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Idaho

$150+ 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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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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 January 29, 2026.

This Delta deal was found by Cheapflights users on 1/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/227:05 am
PHL
-
GEG
1 stop8h 57m
Delta
Tue 9/2910:45 pm
GEG
-
PHL
1 stop7h 43m
Delta
Deal found 1/28$257
This Delta deal was found by Cheapflights users on 1/27. 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 3/113:36 pm
PHL
-
BOI
1 stop8h 49m
Delta
Wed 4/13:01 pm
BOI
-
PHL
1 stop6h 58m
Delta
Deal found 1/27$257
This Delta deal was found by Cheapflights users on 1/27. 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.
Tue 3/106:05 am
PHL
-
BOI
2 stops9h 59m
Delta
Wed 4/13:01 pm
BOI
-
PHL
1 stop6h 58m
Delta
Deal found 1/27$262
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/225:00 am
PHL
-
JAC
1 stop9h 38m
American Airlines
Sat 2/2812:28 pm
JAC
-
PHL
1 stop9h 22m
American Airlines
Deal found 1/27$289
This United Airlines deal was found by Cheapflights users on 1/27. 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 4/2510:00 am
PHL
-
JAC
2 stops12h 53m
United Airlines
Sat 5/22:30 pm
JAC
-
PHL
1 stop7h 13m
United Airlines
Deal found 1/27$294
This American Airlines deal was found by Cheapflights users on 1/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:05 am
PHL
-
BOI
1 stop7h 58m
American Airlines
Tue 5/121:29 pm
BOI
-
PHL
1 stop8h 29m
American Airlines
Deal found 1/28$296
This American Airlines deal was found by Cheapflights users on 1/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/253:55 pm
PHL
-
BOI
1 stop9h 43m
American Airlines
Thu 2/266:33 pm
BOI
-
PHL
1 stop10h 06m
American Airlines
Deal found 1/28$297
This Delta deal was found by Cheapflights users on 1/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/259:41 am
PHL
-
BOI
2 stops10h 41m
Delta
Thu 2/262:54 pm
BOI
-
PHL
1 stop6h 50m
Delta
Deal found 1/28$302
This American Airlines deal was found by Cheapflights users on 1/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/111:46 pm
PHL
-
BOI
2 stops10h 37m
American Airlines
Wed 4/16:37 pm
BOI
-
PHL
1 stop10h 19m
American Airlines
Deal found 1/28$304
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Sun 3/226:30 am
PHL
-
JAC
1 stop6h 54m
United Airlines
Sat 3/289:05 am
JAC
-
PHL
1 stop6h 09m
United Airlines
Deal found 1/27$308
This Delta deal was found by Cheapflights users on 1/26. 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.
Fri 2/277:00 am
PHL
-
SUN
1 stop9h 40m
Delta
Tue 3/312:41 pm
SUN
-
PHL
1 stop9h 05m
Delta
Deal found 1/26$309
This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/278:02 am
PHL
-
SUN
2 stops16h 02m
United Airlines
Tue 3/32:32 pm
SUN
-
PHL
1 stop7h 00m
United Airlines
Deal found 1/26$314

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$257
(Delta)

One-way from

$150
(Alaska Airlines)

Popular in

January

Cheapest in

September

Average price

$665
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. 20% potential increase in price ($121 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 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

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 3/10

6:05 am-2:04 pm

2 stops9h 59m

Boise Air Term. Gowen Fld

Wed 4/1

3:01 pm-11:59 pm

1 stop6h 58m

$262

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Sun 2/22

5:00 am-12:38 pm

1 stop9h 38m

Jackson Hole

Sat 2/28

12:28 pm-11:50 pm

1 stop9h 22m

$289

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Sat 4/25

6:17 am-3:24 pm

2 stops11h 07m

Jackson Hole

Sat 5/2

2:30 pm-11:43 pm

1 stop7h 13m

$294

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 2/25

9:41 am-6:22 pm

2 stops10h 41m

Boise Air Term. Gowen Fld

Thu 2/26

2:54 pm-11:44 pm

1 stop6h 50m

$302

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Sun 3/22

6:30 am-11:24 am

1 stop6h 54m

Jackson Hole

Sat 3/28

9:05 am-5:14 pm

1 stop6h 09m

$308

PhiladelphiaHailey

PHL - SUN

PHLSUN

Philadelphia

Fri 2/27

8:02 am-10:04 pm

2 stops16h 02m

Hailey Sun Valley-Friedman

Tue 3/3

2:32 pm-11:32 pm

1 stop7h 00m

$314

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 2/26

5:20 pm-11:14 pm

1 stop8h 54m

Spokane

Thu 3/5

12:25 pm-11:53 pm

1 stop8h 28m

$337

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 2/26

12:55 pm-9:12 pm

1 stop11h 17m

Spokane

Mon 3/2

12:25 pm-9:54 pm

1 stop6h 29m

$337

PhiladelphiaIdaho Falls

PHL - IDA

PHLIDA

Philadelphia

Tue 2/24

6:27 am-3:40 pm

2 stops11h 13m

Idaho Falls Fanning Field

Tue 3/3

2:40 pm-11:32 pm

1 stop6h 52m

$339

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 2/26

6:10 am-1:08 pm

1 stop9h 58m

Spokane

Mon 3/2

7:30 pm-11:43 am

2 stops13h 13m

$342

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

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 January 29, 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
4,267 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

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
4,267 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

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
8,128 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

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
9,215 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

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
11,205 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

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 21m. There are 1833 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 American Airlines ($171), Delta ($171), and Southwest ($173).

  • 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.

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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$199Average$525FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$298Average$498FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$358Average$488FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$367Average$627FlexibilityNo cancel feeOn-time69%

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