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$238+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — BOI
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
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 June 30, 2025.

Round-trip from

$289
(American Airlines)

One-way from

$238
(Delta)

Popular in

December

Cheapest in

April

Average price

$380
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. 29% potential increase in price ($187 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 30, 2025.

This American Airlines deal was found by Cheapflights users on 6/28. 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 8/215:30 amTYS - BOI
1 stop9h 16mAmerican Airlines
Tue 8/267:00 amBOI - TYS
1 stop8h 49mAmerican Airlines
Deal found 6/28$289
This Delta deal was found by Cheapflights users on 6/29. 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 8/236:36 amTYS - BOI
1 stop9h 25mDelta
Tue 8/265:30 amBOI - TYS
1 stop8h 54mDelta
Deal found 6/29$354
This Mytrip deal was found by Cheapflights users on 6/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/107:00 amTYS - BOI
3 stops37h 52mMultiple Airlines
Fri 8/156:06 pmBOI - TYS
2 stops13h 58mMultiple Airlines
Deal found 6/30$370
This Alaska Airlines deal was found by Cheapflights users on 6/27. 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.
Tue 9/307:28 amTYS - BOI
1 stop7h 20mAlaska Airlines
Tue 10/141:41 pmBOI - TYS
1 stop8h 06mAlaska Airlines
Deal found 6/27$379

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 June 30, 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

Thu 8/21

5:30 am-12:46 pm

1 stop9h 16m

Boise Air Term. Gowen Fld

Tue 8/26

7:00 am-5:49 pm

1 stop8h 49m

$289

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Sat 8/23

6:36 am-2:01 pm

1 stop9h 25m

Boise Air Term. Gowen Fld

Tue 8/26

5:30 am-4:24 pm

1 stop8h 54m

$354

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Sun 8/10

7:00 am-6:52 pm

3 stops37h 52m

Boise Air Term. Gowen Fld

Fri 8/15

6:06 pm-10:04 am

2 stops13h 58m

$370

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Tue 9/30

7:28 am-12:48 pm

1 stop7h 20m

Boise Air Term. Gowen Fld

Tue 10/14

1:41 pm-11:47 pm

1 stop8h 06m

$379

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Sat 9/20

5:45 am-12:22 pm

1 stop8h 37m

$238

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Mon 10/6

4:40 pm-1:48 pm

2 stops23h 08m

$344

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Mon 10/6

2:36 pm-11:36 pm

2 stops11h 00m

$348

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

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 $398). 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.

How much does it cost to fly round-trip from Knoxville to Boise?

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 June 30, 2025.
Read through reviews of airlines operating flights from Knoxville to Boise, such as Alaska Airlines, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,969 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,852 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 $289. Other airlines that can offer you cheap pricing are Delta, from $354, and Alaska Airlines, from $379. American Airlines is 35% cheaper than the average price of flights available within the next 90 days to this destination.

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

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $238. United Airlines flights start at $344 while deals on American Airlines start at $348 one-way.

  • 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 $398). 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 Knoxville?

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

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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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$172Average$408FlexibilityNo cancel feeOn-time71%
DeltaCheapest$269Average$388FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$313Average$508FlexibilityNo cancel feeOn-time69%

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