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Kaua'i

$190+ Cheap flights from Idaho to Kaua'i

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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIH
Aug 6 — Aug 131
Wed 8/6
Wed 8/13
1 adult, Economy
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Cheap flight deals from Idaho to Kaua'i

Keep the following information in mind while searching for Idaho to Kaua'i flight deals. Data was last updated August 1, 2025.

Round-trip from

$363
(Alaska Airlines)

One-way from

$190
(Delta)

Popular in

March

Cheapest in

August

Average price

$423
From Idaho to Kaua'i
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One-way flight from Idaho to Kaua'i
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Highest demand for flights based on searches. 1% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 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 Idaho to Kaua'i

Cheapest flights from Idaho to Kaua'i
Explore the most affordable flight options available from Idaho to Kaua'i. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2025.

This Alaska Airlines deal was found by Cheapflights users on 7/31. 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.
Wed 10/299:50 amBOI - LIH
1 stop27h 53mAlaska Airlines
Tue 11/44:52 pmLIH - BOI
1 stop26h 07mAlaska Airlines
Deal found 7/31$363
This Hawaiian Airlines deal was found by Cheapflights users on 7/31. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/272:28 pmBOI - LIH
1 stop11h 02mHawaiian Airlines
Wed 9/310:30 pmLIH - BOI
1 stop8h 07mHawaiian Airlines
Deal found 7/31$379
This Delta deal was found by Cheapflights users on 7/31. 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.
Sun 10/199:17 amGEG - LIH
1 stop12h 46mDelta
Thu 11/610:40 pmLIH - GEG
1 stop7h 57mDelta
Deal found 7/31$379
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1412:34 pmGEG - LIH
2 stops24h 13mAlaska Airlines
Thu 10/236:47 amLIH - GEG
2 stops14h 40mAlaska Airlines
Deal found 7/30$382
This Delta deal was found by Cheapflights users on 7/31. 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 10/184:00 pmBOI - LIH
1 stop28h 53mDelta
Wed 10/299:40 pmLIH - BOI
1 stop11h 40mDelta
Deal found 7/31$399
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Sun 9/142:45 pmBOI - LIH
1 stop9h 13mUnited Airlines
Sat 9/2011:10 pmLIH - BOI
1 stop10h 39mUnited Airlines
Deal found 7/31$471
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/83:05 pmGEG - LIH
1 stop26h 49mAmerican Airlines
Sat 11/1510:44 pmLIH - GEG
1 stop22h 25mAmerican Airlines
Deal found 7/30$499
This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1710:00 amGEG - LIH
1 stop9h 00mSouthwest
Fri 10/2410:00 amLIH - GEG
1 stop10h 20mSouthwest
Deal found 7/30$584
This Delta deal was found by Cheapflights users on 7/31. 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 10/77:10 amLWS - LIH
2 stops12h 43mDelta
Tue 10/219:40 pmLIH - LWS
2 stops12h 42mDelta
Deal found 7/31$724
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/186:15 amIDA - LIH
1 stop19h 39mAlaska Airlines
Sat 8/232:25 pmLIH - IDA
2 stops20h 52mAlaska Airlines
Deal found 7/30$874
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/147:00 amIDA - LIH
1 stop12h 35mUnited Airlines
Mon 8/187:40 pmLIH - IDA
1 stop10h 07mUnited Airlines
Deal found 7/30$983
This Delta deal was found by Cheapflights users on 7/31. 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 9/511:20 amIDA - LIH
2 stops11h 43mDelta
Fri 9/128:32 pmLIH - IDA
2 stops11h 54mDelta
Deal found 7/31$1,337

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Kaua'i 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 August 1, 2025.
Use the filters below to find and compare flights from Idaho to Kaua'i that are best for you.

