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$180+ 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — BOI
Mar 24 — Mar 311
Tue 3/24
Tue 3/31
1 adult, Economy
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Cheap 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 February 22, 2026.

This United Airlines deal was found by Cheapflights users on 2/19. 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 4/17:00 am
TYS
-
BOI
1 stop6h 49m
United Airlines
Wed 4/85:00 am
BOI
-
TYS
1 stop8h 06m
United Airlines
Deal found 2/19$359
This Delta deal was found by Cheapflights users on 2/19. 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 4/16:35 am
TYS
-
BOI
2 stops11h 28m
Delta
Wed 4/811:40 pm
BOI
-
TYS
1 stop7h 36m
Delta
Deal found 2/19$364
This Delta deal was found by Cheapflights users on 2/19. 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 4/25:10 pm
TYS
-
BOI
1 stop7h 25m
Delta
Tue 4/71:40 pm
BOI
-
TYS
1 stop8h 17m
Delta
Deal found 2/19$372
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:05 am
TYS
-
BOI
2 stops10h 20m
Southwest
Sat 5/911:00 am
BOI
-
TYS
1 stop6h 35m
Southwest
Deal found 2/19$377
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/112:30 pm
TYS
-
BOI
2 stops11h 50m
Southwest
Wed 4/86:00 am
BOI
-
TYS
2 stops11h 40m
Southwest
Deal found 2/19$382
This Delta deal was found by Cheapflights users on 2/19. 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 4/25:10 pm
TYS
-
BOI
1 stop7h 25m
Delta
Mon 4/611:40 pm
BOI
-
TYS
1 stop7h 36m
Delta
Deal found 2/19$385
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:55 pm
TYS
-
BOI
2 stops11h 30m
Southwest
Wed 5/66:00 am
BOI
-
TYS
2 stops11h 40m
Southwest
Deal found 2/19$388
This United Airlines deal was found by Cheapflights users on 2/19. 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 4/297:00 am
TYS
-
BOI
1 stop6h 49m
United Airlines
Wed 5/62:33 pm
BOI
-
TYS
1 stop5h 50m
United Airlines
Deal found 2/19$389
This Delta deal was found by Cheapflights users on 2/19. 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 5/15:24 pm
TYS
-
BOI
2 stops8h 33m
Delta
Tue 5/122:25 pm
BOI
-
TYS
1 stop6h 32m
Delta
Deal found 2/19$403
This Delta deal was found by Cheapflights users on 2/19. 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 5/15:24 pm
TYS
-
BOI
2 stops8h 33m
Delta
Tue 5/58:59 am
BOI
-
TYS
2 stops12h 00m
Delta
Deal found 2/19$408
This Delta deal was found by Cheapflights users on 2/19. 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 4/25:10 pm
TYS
-
BOI
1 stop7h 25m
Delta
Wed 4/811:40 pm
BOI
-
TYS
1 stop7h 36m
Delta
Deal found 2/19$411

Find 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 February 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$359
(United Airlines)

One-way from

$180
(American Airlines)

Popular in

December

Cheapest in

April

Average price

$456
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 Boise Air Term. Gowen Fld
Search Deals
One-way flight from Knoxville McGhee Tyson to Boise Air Term. Gowen Fld
Search Deals
Highest demand for flights based on searches. 30% potential increase in price ($197 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 22, 2026.
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

Fri 4/17

2:45 pm-11:30 pm

2 stops10h 45m

Boise Air Term. Gowen Fld

Tue 4/21

5:15 pm-12:00 pm

2 stops16h 45m

$430

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Fri 5/1

5:24 pm-11:57 pm

2 stops8h 33m

Boise Air Term. Gowen Fld

Tue 5/12

6:08 pm-10:11 am

2 stops14h 03m

$441

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Wed 4/1

6:35 am-4:03 pm

2 stops11h 28m

Boise Air Term. Gowen Fld

Sun 4/5

11:40 pm-9:16 am

1 stop7h 36m

$442

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Sat 5/2

5:40 am-2:26 pm

2 stops10h 46m

Boise Air Term. Gowen Fld

Tue 5/12

2:25 pm-10:57 pm

1 stop6h 32m

$444

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Sat 4/25

5:40 am-2:26 pm

2 stops10h 46m

Boise Air Term. Gowen Fld

Fri 5/8

11:39 pm-2:13 pm

2 stops12h 34m

$447

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Thu 6/11

6:40 am-2:45 pm

2 stops10h 05m

Boise Air Term. Gowen Fld

Mon 6/15

10:25 am-7:10 pm

1 stop6h 45m

$452

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Sat 4/4

4:30 pm-9:34 pm

1 stop7h 04m

Boise Air Term. Gowen Fld

Tue 4/7

5:00 am-3:06 pm

1 stop8h 06m

$462

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Thu 4/2

5:10 pm-10:35 pm

1 stop7h 25m

Boise Air Term. Gowen Fld

Tue 4/7

11:40 pm-4:43 pm

2 stops15h 03m

$470

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Sat 5/2

5:40 am-2:26 pm

2 stops10h 46m

Boise Air Term. Gowen Fld

Fri 5/8

11:39 pm-9:27 am

1 stop7h 48m

$483

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Wed 5/20

2:55 pm-12:25 am

2 stops11h 30m

Boise Air Term. Gowen Fld

Wed 5/27

6:00 am-7:40 pm

2 stops11h 40m

$487

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 21 results
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Compare providers for flights from Knoxville to Boise

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Boise in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Knoxville-Boise flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Boise flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Boise flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-Boise flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Knoxville-Boise flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, April is the cheapest month in which you can book a flight from Knoxville to Boise (average of $156). Flying from Knoxville to Boise in February is currently the most expensive (average of $375). 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 February 22, 2026.
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
7.9
Good
8,241 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Boarding

8.1

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
8,241 reviews
Delta
7.9
Good
8,241 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Boarding

8.1

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
9,341 reviews
Delta
7.9
Good
8,241 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Boarding

8.1

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
11,338 reviews
Delta
7.9
Good
8,241 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Entertainment

7.8

Food

7.2

Boarding

8.1

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 Boise. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Knoxville to Boise?

    For as low as $414, United Airlines can have you in Boise from Knoxville in 11h 25m. Knoxville and Boise are separated by a distance of 1782 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Cheapflights users have booked flights from Knoxville to Boise round-trip from $156. Other airlines that can offer you cheap pricing are Delta, from $239, and United Airlines, from $419. American Airlines is 66% 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, April is the cheapest month in which you can book a flight from Knoxville to Boise (average of $156). Flying from Knoxville to Boise in February is currently the most expensive (average of $375). 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

Browse thousands of different options on Cheapflights for your next trip

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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 February 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$156Average$376FlexibilityNo cancel feeOn-time71%
DeltaCheapest$239Average$374FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$419Average$558FlexibilityNo cancel feeOn-time69%

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