WAS - TYS

$54 Find Cheap Flights from Washington, D.C. 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 Washington, D.C. to Knoxville departing on 5/29. 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 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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Everything you should know

Cheapest round-trip
$86
Overall average: $341
Allegiant Air
Wed 12/31Sat 1/3
IAD - TYS • Non-stop
Cheapest non-stop
$94
Typical prices: $243-$473
Allegiant Air
Sat 12/27Wed 12/31
IAD - TYS • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
American's Main Cabin Extra includes early boarding.
United's Economy Plus offers extra legroom benefits.
Expert advice
Expert advice
Expert advice
Expert advice
Video guide: How to find cheap flights to Knoxville
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Top airlines
Allegiant Air
Cheapest • from $154 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
IAD-TYS
Cheapest • 55% average savings
IAD-TYS
Most popular
Insights
Insights
Insights
Insights
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 25% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
August
Cheapest • 21% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Knoxville!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Washington, D.C. to Knoxville (WAS-TYS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Knoxville

Wed, Dec 31 - Sat, Jan 3
Allegiant Air Logo
2:35 pm - 4:15 pm
IAD
-
TYS
1h 40mnonstop
Allegiant Air Logo
2:23 pm - 4:07 pm
TYS
-
IAD
1h 44mnonstop
$86Allegiant Air
Sat, Dec 27 - Wed, Dec 31
Allegiant Air Logo
4:57 pm - 6:37 pm
IAD
-
TYS
1h 40mnonstop
Allegiant Air Logo
12:01 pm - 1:45 pm
TYS
-
IAD
1h 44mnonstop
$94Allegiant Air
Thu, Jan 8 - Fri, Jan 9
Multiple Airlines Logo
4:13 pm - 5:53 pm
IAD
-
TYS
1h 40mnonstop
Multiple Airlines Logo
6:18 pm - 9:08 am
TYS
-
IAD
14h 50m1 stop
$142Multiple Airlines
Fri, Feb 6 - Sun, Feb 8
Multiple Airlines Logo
9:35 am - 10:28 pm
IAD
-
TYS
12h 53m1 stop
Multiple Airlines Logo
1:39 pm - 3:23 pm
TYS
-
IAD
1h 44mnonstop
$143Multiple Airlines
Thu, Jan 8 - Sun, Jan 11
American Airlines Logo
1:59 pm - 3:56 pm
DCA
-
TYS
1h 57mnonstop
American Airlines Logo
6:00 am - 7:46 am
TYS
-
DCA
1h 46mnonstop
$189American Airlines
Tue, Dec 30 - Tue, Jan 6
American Airlines Logo
2:54 pm - 4:38 pm
DCA
-
TYS
1h 44mnonstop
American Airlines Logo
2:17 pm - 3:59 pm
TYS
-
DCA
1h 42mnonstop
$204American Airlines
Thu, Jan 8 - Sun, Jan 11
Delta Logo
7:30 pm - 11:45 pm
DCA
-
TYS
4h 15m1 stop
Delta Logo
5:40 am - 9:10 am
TYS
-
DCA
3h 30m1 stop
$209Delta
Thu, Mar 19 - Mon, Mar 23
Southwest Logo
9:20 am - 9:15 pm
BWI
-
TYS
11h 55m2 stops
Southwest Logo
7:50 am - 9:35 am
TYS
-
BWI
1h 45mnonstop
$222Southwest
Fri, May 8 - Tue, May 12
Southwest Logo
7:30 pm - 9:15 pm
BWI
-
TYS
1h 45mnonstop
Southwest Logo
8:15 am - 10:00 am
TYS
-
BWI
1h 45mnonstop
$227Southwest
Fri, Jan 23 - Sun, Jan 25
Delta Logo
6:00 pm - 11:45 pm
DCA
-
TYS
5h 45m1 stop
Delta Logo
5:40 am - 9:10 am
TYS
-
DCA
3h 30m1 stop
$244Delta
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Knoxville flights

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

Find cheap flights to Knoxville
Find cheap flights to Knoxville

Planning a trip from Washington, D.C. to Knoxville? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

What is the cheapest Washington, D.C. to Knoxville flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Washington, D.C. to Knoxville costs $78 on the route between Washington, D.C. Dulles Intl Airport (IAD) and Knoxville (TYS). Over the past month, this route was, on average, 55% cheaper than other Washington, D.C.-Knoxville routes. It is also the most popular route.

