What is the cheapest airline that flies from Phoenix to Idaho?

Alaska Airlines, Southwest, and Delta are the most popular carriers operating from Phoenix to Idaho

How many flights depart from Phoenix to Idaho on average per week?

As of May 2026, 81 flights take off from Phoenix and land in Idaho each week. The most common flight departure day for this route is Thu, with 19% of weekly flights taking off on this day.

How many flights depart from Phoenix to Idaho on average per day?

As of May 2026, 11 flights take off from Phoenix and land in Idaho each day. The most common flight departure time for this route is 8:00PM, with 40% of daily flights taking off in the afternoon.

What airlines fly to Idaho?

American Airlines, Southwest and Alaska Airlines are the top three most popular airlines that fly to Idaho from Phoenix according to our data. American Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 7 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Phoenix to Idaho?

Prices for flights from Phoenix to Idaho were last updated today.

How many operators does momondo search for flights from Phoenix to Idaho?

As of May 2026, there are 8 operators available to choose from for flights from Phoenix to Idaho.

How old do you have to be to fly from Phoenix to Idaho?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Phoenix to Idaho.

What documentation or ID do you need to fly to Idaho?

The required travel and health documents for your Idaho trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$90 Cheap Flights from Phoenix to Idaho in 2026

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Find the cheapest flights from Phoenix to Idaho

