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$139+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — PHL
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$241
(American Airlines)

One-way from

$145
(Frontier)

Popular in

October

Cheapest in

January

Average price

$525
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 ($40 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 July 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 July 31, 2025.

This American Airlines deal was found by Cheapflights users on 7/30. 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 9/54:18 pmJAC - PHL
1 stop6h 52mAmerican Airlines
Mon 9/85:00 amPHL - JAC
1 stop7h 19mAmerican Airlines
Deal found 7/30$241
This Delta deal was found by Cheapflights users on 7/30. 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 9/46:52 pmJAC - PHL
1 stop8h 53mDelta
Mon 9/82:35 pmPHL - JAC
1 stop7h 18mDelta
Deal found 7/30$257
This Trip.com deal was found by Cheapflights users on 7/29. 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 8/146:06 pmBOI - PHL
1 stop9h 43mMultiple Airlines
Thu 8/217:15 amPHL - BOI
1 stop11h 56mMultiple Airlines
Deal found 7/29$270
This Frontier deal was found by Cheapflights users on 7/28. 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
Tue 8/126:15 amPHL - GEG
1 stop7h 51mFrontier
Deal found 7/28$278
This Mytrip deal was found by Cheapflights users on 7/29. 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 8/146:06 pmBOI - PHL
2 stops13h 50mSpirit Airlines
Thu 8/219:00 amPHL - BOI
1 stop10h 11mSpirit Airlines
Deal found 7/29$296
This Hawaiian Airlines deal was found by Cheapflights users on 7/31. 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 10/225:54 pmGEG - PHL
1 stop8h 46mHawaiian Airlines
Wed 10/297:02 amPHL - GEG
1 stop8h 24mHawaiian Airlines
Deal found 7/31$322
This Delta deal was found by Cheapflights users on 7/29. 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 10/226:00 amGEG - PHL
1 stop8h 38mDelta
Wed 10/296:45 amPHL - GEG
1 stop7h 56mDelta
Deal found 7/29$323
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 10/17:17 pmBOI - PHL
1 stop8h 45mAlaska Airlines
Wed 10/87:00 amPHL - BOI
1 stop9h 36mAlaska Airlines
Deal found 7/30$324
This Delta deal was found by Cheapflights users on 7/30. 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 8/231:35 pmBOI - PHL
1 stop9h 21mDelta
Sat 8/306:59 pmPHL - BOI
1 stop6h 57mDelta
Deal found 7/30$325
This American Airlines deal was found by Cheapflights users on 7/31. 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 12/43:37 pmGEG - PHL
1 stop10h 49mAmerican Airlines
Mon 12/83:40 pmPHL - GEG
1 stop10h 26mAmerican Airlines
Deal found 7/31$337
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 10/39:25 amGEG - PHL
1 stop17h 22mAlaska Airlines
Tue 10/77:00 amPHL - GEG
1 stop8h 37mAlaska Airlines
Deal found 7/30$349
This Mytrip deal was found by Cheapflights users on 7/29. 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.
Mon 8/189:55 amGEG - PHL
3 stops34h 25mMultiple Airlines
Wed 8/207:07 pmPHL - GEG
2 stops23h 55mMultiple Airlines
Deal found 7/29$362

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 July 31, 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

JacksonPhiladelphia

JAC - PHL

JACPHL

Jackson Hole

Fri 9/5

4:18 pm-1:10 am

1 stop6h 52m

Philadelphia

Mon 9/8

5:00 am-10:19 am

1 stop7h 19m

$241

JacksonPhiladelphia

JAC - PHL

JACPHL

Jackson Hole

Thu 9/4

6:52 pm-5:45 am

1 stop8h 53m

Philadelphia

Mon 9/8

2:35 pm-7:53 pm

1 stop7h 18m

$257

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Thu 8/14

6:06 pm-5:49 am

1 stop9h 43m

Philadelphia

Thu 8/21

7:15 am-5:11 pm

1 stop11h 56m

$270

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Thu 8/14

6:06 pm-9:56 am

2 stops13h 50m

Philadelphia

Thu 8/21

9:00 am-5:11 pm

1 stop10h 11m

$296

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Wed 10/22

5:54 pm-5:40 am

1 stop8h 46m

Philadelphia

Wed 10/29

7:02 am-1:58 pm

1 stop9h 56m

$322

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Wed 10/22

12:51 pm-12:52 am

1 stop9h 01m

Philadelphia

Wed 10/29

5:40 am-11:41 am

1 stop9h 01m

$323

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Wed 10/1

7:17 pm-6:02 am

1 stop8h 45m

Philadelphia

Wed 10/8

7:00 am-2:36 pm

1 stop9h 36m

$324

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Sat 8/23

1:35 pm-12:56 am

1 stop9h 21m

Philadelphia

Sat 8/30

6:59 pm-11:56 pm

1 stop6h 57m

$325

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Thu 12/4

3:37 pm-5:26 am

1 stop10h 49m

Philadelphia

Mon 12/8

7:20 am-12:59 pm

1 stop8h 39m

$337

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Fri 10/3

9:25 am-5:47 am

1 stop17h 22m

Philadelphia

Tue 10/7

7:00 am-12:37 pm

1 stop8h 37m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 47 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 July 31, 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.

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 July 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Idaho to Philadelphia have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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?

    $145 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and Spirit Airlines, with prices starting from $146 and $152, 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 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
Cherry Hill
Ocean City
Chester
Millville
Reading
Ephrata
Camden
Dewey Beach
Dover
Elkton
Essington
Willow Grove
Newark
Exton
Glen Mills
Springfield

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Idaho to Philadelphia

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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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$248FlexibilityNo cancel feeOn-time62%
DeltaCheapest$259Average$455FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$326Average$565FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$332Average$481FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$367Average$502FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$411Average$677FlexibilityNo cancel feeOn-time69%

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