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$138+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — PHL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$291
(FlightHub)

One-way from

$138
(Mytrip)

Popular in

October

Cheapest in

January

Average price

$492
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. 7% potential increase in price ($37 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/189:49 pmBOI - PHL
1 stop29h 43mSpirit Airlines
Thu 9/256:30 amPHL - BOI
1 stop16h 14mSpirit Airlines
Deal found 6/11$291
This Delta deal was found by Cheapflights users on 6/11. 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.
Mon 8/411:40 pmBOI - PHL
1 stop9h 17mDelta
Mon 8/116:55 pmPHL - BOI
1 stop7h 04mDelta
Deal found 6/11$297
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/113:10 pmGEG - PHL
1 stop11h 15mAmerican Airlines
Sat 8/235:28 pmPHL - GEG
1 stop8h 27mAmerican Airlines
Deal found 6/11$306
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/17:39 pmGEG - PHL
1 stop8h 01mHawaiian Airlines
Sat 11/86:55 pmPHL - GEG
1 stop8h 04mHawaiian Airlines
Deal found 6/11$314
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2712:35 pmGEG - PHL
2 stops14h 00mUnited Airlines
Sun 8/316:30 amPHL - GEG
1 stop7h 57mUnited Airlines
Deal found 6/11$315
This Delta deal was found by Cheapflights users on 6/10. 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.
Sat 11/12:05 pmGEG - PHL
1 stop6h 38mDelta
Sat 11/87:00 amPHL - GEG
2 stops14h 47mDelta
Deal found 6/10$320
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1712:36 pmBOI - PHL
1 stop14h 33mMultiple Airlines
Fri 8/226:30 amPHL - BOI
1 stop16h 14mMultiple Airlines
Deal found 6/10$331
This Delta deal was found by Cheapflights users on 6/11. 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 7/166:53 pmJAC - PHL
1 stop8h 57mDelta
Mon 7/282:29 pmPHL - JAC
1 stop7h 52mDelta
Deal found 6/11$352
This Frontier deal was found by Cheapflights users on 6/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/711:58 amGEG - PHL
1 stop7h 11mFrontier
Sun 8/176:15 amPHL - GEG
1 stop7h 48mFrontier
Deal found 6/10$356
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Fri 8/15:17 pmBOI - PHL
1 stop10h 33mAmerican Airlines
Wed 8/61:55 pmPHL - BOI
1 stop9h 48mAmerican Airlines
Deal found 6/10$357
This Mytrip deal was found by Cheapflights users on 6/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/269:33 amGEG - PHL
1 stop17h 11mMultiple Airlines
Mon 6/308:15 amPHL - GEG
1 stop11h 52mMultiple Airlines
Deal found 6/11$359
This Hawaiian Airlines deal was found by Cheapflights users on 6/10. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/55:45 pmBOI - PHL
1 stop10h 15mHawaiian Airlines
Sun 9/77:20 amPHL - BOI
1 stop9h 40mHawaiian Airlines
Deal found 6/10$366

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 June 12, 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

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Thu 9/18

9:49 pm-5:32 am

1 stop29h 43m

Philadelphia

Thu 9/25

6:30 am-8:44 pm

1 stop16h 14m

$291

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Mon 8/4

11:40 pm-10:57 am

1 stop9h 17m

Philadelphia

Mon 8/11

6:55 pm-11:59 pm

1 stop7h 04m

$297

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Mon 8/11

3:10 pm-5:25 am

1 stop11h 15m

Philadelphia

Sat 8/23

5:28 pm-10:55 pm

1 stop8h 27m

$306

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Sat 11/1

7:39 pm-6:40 am

1 stop8h 01m

Philadelphia

Sat 11/8

6:55 pm-11:59 pm

1 stop8h 04m

$314

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Wed 8/27

12:35 pm-5:35 am

2 stops14h 00m

Philadelphia

Sun 8/31

6:30 am-11:27 am

1 stop7h 57m

$315

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Sat 11/1

2:05 pm-11:43 pm

1 stop6h 38m

Philadelphia

Sat 11/8

7:00 am-6:47 pm

2 stops14h 47m

$320

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Sun 8/17

12:36 pm-5:09 am

1 stop14h 33m

Philadelphia

Fri 8/22

6:30 am-8:44 pm

1 stop16h 14m

$331

JacksonPhiladelphia

JAC - PHL

JACPHL

Jackson Hole

Wed 7/16

6:53 pm-5:50 am

1 stop8h 57m

Philadelphia

Mon 7/28

2:29 pm-8:21 pm

1 stop7h 52m

$352

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Thu 8/7

11:58 am-10:09 pm

1 stop7h 11m

Philadelphia

Sun 8/17

6:15 am-11:03 am

1 stop7h 48m

$356

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Fri 8/1

5:17 pm-5:50 am

1 stop10h 33m

Philadelphia

Wed 8/6

1:55 pm-9:43 pm

1 stop9h 48m

$357

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 50 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 June 12, 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.

Rainfall in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

Temperature in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Philadelphia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated June 12, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Idaho to Philadelphia. In addition to providing an overall rating, 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

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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 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.

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

    $138 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on Alaska Airlines and Delta, with prices starting from $148 and $149, respectively.

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

    The most popular route from Idaho to Philadelphia is Spokane - Philadelphia. You may also consider Boise Air Term. Gowen Fld - Philadelphia or Jackson Hole - 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 Idaho?

Book flights to Idaho if you plan to visit one of these locations
Vineland
Wildwood
Pottstown
King of Prussia
Cherry Hill
Exton
Ocean City
Chester
Essington
Reading
Newark
Middletown
Millville
Ephrata
Camden
Dover
Elkton
Willow Grove
Glen Mills
Springfield

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Alternative routes for Idaho to Philadelphia

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Top 4 airlines flying from Idaho to Philadelphia

Discover the top 4 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$267Average$418FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$326Average$562FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$367Average$502FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$371Average$630FlexibilityNo cancel feeOn-time69%

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