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$40+ Cheap flights from Sky Harbor Intl (PHX) 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — BOI
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Sky Harbor Intl to Idaho

Cheapest flights from Sky Harbor Intl to Idaho
Explore the most affordable flight options available from Sky Harbor Intl to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This Frontier deal was found by Cheapflights users on 12/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:00 amPHX - GEG
1 stop5h 07mFrontier
Sat 1/312:02 pmGEG - PHX
1 stop8h 39mFrontier
Deal found 12/11$173
This Expedia deal was found by Cheapflights users on 12/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/187:00 amPHX - BOI
1 stop4h 43mMultiple Airlines
Mon 1/56:45 pmBOI - PHX
Nonstop2h 11mMultiple Airlines
Deal found 12/9$195
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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 12/318:20 amPHX - BOI
1 stop15h 39mAlaska Airlines
Wed 1/712:21 pmBOI - PHX
Nonstop2h 08mAlaska Airlines
Deal found 12/10$210
This Frontier deal was found by Cheapflights users on 12/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/252:02 pmPHX - GEG
Nonstop2h 51mFrontier
Tue 12/304:48 pmGEG - PHX
Nonstop3h 04mFrontier
Deal found 12/11$215
This Trip.com deal was found by Cheapflights users on 12/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/203:43 pmPHX - GEG
1 stop20h 24mFrontier
Sun 1/44:48 pmGEG - PHX
Nonstop3h 04mFrontier
Deal found 12/10$220
This Expedia deal was found by Cheapflights users on 12/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/187:00 amPHX - BOI
1 stop4h 43mFrontier
Fri 1/912:07 pmBOI - PHX
1 stop8h 06mFrontier
Deal found 12/9$222
This Frontier deal was found by Cheapflights users on 12/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/212:02 pmPHX - GEG
Nonstop2h 51mFrontier
Sat 1/312:02 pmGEG - PHX
1 stop11h 42mFrontier
Deal found 12/11$237
This Alaska Airlines deal was found by Cheapflights users on 12/9. 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.
Thu 12/189:38 pmPHX - BOI
Nonstop2h 21mAlaska Airlines
Wed 1/712:21 pmBOI - PHX
Nonstop2h 08mAlaska Airlines
Deal found 12/9$245
This Alaska Airlines deal was found by Cheapflights users on 12/9. 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 12/308:36 pmPHX - BOI
1 stop27h 23mAlaska Airlines
Tue 1/66:45 pmBOI - PHX
Nonstop2h 11mAlaska Airlines
Deal found 12/9$250
This Expedia deal was found by Cheapflights users on 12/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:00 amPHX - BOI
1 stop4h 49mMultiple Airlines
Tue 1/62:39 pmBOI - PHX
1 stop7h 39mMultiple Airlines
Deal found 12/9$254
This Delta deal was found by Cheapflights users on 12/9. 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 12/306:35 amPHX - BOI
1 stop5h 27mDelta
Tue 1/65:15 pmBOI - PHX
1 stop6h 39mDelta
Deal found 12/9$258
This Delta deal was found by Cheapflights users on 12/10. 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 12/245:37 pmPHX - SUN
1 stop4h 43mDelta
Tue 12/306:42 pmSUN - PHX
1 stop6h 04mDelta
Deal found 12/10$259

Find flight deals from Sky Harbor Intl to Idaho

Keep the following information in mind while searching for Sky Harbor Intl to Idaho flight deals. Data was last updated December 12, 2025.

Round-trip from

$104
(Frontier)

One-way from

$40
(Frontier)

Popular in

December

Cheapest in

September

Average price

$368

Good round-trip deal

$267 or less

Good one-way deal

$111 or less
From Phoenix Sky Harbor Intl to Idaho
Search Deals
One-way flight from Phoenix Sky Harbor Intl to Idaho
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Phoenix Sky Harbor Intl to Idaho.
Search Deals
Price to beat on a one-way flight from Phoenix Sky Harbor Intl to Idaho.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Sky Harbor Intl 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 December 12, 2025.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Idaho that are best for you.