What’s the cheapest day of the week to fly from Washington, D.C. to Knoxville?

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

If you are looking for a flight deal from Washington, D.C. to Knoxville, look for departures on Fridays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Knoxville, Friday is the cheapest day to fly and Monday is the most expensive.

What is the cheapest month to fly from Washington, D.C. 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. 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. to Knoxville is August, where tickets cost $219 (return) on average. On the other hand, the most expensive months are February and April, where the average cost of round-trip tickets is $318 and $318 respectively.

Can I save money by flying with a layover from Washington, D.C. to Knoxville?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $297, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Washington, D.C. 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. 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. to Knoxville, you should book around 2 weeks before departure, which saves you about 25% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Expert advice

Expert advice for your flight from Washington, D.C. to Knoxville

 
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.
Airlines
American Airlines

American's Main Cabin Extra offers early boarding and complimentary drinks, enhancing your travel experience.


American Airlines provides high-speed Wi-Fi for purchase, with some free options for T-Mobile customers.

United Airlines

United offers Priority Boarding to avoid overhead bin space issues, placing you in Zone 2.


United's Economy Plus seats provide up to six inches more legroom than standard economy.

Our travel experts
Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

Stefanie Waldek

Stefanie Waldek

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.

Read more

Good to know

Low seasonFebruary
Cheapest flight$54
Best time to beat the crowds but there is an average 14% increase in price.
Most popular time to fly with an average 3% increase in price.
Flight from Washington Dulles Airport to Knoxville

When to book flights from Washington, D.C. to Knoxville

Are your dates flexible? Find out the best times to travel from Washington, D.C. 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 flights from Washington, D.C. to Knoxville

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Knoxville was $60 for a one-way ticket and $94 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. 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 airports will I be using when flying from Washington, D.C. to Knoxville?

    Washington, D.C. has 2 major airports: Washington, D.C. Reagan-National and Washington, D.C. Dulles Intl. Knoxville McGhee Tyson is the only airport in Knoxville. You’ll usually find the cheapest deals if you fly from Washington Dulles Airport.

  • Which airlines offer Wi-Fi service onboard planes from Washington, D.C. to Knoxville?

    American Airlines, JetBlue, and Delta offer inflight Wi-Fi service on the Washington, D.C. to Knoxville flight route.

  • Which aircraft models fly most regularly from Washington, D.C. to Knoxville?

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

  • Which airline alliances offer flights from Washington, D.C. to Knoxville?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Washington, D.C. and Knoxville, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Washington, D.C. to Knoxville?

    There are nonstop flights from Washington, D.C. to Knoxville on a daily basis.

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

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Knoxville are United Airlines and American Airlines. With an average price for the route of $316 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $311 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Washington, D.C. 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, D.C. to Knoxville.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Knoxville from Washington, D.C. 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, D.C. 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, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. 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, D.C. 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. to Knoxville

  • Looking for a cheap flight? 25% of our users found flights on this route for $128 or less one-way and $229 or less round-trip.

Prefer to fly direct from Washington, D.C. to Knoxville?

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

Direct departures

Washington, D.C. to Knoxville McGhee Tyson

Monday

American Airlines, United Airlines

American Airlines, United Airlines

Tuesday

American Airlines, United Airlines

American Airlines, United Airlines

Wednesday

American Airlines, United Airlines

American Airlines, United Airlines

Thursday

Allegiant Air, American Airlines, United Airlines

Allegiant Air, American Airlines, +1 more

Friday

American Airlines, United Airlines

American Airlines, United Airlines

Saturday

Allegiant Air, American Airlines, United Airlines

Allegiant Air, American Airlines, +1 more

Sunday

Allegiant Air, American Airlines, United Airlines

Allegiant Air, American Airlines, +1 more

See more direct flights

Direct returns

Knoxville McGhee Tyson to Washington, D.C.

