$126 Find Cheap Flights from Knoxville to Washington

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 Washington departing on 9/10. 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

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

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Seattle
Seattle1 stop$265
Spokane
Spokane1 stop$289
Pasco
Pasco2 stops$389
Walla Walla
Walla Walla2 stops$595
Seattle
Seattle1 stop$265
Spokane
Spokane1 stop$289
Pasco
Pasco2 stops$389
Walla Walla
Walla Walla2 stops$595

Book Cheap Knoxville to Washington Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Knoxville to Washington 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 Washington

Sat, Sep 13 - Sat, Sep 20
American Airlines Logo
4:37 pm - 9:27 pmTYS-PDX
7h 50m1 stop
American Airlines Logo
2:06 pm - 12:21 amPDX-TYS
7h 15m1 stop
$251American Airlines
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Sat, Sep 13 - Fri, Sep 19
Delta Logo
6:40 am - 10:39 amTYS-PDX
6h 59m1 stop
Delta Logo
12:45 am - 1:10 pmPDX-TYS
9h 25m2 stops
$256Delta
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Sat, Sep 13 - Sat, Sep 20
Delta Logo
11:32 am - 7:45 pmTYS-PDX
11h 13m2 stops
Delta Logo
5:15 am - 5:03 pmPDX-TYS
8h 48m2 stops
$261Delta
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Thu, Aug 21 - Sat, Aug 30
Frontier Logo
8:36 pm - 9:34 amTYS-SEA
15h 58m1 stop
Frontier Logo
12:40 pm - 7:41 pmSEA-TYS
28h 01m1 stop
$265Frontier
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Sun, Aug 10 - Wed, Aug 13
Frontier Logo
5:25 pm - 12:16 amTYS-PDX
9h 51m1 stop
Frontier Logo
12:25 pm - 4:29 pmPDX-TYS
25h 04m1 stop
$265Frontier
Find Deal
Wed, Sep 24 - Mon, Sep 29
American Airlines Logo
4:37 pm - 9:27 pmTYS-PDX
7h 50m1 stop
American Airlines Logo
6:07 am - 4:19 pmPDX-TYS
7h 12m1 stop
$280American Airlines
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Wed, Aug 20 - Wed, Aug 27
United Airlines Logo
7:00 am - 11:49 amTYS-PDX
7h 49m1 stop
United Airlines Logo
5:00 am - 5:00 pmPDX-TYS
9h 00m2 stops
$318United Airlines
Find Deal
Sat, Aug 30 - Sat, Sep 6
United Airlines Logo
4:40 pm - 9:17 pmTYS-SEA
7h 37m1 stop
United Airlines Logo
11:54 pm - 10:13 amSEA-TYS
7h 19m1 stop
$325United Airlines
Find Deal
Tue, Aug 19 - Thu, Aug 28
Alaska Airlines Logo
5:30 am - 11:27 amTYS-SEA
8h 57m1 stop
Alaska Airlines Logo
12:33 am - 11:30 amSEA-TYS
7h 57m1 stop
$469Alaska Airlines
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Sun, Aug 24 - Sun, Aug 31
Alaska Airlines Logo
2:23 pm - 12:18 amTYS-ALW
12h 55m2 stops
Alaska Airlines Logo
5:00 am - 9:45 pmALW-TYS
13h 45m2 stops
$1,040Alaska Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Knoxville to Washington flights

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

What is the cheapest month to fly from Knoxville to Washington?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville to Washington, 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 is August, when tickets cost $558 (return) on average. On the other hand, the most expensive months are February and December, when the average cost of round-trip tickets is $726 and $719 respectively.

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

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

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

How far in advance should I book a flight from Knoxville to Washington?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Knoxville to Washington, 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 Knoxville to Washington, you should book around 3 weeks before departure, which saves you about 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.


Good to know

Low seasonJanuary
Cheapest flight$126
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from Knoxville to Portland

FAQs - booking Washington flights

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

    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.

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

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

    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 from Knoxville to Washington with an airline and back with another airline.

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

    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 from Knoxville to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Washington?

    The cheapest time of day to fly to Washington is generally at night, when round-trip flights cost $327 on average. Morning departures are around 1% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $697.

Reviews of the top 4 airlines serving from Knoxville to Washington

 
See real verified KAYAK customer reviews for airlines flying from Knoxville to Washington. 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 Washington? 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.
8.0
DeltaOverall score based on 7981 reviews
8.2Boarding
7.9Entertainment
8.5Crew
7.9Comfort
7.3Food
Airline reviews

My experience on any Delta flight is always overshadowed by the time Delta removed me from a flight for no apparent reason.

2.0 MediocreGim, Jul 2025BGM - DTW
Read more Delta reviews

My experience on any Delta flight is always overshadowed by the time Delta removed me from a flight for no apparent reason.

Check in process was terrible. Lady at counter didn’t know what she was doing

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Boarding was organised and relaxed. Crew were fantastic! Seats were lacking padding causing butt pain and stiffness.

Good flights. On time. They had a gluten free snack option which was nice

Food from the flight from Atlanta to Santiago was very poor..

Terrible. Delayed 7 hours, and cancelled the flight, leaving me stranded and out of pocket $500 for an alternative last minute flight

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We had to turn around and head back to Manchester. Problem with a plane engine.

Flight was delayed. Staff at the gate effectively and proactively communicated about the delay.

Very poor delay in dfw was really bad n long

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Because of rescheduling, they had to put me on a flight that didn't go through Dallas

It was very difficult to stretch my knee out and I am very short. I also had a torn tendon in my knee which made it extra uncomfortable anyways. My husband is 6'2" and I can't imagine him flying in that plane.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

What I expected, nickeled and dined and a frontier flight attendant loudly complained about her job and lack of communication as she headed to the gate on her cell phone. Not professional.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

After boarding and un-boarding twice over 6+hours, the flight was canceled.

Severe turbulence. Captain never came on to reassure passengers after things settled down.

My first flight was delayed 5 hours. The 2nd flight was canceled til the next day and the never even tried to compensate for it. Worse I was delayed again on the flight the rebooked me on.

Boarding in Orlando was not good. Giant mob at the gate, should have been lines.

Decent clean onboard experience. Okay discount airline experience. Unfortunately, any customer service interactions are difficult and unhelpful. There is no service. Also, a premium seat only gets you premium boarding if you line up first. Once they start general boarding you must go to the back of the line. Not very premium

baggage clamed had to wait over a hour and half for all people on my flight it was terrible

The ticketing agents were rude but then we had a great gate agent very nice we had to ride a buss out to where the plane was parked but it was in some back corner of the airport when we got to the plane the captain who was great btw was cleaning the plane because the same rude ticketing agent told them they we not contracted to vacuum the plane. The ride to las Vegas was fine We had a connecting flight to Dallas. The flight was fine but when we arrived in Dallas everyone who flew on any frontier airlines the picked up bags from baggage claim D15 had to wait over a hour for their bags to start we arrived at 11:30pm ish to the gate we didn't leave the baggage clamed till 12:50 am very not happy and i used to fly frontier 4 times a week for work in Denver i will not be using them again

I was 2 hr arrive in the airport and 45 min in the line . After take to my turn . The agent tell me I’m later . I can not board . So my vacation was going to the floor . Just for their bad customer service agent in the airline

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