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$64+ Cheap flights from Idaho to Phoenix

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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — PHX
Apr 16 — Apr 231
Thu 4/16
Thu 4/23
1 adult, Economy
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Cheap flight deals from Idaho to Phoenix

Cheapest flights from Idaho to Phoenix
Explore the most affordable flight options available from Idaho to Phoenix. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 17, 2026.

This Southwest deal was found by Cheapflights users on 3/16. 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.
Sat 4/117:05 am
BOI
-
PHX
Nonstop2h 05m
Southwest
Wed 4/158:25 pm
PHX
-
BOI
Nonstop2h 05m
Southwest
Deal found 3/16$177
This American Airlines deal was found by Cheapflights users on 3/16. 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 4/252:14 pm
BOI
-
PHX
Nonstop2h 11m
American Airlines
Wed 4/298:25 pm
PHX
-
BOI
Nonstop2h 16m
American Airlines
Deal found 3/16$181
This Southwest deal was found by Cheapflights users on 3/13. 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.
Sat 4/112:50 pm
BOI
-
PHX
1 stop7h 20m
Southwest
Sat 4/184:20 pm
PHX
-
BOI
2 stops5h 55m
Southwest
Deal found 3/13$182
This Southwest deal was found by Cheapflights users on 3/16. 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.
Sat 4/254:50 pm
BOI
-
PHX
Nonstop2h 05m
Southwest
Thu 4/309:55 pm
PHX
-
BOI
Nonstop2h 05m
Southwest
Deal found 3/16$187
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:17 pm
IDA
-
PHX
1 stop24h 49m
Multiple Airlines
Mon 5/412:15 pm
PHX
-
IDA
1 stop8h 16m
Multiple Airlines
Deal found 3/16$195
This Alaska Airlines deal was found by Cheapflights users on 3/13. 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 4/156:32 am
BOI
-
PHX
1 stop5h 01m
Alaska Airlines
Mon 4/208:40 pm
PHX
-
BOI
Nonstop2h 18m
Alaska Airlines
Deal found 3/13$197
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/199:19 pm
GEG
-
PHX
1 stop17h 51m
Multiple Airlines
Wed 4/228:07 pm
PHX
-
GEG
1 stop24h 22m
Multiple Airlines
Deal found 3/12$197
This Expedia deal was found by Cheapflights users on 3/13. 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.
Mon 4/135:11 pm
GEG
-
PHX
Nonstop2h 33m
Multiple Airlines
Fri 5/15:00 pm
PHX
-
GEG
1 stop6h 11m
Multiple Airlines
Deal found 3/13$201
This American Airlines deal was found by Cheapflights users on 3/12. 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.
Tue 4/212:14 pm
BOI
-
PHX
Nonstop2h 11m
American Airlines
Tue 4/2810:19 am
PHX
-
BOI
Nonstop2h 23m
American Airlines
Deal found 3/12$205
This Delta deal was found by Cheapflights users on 3/12. 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 4/253:33 pm
GEG
-
PHX
1 stop7h 45m
Delta
Mon 4/276:30 am
PHX
-
GEG
1 stop5h 57m
Delta
Deal found 3/12$205
This Alaska Airlines deal was found by Cheapflights users on 3/13. 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 5/46:00 am
BOI
-
PHX
1 stop7h 58m
Alaska Airlines
Tue 5/126:00 am
PHX
-
BOI
1 stop8h 33m
Alaska Airlines
Deal found 3/13$207
This Gotogate deal was found by Cheapflights users on 3/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/812:33 pm
GEG
-
PHX
1 stop10h 58m
Frontier
Sun 5/104:17 pm
PHX
-
GEG
1 stop19h 21m
Frontier
Deal found 3/15$210

Find flight deals from Idaho to Phoenix

Keep the following information in mind while searching for Idaho to Phoenix flight deals. Data was last updated March 17, 2026.

Round-trip from

$177
(Southwest)

One-way from

$64
(Frontier)

Popular in

March

Cheapest in

September

Average price

$349
From Idaho to Phoenix
Search Deals
One-way flight from Idaho to Phoenix
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Phoenix 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 17, 2026.
Use the filters below to find and compare flights from Idaho to Phoenix that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoisePhoenix

