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$153+ 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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
oct. 17 — oct. 241
vie. 10/17
vie. 10/24
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 septiembre 17, 2025.

Round-trip from

$214
(Frontier)

One-way from

$153
(Delta)

Popular in

December

Cheapest in

August

Average price

$365
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. 13% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 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 septiembre 17, 2025.

This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/236:42 amPHL - GEG
1 stop7h 26mFrontier
jue. 10/3012:03 pmGEG - PHL
1 stop13h 46mFrontier
Deal found 9/15$214
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/236:42 amPHL - GEG
1 stop7h 26mFrontier
dom. 11/212:03 pmGEG - PHL
1 stop13h 46mFrontier
Deal found 9/15$230
This Priceline deal was found by Cheapflights users on 9/16. 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.
jue. 9/256:45 amPHL - GEG
1 stop7h 13mFrontier
jue. 10/211:53 amGEG - PHL
1 stop10h 04mFrontier
Deal found 9/16$312
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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.
mar. 10/147:11 pmPHL - GEG
1 stop8h 16mAlaska Airlines
mar. 10/217:30 amGEG - PHL
1 stop7h 41mAlaska Airlines
Deal found 9/16$316
This Delta deal was found by Cheapflights users on 9/15. 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.
mié. 10/225:30 amPHL - GEG
1 stop9h 11mDelta
mié. 10/292:17 pmGEG - PHL
1 stop6h 32mDelta
Deal found 9/15$317
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/12:45 pmPHL - BOI
2 stops22h 52mFrontier
dom. 10/512:22 pmBOI - PHL
2 stops26h 10mFrontier
Deal found 9/16$320
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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.
mié. 10/157:00 amPHL - GEG
1 stop8h 37mAlaska Airlines
sáb. 10/185:54 pmGEG - PHL
1 stop8h 46mAlaska Airlines
Deal found 9/16$326
This Delta deal was found by Cheapflights users on 9/15. 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.
mié. 10/226:00 amPHL - GEG
2 stops10h 05mDelta
mar. 10/284:50 pmGEG - PHL
2 stops13h 40mDelta
Deal found 9/15$327
This American Airlines deal was found by Cheapflights users on 9/15. 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.
mar. 10/75:00 amPHL - BOI
1 stop9h 38mAmerican Airlines
lun. 10/205:20 pmBOI - PHL
1 stop9h 47mAmerican Airlines
Deal found 9/15$327
This Frontier deal was found by Cheapflights users on 9/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/66:19 amPHL - GEG
1 stop7h 49mFrontier
dom. 11/912:03 pmGEG - PHL
1 stop13h 46mFrontier
Deal found 9/16$329
This Delta deal was found by Cheapflights users on 9/15. 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.
mié. 10/226:50 amPHL - GEG
1 stop7h 51mDelta
vie. 10/3112:51 pmGEG - PHL
1 stop7h 53mDelta
Deal found 9/15$330
This Delta deal was found by Cheapflights users on 9/15. 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.
mar. 10/77:00 pmPHL - BOI
1 stop6h 54mDelta
lun. 10/207:45 pmBOI - PHL
2 stops10h 56mDelta
Deal found 9/15$332

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 septiembre 17, 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

mié. 10/22

5:30 am-11:41 am

1 stop9h 11m

Spokane

mié. 10/29

2:17 pm-11:49 pm

1 stop6h 32m

$317

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mié. 10/22

6:20 am-11:43 am

1 stop8h 23m

Spokane

mar. 10/28

12:33 pm-1:09 am

1 stop9h 36m

$317

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mar. 10/28

11:49 am-9:05 pm

2 stops12h 16m

Spokane

mar. 11/4

6:00 am-5:38 pm

1 stop8h 38m

$322

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mié. 10/22

5:30 am-11:41 am

1 stop9h 11m

Spokane

mar. 10/28

9:22 am-12:52 am

2 stops12h 30m

$322

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mié. 10/22

8:00 am-7:46 pm

2 stops14h 46m

Spokane

mar. 11/4

2:17 pm-11:49 pm

1 stop6h 32m

$322

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mié. 10/15

7:00 am-12:37 pm

1 stop8h 37m

Spokane

sáb. 10/18

5:54 pm-5:40 am

1 stop8h 46m

$326

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

mar. 10/7

5:00 am-12:38 pm

1 stop9h 38m

Boise Air Term. Gowen Fld

lun. 10/20

5:20 pm-5:07 am

1 stop9h 47m

$327

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mié. 10/22

6:50 am-11:41 am

1 stop7h 51m

Spokane

jue. 10/30

5:45 am-6:07 pm

1 stop9h 22m

$327

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mar. 10/28

7:05 am-12:01 pm

1 stop7h 56m

Spokane

jue. 10/30

6:00 am-5:38 pm

1 stop8h 38m

$327

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

sáb. 10/25

7:05 am-12:01 pm

1 stop7h 56m

Spokane

mié. 10/29

2:17 pm-11:49 pm

1 stop6h 32m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 58 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 septiembre 17, 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 septiembre 17, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines 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.
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,961 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,926 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

  • How long is the flight from Philadelphia to Idaho?

    Departing from Philadelphia to Idaho will take you 8h 23m. There are 2147 mi between Philadelphia and Idaho. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 Delta ($153), Hawaiian Airlines ($158), and American Airlines ($159).

  • 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 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 septiembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$314Average$590FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$316Average$536FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$364Average$449FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$367Average$658FlexibilityNo cancel feeOn-time69%

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