HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$115+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — BOI
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Knoxville to Idaho with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$229
(Delta)

One-way from

$115
(American 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.
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 Idaho
Search Deals
One-way flight from Knoxville McGhee Tyson to Idaho
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($130 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

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 28, 2025.

This Delta deal was found by Cheapflights users on 3/26. 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 5/65:30 amTYS - GEG
1 stop9h 13mDelta
Thu 5/2911:22 pmGEG - TYS
1 stop7h 18mDelta
Deal found 3/26$229
This United Airlines deal was found by Cheapflights users on 3/26. 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 5/64:14 pmTYS - GEG
1 stop7h 41mUnited Airlines
Wed 5/286:25 pmGEG - TYS
2 stops13h 02mUnited Airlines
Deal found 3/26$234
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/265:24 amTYS - IDA
1 stop9h 05mAmerican Airlines
Tue 4/297:43 amIDA - TYS
2 stops14h 02mAmerican Airlines
Deal found 3/27$294
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/217:57 amTYS - BOI
1 stop6h 30mAmerican Airlines
Tue 8/261:41 pmBOI - TYS
1 stop5h 56mAmerican Airlines
Deal found 3/27$314
This United Airlines deal was found by Cheapflights users on 3/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/114:31 pmTYS - BOI
1 stop8h 32mUnited Airlines
Tue 4/152:38 pmBOI - TYS
1 stop5h 52mUnited Airlines
Deal found 3/27$339
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1612:55 pmTYS - IDA
2 stops12h 01mDelta
Sat 4/191:10 pmIDA - TYS
2 stops8h 38mDelta
Deal found 3/27$384
This United Airlines deal was found by Cheapflights users on 3/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/265:45 amTYS - IDA
2 stops9h 43mUnited Airlines
Tue 4/296:50 amIDA - TYS
2 stops11h 16mUnited Airlines
Deal found 3/27$389
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/22:43 pmTYS - GEG
2 stops11h 21mAmerican Airlines
Wed 4/236:27 amGEG - TYS
2 stops9h 52mAmerican Airlines
Deal found 3/27$395
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/232:16 pmTYS - JAC
1 stop8h 29mAmerican Airlines
Wed 7/3010:52 amJAC - TYS
1 stop6h 12mAmerican Airlines
Deal found 3/27$440
This Mytrip deal was found by Cheapflights users on 3/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/118:30 amTYS - BOI
3 stops15h 17mMultiple Airlines
Mon 4/141:52 pmBOI - TYS
2 stops26h 40mMultiple Airlines
Deal found 3/27$447
This United Airlines deal was found by Cheapflights users on 3/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/302:00 pmTYS - JAC
2 stops9h 02mUnited Airlines
Thu 9/41:28 pmJAC - TYS
2 stops8h 29mUnited Airlines
Deal found 3/27$507
This Delta deal was found by Cheapflights users on 3/26. 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 4/1110:06 amTYS - JAC
2 stops10h 52mDelta
Tue 4/151:23 pmJAC - TYS
2 stops8h 25mDelta
Deal found 3/26$529

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 28, 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 5/6