BOI - PHX

BOIPHX

Boise Air Term. Gowen Fld

Sat 4/11

4:50 pm-5:55 pm

Nonstop2h 05m

Phoenix Sky Harbor Intl

Sat 4/18

7:00 pm-10:05 pm

Nonstop2h 05m

$177

BoisePhoenix

BOI - PHX

BOIPHX

Boise Air Term. Gowen Fld

Wed 4/15

6:32 am-10:33 am

1 stop5h 01m

Phoenix Sky Harbor Intl

Mon 4/20

8:40 pm-11:58 pm

Nonstop2h 18m

$177

BoisePhoenix

BOI - PHX

BOIPHX

Boise Air Term. Gowen Fld

Wed 4/15

7:05 am-10:10 am

1 stop4h 05m

Phoenix Sky Harbor Intl

Mon 4/20

6:10 pm-12:45 am

1 stop5h 35m

$187

BoisePhoenix

BOI - PHX

BOIPHX

Boise Air Term. Gowen Fld

Tue 4/14

2:00 pm-7:35 pm

2 stops6h 35m

Phoenix Sky Harbor Intl

Tue 4/21

7:40 am-2:40 pm

2 stops6h 00m

$187

BoisePhoenix

BOI - PHX

BOIPHX

Boise Air Term. Gowen Fld

Wed 4/15

6:32 am-10:33 am

1 stop5h 01m

Phoenix Sky Harbor Intl

Wed 4/22

6:37 am-12:32 pm

1 stop4h 55m

$197

BoisePhoenix

BOI - PHX

BOIPHX

Boise Air Term. Gowen Fld

Wed 4/29

6:40 am-7:45 am

Nonstop2h 05m

Phoenix Sky Harbor Intl

Sun 5/3

6:05 am-11:45 am

1 stop4h 40m

$217

BoisePhoenix

BOI - PHX

BOIPHX

Boise Air Term. Gowen Fld

Sun 4/5

4:25 pm-9:20 pm

1 stop5h 55m

Phoenix Sky Harbor Intl

Thu 4/9

4:40 pm-11:30 pm

1 stop5h 50m

$217

SpokanePhoenix

GEG - PHX

GEGPHX

Spokane

Wed 5/6

10:30 am-10:43 pm

1 stop12h 13m

Phoenix Sky Harbor Intl

Sat 5/9

3:43 pm-10:20 pm

1 stop6h 37m

$240

SpokanePhoenix

GEG - PHX

GEGPHX

Spokane

Sat 4/25

2:45 pm-11:59 pm

1 stop9h 14m

Phoenix Sky Harbor Intl

Tue 4/28

6:37 am-10:20 pm

1 stop15h 43m

$244

SpokanePhoenix

GEG - PHX

GEGPHX

Spokane

Thu 5/7

9:30 am-4:37 pm

1 stop7h 07m

Phoenix Sky Harbor Intl

Tue 5/12

3:55 pm-9:13 pm

1 stop5h 18m

$245

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/13

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Idaho to Phoenix

Have a flexible travel schedule? Discover the best time to fly to Phoenix 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 Phoenix

What is the cheapest month to book a flight from Idaho to Phoenix?

Currently, August is the cheapest month in which you can book a flight from Idaho to Phoenix (average of $82). Flying from Idaho to Phoenix in March is currently the most expensive (average of $130). 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 PHX?

Find hourly flight availability from Idaho to Phoenix. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 17, 2026.

When flying from Idaho to Phoenix, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 39% versus a flight in the morning.

What is the cheapest day to fly from Idaho to Phoenix?

Use this chart to determine the cheapest time to fly round-trip from Idaho to Phoenix. Price data was last updated on March 14, 2026.

Travelers seeking maximum savings on their Idaho to Phoenix flight should consider departing on Monday evenings when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Idaho to Phoenix

Explore weekly flight availability from Idaho to Phoenix. 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 March 17, 2026.

The most flights from USID to PH1 are scheduled on a Tuesday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

Related info for your journey

Find useful and relevant information for your journey from Idaho to Phoenix. 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 Idaho to Phoenix?

    There are many flights that can get you from Idaho to Phoenix in 2h 05m. Fly via Southwest, Alaska Airlines, or Delta to get the fastest option. The distance from Idaho to Phoenix 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 Idaho to Phoenix one-way?

    One-way options have recently been found by users for as low as $51 on Allegiant Air. Other airlines that offer cheap prices include Southwest from $78 and Alaska Airlines from $78 one-way.

  • What are the most popular routes from Idaho to Phoenix?

    When deciding which route to take from Idaho to Phoenix consider Spokane - Phoenix Sky Harbor Intl, Boise Air Term. Gowen Fld - Phoenix Sky Harbor Intl or Idaho Falls Fanning Field - Phoenix Sky Harbor Intl as they are the most popular.

  • What are the most reliable airlines from Idaho to Phoenix?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Idaho to Phoenix on time: Alaska Airlines (93%), Porter Airlines (91%), Hawaiian Airlines (81%).

  • What are the cheapest flights from Idaho to Phoenix?

    The cheapest flight price from Idaho to Phoenix is $78. On average you can expect to pay $298. The most popular route, (Spokane - Phoenix Sky Harbor Intl), can usually be booked for $242.

  • Can I find deals for flights from Idaho to Phoenix that include hotel bookings?

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

  • How can I find direct flights from Idaho to Phoenix?

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

  • Can I find deals for business class flights from Idaho to Phoenix?

    Yes. Cheapflights offers flight deals from Idaho to Phoenix 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 Phoenix?

    Currently, August is the cheapest month in which you can book a flight from Idaho to Phoenix (average of $82). Flying from Idaho to Phoenix in March is currently the most expensive (average of $130). 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 Idaho to Phoenix

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Top 7 airlines flying from Idaho to Phoenix

Discover the top 7 airlines that operate flights from Idaho to Phoenix. 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 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$82Average$160FlexibilityNo cancel feeOn-time88%
DeltaCheapest$88Average$378FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$88Average$228FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$157Average$265FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$157Average$262FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$158Average$349FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$196Average$325FlexibilityNo cancel feeOn-time69%

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