12:55 pm - 2:18 pm
TYS
-
IAD
1h 23mnonstop
Allegiant Air Logo
3:08 pm - 4:40 pm
IAD
-
TYS
1h 32mnonstop
$88Allegiant Air
Fri, Jul 24 - Mon, Jul 27
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
$107Allegiant Air
Sun, Oct 11 - Thu, Oct 15
Allegiant Air Logo
1:37 pm - 3:03 pm
TYS
-
IAD
1h 26mnonstop
Allegiant Air Logo
4:53 pm - 6:21 pm
IAD
-
TYS
1h 28mnonstop
$126Allegiant Air
Mon, Jun 1 - Fri, Jun 12
Multiple Airlines Logo
12:55 pm - 2:18 pm
TYS
-
IAD
1h 23mnonstop
Multiple Airlines Logo
11:17 am - 9:50 pm
IAD
-
TYS
10h 33m
2 stops
$132Multiple Airlines
Fri, Jun 5 - Mon, Jun 8
Multiple Airlines Logo
12:49 pm - 2:16 pm
TYS
-
IAD
1h 27mnonstop
Multiple Airlines Logo
2:52 pm - 11:39 pm
IAD
-
TYS
8h 47m
2 stops
$136Multiple Airlines
Sun, May 10 - Thu, May 14
Allegiant Air Logo
11:27 am - 1:11 pm
TYS
-
IAD
1h 44mnonstop
Allegiant Air Logo
2:01 pm - 3:41 pm
IAD
-
TYS
1h 40mnonstop
$137Allegiant Air
Fri, Jun 5 - Mon, Jun 8
Multiple Airlines Logo
12:49 pm - 2:16 pm
TYS
-
IAD
1h 27mnonstop
Multiple Airlines Logo
11:07 am - 9:50 pm
IAD
-
TYS
10h 43m
2 stops
$138Multiple Airlines
Booking Insights

KAYAK's insights & trends for Knoxville to Dulles Intl flights

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

How much is a round-trip flight from Knoxville to Washington, D.C. Dulles Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Knoxville to Washington, D.C. Dulles Intl Airport departing in June.

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville to Washington, D.C. Dulles Intl Airport, 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 Knoxville to Washington, D.C. Dulles Intl Airport is March, where tickets cost $130 (return) on average. On the other hand, the most expensive months are September and May, where the average cost of round-trip tickets is $359 and $344 respectively.

Expert advice

Expert advice for your flight from Knoxville to Dulles Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Good to know

Low seasonJanuary
Cheapest flight$34
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Knoxville to Washington Dulles Airport

When to book flights from Knoxville to Dulles Intl

Are your dates flexible? Find out the best times to travel from Knoxville to Dulles Intl 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 Knoxville to Washington Dulles Airport flights

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

    In the last 3 days, the lowest price for a flight from Knoxville to Washington, D.C. Dulles Intl Airport was $34 for a one-way ticket and $82 for a round-trip.

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

    A passport is not required to fly from Knoxville to Washington Dulles Airport.

  • Which airports will I be using when flying from Knoxville to Washington Dulles Airport?

    Knoxville airport is called Knoxville McGhee Tyson and the only airport in Washington Dulles Airport is Washington, D.C. Dulles Intl.

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

    All the following airlines offer inflight Wi-Fi service on the Knoxville to Washington Dulles Airport flight route: American Airlines, Delta, KLM, Virgin Atlantic, Air France, Alaska Airlines, and Hawaiian Airlines.

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Knoxville to Washington, D.C. are United Airlines and Allegiant Air. With an average price for the route of $307 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 $90 and an overall rating of 7.3.

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

    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 Knoxville to Washington Dulles Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Knoxville 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 Knoxville to Washington Dulles Airport?

    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 Washington Dulles Airport with an airline and back to Knoxville with another airline. Booking your flights between Knoxville and IAD 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 Knoxville to Washington Dulles Airport?

    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 Washington Dulles Airport from Knoxville 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 Knoxville to Washington, D.C. Dulles Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $123 or less one-way and $499 or less round-trip.