Fly from

Sky Harbor Intl

Fly to

Idaho

Route

Depart

Return

Price

PhoenixSpokane

PHX - GEG

PHXGEG

Phoenix Sky Harbor Intl

Thu 2/26

4:46 pm-6:37 pm

Nonstop2h 51m

Spokane

Sun 3/1

7:32 pm-11:36 pm

Nonstop3h 04m

$116

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Wed 1/7

3:11 pm-5:29 pm

Nonstop2h 18m

Boise Air Term. Gowen Fld

Sat 1/10

7:45 am-2:00 pm

1 stop6h 15m

$167

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Wed 1/7

1:10 pm-5:15 pm

1 stop4h 05m

Boise Air Term. Gowen Fld

Fri 1/9

6:40 am-9:00 am

Nonstop2h 20m

$177

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Thu 2/5

9:42 am-12:07 pm

Nonstop2h 25m

Boise Air Term. Gowen Fld

Sun 2/8

12:37 pm-2:55 pm

Nonstop2h 18m

$177

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Fri 1/16

3:11 pm-5:29 pm

Nonstop2h 18m

Boise Air Term. Gowen Fld

Tue 1/20

5:55 pm-11:59 pm

1 stop6h 04m

$177

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Sat 1/10

8:55 am-11:05 am

Nonstop2h 10m

Boise Air Term. Gowen Fld

Sat 1/17

3:50 pm-7:40 pm

1 stop3h 50m

$177

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Fri 2/13

7:52 pm-10:09 pm

Nonstop2h 17m

Boise Air Term. Gowen Fld

Sun 2/15

7:15 am-9:37 am

Nonstop2h 22m

$177

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Fri 1/23

3:11 pm-5:29 pm

Nonstop2h 18m

Boise Air Term. Gowen Fld

Wed 1/28

4:04 pm-9:08 pm

1 stop5h 04m

$177

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Mon 1/12

12:05 pm-8:12 pm

1 stop8h 07m

Boise Air Term. Gowen Fld

Mon 1/26

5:40 am-11:08 am

1 stop5h 28m

$185

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Fri 2/6

4:42 pm-9:58 pm

1 stop5h 16m

Boise Air Term. Gowen Fld

Mon 2/9

5:40 am-1:50 pm

1 stop8h 10m

$185

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 60 results
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Best time to book a flight from Sky Harbor Intl to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Sky Harbor Intl 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 Phoenix Sky Harbor Intl Airport to Idaho

What is the cheapest month to book a flight from Phoenix Sky Harbor Intl Airport to Idaho?

Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Idaho (average of $115). Flying from Phoenix Sky Harbor Intl Airport to Idaho in May is currently the most expensive (average of $177). 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 PHX to ID?

Find hourly flight availability from Sky Harbor Intl 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 December 12, 2025.

It’s typically best to fly out from Phoenix Sky Harbor Intl Airport to Idaho in the evening. Doing so could potentially save you 22% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Phoenix Sky Harbor Intl Airport to Idaho?

Use this chart to determine the cheapest time to fly round-trip from Sky Harbor Intl to Idaho. Price data was last updated on December 6, 2025.

Travelers seeking maximum savings on their Phoenix Sky Harbor Intl Airport to Idaho flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Phoenix Sky Harbor Intl Airport to Idaho

Explore weekly flight availability from Sky Harbor Intl to Idaho. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 12, 2025.

The most flights from PHX to USID are scheduled on a Thursday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

How much does it cost to fly round-trip from Phoenix Sky Harbor Intl Airport to Idaho?

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 December 12, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Phoenix Sky Harbor Intl Airport to Idaho by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,431 reviews

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Alaska Airlines
8.0
Very good
11,431 reviews
Alaska Airlines
8.0
Very good
11,431 reviews

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Southwest
7.9
Good
4,252 reviews
Alaska Airlines
8.0
Very good
11,431 reviews

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Delta
7.9
Good
8,009 reviews
Alaska Airlines
8.0
Very good
11,431 reviews

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Hawaiian Airlines
7.8
Good
2,818 reviews
Alaska Airlines
8.0
Very good
11,431 reviews

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
American Airlines
7.2
Good
11,049 reviews
Alaska Airlines
8.0
Very good
11,431 reviews

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.

Related info for your journey

Find useful and relevant information for your journey from Sky Harbor Intl to Idaho. 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 Phoenix Sky Harbor Intl Airport to Idaho?

    Airlines like Frontier, Alaska Airlines, and Southwest fly from Phoenix Sky Harbor Intl Airport to Idaho in about 2h 18m. The time it takes to get you to your destination can typically vary by up to 1h 47m. The distance from Phoenix Sky Harbor Intl Airport to Idaho is about 736 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Phoenix Sky Harbor Intl Airport to Idaho one-way?

    $48 is the cheapest one-way deal found within the past few days, from Allegiant Air. You may also be able to find cheap deals on Alaska Airlines and Southwest, with prices starting from $78 and $78, respectively.

  • What are the most popular routes from Phoenix Sky Harbor Intl Airport to Idaho?

    Most travelers choose Phoenix Sky Harbor Intl - Boise Air Term. Gowen Fld, Phoenix Sky Harbor Intl - Spokane or Phoenix Sky Harbor Intl - Jackson Hole when deciding on the best route from Phoenix Sky Harbor Intl Airport to Idaho.

  • What are the most reliable airlines from Phoenix Sky Harbor Intl Airport to Idaho?

    The top 3 most reliable airlines when flying from Phoenix Sky Harbor Intl Airport to Idaho are Envoy Air (92%), American Airlines (86%) and SkyWest Airlines (82%).

  • What are the cheapest flights from Phoenix Sky Harbor Intl Airport to Idaho?

    The cheapest flight price from Phoenix Sky Harbor Intl Airport to Idaho is $78. On average you can expect to pay $265. The most popular route, (Phoenix Sky Harbor Intl - Boise Air Term. Gowen Fld), can usually be booked for $157.

  • Can I find deals for flights from Sky Harbor Intl to Idaho that include hotel bookings?

    Yes. In addition to deals on Sky Harbor Intl to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sky Harbor Intl to Idaho?

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

  • Can I find deals for business class flights from Sky Harbor Intl to Idaho?

    Yes. Cheapflights offers flight deals from Sky Harbor Intl 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 Phoenix Sky Harbor Intl Airport to Idaho?

    Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Idaho (average of $115). Flying from Phoenix Sky Harbor Intl Airport to Idaho in May is currently the most expensive (average of $177). 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.

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Alternative routes for Sky Harbor Intl to Idaho

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Top 7 airlines flying from Sky Harbor Intl to Idaho

Discover the top 7 airlines that operate flights from Sky Harbor Intl 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$56Average$150FlexibilityNo cancel feeOn-time88%
DeltaCheapest$88Average$415FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$136Average$206FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$144Average$248FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$147Average$259FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$156Average$369FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$247Average$424FlexibilityNo cancel feeOn-time69%

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