TYS - DEN

$44 Find Cheap Flights from Knoxville to Denver

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 Denver departing on 6/24. 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 Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to Denver.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to Denver.
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Everything you should know

Cheapest round-trip
$137
Typical prices: $372-$128
Allegiant Air
Thu 8/13Sun 8/16
TYS - DEN • Non-stop
Cheapest non-stop
$142
Typical prices: $333-$188
Frontier
Wed 6/17Wed 6/24
TYS - DEN • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Frontier's Economy Bundle includes carry-on and seat choice.
Allegiant's Bonus bundle adds ticket flexibility and convenience.
Expert advice
Expert advice
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Top airlines
Cheapest • from $142 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
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+1
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Airline reviews
+1
Nonstop flights
You can fly direct with United Airlines, Southwest and others. Average duration is 3h 24m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 34% compared to booking last minute.
Insights
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When to travel
Cheapest • 22% price drop
Most popular
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Flight Deals

Cheap Flights from Knoxville to Denver (TYS-DEN)

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

Thu, Aug 13 - Sun, Aug 16
Allegiant Air Logo
7:00 am - 8:21 am
TYS
-
DEN
3h 21mnonstop
Allegiant Air Logo
9:11 am - 2:01 pm
DEN
-
TYS
2h 50mnonstop
$137Allegiant Air
Wed, Jun 17 - Wed, Jun 24
Frontier Logo
8:32 pm - 10:12 pm
TYS
-
DEN
3h 40mnonstop
Frontier Logo
2:46 pm - 7:37 pm
DEN
-
TYS
2h 51mnonstop
$142Frontier
Thu, Jun 18 - Wed, Jun 24
Multiple Airlines Logo
7:00 am - 8:15 am
TYS
-
DEN
3h 15mnonstop
Multiple Airlines Logo
2:46 pm - 7:37 pm
DEN
-
TYS
2h 51mnonstop
$148Multiple Airlines
Thu, Aug 6 - Mon, Aug 10
Multiple Airlines Logo
7:00 am - 8:21 am
TYS
-
DEN
3h 21mnonstop
Multiple Airlines Logo
2:46 pm - 7:36 pm
DEN
-
TYS
2h 50mnonstop
$151Multiple Airlines
Thu, Jun 18 - Wed, Jun 24
Multiple Airlines Logo
7:00 am - 8:15 am
TYS
-
DEN
3h 15mnonstop
Multiple Airlines Logo
2:46 pm - 7:37 pm
DEN
-
TYS
2h 51mnonstop
$152Multiple Airlines
Thu, Jul 30 - Sun, Aug 2
Allegiant Air Logo
7:00 am - 8:11 am
TYS
-
DEN
3h 11mnonstop
Allegiant Air Logo
9:01 am - 1:51 pm
DEN
-
TYS
2h 50mnonstop
$160Allegiant Air
Thu, Aug 6 - Sun, Aug 9
Allegiant Air Logo
7:00 am - 8:21 am
TYS
-
DEN
3h 21mnonstop
Allegiant Air Logo
9:11 am - 2:01 pm
DEN
-
TYS
2h 50mnonstop
$161Allegiant Air
Wed, Jun 24 - Fri, Jun 26
Frontier Logo
8:32 pm - 10:12 pm
TYS
-
DEN
3h 40mnonstop
Frontier Logo
2:46 pm - 7:37 pm
DEN
-
TYS
2h 51mnonstop
$162Frontier
Wed, Aug 19 - Fri, Aug 21
Multiple Airlines Logo
8:32 pm - 10:12 pm
TYS
-
DEN
3h 40mnonstop
Multiple Airlines Logo
6:00 am - 2:01 pm
DEN
-
TYS
6h 01m
1 stop
$163Multiple Airlines
Thu, Oct 8 - Thu, Oct 15
Allegiant Air Logo
6:30 am - 7:36 am
TYS
-
DEN
3h 06mnonstop
Allegiant Air Logo
8:26 am - 1:11 pm
DEN
-
TYS
2h 45mnonstop
$165Allegiant Air
Booking Insights

KAYAK's insights & trends for Knoxville to Denver flights

Get data-powered insights and trends into flights from Knoxville to Denver 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 Denver?

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 Denver departing in August.