Prefer to fly direct from Knoxville to Washington Dulles Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Knoxville McGhee Tyson to Washington, D.C. Dulles Intl.
Find which airlines fly direct from Knoxville McGhee Tyson Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

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

Monday

Allegiant Air,United Airlines

Allegiant Air,United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

Allegiant Air,United Airlines

Allegiant Air,United Airlines

Friday

Allegiant Air,United Airlines

Allegiant Air,United Airlines

Saturday

United Airlines

United Airlines

Sunday

Allegiant Air,United Airlines

Allegiant Air,United Airlines

See more direct flights

Direct returns

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

Monday

Allegiant Air,United Airlines

Allegiant Air,United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

Allegiant Air,United Airlines

Allegiant Air,United Airlines

Friday

Allegiant Air,United Airlines

Allegiant Air,United Airlines

Saturday

United Airlines

United Airlines

Sunday

Allegiant Air,United Airlines

Allegiant Air,United Airlines

See more direct flights

Reviews of the top airlines flying from Knoxville to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Knoxville to Washington, D.C.. 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 Knoxville to Dulles Intl? 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 9678 reviews
7.7Boarding
6.6Food
7.1Entertainment
8.1Crew
7.3Comfort
Airline reviews

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

8.0 ExcellentAnonymous, Apr 2026
DEN - IAD
Read more United Airlines reviews

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Terrific in every way. On time, professional staff, multiple movie options to select, great food and drink.

My bags were misplaced!!! Im in a foreign country with no bags

I liked that it was on time, however, the food was not good.

Offered to check carry on to final destination. This is the most absurd thing in the world. I'm carrying on because I need what is in the carry-on. I'm okay with picking up at next stop but then I will be on much larger plane that can accommodate it. Also, if there is ever a change to your flight. Go to the airport and have the people there fix your ticket. Don't do it over the phone or online with United they screwed us up and ended up with flights for our last leg that took off before our first leg.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

It was okay, the food was good, but after the landing there was not enough time for luggage and security to catch a connection. It was crowded on board.

When I went to check in at the United counter in Barcelona, Spain I had 2 different menat 2 different times in United uniforms (standing around with a couple other employees) ask me if I was traveling alone. The one man asked me 3 different ways if I was traveling alone. I am, 68 yeaers old and have all my faculties. I thought it was weird and it made me feel very uncomfortable. What difference does it make if I was traveling alone or with someone? What if I was a recent widow? That would have been horrible. They never gave me a reason why they needed to know who I was traveling with. I was hesitant to question them because I needed to be on that flight.

Crew was great. 2 1/2 hour delay was due to staff needing "rest" was avoidable and self inflicted as United not willing to hire enough crew to keep flight on time.. Ridiculous. The crew and the passengers both suffered due to this.

Fine not above and beyond as I had a connection that was delayed due to maintenance

Great. No choice for n/a. No food or entertainment options

No food is available without purchasing it and there is no in-flight entertainment. Both of these are OK because we got an inexpensive flight from Allegiant and, otherwise, our experience was excellent.

just had water and there was plenty of leg & seat room. But then i don't weight 220#s!!

Not totally their fault- screaming kids that had zero parent intervention.

It was cold on the flight. The crew was very pleasant. I didn't order any food. We were delayed due to Captain waiting on maintenance log. He kept us informed though. The flight itself was smooth. I would definitely fly with Allegiant again!

I had a fantastic experience with Allegiant. I had wheelchair assistance and they helped me find my luggage and brought me to my car. Even loaded my luggage. Wonderful service!! Thank you Allegiant!

Superb. Staff great. Great flight. As with other airlines, seating too tight and restrictive.

There is not one likable thing about this airline. It’s starts with the deceptive pricing and continues through the whole flight. The worst staff I’ve ever experienced way over priced bags absolutely no food or drink (unacceptable and you should be embarrassed) the seats are cramped and uncomfortable there is no entertainment there is nothing about this trash airline that constitutes any amount of money. It’s worse than spirit and way more expensive it is disgraceful. Do not travel with Allegiant I repeat do not bother no matter what they say the price is it is never ever going to be the right choice I’m mind blown at how awful the entire experience was I’m embarrassed that I chose so poorly I cannot reiterate enough how beyond horrible this company and its staff are, not one person on this flight or at the airport is qualified to sweep up trash on a city sidewalk they should certainly never be given any job that requires a brain or manners or communication with human beings, what a disgrace to the human race. Your criminal chiselers and should be put out to pasture

Great flight. Friendly staff. Free snacks and drinks would be nice. I would love fewer taxes and fees added on.

My 90 year old father flew with me. He needed wheel chair assistance and is nearly deaf. The staff was amazing with him.

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

Information on your arrival and departure airports