$34 Find Cheap Flights from Knoxville to District of Columbia - Compare and Save

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 District of Columbia departing on 10/25. 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.
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Book Cheap Knoxville to District of Columbia 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 District of Columbia 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 District of Columbia

Thu, Oct 22 - Sun, Nov 1
Allegiant Air Logo
7:45 am - 9:11 amTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 26mnonstop
Allegiant Air Logo
8:16 am - 9:44 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 28mnonstop
$59Allegiant Air
Thu, Nov 5 - Sun, Nov 22
Allegiant Air Logo
7:45 am - 9:13 amTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 28mnonstop
Allegiant Air Logo
8:32 pm - 10:04 pmIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 32mnonstop
$66Allegiant Air
Thu, Oct 29 - Sun, Nov 1
Allegiant Air Logo
7:45 am - 9:11 amTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 26mnonstop
Allegiant Air Logo
8:16 am - 9:44 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 28mnonstop
$68Allegiant Air
Thu, Oct 22 - Sun, Nov 1
Multiple Airlines Logo
2:01 pm - 5:36 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
27h 35m2 stops Jacksonville Atlanta Hartsfield-Jackson
Multiple Airlines Logo
8:16 am - 9:44 amIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 28mnonstop
$150Multiple Airlines
Fri, Oct 16 - Sun, Oct 18
Multiple Airlines Logo
7:00 am - 7:09 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
12h 09m1 stop Orlando
Multiple Airlines Logo
3:53 pm - 5:21 pmIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 28mnonstop
$166Multiple Airlines
Thu, Oct 1 - Sun, Oct 4
Multiple Airlines Logo
1:37 pm - 3:03 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 26mnonstop
Multiple Airlines Logo
6:13 pm - 7:24 pmIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
25h 11m1 stop Fort Lauderdale
$172Multiple Airlines
Sat, Sep 5 - Sun, Sep 6
American Airlines Logo
11:15 am - 12:59 pmTYS  Knoxville McGhee Tyson-DCA Washington, D.C. Reagan-National
1h 44mnonstop
American Airlines Logo
8:52 am - 10:40 amDCA  Washington, D.C. Reagan-National-TYS Knoxville McGhee Tyson
1h 48mnonstop
$193American Airlines
Fri, Sep 4 - Sun, Sep 6
American Airlines Logo
7:04 am - 8:57 amTYS  Knoxville McGhee Tyson-DCA Washington, D.C. Reagan-National
1h 53mnonstop
American Airlines Logo
7:46 pm - 9:34 pmDCA  Washington, D.C. Reagan-National-TYS Knoxville McGhee Tyson
1h 48mnonstop
$215American Airlines
Sat, Oct 10 - Wed, Oct 14
United Airlines Logo
7:25 pm - 9:09 pmTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 44mnonstop
United Airlines Logo
12:55 pm - 2:42 pmIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 47mnonstop
$227United Airlines
Sat, Nov 7 - Sat, Nov 14
United Airlines Logo
5:45 am - 7:28 amTYS  Knoxville McGhee Tyson-IAD Washington, D.C. Dulles Intl
1h 43mnonstop
United Airlines Logo
5:45 pm - 7:36 pmIAD  Washington, D.C. Dulles Intl-TYS Knoxville McGhee Tyson
1h 51mnonstop
$227United Airlines
Booking Insights

KAYAK's insights & trends for Knoxville to District of Columbia flights

Get data-powered insights and trends into flights from Knoxville to District of Columbia 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 District of Columbia?

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 District of Columbia departing in October.

Flight prices are below average for this route right now.

Flights to District of Columbia from Knoxville usually cost between $80 and $304 in October.
The lowest price found in the past 5 days was $59 on Allegiant Air (Oct 22-Nov 1).

What is the cheapest Knoxville to District of Columbia flight route?

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

The cheapest ticket to District of Columbia from Knoxville found in the last 5 days was to Washington, D.C., at $84 round-trip. The most popular route is from Knoxville (TYS) to Washington, D.C. Dulles Intl Airport (IAD), and the cheapest round-trip airline ticket found on this route in the last 5 days was $84.

What is the cheapest time of day to fly to District of Columbia?

