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

United Airlines, Delta, and American Airlines are the most popular carriers operating from Philadelphia to Idaho

What airlines fly to Idaho?

Delta, United Airlines and American Airlines are the top three most popular airlines that fly to Idaho from Philadelphia according to our data. Delta 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 5 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 Philadelphia Airport to Idaho?

Prices for flights from Philadelphia Airport to Idaho are updated daily.

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

The number of operators available for flights from Philadelphia Airport to Idaho is 4 as of March 2026.

How old do you have to be to fly from Philadelphia Airport 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 Philadelphia Airport to Idaho.

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

The necessary travel and health documents for your Idaho trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$116 Cheap Flights from Philadelphia to Idaho in 2026

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Find the cheapest flights from Philadelphia to Idaho

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:41 pm - 10:49 am

PHL

GEG

17h 08m

1 stop

11:44 am - 5:34 am

GEG

PHL

14h 50m

1 stop

$223Frontier

Sat, Apr 18 - Sun, Apr 26

7:15 am - 12:32 pm

PHL

GEG

8h 17m

1 stop

1:22 pm - 11:59 pm

GEG

PHL

7h 37m

1 stop

$297American Airlines

Sat, Apr 18 - Tue, Apr 21

11:38 am - 9:02 pm

PHL

GEG

12h 24m

2 stops

6:59 pm - 5:59 am

GEG

PHL

8h 00m

1 stop

$302Delta

Tue, Apr 14 - Tue, Apr 21

2:59 pm - 12:20 am

PHL

GEG

12h 21m

2 stops

7:38 pm - 11:48 am

GEG

PHL

13h 10m

2 stops

$307Delta

Tue, Apr 14 - Tue, Apr 21

7:00 am - 1:04 pm

PHL

GEG

9h 04m

1 stop

12:33 pm - 5:37 am

GEG

PHL

14h 04m

1 stop

$317Multiple Airlines

Wed, May 13 - Mon, May 18

6:54 pm - 11:57 pm

PHL

BOI

7h 03m

1 stop

6:41 pm - 6:10 am

BOI

PHL

9h 29m

1 stop

$317Delta

Tue, May 5 - Tue, May 12

6:05 pm - 10:33 pm

PHL

GEG

7h 28m

1 stop

5:30 am - 7:18 pm

GEG

PHL

10h 48m

2 stops

$322Delta

Sat, Apr 18 - Wed, Apr 22

5:40 am - 9:50 am

PHL

GEG

7h 10m

1 stop

1:10 pm - 11:00 pm

GEG

PHL

6h 50m

1 stop

$337Southwest

Mon, Apr 20 - Sat, Apr 25

9:21 am - 5:53 pm

PHL

JAC

10h 32m

2 stops

2:44 pm - 11:30 pm

JAC

PHL

6h 46m

1 stop

$444United Airlines

Wed, Jul 22 - Tue, Jul 28

8:00 am - 1:35 pm

PHL

SUN

7h 35m

1 stop

2:24 pm - 11:43 pm

SUN

PHL

7h 19m

1 stop

$501United Airlines

Tue, Apr 14 - Wed, Apr 15

Alaska Airlines flights from Philadelphia to Idaho

Our best Alaska Airlines deals on Philadelphia to Idaho flight tickets

Alaska Airlines

Apr 14

PHL6:47 pmPhiladelphia

8h 12m

1 stop

GEG11:59 pmSpokane

Apr 21

GEG5:00 amSpokane

9h 47m

1 stop

PHL5:47 pmPhiladelphia

$328

Alaska Airlines

Apr 14

PHL7:25 amPhiladelphia

10h 04m

1 stop

BOI3:29 pmBoise Air Term. Gowen Fld

Apr 18

BOI6:00 amBoise Air Term. Gowen Fld

9h 47m

1 stop

PHL5:47 pmPhiladelphia

$335

Alaska Airlines

Apr 14

PHL7:25 amPhiladelphia

10h 04m

1 stop

BOI3:29 pmBoise Air Term. Gowen Fld

Apr 18

BOI6:00 amBoise Air Term. Gowen Fld

9h 47m

1 stop

PHL5:47 pmPhiladelphia

$337

United Airlines flights from Philadelphia to Idaho

Our best United Airlines deals on Philadelphia to Idaho flight tickets

United Airlines

Apr 14

PHL10:00 amPhiladelphia

14h 11m

2 stops

GEG9:11 pmSpokane

Apr 21

GEG1:46 pmSpokane

6h 57m

1 stop

PHL11:43 pmPhiladelphia

$362

United Airlines

Apr 14

PHL11:36 amPhiladelphia

12h 35m

2 stops

GEG9:11 pmSpokane

Apr 18

GEG5:05 amSpokane

9h 27m

2 stops

PHL5:32 pmPhiladelphia

$392

United Airlines

Apr 2

PHL6:17 amPhiladelphia

7h 00m

1 stop

JAC11:17 amJackson Hole

Apr 5

JAC2:35 pmJackson Hole

8h 24m

2 stops

PHL12:59 amPhiladelphia

$424

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 4/18

8:41 pm-10:49 am

1 stop17h 08m

Spokane

Sun 4/26

11:44 am-5:34 am

1 stop14h 50m

$223

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 4/18

7:15 am-12:32 pm

1 stop8h 17m

Spokane

Tue 4/21

1:22 pm-11:59 pm

1 stop7h 37m

$297

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 4/14

11:38 am-9:02 pm

2 stops12h 24m

Spokane

Tue 4/21

