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Idaho

$122+ 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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
feb. 7 — feb. 141
sáb. 2/7
sáb. 2/14
1 adult, Economy
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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 enero 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$251
(Southwest)

One-way from

$122
(Kiwi.com)

Popular in

January

Cheapest in

September

Average price

$665
Provider with most accurate pricing for Philadelphia-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Boise Air Term. Gowen Fld flights.
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From Philadelphia to Idaho
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One-way flight from Philadelphia to Idaho
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Highest demand for flights based on searches. 20% potential increase in price ($124 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 enero 8, 2026.

This Southwest deal was found by Cheapflights users on 1/6. 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.
mar. 2/35:00 pmPHL - GEG
1 stop7h 45mSouthwest
mar. 2/1012:10 pmGEG - PHL
1 stop6h 50mSouthwest
Deal found 1/6$251
This Alaska Airlines deal was found by Cheapflights users on 1/8. 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.
mar. 3/106:22 pmPHL - BOI
1 stop17h 18mAlaska Airlines
mié. 4/12:22 pmBOI - PHL
1 stop13h 43mAlaska Airlines
Deal found 1/8$251
This American Airlines deal was found by Cheapflights users on 1/6. 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.
mar. 2/310:25 amPHL - GEG
2 stops11h 24mAmerican Airlines
mar. 2/106:00 amGEG - PHL
1 stop7h 36mAmerican Airlines
Deal found 1/6$256
This Delta deal was found by Cheapflights users on 1/8. 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.
mié. 2/45:40 amPHL - BOI
1 stop8h 50mDelta
mar. 2/109:15 amBOI - PHL
2 stops11h 58mDelta
Deal found 1/8$256
This Southwest deal was found by Cheapflights users on 1/7. 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.
mar. 2/35:00 pmPHL - BOI
1 stop8h 10mSouthwest
jue. 2/512:30 pmBOI - PHL
1 stop7h 45mSouthwest
Deal found 1/7$279
This American Airlines deal was found by Cheapflights users on 1/6. 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.
sáb. 1/245:00 amPHL - JAC
1 stop10h 02mAmerican Airlines
sáb. 1/315:41 pmJAC - PHL
1 stop11h 20mAmerican Airlines
Deal found 1/6$279
This Southwest deal was found by Cheapflights users on 1/5. 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.
jue. 2/55:00 amPHL - BOI
1 stop7h 20mSouthwest
mar. 2/1011:20 amBOI - PHL
1 stop8h 40mSouthwest
Deal found 1/5$280
This United Airlines deal was found by Cheapflights users on 1/7. 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.
mié. 2/410:10 amPHL - GEG
2 stops14h 12mUnited Airlines
mié. 2/115:00 amGEG - PHL
2 stops13h 36mUnited Airlines
Deal found 1/7$282
This Alaska Airlines deal was found by Cheapflights users on 1/7. 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.
dom. 2/17:06 pmPHL - JAC
1 stop18h 02mAlaska Airlines
vie. 2/612:51 pmJAC - PHL
1 stop27h 12mAlaska Airlines
Deal found 1/7$284
This Alaska Airlines deal was found by Cheapflights users on 1/8. 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.
mar. 5/57:22 amPHL - BOI
2 stops16h 49mAlaska Airlines
mar. 5/126:05 pmBOI - PHL
1 stop9h 57mAlaska Airlines
Deal found 1/8$287
This Delta deal was found by Cheapflights users on 1/7. 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.
mar. 2/39:40 amPHL - BOI
2 stops12h 32mDelta
jue. 2/57:25 amBOI - PHL
2 stops14h 31mDelta
Deal found 1/7$290
This American Airlines deal was found by Cheapflights users on 1/8. 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.
jue. 2/512:08 pmPHL - BOI
1 stop9h 17mAmerican Airlines
mar. 2/106:13 amBOI - PHL
1 stop9h 29mAmerican Airlines
Deal found 1/8$292

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 enero 8, 2026.
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

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mar. 2/3

5:00 pm-9:45 pm

1 stop7h 45m

Spokane

mar. 2/10

12:10 pm-10:00 pm

1 stop6h 50m

$251

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

mar. 3/3

3:37 pm-9:32 pm

1 stop7h 55m

Boise Air Term. Gowen Fld

mar. 3/10

2:40 pm-11:30 pm

1 stop6h 50m

$251

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

mar. 3/10

6:22 pm-9:40 am

1 stop17h 18m

Boise Air Term. Gowen Fld

mié. 4/1

2:22 pm-6:05 am

1 stop13h 43m

$251

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

mié. 3/11

6:49 pm-11:59 pm

1 stop7h 10m

Boise Air Term. Gowen Fld

mié. 4/1

5:30 am-7:49 pm

2 stops12h 19m

$256

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

mar. 3/10

1:48 pm-10:23 pm

2 stops10h 35m

Boise Air Term. Gowen Fld

mié. 4/1

1:31 pm-10:45 pm

1 stop7h 14m

$256

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

mar. 3/10

10:28 am-9:09 pm

2 stops12h 41m

Boise Air Term. Gowen Fld

mié. 4/1

5:30 am-7:49 pm

2 stops12h 19m

$262

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

mié. 2/4

9:40 am-8:12 pm

2 stops12h 32m

Boise Air Term. Gowen Fld

mar. 2/10

9:15 am-11:56 pm

2 stops12h 41m

$262

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

dom. 2/1

7:06 pm-11:08 am

1 stop18h 02m

Jackson Hole

vie. 2/6

12:51 pm-6:03 pm

1 stop27h 12m

$279

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

jue. 2/5

5:00 am-10:20 am

1 stop7h 20m

Boise Air Term. Gowen Fld

mar. 2/10

11:20 am-10:00 pm

1 stop8h 40m

$280

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mié. 2/4

10:10 am-9:22 pm

2 stops14h 12m

Spokane

mié. 2/11

5:00 am-9:36 pm

2 stops13h 36m

$282

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

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 October is currently the most expensive (average of $289). 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.

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 enero 8, 2026.
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
4,248 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,025 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,139 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,095 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 45m. 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 Delta ($171), Southwest ($173), and United Airlines ($175).

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

    While some choose either Philadelphia - Boise Air Term. Gowen Fld or Philadelphia - Spokane, 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 October is currently the most expensive (average of $289). 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.

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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 enero 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$270Average$555FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$298Average$501FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$358Average$483FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$367Average$625FlexibilityNo cancel feeOn-time69%

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