The average price for all round-trip flights from Knoxville to District of Columbia depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to District of Columbia is generally in the evening, when round-trip flights cost $300 on average. Morning departures are around 24% more expensive than evening flights, on average. The most expensive time of day to fly to District of Columbia is generally at night, which is peak travel time and where the average cost of a ticket is $906.

Can I save money by flying with a layover from Knoxville to District of Columbia?

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $259 on average.

What is the cheapest month to fly from Knoxville to District of Columbia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville to District of Columbia, 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 District of Columbia is February, when tickets cost $215 (return) on average. On the other hand, the most expensive months are July and September, when the average cost of round-trip tickets is $299 and $299 respectively.

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

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

For Knoxville to District of Columbia, Friday is the cheapest day to fly on average and Saturday is the most expensive. Flying from District of Columbia back to Knoxville, the best deals are generally found on Thursday, with Saturday being the most expensive.

Good to know

Low season

January

Cheapest flight

$34
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Knoxville to Washington Dulles Airport

FAQs - booking District of Columbia flights

  • How does KAYAK find such low prices on flights from Knoxville to District of Columbia?

    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 District of Columbia.

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

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

    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 District of Columbia 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 District of Columbia?

    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 District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to District of Columbia

  • Looking for a cheap flight? 25% of our users found tickets from Knoxville to the following destinations at these prices or less: Washington, D.C. $278 one-way - $324 round-trip; Washington, D.C. $176 one-way - $404 round-trip

Reviews of the top 4 airlines serving from Knoxville to District of Columbia

 
See real verified KAYAK customer reviews for airlines flying from Knoxville to District of Columbia. 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 District of Columbia? 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
SouthwestOverall score based on 4220 reviews
7.5Entertainment
7.0Food
8.0Comfort
8.6Crew
8.1Boarding
Airline reviews

Exceptional. The gate crew responded quickly and got me onto this earlier flight as the final passenger, saving me more than four hours of wait time for my reserved flight.

10.0 ExcellentAnonymous, Aug 2026
Read more Southwest reviews

Exceptional. The gate crew responded quickly and got me onto this earlier flight as the final passenger, saving me more than four hours of wait time for my reserved flight.

I'm glad it wasn't only 75% full because I could get a good seat

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

Still need to work out the kinks on the new assigned seating boarding process. Otherwise, a very good flight.

Okay, not wonderful. Short flight. Wi-fi didn't work properly. Stuck waiting for a gate to open upon arrival for 20 or so minutes.

Worst experience I had on Southwest. Still better than most, but the seating was barely tolerable.

Cluster mess boarding. Can't wait for SWA reserved seating. Internet didn't seem to work on the plane.

The flight was delayed about 20 minutes, but this was an evening flight, so it comes as no surprise. This flight came a good 1.5 days ahead of hurricane Helene which was still far out in the gulf. However, the flight never removed the seated buckle light. The staff announced from the beginning that due to the bad weather (I suppose the hurricane a day and a half away) they would have to do an abbreviated service with water and a snack. I am fine with their water and snack offering, but this was one of the smoothest flights I've had in years. If Southwest believes a flight like this requires everyone to remain seated, then all of their flights should remain buckled for the entire flight. I cannot help but wonder if things like this are a sneaky way to cut back on expenses since the airline is currently under a lot of pressure to reduce costs.

Although the flight was delayed, but the crew was amazing. They did the best they could to make the time enjoyable.

My experience was find with Southwest. The only issue I have is...at the exact time for me to check in...I don't understand how I always end up in C.

Our flight gor canceled and there was no one to help us but told us to scan the qr code and fill the forms on-line. Very poor service especially we are tourists traveling to Washington DC for the 1st time.

Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.

The head rest is too big and cannot be placed differently/removed. Causes one head to tilt forward and increase back pain

It was terribly delayed with zero support from united airlines. I reached at 1 am in the night. They did not provide any option to change the flights.

Flight was delayed 14 hours due to DC air show and weather. Missed connection to MUC.

