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Idaho

$94+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Jul 16 — Jul 231
Wed 7/16
Wed 7/23
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 11, 2025.

Round-trip from

$187
(American Airlines)

One-way from

$94
(American Airlines)

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 11, 2025.

This American Airlines deal was found by Cheapflights users on 7/9. 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 8/126:00 amPHL - GEG
1 stop9h 22mAmerican Airlines
Sat 8/303:10 pmGEG - PHL
1 stop11h 15mAmerican Airlines
Deal found 7/9$187
This Delta deal was found by Cheapflights users on 7/8. 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.
Wed 9/37:00 amPHL - GEG
1 stop7h 56mDelta
Wed 9/1712:40 pmGEG - PHL
1 stop9h 14mDelta
Deal found 7/8$197
This Delta deal was found by Cheapflights users on 7/10. 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.
Wed 8/136:55 pmPHL - BOI
1 stop7h 04mDelta
Sat 8/233:06 pmBOI - PHL
1 stop6h 45mDelta
Deal found 7/10$197
This American Airlines deal was found by Cheapflights users on 7/9. 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 8/122:01 pmPHL - BOI
1 stop8h 09mAmerican Airlines
Tue 8/265:15 pmBOI - PHL
1 stop10h 10mAmerican Airlines
Deal found 7/9$199
This Priceline deal was found by Cheapflights users on 7/8. 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.
Thu 9/116:45 amPHL - BOI
1 stop6h 55mFrontier
Sun 9/2112:25 pmBOI - PHL
1 stop10h 32mFrontier
Deal found 7/8$209
This Priceline deal was found by Cheapflights users on 7/8. 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.
Sun 8/176:15 amPHL - GEG
1 stop7h 48mFrontier
Sun 9/711:53 amGEG - PHL
1 stop10h 04mFrontier
Deal found 7/8$219
This American Airlines deal was found by Cheapflights users on 7/7. 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.
Thu 9/48:55 amPHL - JAC
1 stop9h 14mAmerican Airlines
Wed 9/1012:58 pmJAC - PHL
1 stop9h 20mAmerican Airlines
Deal found 7/7$241
This Southwest deal was found by Cheapflights users on 7/8. 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.
Fri 9/56:40 pmPHL - GEG
1 stop7h 20mSouthwest
Wed 9/105:45 amGEG - PHL
2 stops8h 55mSouthwest
Deal found 7/8$244
This Southwest deal was found by Cheapflights users on 7/10. 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.
Sun 8/245:30 amPHL - BOI
1 stop11h 50mSouthwest
Tue 8/266:00 amBOI - PHL
2 stops9h 40mSouthwest
Deal found 7/10$249
This Delta deal was found by Cheapflights users on 7/7. 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.
Sun 9/75:00 pmPHL - JAC
1 stop6h 29mDelta
Thu 9/116:57 pmJAC - PHL
1 stop8h 48mDelta
Deal found 7/7$257
This Trip.com deal was found by Cheapflights users on 7/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/177:29 amPHL - GEG
1 stop10h 27mMultiple Airlines
Sun 8/243:08 pmGEG - PHL
1 stop11h 37mMultiple Airlines
Deal found 7/8$283
This Trip.com deal was found by Cheapflights users on 7/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/76:15 amPHL - IDA
1 stop12h 49mMultiple Airlines
Thu 8/145:51 pmIDA - PHL
1 stop9h 18mMultiple Airlines
Deal found 7/8$286

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 11, 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

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 8/12

6:00 am-12:22 pm

1 stop9h 22m

Spokane

Sat 8/30

3:10 pm-5:25 am

1 stop11h 15m

$187

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 9/3

7:00 am-11:56 am

1 stop7h 56m

Spokane

Wed 9/17

12:40 pm-12:54 am

1 stop9h 14m

$197

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 8/13

6:55 pm-11:59 pm

1 stop7h 04m

Boise Air Term. Gowen Fld

Sat 8/23

3:06 pm-11:51 pm

1 stop6h 45m

$197

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 8/12

2:01 pm-8:10 pm

1 stop8h 09m

Boise Air Term. Gowen Fld

Tue 8/26

5:15 pm-5:25 am

1 stop10h 10m

$199

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 9/11

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

$209

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sun 8/17

6:15 am-11:03 am

1 stop7h 48m

Spokane

Sun 9/7

11:53 am-12:57 am

1 stop10h 04m

$219

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Thu 9/4

8:55 am-4:09 pm

1 stop9h 14m

Jackson Hole

Wed 9/10

12:58 pm-12:18 am

1 stop9h 20m

$241

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Fri 9/5

6:40 pm-11:00 pm

1 stop7h 20m

Spokane

Wed 9/10

5:45 am-5:40 pm

2 stops8h 55m

$244

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Sun 8/24

5:30 am-3:20 pm

1 stop11h 50m

Boise Air Term. Gowen Fld

Tue 8/26

6:00 am-5:40 pm

2 stops9h 40m

$249

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Sun 9/7

5:00 pm-9:29 pm

1 stop6h 29m

Jackson Hole

Thu 9/11

6:57 pm-5:45 am

1 stop8h 48m

$257

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/8

Showing 1-10 of 50 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 11, 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.

How much does it cost to fly round-trip from Philadelphia to Idaho?

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 11, 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

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

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

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

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
4,250 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

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
7,951 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

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
2,561 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

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
8,846 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

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 American Airlines ($94), Southwest ($99), and Delta ($104).

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

    While some choose either Philadelphia - Spokane or Philadelphia - Boise Air Term. Gowen Fld, 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 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$160Average$367FlexibilityNo cancel feeOn-time65%
DeltaCheapest$301Average$618FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$326Average$556FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$362Average$448FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$429Average$728FlexibilityNo cancel feeOn-time69%

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