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

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

Your flight ticket price will generally be cheaper if you fly to Denver on a Thursday and more expensive on a Wednesday. On your return trip to Knoxville, you should consider flying back on a Thursday, and avoid Wednesdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville to Denver, 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 Denver is November, where tickets cost $223 (return) on average. On the other hand, the most expensive months are March and January, where the average cost of round-trip tickets is $382 and $339 respectively.

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

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 Denver, 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 Denver, you should book around 4 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Expert advice

Expert advice for your flight from Knoxville to Denver

 
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
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines and Frontier

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.

Daniel Scheffler

Daniel Scheffler

Expert on Allegiant Air

Daniel Scheffler is a travel writer, podcaster, and producer. Born in Africa, bred in Europe and now living in America he has traveled to 140 countries (and all 50 U.S. states). Plus he has stayed at over 2500 hotels across the globe. His original shows Everywhere and Without Maps (available on Spotify) showcase his beliefs, travel is about humanity and sharing that beauty. And thus it reminds you that you shouldn’t believe everything you think.

Good to know

Low seasonMarch
Cheapest flight$44
Best time to beat the crowds but there is an average 34% increase in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Knoxville to Denver

When to book flights from Knoxville to Denver

Are your dates flexible? Find out the best times to travel from Knoxville to Denver 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 Knoxville to Denver

  • Where can I sleep at Denver International Airport?

    If you wish to stay at the airport, book a stay at the Westin Hotel at Denver International Airport. The establishment is on the upper level of the Jeppesen Terminal. It offers fitness facilities, an indoor pool, and multiple dining options. They offer day rooms, overnight stays, and DEN airport train connections.

  • Does McGhee Tyson Airport offer accessible services?

    DEN offers ramps and elevators for barrier-free access. PRM also has accessible restrooms, reserved parking spots, and accessible means of public transport. They can also request wheelchair assistance at DEN through their airline. Hard-of-hearing passengers traveling through will have TDD telephones and visual paging services, while low-vision passengers get Aira services and braille signage.

  • What are the transport options from Denver International Airport?

    DEN is served by Regional Transportation (RTD) trains and buses, and you can get affordable public transportation downtown. Bus routes AT, 145X, AA, AB, and 169L are available at the DEN Airport station, and these services are offered every 15min. RTD Line A train provides services between DEN and downtown, and the trains are available every 15-30min. Several companies also offer charter buses from DEN to the neighboring cities in Colorado. These buses are pre-booked, and you can get more information on your bus at the ground transportation desk. Taxis are available curbside, offering a flat rate downtown and metered rates for other Denver destinations.

  • Which airlines have lounges at Denver International Airport?

    Delta, American Airlines, and United Airlines have lounges at DEN. Delta runs a members-only lounge, but you can pay at the door to access the AA and United lounges. The Delta Sky Club is on Concourse A airside, near the Center Core. The American Airlines lounge is on Concourse A airside, on the north end of the A Gates. United Club has two locations, one in each airport wing (west and east).

  • What is the cheapest flight from Knoxville to Denver?

    In the last 3 days, the lowest price for a flight from Knoxville to Denver was $44 for a one-way ticket and $142 for a round-trip.

  • Do I need a passport to fly between Knoxville and Denver?

    No, a passport isn't needed to fly from Knoxville to Denver. However, local authorities might ask for an official ID.

  • Which airlines offer Wi-Fi service onboard planes from Knoxville to Denver?

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

  • Which aircraft models fly most regularly from Knoxville to Denver?

    The Airbus A320-100/200 is the aircraft model that flies most regularly on the Knoxville to Denver flight route.

  • Which airline alliances offer flights from Knoxville to Denver?

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

  • On which days can I fly direct from Knoxville to Denver?

    There are nonstop flights from Knoxville to Denver on a daily basis.

  • Which is the best airline for flights from Knoxville to Denver, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Knoxville to Denver are Southwest and Delta. With an average price for the route of $384 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $317 and an overall rating of 7.9.

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

    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 Denver.

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

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

    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 Denver with an airline and back to Knoxville with another airline. Booking your flights between Knoxville and DEN 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 Denver?

