TYS - BOI

$235 Find Cheap Flights from Knoxville to Boise - 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 Boise departing on 9/4. 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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Everything you should know

Cheapest round-trip
$296
Typical prices: $478-$558
Multiple Airlines
Sun 11/1Thu 11/12
TYS - BOI • 1 stop
Cheapest one-way
$235
Typical prices: $239-$379
Southwest
Fri 9/4
TYS - BOI • 2 stops
Top airlines
Cheapest • from $311 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Knoxville and Boise. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $436 (round-trip)
Shortest trip • 6h 41m (one-way)
Insights
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Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
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Good to know
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Knoxville to Boise (TYS-BOI)

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

Sun, Nov 1 - Thu, Nov 12
Multiple Airlines Logo
9:29 pm - 2:57 pmTYS  Knoxville McGhee Tyson-BOI Boise Air Term. Gowen Fld
19h 28m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
3:52 pm - 10:35 pmBOI  Boise Air Term. Gowen Fld-TYS Knoxville McGhee Tyson
28h 43m1 stop Las Vegas Harry Reid Intl
$296Multiple Airlines
Sat, Sep 5 - Fri, Sep 11
American Airlines Logo
7:59 am - 2:02 pmTYS  Knoxville McGhee Tyson-BOI Boise Air Term. Gowen Fld
8h 03m1 stop Chicago O'Hare Intl
American Airlines Logo
1:50 pm - 11:22 pmBOI  Boise Air Term. Gowen Fld-TYS Knoxville McGhee Tyson
7h 32m1 stop Dallas/Fort Worth
$311American Airlines
Sat, Sep 5 - Sat, Sep 12
United Airlines Logo
7:00 am - 11:28 amTYS  Knoxville McGhee Tyson-BOI Boise Air Term. Gowen Fld
6h 28m1 stop Chicago O'Hare Intl
United Airlines Logo
2:41 pm - 10:44 pmBOI  Boise Air Term. Gowen Fld-TYS Knoxville McGhee Tyson
6h 03m1 stop Denver Intl
$329United Airlines
Sat, Sep 5 - Sat, Sep 12
American Airlines Logo
1:53 pm - 10:40 pmTYS  Knoxville McGhee Tyson-BOI Boise Air Term. Gowen Fld
10h 47m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
American Airlines Logo
1:50 pm - 11:22 pmBOI  Boise Air Term. Gowen Fld-TYS Knoxville McGhee Tyson
7h 32m1 stop Dallas/Fort Worth
$334American Airlines
Sun, Nov 1 - Thu, Nov 12
Multiple Airlines Logo
6:30 am - 2:57 pmTYS  Knoxville McGhee Tyson-BOI Boise Air Term. Gowen Fld
34h 27m2 stops Denver Intl Las Vegas Harry Reid Intl
Multiple Airlines Logo
3:52 pm - 10:35 pmBOI  Boise Air Term. Gowen Fld-TYS Knoxville McGhee Tyson
28h 43m1 stop Las Vegas Harry Reid Intl
$335Multiple Airlines
Sat, Aug 29 - Thu, Sep 10
Delta Logo
6:00 am - 12:49 pmTYS  Knoxville McGhee Tyson-BOI Boise Air Term. Gowen Fld
8h 49m1 stop Atlanta Hartsfield-Jackson
Delta Logo
2:11 pm - 10:27 pmBOI  Boise Air Term. Gowen Fld-TYS Knoxville McGhee Tyson
6h 16m1 stop Atlanta Hartsfield-Jackson
$347Delta
Thu, Sep 3 - Thu, Sep 10
Delta Logo
4:38 pm - 9:57 pmTYS  Knoxville McGhee Tyson-BOI Boise Air Term. Gowen Fld
7h 19m1 stop Atlanta Hartsfield-Jackson
Delta Logo
2:11 pm - 10:27 pmBOI  Boise Air Term. Gowen Fld-TYS Knoxville McGhee Tyson
6h 16m1 stop Atlanta Hartsfield-Jackson
$347Delta
Sat, Sep 5 - Fri, Sep 11
Southwest Logo
1:55 pm - 9:35 pmTYS  Knoxville McGhee Tyson-BOI Boise Air Term. Gowen Fld
9h 40m1 stop Denver Intl
Southwest Logo
6:00 am - 6:40 pmBOI  Boise Air Term. Gowen Fld-TYS Knoxville McGhee Tyson
10h 40m2 stops Las Vegas Harry Reid Intl Nashville Intl
$370Southwest
Mon, Aug 31 - Wed, Sep 9
United Airlines Logo
4:50 pm - 9:37 pmTYS  Knoxville McGhee Tyson-BOI Boise Air Term. Gowen Fld
6h 47m1 stop Denver Intl
United Airlines Logo
10:31 am - 10:49 pmBOI  Boise Air Term. Gowen Fld-TYS Knoxville McGhee Tyson
10h 18m2 stops Denver Intl Chicago O'Hare Intl
$376United Airlines
Sat, Sep 5 - Sat, Sep 12
American Airlines Logo
1:53 pm - 10:40 pmTYS  Knoxville McGhee Tyson-BOI Boise Air Term. Gowen Fld
10h 47m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
American Airlines Logo
8:05 am - 11:22 pmBOI  Boise Air Term. Gowen Fld-TYS Knoxville McGhee Tyson
13h 17m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth
$381American Airlines
Booking Insights

KAYAK's insights & trends for Knoxville to Boise flights

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

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 Boise departing in November.

Flight prices are below average for this route right now.

Flights to Boise from Knoxville usually cost between $378 and $500 in November.
The lowest price found in the past 5 days was $296 on Multiple Airlines (Nov 1-Nov 12).

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

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

Good to know

Low season

April

Cheapest flight

$235
Best time to beat the crowds with an average 35% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Knoxville to Boise

When to book flights from Knoxville to Boise

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

  • What is the cheapest flight from Knoxville to Boise?

    In the last 5 days, the lowest price for a flight from Knoxville to Boise was $235 for a one-way ticket and $296 for a round-trip.

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

    No

  • Which airports will I be using when flying from Knoxville to Boise?

    On your way to Boise, you’ll fly out from Knoxville McGhee Tyson. You’ll be landing at Boise Air Term. Gowen Fld.

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

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Knoxville to Boise?

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

  • Which is the best airline for flights from Knoxville to Boise, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Knoxville to Boise are Delta and United Airlines. With an average price for the route of $566 and an overall rating of 7.8, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $558 and an overall rating of 7.4.

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

    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 Boise.

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

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

    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 Boise with an airline and back to Knoxville with another airline. Booking your flights between Knoxville and BOI 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 Boise?

    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 Boise from Knoxville 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 Boise

 
See real verified KAYAK customer reviews for airlines flying from Knoxville to Boise. 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 Boise? 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 8499 reviews
7.8Entertainment
8.5Crew
7.2Food
8.1Boarding
7.8Comfort
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
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.

They lost my bag on both the going and return flight of my round-trip.

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

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

Information on your arrival and departure airports