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:15 am - 12:30 pm

PHX

BOI

6h 15m

1 stop

6:08 pm - 7:17 pm

BOI

PHX

2h 09mnonstop

$209Multiple Airlines

Thu, May 28 - Mon, Jun 1

5:15 am - 12:30 pm

PHX

BOI

6h 15m

1 stop

1:25 pm - 7:44 am

BOI

PHX

19h 19m

1 stop

$215Frontier

Thu, May 21 - Sun, May 24

7:59 pm - 11:11 pm

PHX

BOI

2h 12mnonstop

6:08 pm - 7:17 pm

BOI

PHX

2h 09mnonstop

$217Alaska Airlines

Sat, May 30 - Tue, Jun 2

5:15 am - 12:30 pm

PHX

BOI

6h 15m

1 stop

6:07 pm - 11:59 pm

BOI

PHX

6h 52m

1 stop

$219Multiple Airlines

Thu, May 28 - Mon, Jun 1

8:25 pm - 11:30 pm

PHX

BOI

2h 05mnonstop

7:55 pm - 9:00 pm

BOI

PHX

2h 05mnonstop

$227Southwest

Wed, May 27 - Fri, May 29

4:56 pm - 9:33 pm

PHX

GEG

4h 37m

1 stop

5:00 am - 9:49 am

GEG

PHX

4h 49m

1 stop

$237Alaska Airlines

Tue, Jul 21 - Tue, Jul 28

8:41 pm - 11:20 pm

PHX

GEG

2h 39mnonstop

3:20 pm - 6:02 pm

GEG

PHX

2h 42mnonstop

$242American Airlines

Wed, Jun 3 - Wed, Jun 10

6:05 pm - 10:45 pm

PHX

GEG

4h 40m

1 stop

12:25 pm - 3:00 pm

GEG

PHX

2h 35mnonstop

$247Southwest

Wed, Jun 3 - Wed, Jun 10

9:33 am - 2:34 pm

PHX

SUN

4h 01m

1 stop

1:10 pm - 6:11 pm

SUN

PHX

6h 01m

1 stop

$271Delta

Tue, Jun 2 - Mon, Jun 8

9:33 am - 2:34 pm

PHX

SUN

4h 01m

1 stop

1:10 pm - 7:15 pm

SUN

PHX

7h 05m

2 stops

$276Delta

Tue, Jun 2 - Mon, Jun 8

Southwest flights from Phoenix to Idaho

Our best Southwest deals on Phoenix to Idaho flight tickets

Southwest

May 27

PHX8:25 pmPhoenix Sky Harbor Intl

2h 05m

BOI11:30 pmBoise Air Term. Gowen Fld

May 29

BOI7:55 pmBoise Air Term. Gowen Fld

2h 05m

PHX9:00 pmPhoenix Sky Harbor Intl

$227

Southwest

Jun 2

PHX7:35 amPhoenix Sky Harbor Intl

6h 05m

2 stops

BOI2:40 pmBoise Air Term. Gowen Fld

Jun 9

BOI5:30 amBoise Air Term. Gowen Fld

2h 05m

PHX6:35 amPhoenix Sky Harbor Intl

$232

Southwest

May 28

PHX9:55 pmPhoenix Sky Harbor Intl

2h 05m

BOI1:00 amBoise Air Term. Gowen Fld

Jun 1

BOI7:55 pmBoise Air Term. Gowen Fld

2h 05m

PHX9:00 pmPhoenix Sky Harbor Intl

$237

Delta flights from Phoenix to Idaho

Our best Delta deals on Phoenix to Idaho flight tickets

Delta

May 27

PHX7:04 pmPhoenix Sky Harbor Intl

4h 00m

1 stop

BOI12:04 amBoise Air Term. Gowen Fld

May 29

BOI12:55 pmBoise Air Term. Gowen Fld

4h 04m

1 stop

PHX3:59 pmPhoenix Sky Harbor Intl

$247

Delta

May 27

PHX9:33 amPhoenix Sky Harbor Intl

6h 25m

1 stop

GEG3:58 pmSpokane

Jun 3

GEG9:31 amSpokane

5h 26m

1 stop

PHX2:57 pmPhoenix Sky Harbor Intl

$257

Delta

Jun 2

PHX9:33 amPhoenix Sky Harbor Intl

4h 01m

1 stop

SUN2:34 pmHailey Sun Valley-Friedman

Jun 8

SUN1:10 pmHailey Sun Valley-Friedman

6h 01m

1 stop

PHX6:11 pmPhoenix Sky Harbor Intl

$271

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Thu 5/28

5:15 am-12:30 pm

1 stop6h 15m

Boise Air Term. Gowen Fld

Mon 6/1

6:08 pm-7:17 pm

Nonstop2h 09m

$209

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Thu 5/21

5:15 am-12:30 pm

1 stop6h 15m

Boise Air Term. Gowen Fld

Sun 5/24

1:25 pm-7:44 am

1 stop19h 19m

$215

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Sat 5/30

7:59 pm-11:11 pm

Nonstop2h 12m

Boise Air Term. Gowen Fld

Tue 6/2

6:08 pm-7:17 pm

Nonstop2h 09m

$217

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Thu 5/28

5:15 am-12:30 pm

1 stop6h 15m

Boise Air Term. Gowen Fld

Mon 6/1

6:07 pm-11:59 pm

1 stop6h 52m

$219

Quickest round-trip

PhoenixBoise

PHX - BOI

PHXBOI

Phoenix Sky Harbor Intl

Wed 5/27

8:25 pm-11:30 pm

Nonstop2h 05m

Boise Air Term. Gowen Fld

Fri 5/29

7:55 pm-9:00 pm

Nonstop2h 05m

$227

PhoenixSpokane

PHX - GEG

PHXGEG

Phoenix Sky Harbor Intl

Tue 7/21

4:56 pm-9:33 pm

1 stop4h 37m

Spokane

Tue 7/28

5:00 am-9:49 am

1 stop4h 49m

$237

PhoenixSpokane

PHX - GEG

PHXGEG

Phoenix Sky Harbor Intl

Wed 6/3

8:41 pm-11:20 pm

Nonstop2h 39m

Spokane

Wed 6/10

3:20 pm-6:02 pm

Nonstop2h 42m

$242

PhoenixSpokane

PHX - GEG

PHXGEG

Phoenix Sky Harbor Intl

Wed 6/3

6:05 pm-10:45 pm

1 stop4h 40m

Spokane

Wed 6/10

12:25 pm-3:00 pm

Nonstop2h 35m

$247

PhoenixHailey

PHX - SUN

PHXSUN

Phoenix Sky Harbor Intl

Tue 6/2

9:33 am-2:34 pm

1 stop4h 01m

Hailey Sun Valley-Friedman

Mon 6/8

1:10 pm-6:11 pm

1 stop6h 01m

$271

PhoenixHailey

PHX - SUN