Horrible I am at almost 2,000,000 miles on United. This was probably the worst flight ever. An hour and a half before takeoff I get a message that they’re changing the plane and I no longer have a seat in Polaris business Supposedly, there was a problem with the plane, but then there was no other plane Finally, they decided to bring a plane from Newark to Washington Dulles Of course the original flight was at 10:45 PM so by the time the plane got there it was 12:30 AM. It had not been cleaned. It had not been catered. They don’t really have people available to do those things when it’s not pre-programmed at 1 o’clock in the morning. The crew had to be changed And the new plane held 28 fewer people than the scheduled plane There is no way you can hate United Airlines enough The people at the gate were actually just fine, but it was management who was completely useless And did they send extra help to the people at the gate? Did they send supervisors? Of course not. Just don’t take United find somebody else or buy a boat

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Even though we were delayed, we were able to make our connection

It was poor a four hour delay and no explanation for the delay. What’s a 35 dollars going to do. It also made me miss my car rental,

It was on time. Flight was comfortable. Staff was nice. It was the way a flight should always be.

The price was the only good thing about this flight. It was scary during takeoff when the plane tilted side to side. It made me feel very nervous as I have never had a take-off that unsmooth. There was no on-flight movie or music options and the only complimentary option was water. Other airlines offer trail mix or a caramel cookie and pop options as complimentary. This flight was a 2.5 hour flight. I understand for shorter flights not having options, but a flight 2 hours or longer should offer more complimentary options and in flight entertainment. Also the seats did not recline and for a longer flight reclining seats are a must for comfort.

A very pleasant flight but it would be greatly improved with wifi to help entertain kids

This is a no frills, get it done, efficient airline. The seat is a lawn chair. You better bring your own entertainment. If you want something other than water you need to pay for it. But they will get you to your destination quickly, on time, and then they will turn the flight around and go right back where they came from. Reliably. Couple times a week tops. If it fits into your schedule, you can’t get there cheaper or faster.

A three hour delay to board and then another hour on the tarmac because they couldn't get a tractor? Ugh.

Allegiant canceled the flight. The flight the next day was full. Allegiant did not provide any compensation besides a refund. Last time on Allegiant.

Seats were very uncomfortable and being charged for snacks and water.........

Allegiant actually impressed me, original inbound flight from PBG was so late they gave us a bird inbound from Des Moines and only left 1h late and gained 40 minutes back in the air. Comfortable flight with no frills but no complaints.

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.

On time departure & early arrival. Made a long day much better.

Like all planes recently, entertainment is achieved by giving the patron free WiFi and letting them stream shows via the screen on a phone or tablet.

Horrible experience upon landing. Probably more due to DCA utter incompetence than AA.

Not to have gotten delayed by 2+ hours for the fourth straight American flight. They're the worst.

Did not get any refreshments. Crew was very nice but limited. Small seats

Wish a flight with more than 2 hours with some snack rather than just cookie/biscuit.

I didn’t like anything, being platinum pro get you absolutely nowhere and does not increase the customer service treatment whatsoever anymore. My flight was canceled and they put me on a flight eight hours later that would’ve got me back in the middle of the night. They could’ve easily move me up to an hour Prior on an earlier flight. My second flight was unreasonable to take, the third flight was also canceled due to mechanical issues like the first flight. I don’t know what’s going on with American, but they are falling apart, after seven flight changes I finally got home, Unreasonable.

This was a horrible American Airlines experience, and it discourages me from flying with them again. It may have stemmed from a mechanical delay, but it appeared that the team was unprepared to respond to the delay. After boarding, we waited an hour before finally taking off. After landing at our destination, we waited an additional hour on the tarmac waiting for a gate (at 8:00pm) to be assigned and cleared. The flight crew did their best, but they were clearly tired and also ready to be done for the day. Because of the delay, I missed a connecting flight. It was a very poor experience.

Fantastic! If it had not been for a check-in agent in Knoxville I may have not gotten my passes on British Airways. I couldn’t check-in online because British Airways had messed us the info on my tickets to London & Inverness. AA’s was great! British Airways was a continuous series of delays and frustrations.

Wheelchair was waiting for me,changed to a better seat which was great as it's hard for me to walk

Everything you need to know for your flight from Knoxville to District of Columbia

Information on your arrival and departure airports