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$85+ 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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/104:00 pmPHL - BOI
2 stops21h 49mFrontier
Sun 12/1412:44 pmBOI - PHL
1 stop14h 47mFrontier
Deal found 10/29$232
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:00 amPHL - BOI
1 stop15h 59mFrontier
Thu 12/412:44 pmBOI - PHL
2 stops23h 55mFrontier
Deal found 10/28$257
This KAYAK deal was found by Cheapflights users on 10/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:54 pmPHL - GEG
1 stop8h 30mAlaska Airlines
Wed 12/107:15 amGEG - PHL
1 stop7h 38mAlaska Airlines
Deal found 10/30$323
This Delta deal was found by Cheapflights users on 10/30. 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.
Wed 12/36:18 amPHL - GEG
2 stops11h 37mDelta
Wed 12/106:05 amGEG - PHL
2 stops13h 42mDelta
Deal found 10/30$328
This Mytrip deal was found by Cheapflights users on 10/29. 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 10/306:19 amPHL - BOI
1 stop7h 29mFrontier
Thu 11/612:33 pmBOI - PHL
1 stop14h 16mFrontier
Deal found 10/29$330
This United Airlines deal was found by Cheapflights users on 10/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:15 pmPHL - GEG
2 stops10h 44mUnited Airlines
Wed 12/107:00 amGEG - PHL
1 stop9h 41mUnited Airlines
Deal found 10/30$348
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:06 amPHL - BOI
1 stop11h 10mAlaska Airlines
Mon 12/88:26 pmBOI - PHL
1 stop19h 27mAlaska Airlines
Deal found 10/29$350
This Delta deal was found by Cheapflights users on 10/29. 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.
Thu 12/412:22 pmPHL - BOI
2 stops11h 54mDelta
Mon 12/83:13 pmBOI - PHL
1 stop6h 44mDelta
Deal found 10/29$356
This Orbitz deal was found by Cheapflights users on 10/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:00 amPHL - BOI
1 stop7h 53mMultiple Airlines
Tue 12/28:26 pmBOI - PHL
1 stop19h 27mMultiple Airlines
Deal found 10/28$361
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:54 pmPHL - BOI
1 stop28h 51mAlaska Airlines
Mon 12/85:59 pmBOI - PHL
1 stop21h 54mAlaska Airlines
Deal found 10/29$362
This KAYAK deal was found by Cheapflights users on 10/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:54 pmPHL - GEG
1 stop8h 30mAlaska Airlines
Mon 12/1512:34 pmGEG - PHL
2 stops14h 12mAlaska Airlines
Deal found 10/30$363
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/138:05 pmPHL - IDA
1 stop22h 03mMultiple Airlines
Fri 11/1410:56 pmIDA - PHL
1 stop18h 11mMultiple Airlines
Deal found 10/30$370

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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$232
(Kiwi.com)

One-way from

$85
(Frontier)

Popular in

December

Cheapest in

September

Average price

$474
Provider with most accurate pricing for Philadelphia-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Boise Air Term. Gowen Fld flights.
Search Deals
From Philadelphia to Idaho
Search Deals
One-way flight from Philadelphia to Idaho
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 30, 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

Wed 12/10

4:00 pm-11:49 am

2 stops21h 49m

Boise Air Term. Gowen Fld

Sun 12/14

12:44 pm-5:31 am

1 stop14h 47m

$232

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 1/22

7:06 pm-12:23 am

1 stop8h 17m

Spokane

Mon 1/26

5:45 am-6:06 pm

1 stop9h 21m

$322

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Fri 12/5

5:17 pm-12:11 am

2 stops9h 54m

Spokane

Wed 12/10

5:05 am-6:12 pm

2 stops10h 07m

$328

PhiladelphiaHailey

PHL - SUN

PHLSUN

Philadelphia

Wed 1/28

7:06 pm-11:14 am

1 stop18h 08m

Hailey Sun Valley-Friedman

Sat 1/31

11:56 am-6:06 pm

1 stop28h 10m

$340

PhiladelphiaHailey

PHL - SUN

PHLSUN

Philadelphia

Wed 1/28

6:30 am-12:02 pm

1 stop7h 32m

Hailey Sun Valley-Friedman

Sat 1/31

7:00 am-3:50 pm

1 stop6h 50m

$341

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 1/24

7:06 pm-12:23 am

1 stop8h 17m

Spokane

Sat 1/31

7:30 am-6:06 pm

1 stop7h 36m

$342

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 1/24

5:40 am-11:45 am

1 stop9h 05m

Spokane

Sat 1/31

6:30 am-10:03 pm

2 stops12h 33m

$348

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 1/22

10:10 am-7:01 pm

2 stops11h 51m

Spokane

Mon 1/26

6:53 am-9:52 pm

1 stop11h 59m

$348

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 2/17

6:00 am-1:00 pm

2 stops10h 00m

Spokane

Mon 2/23

12:40 pm-12:22 am

1 stop8h 42m

$348

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 12/4

7:06 am-4:16 pm

1 stop11h 10m

Boise Air Term. Gowen Fld

Mon 12/8

8:26 pm-5:53 pm

1 stop19h 27m

$350

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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, February is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $134). Flying from Philadelphia to Idaho in January is currently the most expensive (average of $316). 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 October 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Philadelphia to Idaho at noon. If you’re flexible enough to do this you can expect to save up to 28% on your trip compared to booking a flight in the afternoon.

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 October 30, 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
4,243 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

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
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

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
7.9
Good
7,998 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

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
8,998 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

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
11,035 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

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 17m. 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 Frontier ($123), Alaska Airlines ($168), and Delta ($169).

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

    While some choose either Philadelphia - Spokane or Philadelphia - Boise Air Term. Gowen Fld, 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, February is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $134). Flying from Philadelphia to Idaho in January is currently the most expensive (average of $316). 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$306Average$567FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$316Average$527FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$358Average$448FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$359Average$656FlexibilityNo cancel feeOn-time69%

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