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$158+ Cheap flights from Idaho to Philadelphia (PHL)

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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — PHL
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Idaho to Philadelphia

Keep the following information in mind while searching for Idaho to Philadelphia flight deals. Data was last updated September 17, 2025.

Round-trip from

$257
(Delta)

One-way from

$158
(Hawaiian Airlines)

Popular in

October

Cheapest in

January

Average price

$460
From Idaho to Philadelphia
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One-way flight from Idaho to Philadelphia
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Highest demand for flights based on searches. 8% potential increase in price ($44 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($18 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 Idaho to Philadelphia

Cheapest flights from Idaho to Philadelphia
Explore the most affordable flight options available from Idaho to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 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.
Thu 10/2312:03 pmGEG - PHL
1 stop14h 16mFrontier
Thu 10/306:19 amPHL - GEG
1 stop7h 49mFrontier
Deal found 9/15$215
This Delta deal was found by Cheapflights users on 9/17. 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.
Fri 11/76:55 pmJAC - PHL
1 stop8h 55mDelta
Sun 11/97:10 amPHL - JAC
1 stop6h 52mDelta
Deal found 9/17$257
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.
Wed 12/101:14 pmGEG - PHL
1 stop7h 41mAmerican Airlines
Tue 12/167:35 amPHL - GEG
1 stop7h 55mAmerican Airlines
Deal found 9/15$317
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:05 amGEG - PHL
1 stop7h 15mSouthwest
Tue 12/162:45 pmPHL - GEG
2 stops10h 40mSouthwest
Deal found 9/15$322
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2312:28 pmBOI - PHL
1 stop14h 51mMultiple Airlines
Thu 10/306:00 amPHL - BOI
2 stops35h 19mMultiple Airlines
Deal found 9/15$323
This Hawaiian 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:28 amBOI - PHL
1 stop9h 44mHawaiian Airlines
Sat 11/157:02 amPHL - BOI
1 stop10h 10mHawaiian 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.
Thu 11/612:51 pmGEG - PHL
1 stop9h 01mDelta
Tue 11/117:10 amPHL - GEG
1 stop7h 53mDelta
Deal found 9/15$327
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/122:16 pmBOI - PHL
1 stop7h 43mAmerican Airlines
Sat 11/151:50 pmPHL - BOI
2 stops10h 42mAmerican Airlines
Deal found 9/16$332
This Hawaiian 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/205:38 pmBOI - PHL
1 stop10h 02mHawaiian Airlines
Thu 10/237:00 amPHL - BOI
1 stop9h 36mHawaiian Airlines
Deal found 9/15$336
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.
Thu 10/231:39 pmBOI - PHL
1 stop9h 13mDelta
Thu 10/305:30 amPHL - BOI
1 stop8h 59mDelta
Deal found 9/15$337
This Delta deal was found by Cheapflights users on 9/17. 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.
Thu 12/42:05 pmGEG - PHL
1 stop6h 51mDelta
Mon 12/87:05 amPHL - GEG
1 stop8h 04mDelta
Deal found 9/17$337
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.
Fri 10/311:20 pmGEG - PHL
1 stop13h 22mAlaska Airlines
Mon 11/37:12 pmPHL - GEG
1 stop8h 10mAlaska Airlines
Deal found 9/16$339

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Philadelphia 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 September 17, 2025.
Use the filters below to find and compare flights from Idaho to Philadelphia that are best for you.

Fly from

Idaho

Fly to

Philadelphia

Route

Depart

Return

Price

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Thu 10/23

12:03 pm-3:00 pm

2 stops23h 57m

Philadelphia

Thu 10/30

6:19 am-11:08 am

1 stop7h 49m

$241

JacksonPhiladelphia

JAC - PHL

JACPHL

Jackson Hole

Fri 11/7

6:55 pm-5:50 am

1 stop8h 55m

Philadelphia

Sun 11/9

7:10 am-12:02 pm

1 stop6h 52m

$257

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Wed 12/10

6:00 am-5:32 pm

1 stop8h 32m

Philadelphia

Mon 12/15

6:15 am-1:08 pm

1 stop9h 53m

$327

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Thu 10/23

1:39 pm-12:52 am

1 stop9h 13m

Philadelphia

Thu 10/30

5:30 am-12:29 pm

1 stop8h 59m

$337

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Thu 12/4

2:05 pm-11:56 pm

1 stop6h 51m

Philadelphia

Mon 12/8

7:05 am-12:09 pm

1 stop8h 04m

$337

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Fri 10/31

1:20 pm-5:42 am

1 stop13h 22m

Philadelphia

Mon 11/3

7:12 pm-12:22 am

1 stop8h 10m

$339

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Wed 11/26

1:14 pm-11:47 pm

1 stop7h 33m

Philadelphia

Mon 12/8

5:10 pm-11:08 pm

1 stop8h 58m

$343

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Fri 10/3

11:53 am-12:57 am

1 stop10h 04m

Philadelphia

Tue 10/14

7:00 am-12:37 pm

1 stop8h 37m

$343

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Thu 12/4

6:35 am-7:50 pm

1 stop10h 15m

Philadelphia

Mon 12/8

5:10 pm-11:08 pm

1 stop8h 58m

$343

JacksonPhiladelphia

JAC - PHL

JACPHL

Jackson Hole

Thu 3/5

1:10 pm-11:26 pm

1 stop8h 16m

Philadelphia

Mon 3/9

6:55 am-1:25 pm

1 stop8h 30m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 60 results
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Best time to book a flight from Idaho to Philadelphia

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

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

Currently, August is the cheapest month in which you can book a flight from Idaho to Philadelphia (average of $236). Flying from Idaho to Philadelphia in March is currently the most expensive (average of $295). 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 ID to PHL?

Find hourly flight availability from Idaho to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

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

Related info for your journey

Find useful and relevant information for your journey from Idaho to Philadelphia. 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 into for flights to Philadelphia from Idaho?

    If you book a flight to Philadelphia from Idaho, you will be flying to Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia.

  • How long is the flight from Idaho to Philadelphia?

    For as low as $257, Frontier can have you in Philadelphia from Idaho in 8h 55m. The distance between Idaho and Philadelphia is about 1833 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $158 is the cheapest one-way deal found within the past few days, from Hawaiian Airlines. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $159 and $164, respectively.

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

    The most popular route from Idaho to Philadelphia is Boise Air Term. Gowen Fld - Philadelphia. You may also consider Spokane - Philadelphia or Idaho Falls Fanning Field - Philadelphia.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Idaho to Philadelphia (average of $236). Flying from Idaho to Philadelphia in March is currently the most expensive (average of $295). 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

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Vineland
Wildwood
King of Prussia
Pottstown
Reading
Dewey Beach
Ephrata
Camden
Ocean City
Cherry Hill
Dover
Elkton
Essington
Willow Grove
Newark
Millville
Chester
Exton
Havre de Grace
Plymouth Meeting

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Top 6 airlines flying from Idaho to Philadelphia

Discover the top 6 airlines that operate flights from Idaho to Philadelphia. 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$248FlexibilityNo cancel feeOn-time62%
DeltaCheapest$228Average$437FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$319Average$552FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$332Average$481FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$386Average$502FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$411Average$664FlexibilityNo cancel feeOn-time69%

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