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$120+ 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — BOI
Mar 26 — Apr 21
Wed 3/26
Wed 4/2
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 March 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$229
(Delta)

One-way from

$120
(United Airlines)

Popular in

December

Cheapest in

April

Average price

$479
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 ($130 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 21, 2025.

This Delta deal was found by Cheapflights users on 3/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/266:45 amTYS - GEG
1 stop9h 19mDelta
Sat 9/611:55 amGEG - TYS
1 stop8h 01mDelta
Deal found 3/20$229
This American Airlines deal was found by Cheapflights users on 3/20. 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.
Thu 8/215:22 amTYS - BOI
1 stop9h 18mAmerican Airlines
Tue 8/261:41 pmBOI - TYS
1 stop5h 56mAmerican Airlines
Deal found 3/20$259
This Delta deal was found by Cheapflights users on 3/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/216:05 pmTYS - BOI
1 stop7h 24mDelta
Tue 8/2610:30 amBOI - TYS
2 stops11h 17mDelta
Deal found 3/20$264
This American Airlines deal was found by Cheapflights users on 3/20. 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 4/24:16 pmTYS - GEG
2 stops9h 48mAmerican Airlines
Wed 4/236:27 amGEG - TYS
2 stops9h 52mAmerican Airlines
Deal found 3/20$339
This United Airlines deal was found by Cheapflights users on 3/20. 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.
Fri 4/44:31 pmTYS - BOI
1 stop8h 32mUnited Airlines
Tue 4/82:38 pmBOI - TYS
1 stop5h 52mUnited Airlines
Deal found 3/20$339
This United Airlines deal was found by Cheapflights users on 3/20. 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.
Fri 4/44:31 pmTYS - GEG
1 stop7h 19mUnited Airlines
Tue 4/86:15 amGEG - TYS
2 stops13h 15mUnited Airlines
Deal found 3/20$344
This American Airlines deal was found by Cheapflights users on 3/20. 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.
Mon 10/205:55 amTYS - JAC
1 stop8h 17mAmerican Airlines
Sat 10/252:07 pmJAC - TYS
1 stop7h 40mAmerican Airlines
Deal found 3/20$389
This United Airlines deal was found by Cheapflights users on 3/21. 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 4/55:45 amTYS - JAC
2 stops9h 32mUnited Airlines
Wed 4/97:00 amJAC - TYS
1 stop5h 44mUnited Airlines
Deal found 3/21$468
This Mytrip deal was found by Cheapflights users on 3/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/211:00 amTYS - GEG
1 stop24h 45mMultiple Airlines
Sun 4/69:30 amGEG - TYS
2 stops29h 00mMultiple Airlines
Deal found 3/20$542
This American Airlines deal was found by Cheapflights users on 3/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/165:20 amTYS - IDA
1 stop9h 09mAmerican Airlines
Sat 5/241:02 pmIDA - TYS
1 stop8h 56mAmerican Airlines
Deal found 3/21$562
This Delta deal was found by Cheapflights users on 3/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/112:00 pmTYS - JAC
2 stops10h 57mDelta
Fri 8/88:05 amJAC - TYS
1 stop8h 12mDelta
Deal found 3/20$589
This United Airlines deal was found by Cheapflights users on 3/20. 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.
Thu 4/38:45 amTYS - IDA
1 stop8h 36mUnited Airlines
Sat 9/1310:45 amIDA - TYS
2 stops9h 57mUnited Airlines
Deal found 3/20$600

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 March 21, 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

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Tue 8/26

6:45 am-1:04 pm

1 stop9h 19m

Spokane

Sat 9/6

11:55 am-10:56 pm

1 stop8h 01m

$229

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Thu 8/21

5:22 am-12:40 pm

1 stop9h 18m

Boise Air Term. Gowen Fld

Tue 8/26

1:41 pm-9:37 pm

1 stop5h 56m

$259

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Thu 8/21

6:05 pm-11:29 pm

1 stop7h 24m

Boise Air Term. Gowen Fld

Tue 8/26

10:30 am-11:47 pm

2 stops11h 17m

$264

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Fri 4/4

4:31 pm-11:03 pm

1 stop8h 32m

Boise Air Term. Gowen Fld

Tue 4/8

2:38 pm-10:30 pm

1 stop5h 52m

$339

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Wed 4/2

4:16 pm-11:04 pm

2 stops9h 48m

Spokane

Wed 4/23

6:27 am-7:19 pm

2 stops9h 52m

$339

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Fri 4/4

4:31 pm-8:50 pm

1 stop7h 19m

Spokane

Tue 4/8

6:15 am-10:30 pm

2 stops13h 15m

$344

KnoxvilleJackson

TYS - JAC

TYSJAC

Knoxville McGhee Tyson

Sat 4/5

5:45 am-1:17 pm

2 stops9h 32m

Jackson Hole

Wed 4/9

7:00 am-2:44 pm

1 stop5h 44m

$468

KnoxvilleJackson

TYS - JAC

TYSJAC

Knoxville McGhee Tyson

Thu 7/3

2:16 pm-8:53 pm

1 stop8h 37m

Jackson Hole

Tue 7/8

3:29 pm-11:41 pm

1 stop6h 12m

$506

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Wed 4/2

11:00 am-8:45 am

1 stop24h 45m

Spokane

Sun 4/6

9:30 am-5:30 pm

2 stops29h 00m

$542

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Fri 5/16

5:20 am-12:29 pm

1 stop9h 09m

Idaho Falls Fanning Field

Sat 5/24

1:02 pm-11:58 pm

1 stop8h 56m

$562

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Showing 1-10 of 17 results
1
2

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, October is the cheapest month in which you can book a flight from Knoxville to Idaho (average of $314). Flying from Knoxville to Idaho in June is currently the most expensive (average of $424). 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 March 21, 2025.

When flying from Knoxville to Idaho, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Idaho by month

Plan your trip to Idaho by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Idaho ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

Plan your trip to Idaho by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Idaho, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

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 March 21, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta and United Airlines from Knoxville to Idaho to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,759 reviews

Comfort

7.9

Overall

8.0

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,759 reviews
Alaska Airlines
8.0
Very good
9,759 reviews

Comfort

7.9

Overall

8.0

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,895 reviews
Alaska Airlines
8.0
Very good
9,759 reviews

Comfort

7.9

Overall

8.0

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,759 reviews

Comfort

7.9

Overall

8.0

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,759 reviews

Comfort

7.9

Overall

8.0

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

  • 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, October is the cheapest month in which you can book a flight from Knoxville to Idaho (average of $314). Flying from Knoxville to Idaho in June is currently the most expensive (average of $424). 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

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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 March 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$240Average$565FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$564FlexibilityNo cancel feeOn-time71%
DeltaCheapest$288Average$413FlexibilityNo cancel feeOn-timeN/A
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