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$189+ Cheap flights from Knoxville to Boise (TYS - BOI)

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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — BOI
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
1 adult, Economy
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Cheap flight deals from Knoxville to Boise

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Boise (BOI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated agosto 14, 2025.

Round-trip from

$289
(Delta)

One-way from

$189
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$378
From Knoxville McGhee Tyson to Boise Air Term. Gowen Fld
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One-way flight from Knoxville McGhee Tyson to Boise Air Term. Gowen Fld
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Highest demand for flights based on searches. 27% potential increase in price ($178 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 August 2025
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Find flight deals from Knoxville to Boise

Cheapest flights from Knoxville to Boise
Explore the most affordable flight options available from Knoxville to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 14, 2025.

This Delta deal was found by Cheapflights users on 8/13. 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.
jue. 9/256:00 pmTYS - BOI
1 stop7h 59mDelta
mar. 9/303:20 pmBOI - TYS
1 stop6h 16mDelta
Deal found 8/13$289
This Delta deal was found by Cheapflights users on 8/13. 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.
sáb. 9/205:45 amTYS - BOI
2 stops10h 30mDelta
jue. 9/2511:35 pmBOI - TYS
1 stop8h 09mDelta
Deal found 8/13$294
This Delta deal was found by Cheapflights users on 8/12. 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.
mié. 9/105:45 amTYS - BOI
2 stops10h 16mDelta
dom. 9/1411:35 pmBOI - TYS
2 stops10h 06mDelta
Deal found 8/12$299
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
vie. 9/191:32 pmTYS - BOI
1 stop8h 59mMultiple Airlines
jue. 9/252:16 pmBOI - TYS
1 stop30h 14mMultiple Airlines
Deal found 8/13$300
This Delta deal was found by Cheapflights users on 8/13. 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.
jue. 9/256:00 pmTYS - BOI
1 stop7h 59mDelta
sáb. 9/271:40 pmBOI - TYS
1 stop8h 04mDelta
Deal found 8/13$314
This Delta deal was found by Cheapflights users on 8/13. 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.
sáb. 9/205:45 amTYS - BOI
2 stops10h 30mDelta
sáb. 9/271:40 pmBOI - TYS
1 stop8h 04mDelta
Deal found 8/13$319
This Delta deal was found by Cheapflights users on 8/13. 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.
sáb. 9/205:45 amTYS - BOI
2 stops10h 30mDelta
mar. 9/305:25 amBOI - TYS
2 stops9h 38mDelta
Deal found 8/13$324
This Mytrip deal was found by Cheapflights users on 8/11. 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.
vie. 9/51:32 pmTYS - BOI
1 stop8h 59mMultiple Airlines
dom. 9/72:16 pmBOI - TYS
2 stops27h 26mMultiple Airlines
Deal found 8/11$326
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
vie. 9/191:32 pmTYS - BOI
1 stop8h 59mMultiple Airlines
sáb. 9/272:16 pmBOI - TYS
1 stop23h 44mMultiple Airlines
Deal found 8/13$335
This American Airlines deal was found by Cheapflights users on 8/12. 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.
mié. 8/277:55 amTYS - BOI
1 stop6h 34mAmerican Airlines
dom. 8/317:00 amBOI - TYS
1 stop8h 49mAmerican Airlines
Deal found 8/12$339

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to Boise 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 agosto 14, 2025.
Use the filters below to find and compare flights from Knoxville to Boise that are best for you.

Fly from

Knoxville

Fly to

Boise

Route

Depart

Return

Price

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

jue. 9/25

6:00 pm-11:59 pm

1 stop7h 59m

Boise Air Term. Gowen Fld

mar. 9/30

3:20 pm-11:36 pm

1 stop6h 16m

$289

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

sáb. 9/27

6:00 am-12:48 pm

1 stop8h 48m

Boise Air Term. Gowen Fld

sáb. 10/4

1:38 pm-12:21 am

1 stop8h 43m

$289

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

mié. 9/10

6:36 am-2:01 pm

1 stop9h 25m

Boise Air Term. Gowen Fld

dom. 9/14

11:35 pm-11:41 am

2 stops10h 06m

$294

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

sáb. 9/20

7:14 am-12:27 pm

1 stop7h 13m

Boise Air Term. Gowen Fld

sáb. 9/27

1:57 pm-12:21 am

2 stops8h 24m

$294

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

sáb. 9/20

5:45 am-2:15 pm

2 stops10h 30m

Boise Air Term. Gowen Fld

jue. 9/25

11:35 pm-9:44 am

1 stop8h 09m

$294

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

sáb. 9/20

5:45 am-2:15 pm

2 stops10h 30m

Boise Air Term. Gowen Fld

vie. 9/26

11:35 pm-10:25 am

1 stop8h 50m

$294

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

sáb. 9/20

5:45 am-2:15 pm

2 stops10h 30m

Boise Air Term. Gowen Fld

mar. 9/30

3:20 pm-11:36 pm

1 stop6h 16m

$294

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

mié. 9/24

5:45 am-2:15 pm

2 stops10h 30m

Boise Air Term. Gowen Fld

mar. 9/30

3:20 pm-11:36 pm

1 stop6h 16m

$294

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

mar. 9/23

5:45 am-2:15 pm

2 stops10h 30m

Boise Air Term. Gowen Fld

mar. 9/30

3:20 pm-11:36 pm

1 stop6h 16m

$294

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

mié. 9/10

4:00 pm-1:21 pm

2 stops23h 21m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 16 results
1
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Best time to book a flight from Knoxville to Boise

Have a flexible travel schedule? Discover the best time to fly to Boise 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 Boise

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

Currently, October is the cheapest month in which you can book a flight from Knoxville to Boise (average of $314). Flying from Knoxville to Boise in June is currently the most expensive (average of $399). 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 Boise

Get insights into the airlines that provide service to Boise. 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 Boise. Reviews last updated agosto 14, 2025.
Read through reviews of airlines operating flights from Knoxville to Boise, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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

  • What are the cheapest airlines flying from Knoxville to Boise round-trip?

    Cheapflights users have booked flights from Knoxville to Boise round-trip from $172. Other airlines that can offer you cheap pricing are Delta, from $269, and United Airlines, from $313. American Airlines is 62% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Knoxville to Boise 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 Boise?

    Currently, October is the cheapest month in which you can book a flight from Knoxville to Boise (average of $314). Flying from Knoxville to Boise in June is currently the most expensive (average of $399). 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

Traveling to a place near Boise?

Book flights to Boise if you plan to visit one of these locations
Ontario
Meridian
Nampa
Caldwell
McCall

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Top 3 airlines flying from Knoxville to Boise

Discover the top 3 airlines that operate flights from Knoxville to Boise. 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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$172Average$388FlexibilityNo cancel feeOn-time71%
DeltaCheapest$269Average$386FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$313Average$508FlexibilityNo cancel feeOn-time69%

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