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$92+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Aug 16 — Aug 231
Sat 8/16
Sat 8/23
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 August 11, 2025.

Round-trip from

$268
(Kiwi.com)

One-way from

$92
(Kiwi.com)

Popular in

November

Cheapest in

September

Average price

$380
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. 17% potential increase in price ($102 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:25 amPHL - BOI
2 stops16h 06mSpirit Airlines
Fri 9/199:26 pmBOI - PHL
1 stop21h 25mSpirit Airlines
Deal found 8/11$268
This Delta deal was found by Cheapflights users on 8/11. 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 9/36:59 pmPHL - GEG
1 stop7h 49mDelta
Wed 9/102:21 pmGEG - PHL
1 stop6h 30mDelta
Deal found 8/11$277
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/32:01 pmPHL - BOI
1 stop8h 01mAmerican Airlines
Wed 9/101:57 pmBOI - PHL
1 stop7h 18mAmerican Airlines
Deal found 8/10$277
This Gotogate deal was found by Cheapflights users on 8/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:45 amPHL - GEG
1 stop7h 13mFrontier
Thu 9/1811:53 amGEG - PHL
1 stop10h 04mFrontier
Deal found 8/9$281
This Priceline deal was found by Cheapflights users on 8/11. 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 52mFrontier
Sun 9/1412:22 pmBOI - PHL
1 stop10h 35mFrontier
Deal found 8/11$281
This United Airlines deal was found by Cheapflights users on 8/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/33:00 pmPHL - BOI
2 stops9h 41mUnited Airlines
Wed 9/107:09 pmBOI - PHL
1 stop8h 17mUnited Airlines
Deal found 8/9$282
This Priceline deal was found by Cheapflights users on 8/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:45 amPHL - BOI
1 stop6h 52mFrontier
Sun 10/512:22 pmBOI - PHL
1 stop10h 35mFrontier
Deal found 8/10$287
This FlightHub deal was found by Cheapflights users on 8/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/289:00 amPHL - BOI
1 stop10h 11mMultiple Airlines
Thu 9/412:22 pmBOI - PHL
1 stop10h 35mMultiple Airlines
Deal found 8/9$290
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:59 pmPHL - GEG
1 stop7h 49mDelta
Mon 9/157:05 pmGEG - PHL
1 stop7h 40mDelta
Deal found 8/9$297
This Delta deal was found by Cheapflights users on 8/11. 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 10/77:00 pmPHL - BOI
1 stop6h 54mDelta
Mon 10/201:39 pmBOI - PHL
1 stop9h 13mDelta
Deal found 8/11$297
This Expedia deal was found by Cheapflights users on 8/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:45 amPHL - BOI
1 stop6h 52mMultiple Airlines
Tue 9/307:17 pmBOI - PHL
1 stop8h 45mMultiple Airlines
Deal found 8/11$301
This Delta deal was found by Cheapflights users on 8/11. 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 9/26:59 pmPHL - BOI
1 stop6h 57mDelta
Sat 9/66:00 amBOI - PHL
2 stops10h 04mDelta
Deal found 8/11$302

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 August 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

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Mon 9/15

6:25 am-8:31 pm

2 stops16h 06m

Boise Air Term. Gowen Fld

Fri 9/19

9:26 pm-8:51 pm

1 stop21h 25m

$268

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 9/3

6:59 pm-11:48 pm

1 stop7h 49m

Spokane

Wed 9/10

2:21 pm-11:51 pm

1 stop6h 30m

$277

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 9/3

2:01 pm-8:02 pm

1 stop8h 01m

Boise Air Term. Gowen Fld

Wed 9/10

1:57 pm-11:15 pm

1 stop7h 18m

$277

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 9/11

6:45 am-10:58 am

1 stop7h 13m

Spokane

Thu 9/18

11:53 am-12:57 am

1 stop10h 04m

$281

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 9/11

6:45 am-11:37 am

1 stop6h 52m

Boise Air Term. Gowen Fld

Sun 9/14

12:22 pm-12:57 am

1 stop10h 35m

$281

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 9/3

2:55 pm-11:00 pm

2 stops10h 05m

Boise Air Term. Gowen Fld

Wed 9/10

3:06 pm-11:51 pm

1 stop6h 45m

$282

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 10/2

6:45 am-11:37 am

1 stop6h 52m

Boise Air Term. Gowen Fld

Sun 10/5

12:22 pm-12:57 am

1 stop10h 35m

$287

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 8/28

9:00 am-5:11 pm

1 stop10h 11m

Boise Air Term. Gowen Fld

Thu 9/4

12:22 pm-12:57 am

1 stop10h 35m

$290

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 9/3

6:59 pm-11:48 pm

1 stop7h 49m

Spokane

Mon 9/15

7:05 pm-5:45 am

1 stop7h 40m

$297

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 10/7

7:00 pm-11:54 pm

1 stop6h 54m

Boise Air Term. Gowen Fld

Mon 10/20

1:39 pm-12:52 am

1 stop9h 13m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 60 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 $399). 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 August 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.

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 August 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

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Southwest
8.0
Very good
4,248 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Delta
8.0
Very good
7,979 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Hawaiian Airlines
7.8
Good
2,647 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
United Airlines
7.4
Good
8,920 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

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 Spirit Airlines ($92), American Airlines ($139), and Frontier ($144).

  • 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 $399). 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 4 airlines flying from Philadelphia to Idaho

Discover the top 4 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 August 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$324Average$641FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$330Average$553FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$362Average$448FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$429Average$732FlexibilityNo cancel feeOn-time69%

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