Fly from

Idaho

Fly to

Kaua'i

Route

Depart

Return

Price

BoiseLihue

BOI - LIH

BOILIH

Boise Air Term. Gowen Fld

Wed 10/29

9:50 am-9:43 am

1 stop27h 53m

Lihue

Tue 11/4

4:52 pm-9:59 pm

1 stop26h 07m

$363

BoiseLihue

BOI - LIH

BOILIH

Boise Air Term. Gowen Fld

Wed 8/27

2:28 pm-9:30 pm

1 stop11h 02m

Lihue

Wed 9/3

10:30 pm-10:37 am

1 stop8h 07m

$379

SpokaneLihue

GEG - LIH

GEGLIH

Spokane

Sun 10/19

9:17 am-7:03 pm

1 stop12h 46m

Lihue

Tue 11/4

10:40 pm-10:36 am

1 stop9h 56m

$379

SpokaneLihue

GEG - LIH

GEGLIH

Spokane

Tue 10/14

12:34 pm-9:47 am

2 stops24h 13m

Lihue

Thu 10/23

7:54 pm-1:04 pm

2 stops14h 10m

$382

BoiseLihue

BOI - LIH

BOILIH

Boise Air Term. Gowen Fld

Sat 10/18

4:00 pm-4:53 pm

1 stop28h 53m

Lihue

Wed 10/29

9:40 pm-1:20 pm

1 stop11h 40m

$399

BoiseLihue

BOI - LIH

BOILIH

Boise Air Term. Gowen Fld

Sun 9/14

2:45 pm-7:58 pm

1 stop9h 13m

Lihue

Sat 9/20

11:10 pm-1:49 pm

1 stop10h 39m

$471

SpokaneLihue

GEG - LIH

GEGLIH

Spokane

Sat 11/8

3:05 pm-3:54 pm

1 stop26h 49m

Lihue

Sat 11/15

10:44 pm-11:09 pm

1 stop22h 25m

$499

SpokaneLihue

GEG - LIH

GEGLIH

Spokane

Mon 1/26

3:25 pm-10:15 pm

1 stop8h 50m

Lihue

Fri 1/30

10:10 pm-8:04 am

1 stop7h 54m

$531

SpokaneLihue

GEG - LIH

GEGLIH

Spokane

Fri 10/17

10:00 am-4:00 pm

1 stop9h 00m

Lihue

Fri 10/24

10:00 am-11:20 pm

1 stop10h 20m

$584

LewistonLihue

LWS - LIH

LWSLIH

Lewiston Nez Perce Rgnl

Tue 10/7

7:10 am-4:53 pm

2 stops12h 43m

Lihue

Tue 10/21

9:40 pm-1:22 pm

2 stops12h 42m

$724

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 17 results
1
2

Best time to book a flight from Idaho to Kaua'i

Have a flexible travel schedule? Discover the best time to fly to Kaua'i from Idaho 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 Idaho to Kaua'i

What is the cheapest month to book a flight from Idaho to Kaua'i?

Currently, January is the cheapest month in which you can book a flight from Idaho to Kaua'i (average of $440). Flying from Idaho to Kaua'i in June is currently the most expensive (average of $689). 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 ID to FUS?

Find hourly flight availability from Idaho to Kaua'i. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 1, 2025.

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

Reviews of airlines servicing Kaua'i

Get insights into the airlines that provide service to Kaua'i. 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 Kaua'i. Reviews last updated August 1, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Idaho to Kaua'i. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Kaua'i. 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 to fly from Idaho to Kaua'i one-way?

    The cheapest airlines for a one-way flight from Idaho to Kaua'i are Delta ($190), Alaska Airlines ($213), and United Airlines ($473).

  • Can I find deals for flights from Idaho to Kaua'i that include hotel bookings?

    Yes. In addition to deals on Idaho to Kaua'i flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho to Kaua'i?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Kaua'i.

  • Can I find deals for business class flights from Idaho to Kaua'i?

    Yes. Cheapflights offers flight deals from Idaho to Kaua'i 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 Idaho to Kaua'i?

    Currently, January is the cheapest month in which you can book a flight from Idaho to Kaua'i (average of $440). Flying from Idaho to Kaua'i in June is currently the most expensive (average of $689). 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 Idaho to Kaua'i

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Idaho to Kaua'i

Discover the top 5 airlines that operate flights from Idaho to Kaua'i. 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 August 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$280Average$668FlexibilityNo cancel feeOn-time85%
DeltaCheapest$321Average$894FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$345Average$751FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$381Average$647FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$450Average$641FlexibilityNo cancel feeOn-time63%

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