PHXSUN

Phoenix Sky Harbor Intl

Tue 6/2

9:33 am-2:34 pm

1 stop4h 01m

Hailey Sun Valley-Friedman

Mon 6/8

1:10 pm-7:15 pm

2 stops7h 05m

$276

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Phoenix to Idaho

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Idaho?

In general, August is the cheapest month to fly from Phoenix to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $78. If you don’t want to visit Idaho in August, then you should wait until June to fly from Phoenix, when ticket prices are also cheap, with an average price of $81.

What is the cheapest day to depart on your flight to Idaho?

Our data shows that Tuesday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $243. On the other hand, Sunday is the most expensive day to depart from Phoenix because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $323.

What is the cheapest time of day to depart on your flight to Idaho?

According to our data, the cheapest time of day to fly to Idaho is in the afternoon. momondo users have found flights departing from Phoenix to Idaho in the afternoon for as low as $206. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. At noon is when there is more demand to fly to Idaho, so prices are often more expensive at around $283 per ticket.

What is the cheapest Phoenix to Idaho flight route?

Fly from Phoenix-Mesa Gateway to Idaho Falls Fanning Field for the best Phoenix - Idaho flight prices

How far in advance should I book a flight from Phoenix to Idaho?

You are more likely to see cheaper flights to Idaho from Phoenix when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $254 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from Phoenix for as low as $192 on momondo.

Cheap Phoenix to Idaho flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Phoenix to Idaho

Fastest flight time	2h 00m
Direct flights	Every day
Airports in Idaho	27 airports

The fastest flight from Phoenix to Idaho takes 2h 00m

Direct flights go from Phoenix to Idaho every day.

There are 27 airports in Idaho. From Phoenix there are direct flights to Idaho Falls Fanning Field (IDA), Boise Air Term. Gowen Fld (BOI).

Search flight deals

Frequently asked questions about flying from Phoenix to Idaho

When did momondo last update prices for flights from Phoenix to Idaho?
Prices for flights from Phoenix to Idaho were last updated today.
How many operators does momondo search for flights from Phoenix to Idaho?
As of May 2026, there are 8 operators available to choose from for flights from Phoenix to Idaho.
How old do you have to be to fly from Phoenix to Idaho?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Phoenix to Idaho.
What documentation or ID do you need to fly to Idaho?
The required travel and health documents for your Idaho trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Phoenix to Idaho

Compare and see reviews for airlines that fly from Phoenix to Idaho with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $81	Free Cancellation	Rating 7.9 8,456 reviews	Search Delta flights
Allegiant Air	PriceFrom $82	Free Cancellation	Rating 7.3 708 reviews	Search Allegiant Air flights
Hawaiian Airlines	PriceFrom $124	Free Cancellation	Rating 7.8 2,837 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $137	Free Cancellation	Rating 7.9 4,302 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $147	Free Cancellation	Rating 7.9 12,342 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $157	Free Cancellation	Rating 7.1 11,667 reviews	Search American Airlines flights
United Airlines	PriceFrom $290	Free Cancellation	Rating 7.4 9,693 reviews	Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Phoenix to Idaho?

Finding the right flight to Idaho from Phoenix is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Idaho quick and easy, saving you time and money.

Can I find flights from Phoenix to Idaho with flexible booking policies on momondo?

Flights from Phoenix to Idaho with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Phoenix to Idaho?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Phoenix to Idaho.

I’m not ready to book a flight from Phoenix to Idaho right now. Can momondo alert me if prices change?

Price alerts on flights to Idaho from Phoenix are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.