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$200+ 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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — BOI
Jan 21 — Jan 281
Wed 1/21
Wed 1/28
1 adult, Economy
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Cheap 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 December 22, 2025.

This United Airlines deal was found by Cheapflights users on 12/21. 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.
Wed 12/244:04 pmTYS - GEG
1 stop7h 54mUnited Airlines
Tue 12/305:05 amGEG - TYS
1 stop6h 55mUnited Airlines
Deal found 12/21$447
This Kiwi.com deal was found by Cheapflights users on 12/21. 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.
Wed 12/241:58 pmTYS - GEG
2 stops28h 55mMultiple Airlines
Tue 12/3012:02 pmGEG - TYS
1 stop29h 37mMultiple Airlines
Deal found 12/21$482
This Kiwi.com deal was found by Cheapflights users on 12/20. 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.
Mon 12/224:46 pmTYS - GEG
1 stop21h 21mMultiple Airlines
Tue 12/3012:02 pmGEG - TYS
1 stop29h 37mMultiple Airlines
Deal found 12/20$546
This United Airlines deal was found by Cheapflights users on 12/20. 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.
Mon 12/227:00 amTYS - GEG
2 stops11h 19mUnited Airlines
Tue 12/305:05 amGEG - TYS
1 stop6h 55mUnited Airlines
Deal found 12/20$569
This United Airlines deal was found by Cheapflights users on 12/20. 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.
Wed 12/245:45 amTYS - JAC
2 stops9h 39mUnited Airlines
Fri 12/261:00 pmJAC - TYS
1 stop8h 42mUnited Airlines
Deal found 12/20$614
This Delta deal was found by Cheapflights users on 12/21. 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.
Wed 12/241:58 pmTYS - GEG
2 stops11h 06mDelta
Tue 12/306:00 amGEG - TYS
2 stops12h 15mDelta
Deal found 12/21$635
This American Airlines deal was found by Cheapflights users on 12/20. 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 12/205:08 pmTYS - GEG
1 stop22h 01mAmerican Airlines
Mon 12/296:07 amGEG - TYS
1 stop12h 22mAmerican Airlines
Deal found 12/20$642
This American Airlines deal was found by Cheapflights users on 12/20. 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.
Wed 12/2412:18 pmTYS - GEG
1 stop9h 17mAmerican Airlines
Tue 12/3011:59 pmGEG - TYS
1 stop8h 29mAmerican Airlines
Deal found 12/20$722
This United Airlines deal was found by Cheapflights users on 12/21. 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.
Sat 12/274:04 pmTYS - BOI
1 stop7h 22mUnited Airlines
Thu 1/16:15 amBOI - TYS
1 stop6h 45mUnited Airlines
Deal found 12/21$724
This American Airlines deal was found by Cheapflights users on 12/20. 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.
Wed 12/247:30 amTYS - JAC
1 stop6h 43mAmerican Airlines
Fri 12/2612:53 pmJAC - TYS
1 stop8h 52mAmerican Airlines
Deal found 12/20$729
This United Airlines deal was found by Cheapflights users on 12/21. 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 12/309:50 amTYS - BOI
2 stops14h 50mUnited Airlines
Thu 1/16:15 amBOI - TYS
1 stop6h 45mUnited Airlines
Deal found 12/21$749
This Delta deal was found by Cheapflights users on 12/21. 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.
Sat 12/276:25 amTYS - BOI
2 stops13h 14mDelta
Thu 1/15:30 amBOI - TYS
2 stops13h 02mDelta
Deal found 12/21$784

Find flight deals from Knoxville to Idaho

Keep the following information in mind while searching for Knoxville to Idaho flight deals. Data was last updated December 22, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$283
(American Airlines)

One-way from

$200
(Southwest)

Popular in

December

Cheapest in

April

Average price

$908
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. 25% potential increase in price ($158 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 22, 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

KnoxvilleJackson

TYS - JAC

TYSJAC

Knoxville McGhee Tyson

Tue 2/10

6:00 am-1:02 pm

1 stop9h 02m

Jackson Hole

Sat 2/14

1:29 pm-11:54 pm

2 stops8h 25m

$283

KnoxvilleJackson

TYS - JAC

TYSJAC

Knoxville McGhee Tyson

Tue 2/10

11:10 am-8:42 pm

2 stops11h 32m

Jackson Hole

Sat 2/14

1:05 pm-11:44 pm

1 stop8h 39m

$294

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Tue 1/20

6:30 am-1:03 pm

1 stop9h 33m

Spokane

Tue 1/27

12:55 pm-11:45 pm

1 stop7h 50m

$321

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Tue 1/20

6:30 am-1:34 pm

1 stop9h 04m

Boise Air Term. Gowen Fld

Tue 1/27

3:03 pm-11:09 pm

1 stop6h 06m

$321

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Tue 1/20

11:10 am-9:22 pm

2 stops13h 12m

Spokane

Tue 1/27

5:00 am-7:27 pm

2 stops11h 27m

$331

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Thu 2/19

5:35 am-11:35 am

1 stop9h 00m

Spokane

Wed 2/25

9:25 am-11:12 pm

2 stops10h 47m

$345

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Thu 2/19

5:35 am-11:35 am

1 stop9h 00m

Spokane

Sat 2/21

2:05 pm-11:12 pm

1 stop6h 07m

$359

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Sat 2/14

6:35 am-1:08 pm

1 stop9h 33m

Spokane

Sat 2/21

2:05 pm-11:12 pm

1 stop6h 07m

$359

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Sat 2/14

5:35 am-1:44 pm

2 stops10h 09m

Boise Air Term. Gowen Fld

Sat 2/21

6:41 am-9:39 pm

2 stops12h 58m

$369

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Sun 1/18

10:00 am-9:58 am

1 stop26h 58m

Spokane

Sun 1/25

12:03 pm-3:35 pm

1 stop24h 32m

$384

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

Showing 1-10 of 28 results
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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 December is currently the most expensive (average of $320). 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.

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 December 22, 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
8,014 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.3

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
8,014 reviews
Delta
7.9
Good
8,014 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.3

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
9,102 reviews
Delta
7.9
Good
8,014 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.3

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
11,052 reviews
Delta
7.9
Good
8,014 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.1

Crew

8.5

Overall

7.9

Food

7.3

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 9h 02m. Airlines will cover a distance of 1511 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 - Spokane or Knoxville McGhee Tyson - Boise Air Term. Gowen Fld 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 December is currently the most expensive (average of $320). 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

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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 December 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$156Average$472FlexibilityNo cancel feeOn-time71%
DeltaCheapest$269Average$377FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$313Average$541FlexibilityNo cancel feeOn-time69%

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