HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$180+ Cheap flights from Knoxville (TYS) to Idaho

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — BOI
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Knoxville to Idaho with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Knoxville to Idaho

Keep the following information in mind while searching for Knoxville to Idaho flight deals. Data was last updated November 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$294
(Kiwi.com)

One-way from

$180
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$558
Provider with most accurate pricing for Knoxville McGhee Tyson-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Boise Air Term. Gowen Fld flights.
Search Deals
From Knoxville McGhee Tyson to Idaho
Search Deals
One-way flight from Knoxville McGhee Tyson to Idaho
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($133 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from Knoxville to Idaho

Cheapest flights from Knoxville to Idaho
Explore the most affordable flight options available from Knoxville to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/218:30 amTYS - BOI
1 stop9h 22mMultiple Airlines
Fri 11/2812:48 pmBOI - TYS
1 stop28h 22mMultiple Airlines
Deal found 11/14$461
This American Airlines deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:29 pmTYS - GEG
1 stop21h 01mAmerican Airlines
Sun 12/71:14 pmGEG - TYS
1 stop20h 30mAmerican Airlines
Deal found 11/15$462
This United Airlines deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/54:30 pmTYS - JAC
1 stop6h 07mUnited Airlines
Sun 12/72:49 pmJAC - TYS
1 stop5h 41mUnited Airlines
Deal found 11/15$473
This American Airlines deal was found by Cheapflights users on 11/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:29 pmTYS - GEG
1 stop7h 09mAmerican Airlines
Mon 12/296:07 amGEG - TYS
1 stop12h 22mAmerican Airlines
Deal found 11/16$495
This Delta deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:40 amTYS - GEG
2 stops9h 49mDelta
Fri 12/122:15 pmGEG - TYS
1 stop6h 03mDelta
Deal found 11/15$502
This American Airlines deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/25:52 pmTYS - GEG
1 stop21h 38mAmerican Airlines
Sat 12/61:14 pmGEG - TYS
1 stop20h 30mAmerican Airlines
Deal found 11/17$513
This United Airlines deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/58:50 amTYS - GEG
1 stop6h 55mUnited Airlines
Sun 12/75:25 amGEG - TYS
2 stops11h 04mUnited Airlines
Deal found 11/15$532
This United Airlines deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/24:30 pmTYS - GEG
1 stop7h 29mUnited Airlines
Sat 12/65:00 amGEG - TYS
2 stops13h 04mUnited Airlines
Deal found 11/17$536
This Delta deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/25:40 amTYS - GEG
2 stops9h 30mDelta
Sat 12/66:00 amGEG - TYS
2 stops11h 00mDelta
Deal found 11/17$541
This American Airlines deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:29 pmTYS - GEG
1 stop7h 09mAmerican Airlines
Fri 12/266:07 amGEG - TYS
1 stop12h 14mAmerican Airlines
Deal found 11/17$553
This United Airlines deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:25 pmTYS - JAC
2 stops16h 20mUnited Airlines
Sat 12/67:00 amJAC - TYS
1 stop6h 07mUnited Airlines
Deal found 11/17$573
This American Airlines deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/44:22 pmTYS - BOI
1 stop7h 41mAmerican Airlines
Thu 12/111:25 pmBOI - TYS
1 stop8h 25mAmerican Airlines
Deal found 11/15$588

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to Idaho that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 17, 2025.
Use the filters below to find and compare flights from Knoxville to Idaho that are best for you.