    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 Denver 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 Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for $146 or less one-way and $353 or less round-trip.
  • Denver International Airport (DEN) has the hub and spoke layout, the Jeppesen Terminal serving as the hub to three Concourses A, B, and C. The airport has provided an underground train running every 5min for transport through the airport complex.
  • McGhee Tyson Airport (TYS) welcomes pets to their facility, providing a pet relief area to accommodate them. The relief area is located outdoors, on the lower level of the terminal building, just in front of the Airport Hilton.
  • Public Service Credit Union has a full-service branch operating in the Jeppesen Terminal at DEN if you're looking for banking services at the destination airport. The bank is landside on Level 6 West and is operational from 9 am to 6 pm on weekdays.
  • Unwind with a massage after your flight at the A Massage spa at DEN. They offer express table and chair massage services at their three locations. You'll find them at the Center Core, A Gates, and B Gates. XpresSpa also offers its services at DEN. XpresSpa has two C Gate locations and one at the Center Core.
  • Around 759 kg of carbon is emitted on flights from Knoxville to Denver. However, book your flight with Allegiant Air if you wish to fly sustainably. They offer a flight that emits 49% less carbon per passenger on this route.

Prefer to fly direct from Knoxville to Denver?

 
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 Denver Intl.
Find which airlines fly direct from Knoxville McGhee Tyson Airport to Denver Intl Airport, which days they fly and book direct flights.

Direct departures

Knoxville McGhee Tyson to Denver Intl

Monday

Frontier,United Airlines,Southwest

Frontier,United Airlines, +1 more

Tuesday

United Airlines,Southwest

United Airlines,Southwest

Wednesday

United Airlines,Frontier,Southwest

United Airlines,Frontier, +1 more

Thursday

Allegiant Air,Frontier,United Airlines, +1 more

Allegiant Air,Frontier, +2 more

Friday

Frontier,United Airlines,Southwest

Frontier,United Airlines, +1 more

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

Allegiant Air,Frontier,Southwest, +1 more

Allegiant Air,Frontier, +2 more

See more direct flights

Direct returns

Denver Intl to Knoxville McGhee Tyson

Monday

Frontier,United Airlines,Southwest

Frontier,United Airlines, +1 more

Tuesday

United Airlines,Southwest

United Airlines,Southwest

Wednesday

United Airlines,Frontier,Southwest

United Airlines,Frontier, +1 more

Thursday

Allegiant Air,Frontier,United Airlines, +1 more

Allegiant Air,Frontier, +2 more

Friday

Frontier,United Airlines,Southwest

Frontier,United Airlines, +1 more

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

Allegiant Air,Frontier,Southwest, +1 more

Allegiant Air,Frontier, +2 more

See more direct flights

Reviews of the top 5 airlines serving from Knoxville to Denver

 
See real verified KAYAK customer reviews for airlines flying from Knoxville to Denver. 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 Denver? 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.
7.9
DeltaOverall score based on 8466 reviews
7.9Comfort
8.5Crew
8.1Boarding
7.8Entertainment
7.2Food
Airline reviews

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

4.0 OkayBradley, Apr 2026
RDU - ATL
Read more Delta reviews

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

WiFi didn’t work. Flight delayed 3 hours Crew members were illiterate Seat lean back did not work.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

This wasn't my experience with Delta. It was just the Pegasus flight. Seats were very hard. Staff was kinda rough. Not very nice. Charged me for snacks. For a 4 hour flight I would've expected more.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

The entertainment options on the seat back video boards were nice.

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

During landing. 2 crew members passed 3 times by my lane and didn't notice that people in front of us had their site to the furthermore reclined... That was uncomfortable and could have been dangerous.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

It’s always a great time flying with united airlines.

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

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.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

This flight was delayed but it worked in my favor because my Atlanta to Dallas flight was delayed.

This was a hard flight. 3 delays out of OKC (1 on the Tarmac). Delay in Atlanta coming to Dallas. total travel time was the equivalent of driving from OKC to Atlanta.

Like: flights are on time, good boarding process Can improve: planes are old, improve entertainment and make space more comfortable

Had to wait for a gate for a long time, then waited on the run way for a long time before leaving. The actual flights part was good.

Everything was delayed and the staff sent me to the wrong gate, causing me to miss one of my flights. I arrived at my destination 6 hours later than I was supposed to.

Air condition was not working for long both after boarding and also after landing ; unbearably hot and suffocating

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

It was an early flight and most people napped/slept and the crew let us which was nice.

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

The experience was good. No frills but I got there safe and sound and on time.

Everything you need to know for your flight from Knoxville to Denver

Information on your arrival and departure airports