Monday

American Airlines, United Airlines

American Airlines, United Airlines

Tuesday

American Airlines, United Airlines

American Airlines, United Airlines

Wednesday

American Airlines, United Airlines

American Airlines, United Airlines

Thursday

Allegiant Air, American Airlines, United Airlines

Allegiant Air, American Airlines, +1 more

Friday

American Airlines, United Airlines

American Airlines, United Airlines

Saturday

Allegiant Air, American Airlines, United Airlines

Allegiant Air, American Airlines, +1 more

Sunday

Allegiant Air, American Airlines, United Airlines

Allegiant Air, American Airlines, +1 more

See more direct flights

Reviews of the top 3 airlines serving from Washington, D.C. 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 Washington, D.C. 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 9094 reviews
6.6Food
8.1Crew
7.1Entertainment
7.3Comfort
7.7Boarding
Airline reviews

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

4.0 OkayAnonymous, Dec 2025
IAD - GRU
Read more United Airlines reviews

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

We were told the flight was delayed 5 times, then it was moved to the next day.

Flight delay was communicated before leaving for airport which caused it to be a non-event. Great flight and crew!

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

We fly American Airlines quite a bit. And we always fly business class when traveling internationally. We were a bit disappointed with the comfort of this particular plane as well as the entertainment options.

The AA staff person who checked our bags was curt and almost rude. The FA also seemed unhappy doing her job. Overall it was like riding the school bus back in grade school.

Crew should be nicer and emphatic with customers. Same cookies as the past 20 years. Seat are ok and the plane was clean though it was delayed.

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

They are still charging me after taking 466 and 833 for round trip from AR to to Bradley airport from 19 to 21. Then poor experience. Am hurt and I will say it on social media. Please stay away from this airline. I see in my bank account they are still taking 644. Am trying to stop it. I used to fly United airlines and I suggest that if you don't want extra charges and good service you go back there. American airlines delayed my flight again and I was late for my meeting, no recompensation but charging me over and over.

Clean, friendly, roomy. But check-in from the phone link was terrible. Repeated attempts wouldn’t save at the final step. Just kept spinning! It was very frustrating. Finally, I used the app (vs website link) to check-in which worked very smoothly on the first attempt.

Check in on the web portal was cumbersome! After several attempts I finally got the boarding pass.

Excellent flight and even arrived 23 min early. No entertainment , or wi fi on board, but I downloaded a couple of movies beforehand which kept me entertained. Really like flying Allegiant airlines.

WE were delayed about an hour and never any communications from the employees working the gate. We also were moved to a total of three gates.

I love how they show love to their customers and care about them too.

I liked how when I got on board how fast we ended up taking off but what I truly disliked was how uncomfortable the seats were. There was truly never a time that I could ever get comfortable during both of my flights. The seats could get away during shorter flights but flights 3 hour plus makes it hard to enjoy.

The crew was great and the flight was very smooth. Can’t really judge food since I did not get any because it costs money. The seat was comfortable for what we bought. Thanks!

Crew was great. No entertainment and food and beverage was for purchase only, even water

It was canceled. The flight wasn’t rescheduled, everyone had to figure out their own new arrangements. They said we would get refunded our original fare and receive an additional $150. We received links for $100 only and they expired before we could activate them.

The plane had originated in Las Vegas at 6:30 in the morning and flew to Moline where we boarded. The flight left around 12:30 PM and there were no boxed snacks available and many of the alcoholic beverages were unavailable. I would find it hard to believe that that many of the passengers coming from Las Vegas at 6:30 in the morning, drank and ate that much of the items. I can only come to the conclusion that someone failed to stock the plane for the round-trip. This is a huge revenue failure for the airline and disappointment for the passengers. The flight crew did not seem happy to be there and did not engage with passengers. Allegiant you can do better.

Everything you need to know for your flight from Washington, D.C. to Knoxville

Information on your arrival and departure airports