Fly from

Knoxville

Fly to

Idaho

Route

Depart

Return

Price

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Thu 2/19

5:30 am-12:31 pm

1 stop9h 01m

Boise Air Term. Gowen Fld

Wed 2/25

3:03 pm-11:14 pm

1 stop6h 11m

$389

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Tue 2/10

5:40 am-12:30 pm

1 stop8h 50m

Boise Air Term. Gowen Fld

Tue 2/24

3:00 pm-11:14 pm

1 stop6h 14m

$389

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Fri 2/20

5:30 am-12:31 pm

1 stop9h 01m

Boise Air Term. Gowen Fld

Tue 2/24

11:19 am-11:14 pm

2 stops9h 55m

$394

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Wed 2/11

11:58 am-8:55 pm

2 stops10h 57m

Boise Air Term. Gowen Fld

Tue 2/24

7:30 am-11:14 pm

2 stops13h 44m

$399

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Sun 1/4

5:08 pm-9:28 pm

1 stop7h 20m

Spokane

Sat 1/10

6:00 am-5:42 pm

1 stop8h 42m

$413

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Thu 2/12

6:20 am-2:01 pm

1 stop9h 41m

Boise Air Term. Gowen Fld

Sun 2/15

1:41 pm-11:50 pm

1 stop8h 09m

$413

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Fri 2/13

6:20 am-4:05 pm

2 stops11h 45m

Boise Air Term. Gowen Fld

Tue 2/24

3:00 pm-11:14 pm

1 stop6h 14m

$418

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Wed 2/11

11:58 am-8:55 pm

2 stops10h 57m

Boise Air Term. Gowen Fld

Fri 2/20

3:00 pm-11:14 pm

1 stop6h 14m

$418

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Thu 4/30

8:45 am-1:29 pm

1 stop6h 44m

Idaho Falls Fanning Field

Sun 5/3

2:35 pm-10:23 pm

1 stop5h 48m

$419

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Sat 2/14

5:30 am-1:36 pm

2 stops10h 06m

Boise Air Term. Gowen Fld

Mon 2/23

6:14 pm-9:06 am

2 stops12h 52m

$423

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/17

Showing 1-10 of 49 results
1
2
3
...
5

Best time to book a flight from Knoxville to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Knoxville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Knoxville to Idaho

What is the cheapest month to book a flight from Knoxville to Idaho?

Currently, April is the cheapest month in which you can book a flight from Knoxville to Idaho (average of $156). Flying from Knoxville to Idaho in June is currently the most expensive (average of $301). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from TYS to ID?

Find hourly flight availability from Knoxville to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 17, 2025.

When flying from Knoxville to Idaho, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 18% versus a flight in the afternoon.

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated November 17, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Knoxville to Idaho have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,008 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,014 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,048 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Entertainment

7.9

Overall

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Knoxville to Idaho?

    Knoxville McGhee Tyson (TYS), located 11.3 mi from the city center, is the airport you fly out of when you book flights from Knoxville to Idaho.

  • How long is the flight from Knoxville to Idaho?

    Departing from Knoxville to Idaho will take you 6h 44m. Airlines will cover a distance of 1575 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Knoxville to Idaho one-way?

    The cheapest airline one-way is Allegiant Air, with whom users have recently found tickets for as low as $180. However, be on the lookout for offers from Delta and Southwest, as they are both options that can get you from Knoxville to Idaho for a low price.

  • What are the most popular routes from Knoxville to Idaho?

    When deciding which route to take from Knoxville to Idaho consider Knoxville McGhee Tyson - Jackson Hole, Knoxville McGhee Tyson - Boise Air Term. Gowen Fld or Knoxville McGhee Tyson - Idaho Falls Fanning Field as they are the most popular.

  • Can I find deals for flights from Knoxville to Idaho that include hotel bookings?

    Yes. In addition to deals on Knoxville to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Knoxville to Idaho?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Knoxville to Idaho.

  • Can I find deals for business class flights from Knoxville to Idaho?

    Yes. Cheapflights offers flight deals from Knoxville to Idaho by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Knoxville to Idaho?

    Currently, April is the cheapest month in which you can book a flight from Knoxville to Idaho (average of $156). Flying from Knoxville to Idaho in June is currently the most expensive (average of $301). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Knoxville to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Nashville to LaGuardia flights
Nashville to John F Kennedy Intl flights
Nashville to Newark flights
Memphis to LaGuardia flights
Nashville to Orlando flights
Nashville to Las Vegas flights
Nashville to Los Angeles flights
Nashville to Denver flights
Nashville to Dallas/Fort Worth flights
Chattanooga to LaGuardia flights
Memphis to John F Kennedy Intl flights
Nashville to Seattle flights
Nashville to Fort Lauderdale flights
Nashville to Sky Harbor Intl flights
Nashville to Miami flights
Nashville to Hobby flights
Nashville to O'Hare Intl flights
Knoxville to LaGuardia flights
Memphis to O'Hare Intl flights
Chattanooga to John F Kennedy Intl flights
Nashville to Salt Lake City flights
Memphis to Hobby flights
Memphis to Los Angeles flights
Nashville to Boston flights
Memphis to Newark flights
Memphis to Denver flights
Nashville to George Bush Intcntl flights
Nashville to Dulles Intl flights
Knoxville to O'Hare Intl flights
Memphis to Atlanta flights
Nashville to Reagan-National flights
Memphis to Las Vegas flights
Knoxville to John F Kennedy Intl flights
Memphis to Miami flights
Chattanooga to Newark flights
Nashville to Tampa flights
Nashville to San Francisco flights
Memphis to George Bush Intcntl flights
Memphis to Orlando flights
Nashville to Honolulu flights
Memphis to Reagan-National flights
Knoxville to Hobby flights
Memphis to Dulles Intl flights
Nashville to Baltimore flights
Knoxville to Denver flights
Knoxville to Dallas/Fort Worth flights
Knoxville to Newark flights
Nashville to San Diego flights
Nashville to New Orleans flights
Knoxville to George Bush Intcntl flights

Top 3 airlines flying from Knoxville to Idaho

Discover the top 3 airlines that operate flights from Knoxville to Idaho. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$156Average$455FlexibilityNo cancel feeOn-time71%
DeltaCheapest$269Average$378FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$313Average$551FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.