$156 Find Cheap Flights from Knoxville to Idaho - 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 Idaho departing on 10/31. 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

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Cheap Flights from Knoxville to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boise1 stop$266
Idaho Falls
Idaho Falls1 stop$364
Spokane
Spokane1 stop$311
Boise
Boise1 stop$266
Idaho Falls
Idaho Falls1 stop$364
Spokane
Spokane1 stop$311

Book Cheap Knoxville to Idaho 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 Idaho 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 Idaho

Sun, Nov 1 - Thu, Nov 12
Multiple Airlines Logo
9:29 pm - 2:57 pm
TYS
-
BOI
19h 28m
1 stop
Multiple Airlines Logo
3:52 pm - 10:35 pm
BOI
-
TYS
28h 43m
1 stop
$266Multiple Airlines
Sat, Aug 22 - Wed, Aug 26
American Airlines Logo
4:00 pm - 8:42 pm
TYS
-
GEG
7h 42m
1 stop
American Airlines Logo
12:44 pm - 11:18 pm
GEG
-
TYS
7h 34m
1 stop
$311American Airlines
Thu, Nov 5 - Sat, Nov 7
United Airlines Logo
5:05 pm - 10:59 pm
TYS
-
BOI
7h 54m
1 stop
United Airlines Logo
6:30 am - 4:04 pm
BOI
-
TYS
7h 34m
1 stop
$311United Airlines
Sat, Aug 22 - Tue, Aug 25
Delta Logo
6:35 am - 12:57 pm
TYS
-
GEG
9h 22m
1 stop
Delta Logo
12:36 pm - 11:52 pm
GEG
-
TYS
8h 16m
1 stop
$311Delta
Wed, Aug 26 - Sat, Aug 29
Delta Logo
6:25 pm - 11:09 pm
TYS
-
GEG
7h 44m
1 stop
Delta Logo
12:36 pm - 10:39 pm
GEG
-
TYS
7h 03m
1 stop
$311Delta
Tue, Sep 22 - Tue, Sep 29
American Airlines Logo
8:00 am - 1:19 pm
TYS
-
GEG
8h 19m
1 stop
American Airlines Logo
12:45 pm - 11:22 pm
GEG
-
TYS
7h 37m
1 stop
$311American Airlines
Wed, Sep 23 - Tue, Sep 29
American Airlines Logo
6:00 am - 11:55 am
TYS
-
GEG
8h 55m
1 stop
American Airlines Logo
12:45 pm - 11:22 pm
GEG
-
TYS
7h 37m
1 stop
$311American Airlines
Wed, Aug 26 - Sat, Aug 29
United Airlines Logo
1:53 pm - 8:46 pm
TYS
-
GEG
9h 53m
2 stops
United Airlines Logo
5:00 am - 3:46 pm
GEG
-
TYS
7h 46m
1 stop
$316United Airlines
Sun, Nov 1 - Thu, Nov 12
Multiple Airlines Logo
6:30 am - 2:57 pm
TYS
-
BOI
34h 27m
2 stops
Multiple Airlines Logo
3:52 pm - 10:35 pm
BOI
-
TYS
28h 43m
1 stop
$355Multiple Airlines
Fri, Sep 25 - Sun, Sep 27
Multiple Airlines Logo
7:00 am - 1:55 pm
TYS
-
BOI
8h 55m
1 stop
Multiple Airlines Logo
2:50 pm - 7:34 pm
BOI
-
TYS
26h 44m
2 stops
$366Multiple Airlines
Booking Insights

KAYAK's insights & trends for Knoxville to Idaho flights

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

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 Idaho departing in November.

Flight prices are below average for this route right now.

Flights to Idaho from Knoxville usually cost between $378 and $500 in November.
The lowest price found in the past 5 days was $266 on Multiple Airlines (Nov 1-Nov 12).

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville to Idaho, 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 Idaho is October, when tickets cost $0 (return) on average. On the other hand, the most expensive months are December and March, when the average cost of round-trip tickets is $1,038 and $850 respectively.

Good to know

Low season

November

Cheapest flight

$156
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Knoxville to Spokane

FAQs - booking Idaho flights

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

    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 Idaho.

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

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

    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 Idaho 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 Idaho?

