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$137+ 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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — BOI
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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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 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$304
(United Airlines)

One-way from

$137
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$573
Provider with most accurate pricing for Knoxville McGhee Tyson-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Boise Air Term. Gowen Fld flights.
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From Knoxville McGhee Tyson to Idaho
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One-way flight from Knoxville McGhee Tyson to Idaho
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Highest demand for flights based on searches. 20% potential increase in price ($115 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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 3, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/1. 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 21mFrontier
Sat 1/312:02 pmGEG - TYS
1 stop24h 29mFrontier
Deal found 11/1$403
This Delta deal was found by Cheapflights users on 11/2. 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.
Thu 12/46:32 amTYS - BOI
1 stop9h 46mDelta
Thu 12/112:04 pmBOI - TYS
1 stop7h 24mDelta
Deal found 11/2$437
This Kiwi.com deal was found by Cheapflights users on 11/1. 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
2 stops20h 43mMultiple Airlines
Sat 1/312:02 pmGEG - TYS
1 stop24h 29mMultiple Airlines
Deal found 11/1$450
This Kiwi.com deal was found by Cheapflights users on 10/31. 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.
Thu 12/116:30 amTYS - GEG
1 stop7h 43mMultiple Airlines
Sat 12/2712:02 pmGEG - TYS
1 stop22h 09mMultiple Airlines
Deal found 10/31$463
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/294:46 pmTYS - GEG
1 stop21h 21mFrontier
Sat 1/312:02 pmGEG - TYS
1 stop24h 29mFrontier
Deal found 11/1$471
This Delta deal was found by Cheapflights users on 10/30. 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 11/16:40 amTYS - GEG
1 stop9h 25mDelta
Tue 11/42:17 pmGEG - TYS
1 stop5h 38mDelta
Deal found 10/30$505
This Delta deal was found by Cheapflights users on 10/31. 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 11/228:45 amTYS - GEG
2 stops14h 18mDelta
Fri 11/281:16 pmGEG - TYS
1 stop7h 25mDelta
Deal found 10/31$507
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/294:46 pmTYS - GEG
1 stop21h 21mMultiple Airlines
Sat 1/311:19 amGEG - TYS
2 stops32h 03mMultiple Airlines
Deal found 11/1$521
This Alaska Airlines deal was found by Cheapflights users on 10/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:24 amTYS - BOI
2 stops12h 52mAlaska Airlines
Thu 12/1112:19 pmBOI - TYS
2 stops20h 11mAlaska Airlines
Deal found 10/31$556
This American Airlines deal was found by Cheapflights users on 10/31. 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 11/18:09 amTYS - IDA
1 stop6h 15mAmerican Airlines
Tue 11/47:10 amIDA - TYS
2 stops13h 41mAmerican Airlines
Deal found 10/31$614
This Delta deal was found by Cheapflights users on 10/30. 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 11/17:45 amTYS - JAC
2 stops11h 03mDelta
Tue 11/41:00 pmJAC - TYS
2 stops8h 22mDelta
Deal found 10/30$649
This United Airlines deal was found by Cheapflights users on 10/31. 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 11/118:50 amTYS - JAC
1 stop8h 35mUnited Airlines
Fri 11/144:17 pmJAC - TYS
1 stop28h 13mUnited Airlines
Deal found 10/31$688

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 3, 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

Sun 1/4

6:30 am-11:43 am

1 stop7h 13m

Boise Air Term. Gowen Fld

Sun 1/11

12:54 pm-10:28 pm

2 stops31h 34m

$334

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Sat 2/21

6:45 am-2:09 pm

1 stop9h 24m

Boise Air Term. Gowen Fld

Tue 2/24

1:43 pm-11:44 pm

1 stop8h 01m

$389

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Mon 12/22

4:46 pm-11:07 am

1 stop21h 21m

Spokane

Sat 1/3

12:02 pm-3:31 pm

1 stop24h 29m

$403

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Mon 1/19

6:45 am-11:39 am

1 stop7h 54m

Spokane

Sat 1/24

11:25 am-9:02 pm

1 stop6h 37m

$413

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Wed 1/14

7:54 am-1:45 pm

1 stop7h 51m

Boise Air Term. Gowen Fld

Sun 1/18

1:58 pm-10:47 pm

1 stop6h 49m

$413

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Wed 1/14

4:25 pm-9:52 pm

1 stop7h 27m

Boise Air Term. Gowen Fld

Sun 1/18

6:10 am-9:02 pm

2 stops12h 52m

$418

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Fri 1/23

6:19 am-1:05 pm

1 stop9h 46m

Spokane

Mon 1/26

2:00 pm-11:09 pm

1 stop6h 09m

$437

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Thu 12/11

6:30 am-11:13 am

1 stop7h 43m

Spokane

Sat 12/27

12:02 pm-1:11 pm

1 stop22h 09m

$463

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Mon 12/29

4:46 pm-11:07 am

1 stop21h 21m

Spokane

Sat 1/3

12:02 pm-3:31 pm

1 stop24h 29m

$471

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Sat 11/22

8:45 am-8:03 pm

2 stops14h 18m

Spokane

Fri 11/28

1:16 pm-11:41 pm

1 stop7h 25m

$507

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 29 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 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 3, 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 3, 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
8,001 reviews

Food

7.3

Boarding

8.2

Overall

7.9

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
Delta
7.9
Good
8,001 reviews
Delta
7.9
Good
8,001 reviews

Food

7.3

Boarding

8.2

Overall

7.9

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
United Airlines
7.4
Good
8,997 reviews
Delta
7.9
Good
8,001 reviews

Food

7.3

Boarding

8.2

Overall

7.9

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
American Airlines
7.2
Good
11,034 reviews
Delta
7.9
Good
8,001 reviews

Food

7.3

Boarding

8.2

Overall

7.9

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.

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 7h 54m. Airlines will cover a distance of 1892 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 - Boise Air Term. Gowen Fld or Knoxville McGhee Tyson - Spokane 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

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Alternative routes for Knoxville to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$156Average$455FlexibilityNo cancel feeOn-time71%
DeltaCheapest$269Average$378FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$313Average$551FlexibilityNo cancel feeOn-time69%

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