Idaho

$140+ 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 6/22. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Jun 27 — Jul 41
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Cheap 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 May 28, 2026.

This Delta deal was found by Cheapflights users on 5/26. 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 8/227:00 am
PHL
-
GEG
1 stop8h 16m
Delta
Sat 8/295:39 pm
GEG
-
PHL
1 stop9h 01m
Delta
Deal found 5/26$279
This Delta deal was found by Cheapflights users on 5/23. 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 7/137:05 am
PHL
-
BOI
1 stop10h 06m
Delta
Thu 7/237:28 pm
BOI
-
PHL
1 stop8h 01m
Delta
Deal found 5/23$279
This United Airlines deal was found by Cheapflights users on 5/25. 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.
Sat 8/291:30 pm
PHL
-
BOI
2 stops10h 07m
United Airlines
Sat 9/512:24 pm
BOI
-
PHL
1 stop7h 03m
United Airlines
Deal found 5/25$284
This Delta deal was found by Cheapflights users on 5/26. 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 7/136:55 pm
PHL
-
GEG
1 stop8h 00m
Delta
Wed 7/225:37 pm
GEG
-
PHL
1 stop8h 52m
Delta
Deal found 5/26$289
This Delta deal was found by Cheapflights users on 5/27. 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 7/85:40 am
PHL
-
BOI
1 stop7h 17m
Delta
Wed 7/157:28 pm
BOI
-
PHL
1 stop8h 01m
Delta
Deal found 5/27$289
This Alaska Airlines deal was found by Cheapflights users on 5/26. 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.
Tue 9/14:48 pm
PHL
-
GEG
1 stop9h 23m
Alaska Airlines
Wed 9/25:12 am
GEG
-
PHL
1 stop7h 33m
Alaska Airlines
Deal found 5/26$309
This American Airlines deal was found by Cheapflights users on 5/26. 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.
Tue 9/229:19 am
PHL
-
JAC
1 stop8h 26m
American Airlines
Wed 9/303:41 pm
JAC
-
PHL
1 stop6h 31m
American Airlines
Deal found 5/26$311
This Delta deal was found by Cheapflights users on 5/25. 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 7/105:40 am
PHL
-
BOI
1 stop7h 17m
Delta
Thu 7/167:28 pm
BOI
-
PHL
1 stop8h 01m
Delta
Deal found 5/25$314
This Delta deal was found by Cheapflights users on 5/26. 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.
Sun 9/202:21 pm
PHL
-
JAC
1 stop7h 44m
Delta
Wed 9/307:40 am
JAC
-
PHL
2 stops9h 39m
Delta
Deal found 5/26$316
This United Airlines deal was found by Cheapflights users on 5/27. 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.
Sat 8/226:25 am
PHL
-
BOI
1 stop7h 03m
United Airlines
Sat 8/2910:36 am
BOI
-
PHL
1 stop6h 49m
United Airlines
Deal found 5/27$317
This American Airlines deal was found by Cheapflights users on 5/23. 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 7/34:22 pm
PHL
-
BOI
1 stop9h 00m
American Airlines
Sat 7/113:12 pm
BOI
-
PHL
1 stop7h 34m
American Airlines
Deal found 5/23$321
This Delta deal was found by Cheapflights users on 5/26. 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.
Tue 9/229:35 am
PHL
-
JAC
2 stops12h 30m
Delta
Wed 9/307:40 am
JAC
-
PHL
2 stops9h 39m
Delta
Deal found 5/26$321

Find flight deals from Philadelphia to Idaho

Keep the following information in mind while searching for Philadelphia to Idaho flight deals. Data was last updated May 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$279
(Delta)

One-way from

$140
(Delta)

Popular in

June

Cheapest in

September

Average price

$440
Provider with most accurate pricing for Philadelphia-Boise Air Term. Gowen Fld flight deals.
Provider most trusted by Cheapflights users for Philadelphia-Boise Air Term. Gowen Fld flights.
From Philadelphia to Idaho
One-way flight from Philadelphia to Idaho
Highest demand for flights based on searches. 8% potential increase in price ($44 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Average for round-trip flights in May 2026

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 May 28, 2026.
Use the filters below to find and compare flights from Philadelphia to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 8/22

7:00 am-12:16 pm

1 stop8h 16m

Spokane

Sat 8/29

5:39 pm-5:40 am

1 stop9h 01m

$279

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Mon 7/13

6:55 pm-11:55 pm

1 stop8h 00m

Spokane

Wed 7/22

5:37 pm-5:29 am

1 stop8h 52m

$279

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 7/22

7:05 am-12:11 pm

1 stop8h 06m

Spokane

Mon 7/27

7:08 pm-6:15 am

1 stop8h 07m

$309

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Fri 7/10

5:40 am-10:57 am

1 stop7h 17m

Boise Air Term. Gowen Fld

Thu 7/16

7:28 pm-5:29 am

1 stop8h 01m

$314

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 9/23

6:20 am-1:03 pm

1 stop8h 43m

Boise Air Term. Gowen Fld

Sun 9/27

5:59 pm-5:50 am

1 stop9h 51m

$314

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 7/23

5:40 am-10:57 am

1 stop7h 17m

Boise Air Term. Gowen Fld

Tue 7/28

2:50 pm-11:56 pm

1 stop7h 06m

$339

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Wed 8/26

2:31 pm-8:11 pm

1 stop7h 40m

Jackson Hole

Wed 9/2

7:40 am-5:47 pm

1 stop8h 07m

$365

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Sat 8/29

1:49 pm-8:11 pm

1 stop8h 22m

Jackson Hole

Fri 9/4

8:25 am-6:49 pm

1 stop8h 24m

$365

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Wed 9/9

10:38 am-6:57 pm

2 stops10h 19m

Jackson Hole

Tue 9/15

1:05 pm-12:56 am

2 stops9h 51m

$376

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Mon 6/22

5:40 am-10:58 am

1 stop7h 18m

Boise Air Term. Gowen Fld

Mon 6/29

11:45 pm-9:34 am

1 stop7h 49m

$389

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/25

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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, August is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $131). Flying from Philadelphia to Idaho in December is currently the most expensive (average of $446). 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.

Weekly flight availability from Philadelphia to Idaho

Explore weekly flight availability from Philadelphia to Idaho. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 28, 2026.

The most flights from PHL to USID are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

How much does it cost to fly round-trip from Philadelphia to Idaho?

How far ahead should I book a flight from Philadelphia to Idaho?

The price you pay for your flight from Philadelphia to Idaho may vary depending on when you book. For the best chance of a lower fare, look to book 76 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 May 28, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited 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.

Crew

8.6

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 7h 21m. There are 1847 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 ($159), United Airlines ($170), and American Airlines ($171).

  • What are the most popular routes 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, August is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $131). Flying from Philadelphia to Idaho in December is currently the most expensive (average of $446). 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.

Top 5 airlines flying from Philadelphia to Idaho

Discover the top 5 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 May 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$131Average$291FlexibilityNo cancel feeOn-time62%
DeltaCheapest$175Average$500FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$283Average$506FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$336Average$593FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$350Average$556FlexibilityNo cancel feeOn-time63%

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