6:59 pm-5:59 am

1 stop8h 00m

$302

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 4/14

2:59 pm-12:20 am

2 stops12h 21m

Spokane

Tue 4/21

7:38 pm-11:48 am

2 stops13h 10m

$307

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 5/13

7:00 am-1:04 pm

1 stop9h 04m

Spokane

Mon 5/18

12:33 pm-5:37 am

1 stop14h 04m

$317

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 5/5

6:54 pm-11:57 pm

1 stop7h 03m

Boise Air Term. Gowen Fld

Tue 5/12

6:41 pm-6:10 am

1 stop9h 29m

$317

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 4/18

6:05 pm-10:33 pm

1 stop7h 28m

Spokane

Wed 4/22

5:30 am-7:18 pm

2 stops10h 48m

$322

Quickest round-trip

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Mon 4/20

5:40 am-9:50 am

1 stop7h 10m

Spokane

Sat 4/25

1:10 pm-11:00 pm

1 stop6h 50m

$337

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Wed 7/22

9:21 am-5:53 pm

2 stops10h 32m

Jackson Hole

Tue 7/28

2:44 pm-11:30 pm

1 stop6h 46m

$444

PhiladelphiaHailey

PHL - SUN

PHLSUN

Philadelphia

Tue 4/14

8:00 am-1:35 pm

1 stop7h 35m

Hailey Sun Valley-Friedman

Wed 4/15

2:24 pm-11:43 pm

1 stop7h 19m

$501

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 Philadelphia 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

What is the cheapest month to fly to Idaho?

In general, September is the cheapest month to fly from Philadelphia to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $358. If you don’t want to visit Idaho in September, then you should wait until August to fly from Philadelphia, when ticket prices are also cheap, with an average price of $365.

What is the cheapest Philadelphia to Idaho flight route?

Fly from Philadelphia to Boise Air Term. Gowen Fld for the best Philadelphia - Idaho flight prices

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

You are more likely to see cheaper flights to Idaho from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $453 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from Philadelphia for as low as $313 on momondo.

What cabin class options are available on Philadelphia to Idaho flights?

There is only 1 cabin class available to choose from on Philadelphia to Idaho flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Philadelphia to Idaho flights?

You could potentially save up to 22% on your flight if you consider stops on a Philadelphia to Idaho flight.

Cheap Philadelphia to Idaho flight deals and tips

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

Fastest flight time	6h 25m
Direct flights	None

The fastest flight from Philadelphia to Idaho takes 6h 25m

There are no direct flights from Philadelphia to Idaho. There are no popular flight routes from Philadelphia to Idaho.

Search flight deals

When did momondo last update prices for flights from Philadelphia Airport to Idaho?
Prices for flights from Philadelphia Airport to Idaho are updated daily.
How many operators does momondo search for flights from Philadelphia Airport to Idaho?
The number of operators available for flights from Philadelphia Airport to Idaho is 4 as of March 2026.
How old do you have to be to fly from Philadelphia Airport 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 Philadelphia Airport to Idaho.
What documentation or ID do you need to fly to Idaho?
The necessary travel and health documents for your Idaho trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Philadelphia to Idaho

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $199	Free Cancellation	Rating 7.9 8,303 reviews	Search Delta flights
American Airlines	PriceFrom $283	Free Cancellation	Rating 7.1 11,480 reviews	Search American Airlines flights
United Airlines	PriceFrom $348	Free Cancellation	Rating 7.4 9,450 reviews	Search United Airlines flights
Southwest	PriceFrom $358	Free Cancellation	Rating 8.0 4,324 reviews	Search Southwest flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Philadelphia to Idaho. Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Philadelphia 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 Philadelphia to Idaho?

momondo provides multiple filters to help you find the best flight to Idaho from Philadelphia. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Philadelphia to Idaho flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.