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

Reviews of the top 3 airlines serving from Knoxville to Idaho

 
See real verified KAYAK customer reviews for airlines flying from Knoxville to Idaho. 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 Idaho? 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.
7.8
DeltaOverall score based on 8497 reviews
7.8Comfort
8.5Crew
7.2Food
8.1Boarding
7.8Entertainment
Airline reviews

I missed the flight because the Minneapolis flight was 49 minutes LATE, and the Boise flight LEFT 24 minutes EARLY!

2.0 MediocreAnonymous, Jul 2026
MSP - BOI
Read more Delta reviews

I missed the flight because the Minneapolis flight was 49 minutes LATE, and the Boise flight LEFT 24 minutes EARLY!

My flight home from Knoxville, TN, included a layover in Atlanta. I boarded the aircraft in Zone 5 and although there was limited overhead space, I was able to put my 'backpack' style roller-bag above my seat. Unfortunately, due to continued bad weather, we had to deplane. There were many people who would have missed their connection, so they rebooked. When we were re-boarding, the gate agent welcomed zone 5 and then made an announcement: All roller-bags for zone 5 passengers and higher will need to be gate checked. I promptly pushed the telescoping handle in and held my bag like a backpack. I was able to bring it on board, which was a relief. Upon entering the aircraft it became apparent that there was easily 40% open overhead space. There were audible signs of angry passengers who felt duped into checking their bags when in fact there were noticeably LESS passengers on the aircraft and TONS of overhead space. I'm not sure what kinds of parameters are used to determine when to cut off roller-bags from being brought on board, but it seemed deceptive and underhanded to have so many people get stuck checking their bags when clearly there was ample room for at least one more zone.

The CRJ-900 was clean but the overhead air vents were broken in our First Class row, making the cabin very hot until about 30 mins into the flight. The flight attendants were both extremely apologetic and accommodating though so that is why I rated the flight as very good. They checked on us many times and truly showed they cared. The snacks for an hour and a half flight could be better. Would be nice if there was a small plated meal over convenient store snacks. WiFi also was not working. And it would be nice if Delta had adjustable headrests on these planes.

I was in Comfort and we didn’t get any drinks, chips or anything! First Class got full service on the flight and Comfort got nothing. Seat was horrible and uncomfortable

Short trip, no food and therefore no expectation for much interaction with staff who were pleasant and professional. My critique is on comfort of the seats. Exit rows and comfort seats do not provide enough personal space for 3 side-by-side seats, especially when in the middle row. Some passengers are not considerate of the middle seat and there should be signs that state something to the effect of: "please consider giving middle seats use of the armrests."

The tray table was broken and the food was terrible.

THEY FAILED ME AND I NEVER GOT ON THE FLIGHT BECAUSE IT WAS SO DELAYED! I ENDED UP HAVING TO PAY OUT OF POCKET FOR A HOTEL AND STAY IN NASHVILLE TO CATCH A FLIGHT FOR THE FOLLOWING DAY. DELTA IS POOR CUSTOMER SERVICE>

The staff on board and gate was nice - a welcome change from the usual. We also arrived early, which was a great benefit, given that it takes 30 minutes plus to get bags at SRQ.

Having to up charge for a seat assignment is not good. Delta can do better

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

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

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.

I wish there were outlets to charge my iPhone. The crew was great; we had a female pilot who was great with explaining what was happening and delays,

The staff was hospitable and professional. The seat had a bit of wear. The winner shade was stuck 1/4 open. I received the best of both worlds. The morning sun was able to come in and blind the screen i was trying to use while at the same time it was too low to look out and enjoy the view. Rather embarrassing for a 1st class ticket.

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

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Trip was great. A wild landing in Ottawa with the wind and rain, but the pilot did a great job. Always love flying United.👍

The internet service I paid for didn’t work at all and the flight crew was not very friendly.

The planes are so dirty! Food crumbs and finger print smudges, Dust over the vents and carpet stains. It’s disgusting.

Overall it was good. The flight was bumpy at times, but the pilot made us aware every time. As a result, no snacks/drinks were made available. Seats were tight but that’s okay as I had a window seat.

Not one thing to like. Three flights all with “mechanical” delays. Never got to where I was going and spent additional $500 for a hotel room. American Airlines is the worst in the industry!

Flight delays for communication overall not a good experience uncomfortable on the plane. Person in front of me reclined his seat, putting them inches from my lap.

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

the plane was so hot!! the air-conditioning was barely blowing. The flight was delayed, and we had to sit on the hot plane before take off for an extended amount of time, waiting on international passengers. Would not have been so bad if it was not so hot. They said it would get better after take off, but it did not.

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

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