5:30 am-11:43 am

1 stop9h 13m

Spokane

Thu 5/29

11:22 pm-9:40 am

1 stop7h 18m

$229

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Tue 5/6

4:14 pm-8:55 pm

1 stop7h 41m

Spokane

Wed 5/28

6:25 pm-10:27 am

2 stops13h 02m

$234

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 4/26

5:24 am-12:29 pm

1 stop9h 05m

Idaho Falls Fanning Field

Tue 4/29

7:43 am-11:45 pm

2 stops14h 02m

$294

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Thu 8/21

7:57 am-12:27 pm

1 stop6h 30m

Boise Air Term. Gowen Fld

Tue 8/26

1:41 pm-9:37 pm

1 stop5h 56m

$314

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Fri 4/11

4:31 pm-11:03 pm

1 stop8h 32m

Boise Air Term. Gowen Fld

Tue 4/15

2:38 pm-10:30 pm

1 stop5h 52m

$339

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Wed 4/16

12:55 pm-10:56 pm

2 stops12h 01m

Idaho Falls Fanning Field

Sat 4/19

1:10 pm-11:48 pm

2 stops8h 38m

$384

KnoxvilleIdaho Falls

TYS - IDA

TYSIDA

Knoxville McGhee Tyson

Sat 4/26

5:45 am-1:28 pm

2 stops9h 43m

Idaho Falls Fanning Field

Tue 4/29

6:50 am-8:06 pm

2 stops11h 16m

$389

KnoxvilleSpokane

TYS - GEG

TYSGEG

Knoxville McGhee Tyson

Wed 4/2

2:43 pm-11:04 pm

2 stops11h 21m

Spokane

Wed 4/23

6:27 am-7:19 pm

2 stops9h 52m

$395

KnoxvilleJackson

TYS - JAC

TYSJAC

Knoxville McGhee Tyson

Wed 7/23

2:16 pm-8:45 pm

1 stop8h 29m

Jackson Hole

Wed 7/30

10:52 am-7:04 pm

1 stop6h 12m

$440

KnoxvilleBoise

TYS - BOI

TYSBOI

Knoxville McGhee Tyson

Fri 4/11

8:30 am-9:47 pm

3 stops15h 17m

Boise Air Term. Gowen Fld

Mon 4/14

1:52 pm-6:32 pm

2 stops26h 40m

$447

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 21 results
1
2
3

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 $421). 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 28, 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 28, 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
9,798 reviews

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Overall

8.0

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
9,798 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Overall

8.0

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
7,897 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Overall

8.0

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
8,603 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Overall

8.0

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
9,798 reviews

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Overall

8.0

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 cheapest airlines to fly from Knoxville to Idaho one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $115. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from Knoxville to Idaho for a low price.

  • 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 $421). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Knoxville to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Nashville to Newark flights
Nashville to Seattle flights
Nashville to John F Kennedy Intl flights
Nashville to LaGuardia flights
Nashville to Los Angeles flights
Nashville to Fort Lauderdale flights
Nashville to Dallas/Fort Worth flights
Nashville to Las Vegas flights
Nashville to Orlando flights
Nashville to Denver flights
Memphis to LaGuardia flights
Nashville to O'Hare Intl flights
Nashville to Dulles Intl flights
Nashville to Miami flights
Memphis to Las Vegas flights
Nashville to Boston flights
Nashville to Sky Harbor Intl flights
Nashville to Reagan-National flights
Nashville to San Francisco flights
Memphis to Orlando flights
Memphis to John F Kennedy Intl flights
Memphis to Los Angeles flights
Nashville to Tampa flights
Memphis to Seattle flights
Nashville to Honolulu flights
Memphis to Miami flights
Memphis to O'Hare Intl flights
Nashville to Hobby flights
Memphis to Atlanta flights
Memphis to Newark flights
Nashville to Baltimore flights
Memphis to Dallas/Fort Worth flights
Knoxville to LaGuardia flights
Knoxville to O'Hare Intl flights
Memphis to Denver flights
Memphis to Hobby flights
Knoxville to Denver flights
Chattanooga to John F Kennedy Intl flights
Chattanooga to LaGuardia flights
Nashville to Salt Lake City flights
Knoxville to Dulles Intl flights
Memphis to Boston flights
Knoxville to John F Kennedy Intl flights
Nashville to Ontario flights
Nashville to George Bush Intcntl flights
Memphis to George Bush Intcntl flights
Nashville to Charlotte flights
Nashville to Philadelphia flights
Chattanooga to Dallas/Fort Worth flights
Chattanooga to O'Hare Intl flights

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 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$234Average$551FlexibilityNo cancel feeOn-time71%
DeltaCheapest$239Average$412FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$240Average$550FlexibilityNo cancel feeOn-time69%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.