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

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

What airlines fly to Idaho?

Delta, American Airlines and United 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 May 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.

$111 Cheap Flights from Philadelphia to Idaho in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

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.

8:35 pm - 12:38 pm

PHL

BOI

18h 03m

1 stop

1:25 pm - 11:47 am

BOI

PHL

20h 22m

1 stop

$215Frontier

Sat, Jun 6 - Tue, Jun 9

8:35 pm - 12:30 pm

PHL

BOI

17h 55m

1 stop

1:25 pm - 5:37 am

BOI

PHL

14h 12m

1 stop

$226Frontier

Sat, May 23 - Sun, May 31

6:45 pm - 11:58 pm

PHL

GEG

8h 13m

1 stop

2:23 pm - 11:58 pm

GEG

PHL

6h 35m

1 stop

$279Delta

Wed, Jun 3 - Thu, Jun 11

2:23 pm - 10:28 pm

PHL

BOI

10h 05m

1 stop

5:45 am - 5:35 pm

BOI

PHL

9h 50m

1 stop

$279Delta

Thu, Jun 4 - Sat, Jun 6

3:20 pm - 8:43 pm

PHL

GEG

8h 23m

1 stop

12:51 pm - 12:36 am

GEG

PHL

8h 45m

1 stop

$296American Airlines

Sat, May 23 - Thu, May 28

5:00 am - 10:29 am

PHL

BOI

7h 29m

1 stop

3:11 pm - 12:31 am

BOI

PHL

7h 20m

1 stop

$298American Airlines

Tue, May 26 - Thu, May 28

10:00 am - 2:58 pm

PHL

GEG

7h 58m

1 stop

1:38 pm - 11:37 pm

GEG

PHL

6h 59m

1 stop

$304United Airlines

Mon, Aug 24 - Wed, Sep 2

11:30 am - 9:04 pm

PHL

GEG

12h 34m

2 stops

1:38 pm - 11:37 pm

GEG

PHL

6h 59m

1 stop

$308United Airlines

Mon, Aug 24 - Wed, Sep 2

4:44 pm - 1:06 pm

PHL

IDA

22h 22m

1 stop

4:14 pm - 3:44 pm

IDA

PHL

21h 30m

1 stop

$349Alaska Airlines

Sun, Sep 13 - Fri, Sep 25

7:00 am - 10:14 am

PHL

SUN

29h 14m

1 stop

10:56 am - 5:35 am

SUN

PHL

16h 39m

1 stop

$401Alaska Airlines

Thu, May 28 - Thu, Jun 4

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Frontier flights from Philadelphia to Idaho

Our best Frontier deals on Philadelphia to Idaho flight tickets

Frontier

Jun 6

PHL8:35 pmPhiladelphia

18h 03m

1 stop

BOI12:38 pmBoise Air Term. Gowen Fld

Jun 9

BOI1:25 pmBoise Air Term. Gowen Fld

20h 22m

1 stop

PHL11:47 amPhiladelphia

$215

Frontier

May 23

PHL8:35 pmPhiladelphia

17h 55m

1 stop

BOI12:30 pmBoise Air Term. Gowen Fld

May 31

BOI1:25 pmBoise Air Term. Gowen Fld

14h 12m

1 stop

PHL5:37 amPhiladelphia

$226

Frontier

Jun 1

PHL8:35 pmPhiladelphia

17h 55m

1 stop

BOI12:30 pmBoise Air Term. Gowen Fld

Jun 9

BOI1:25 pmBoise Air Term. Gowen Fld

20h 22m

1 stop

PHL11:47 amPhiladelphia

$266

Delta flights from Philadelphia to Idaho

Our best Delta deals on Philadelphia to Idaho flight tickets

Delta

Jun 4

PHL2:23 pmPhiladelphia

10h 05m

1 stop

BOI10:28 pmBoise Air Term. Gowen Fld

Jun 9

BOI6:43 amBoise Air Term. Gowen Fld

8h 52m

1 stop

PHL5:35 pmPhiladelphia

$279

Delta

May 29

PHL6:45 pmPhiladelphia

7h 19m

1 stop

BOI12:04 amBoise Air Term. Gowen Fld

Jun 6

BOI6:41 pmBoise Air Term. Gowen Fld

12h 03m

2 stops

PHL8:44 amPhiladelphia

$284

Delta

May 29

PHL2:23 pmPhiladelphia

11h 41m

2 stops

BOI12:04 amBoise Air Term. Gowen Fld

Jun 8

BOI7:53 pmBoise Air Term. Gowen Fld

12h 54m

2 stops

PHL10:47 amPhiladelphia

$290

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Sat 6/6

8:35 pm-12:38 pm

1 stop18h 03m

Boise Air Term. Gowen Fld

Tue 6/9

1:25 pm-11:47 am

1 stop20h 22m

$215

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Sat 5/23

8:35 pm-12:30 pm

1 stop17h 55m

Boise Air Term. Gowen Fld

Sun 5/31

1:25 pm-5:37 am

1 stop14h 12m

$226

Quickest round-trip

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 6/3

6:45 pm-11:58 pm

1 stop8h 13m

Spokane

Thu 6/11

2:23 pm-11:58 pm

1 stop6h 35m

$279

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 6/4

2:23 pm-10:28 pm

1 stop10h 05m

Boise Air Term. Gowen Fld

Sat 6/6

5:45 am-5:35 pm

1 stop9h 50m

$279

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 5/23

3:20 pm-8:43 pm

1 stop8h 23m

Spokane

Thu 5/28

12:51 pm-12:36 am

1 stop8h 45m

$296

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 5/26

5:00 am-10:29 am

1 stop7h 29m

Boise Air Term. Gowen Fld

Thu 5/28

3:11 pm-12:31 am

1 stop7h 20m

$298

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Mon 8/24

10:00 am-2:58 pm

1 stop7h 58m

Spokane

Wed 9/2

1:38 pm-11:37 pm

1 stop6h 59m

$304

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Mon 8/24

11:30 am-9:04 pm

2 stops12h 34m

Spokane

Wed 9/2

1:38 pm-11:37 pm

1 stop6h 59m

$308

PhiladelphiaIdaho Falls

PHL - IDA

PHLIDA

Philadelphia

Sun 9/13

4:44 pm-1:06 pm

1 stop22h 22m

Idaho Falls Fanning Field

Fri 9/25

4:14 pm-3:44 pm

1 stop21h 30m

$349

PhiladelphiaHailey

PHL - SUN

PHLSUN

Philadelphia

Thu 5/28

7:00 am-10:14 am

1 stop29h 14m

Hailey Sun Valley-Friedman

Thu 6/4

10:56 am-5:35 am

1 stop16h 39m

$401

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, August 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 $131. If you don’t want to visit Idaho in August, then you should wait until May to fly from Philadelphia, when ticket prices are also cheap, with an average price of $148.

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 from Philadelphia 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 $450 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 $305 on momondo.

Can stopping save me money on Philadelphia to Idaho flights?

You could potentially save up to 46% 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 44m
Direct flights	None

The fastest flight from Philadelphia to Idaho takes 6h 44m

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

Search flight deals

Frequently asked questions about flying from Philadelphia to Idaho

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 May 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 $175	Free Cancellation	Rating 7.9 8,460 reviews	Search Delta flights
American Airlines	PriceFrom $283	Free Cancellation	Rating 7.1 11,673 reviews	Search American Airlines flights
United Airlines	PriceFrom $336	Free Cancellation	Rating 7.4 9,680 reviews	Search United Airlines flights
Southwest	PriceFrom $371	Free Cancellation	Rating 7.9 4,307 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.