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$112+ Cheap flights from Philadelphia (PHL) 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
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Cheap flight deals from Philadelphia to Idaho

Keep the following information in mind while searching for Philadelphia to Idaho flight deals. Data was last updated July 1, 2025.

Round-trip from

$219
(Priceline)

One-way from

$112
(Priceline)

Popular in

November

Cheapest in

August

Average price

$457
From Philadelphia to Idaho
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One-way flight from Philadelphia to Idaho
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Highest demand for flights based on searches. 18% potential increase in price ($111 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Philadelphia to Idaho

Cheapest flights from Philadelphia to Idaho
Explore the most affordable flight options available from Philadelphia to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

This Priceline deal was found by Cheapflights users on 6/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/196:45 amPHL - BOI
1 stop6h 55mFrontier
Sun 9/2112:25 pmBOI - PHL
1 stop10h 32mFrontier
Deal found 6/29$219
This American Airlines deal was found by Cheapflights users on 6/29. 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 9/165:00 amPHL - JAC
1 stop7h 19mAmerican Airlines
Tue 9/237:39 amJAC - PHL
1 stop9h 40mAmerican Airlines
Deal found 6/29$241
This Delta deal was found by Cheapflights users on 7/1. 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 10/217:00 amPHL - JAC
1 stop9h 03mDelta
Fri 10/246:45 pmJAC - PHL
1 stop9h 01mDelta
Deal found 7/1$257
This FlightHub deal was found by Cheapflights users on 6/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/189:00 amPHL - BOI
1 stop10h 11mSpirit Airlines
Mon 8/256:06 pmBOI - PHL
1 stop27h 53mSpirit Airlines
Deal found 6/30$277
This FlightHub deal was found by Cheapflights users on 6/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/226:15 amPHL - GEG
1 stop7h 51mFrontier
Tue 7/2911:51 amGEG - PHL
1 stop14h 18mFrontier
Deal found 6/29$297
This WAYA deal was found by Cheapflights users on 7/1. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/149:00 amPHL - BOI
1 stop10h 11mMultiple Airlines
Thu 8/216:06 pmBOI - PHL
1 stop9h 39mMultiple Airlines
Deal found 7/1$312
This American Airlines deal was found by Cheapflights users on 6/30. 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 8/126:38 amPHL - GEG
1 stop8h 01mAmerican Airlines
Sat 8/303:10 pmGEG - PHL
1 stop11h 15mAmerican Airlines
Deal found 6/30$323
This Delta deal was found by Cheapflights users on 6/30. 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 8/126:00 amPHL - GEG
2 stops10h 16mDelta
Sat 8/3012:45 pmGEG - PHL
1 stop9h 11mDelta
Deal found 6/30$328
This United Airlines deal was found by Cheapflights users on 6/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/123:39 pmPHL - JAC
1 stop7h 12mUnited Airlines
Tue 8/191:40 pmJAC - PHL
2 stops8h 40mUnited Airlines
Deal found 6/30$330
This Mytrip deal was found by Cheapflights users on 6/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/219:00 amPHL - GEG
2 stops29h 35mMultiple Airlines
Sun 8/243:08 pmGEG - PHL
2 stops15h 48mMultiple Airlines
Deal found 6/30$341
This Delta deal was found by Cheapflights users on 6/30. 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 7/297:10 amPHL - SUN
1 stop9h 25mDelta
Tue 8/57:30 amSUN - PHL
1 stop8h 15mDelta
Deal found 6/30$341
This Alaska Airlines deal was found by Cheapflights users on 6/29. 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 10/97:23 pmPHL - GEG
1 stop7h 55mAlaska Airlines
Mon 10/135:54 pmGEG - PHL
1 stop8h 46mAlaska Airlines
Deal found 6/29$342

Cheapflights Fare Finder

Customize your flight search to find flights from Philadelphia 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 July 1, 2025.
Use the filters below to find and compare flights from Philadelphia to Idaho that are best for you.

Fly from

Philadelphia

Fly to

Idaho

Route

Depart

Return

Price

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Fri 9/19

6:45 am-11:40 am

1 stop6h 55m

Boise Air Term. Gowen Fld

Sun 9/21

12:25 pm-12:57 am

1 stop10h 32m

$219

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Tue 9/16

5:00 am-10:19 am

1 stop7h 19m

Jackson Hole

Tue 9/23

7:39 am-7:19 pm

1 stop9h 40m

$241

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Tue 10/21

7:00 am-2:03 pm

1 stop9h 03m

Jackson Hole

Wed 10/29

7:30 am-5:46 pm

1 stop8h 16m

$257

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Mon 8/18

9:00 am-5:11 pm

1 stop10h 11m

Boise Air Term. Gowen Fld

Mon 8/25

6:06 pm-11:59 pm

1 stop27h 53m

$277

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 7/22

6:15 am-11:06 am

1 stop7h 51m

Spokane

Tue 7/29

11:51 am-5:09 am

1 stop14h 18m

$297

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 8/14

9:00 am-5:11 pm

1 stop10h 11m

Boise Air Term. Gowen Fld

Thu 8/21

6:06 pm-5:45 am

1 stop9h 39m

$312

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 8/12

6:38 am-11:39 am

1 stop8h 01m

Spokane

Sat 8/30

3:10 pm-5:25 am

1 stop11h 15m

$323

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 8/12

6:00 am-1:16 pm

2 stops10h 16m

Spokane

Sat 8/30

2:21 pm-11:51 pm

1 stop6h 30m

$328

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Tue 8/12

3:39 pm-8:51 pm

1 stop7h 12m

Jackson Hole

Tue 8/19

1:40 pm-12:20 am

2 stops8h 40m

$330

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 8/21

9:00 am-11:35 am

2 stops29h 35m

Spokane

Sun 8/24

3:08 pm-9:56 am

2 stops15h 48m

$341

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 53 results
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Best time to book a flight from Philadelphia to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Philadelphia 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 Philadelphia to Idaho

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

Currently, October is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $314). Flying from Philadelphia to Idaho in June is currently the most expensive (average of $398). 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 PHL to ID?

Find hourly flight availability from Philadelphia 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 July 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to Idaho as you normally would.

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 July 1, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from Philadelphia to Idaho to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,974 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,538 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,858 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Philadelphia to Idaho?

    Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to Idaho. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.

  • What are the cheapest airlines to fly from Philadelphia to Idaho one-way?

    The cheapest airlines for a one-way flight from Philadelphia to Idaho are Frontier ($112), Delta ($129), and Spirit Airlines ($130).

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

    While some choose either Philadelphia - Boise Air Term. Gowen Fld or Philadelphia - Spokane, Philadelphia - Jackson Hole is the most popular route from Philadelphia to Idaho.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $314). Flying from Philadelphia to Idaho in June is currently the most expensive (average of $398). 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.

See more FAQs

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Alternative routes for Philadelphia to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Philadelphia to Idaho

Discover the top 5 airlines that operate flights from Philadelphia 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$160Average$367FlexibilityNo cancel feeOn-time65%
DeltaCheapest$301Average$603FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$326Average$556FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$362Average$448FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$429Average$731FlexibilityNo cancel feeOn-time69%

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