HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$115+ 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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Feb 17 — Feb 241
Tue 2/17
Tue 2/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Philadelphia to Idaho with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 January 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$257
(American Airlines)

One-way from

$115
(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.
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 ($120 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 18, 2026.

This American Airlines deal was found by Cheapflights users on 1/17. 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 3/37:14 am
PHL
-
GEG
1 stop7h 30m
American Airlines
Tue 3/106:00 am
GEG
-
PHL
1 stop10h 25m
American Airlines
Deal found 1/17$257
This American Airlines deal was found by Cheapflights users on 1/18. 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 3/103:54 pm
PHL
-
BOI
1 stop9h 44m
American Airlines
Wed 4/11:31 pm
BOI
-
PHL
1 stop7h 14m
American Airlines
Deal found 1/18$257
This Delta deal was found by Cheapflights users on 1/17. 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 3/36:50 pm
PHL
-
GEG
1 stop8h 04m
Delta
Tue 3/106:00 am
GEG
-
PHL
2 stops10h 49m
Delta
Deal found 1/17$262
This Delta deal was found by Cheapflights users on 1/16. 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 2/235:31 am
PHL
-
JAC
1 stop9h 54m
Delta
Wed 3/41:05 pm
JAC
-
PHL
1 stop8h 41m
Delta
Deal found 1/16$289
This American Airlines deal was found by Cheapflights users on 1/18. 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 4/11:31 pm
BOI
-
PHL
1 stop7h 14m
American Airlines
Deal found 1/18$292
This Delta deal was found by Cheapflights users on 1/17. 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 4/165:50 am
PHL
-
JAC
2 stops12h 15m
Delta
Sat 4/187:20 am
JAC
-
PHL
1 stop8h 15m
Delta
Deal found 1/17$294
This Delta deal was found by Cheapflights users on 1/15. 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 2/186:10 am
PHL
-
BOI
1 stop9h 49m
Delta
Tue 3/32:54 pm
BOI
-
PHL
1 stop6h 50m
Delta
Deal found 1/15$297
This American Airlines deal was found by Cheapflights users on 1/17. 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 2/16:21 am
PHL
-
JAC
1 stop10h 21m
American Airlines
Fri 2/61:42 pm
JAC
-
PHL
1 stop8h 13m
American Airlines
Deal found 1/17$297
This United Airlines deal was found by Cheapflights users on 1/17. 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 2/143:37 pm
PHL
-
BOI
1 stop7h 55m
United Airlines
Sat 2/215:00 am
BOI
-
PHL
2 stops10h 14m
United Airlines
Deal found 1/17$298
This Delta deal was found by Cheapflights users on 1/15. 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 2/179:41 am
PHL
-
BOI
2 stops12h 34m
Delta
Tue 3/312:59 pm
BOI
-
PHL
1 stop8h 47m
Delta
Deal found 1/15$302
This American Airlines deal was found by Cheapflights users on 1/15. 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 2/193:55 pm
PHL
-
BOI
1 stop9h 43m
American Airlines
Tue 3/31:30 pm
BOI
-
PHL
1 stop7h 18m
American Airlines
Deal found 1/15$307
This Delta deal was found by Cheapflights users on 1/15. 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 2/179:41 am
PHL
-
BOI
2 stops12h 34m
Delta
Wed 3/410:45 am
BOI
-
PHL
2 stops10h 59m
Delta
Deal found 1/15$308

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 18, 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

Tue 3/3

7:14 am-11:44 am

1 stop7h 30m

Spokane

Tue 3/10

6:00 am-7:25 pm

1 stop10h 25m

$257

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 3/3

6:50 pm-11:54 pm

1 stop8h 04m

Spokane

Tue 3/10

6:00 am-7:49 pm

2 stops10h 49m

$262

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Tue 2/24

7:00 am-12:07 pm

1 stop7h 07m

Jackson Hole

Tue 3/3

2:35 pm-12:24 am

1 stop7h 49m

$289

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 3/11

1:46 pm-10:23 pm

2 stops10h 37m

Boise Air Term. Gowen Fld

Wed 4/1

1:31 pm-10:45 pm

1 stop7h 14m

$292

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Thu 4/16

5:50 am-4:05 pm

2 stops12h 15m

Jackson Hole

Sat 4/18

7:20 am-5:35 pm

1 stop8h 15m

$294

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Mon 2/2

8:00 am-1:30 pm

1 stop7h 30m

Jackson Hole

Fri 2/6

7:20 am-5:25 pm

1 stop8h 05m

$297

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Sat 2/14

3:37 pm-9:32 pm

1 stop7h 55m

Boise Air Term. Gowen Fld

Sat 2/21

5:00 am-5:14 pm

2 stops10h 14m

$298

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Mon 2/2

10:10 am-8:42 pm

2 stops12h 32m

Jackson Hole

Fri 2/6

2:40 pm-11:30 pm

1 stop6h 50m

$302

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Sun 2/1

5:51 am-5:01 pm

2 stops13h 10m

Jackson Hole

Fri 2/6

5:36 pm-7:01 am

1 stop11h 25m

$302

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 2/17

9:41 am-8:15 pm

2 stops12h 34m

Boise Air Term. Gowen Fld

Tue 3/3

12:59 pm-11:46 pm

1 stop8h 47m

$302

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/17

Showing 1-10 of 60 results
1
2
3
...
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, 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 18, 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
4,262 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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
4,262 reviews
Southwest
8.0
Very good
4,262 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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
8,075 reviews
Southwest
8.0
Very good
4,262 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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
9,176 reviews
Southwest
8.0
Very good
4,262 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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
11,160 reviews
Southwest
8.0
Very good
4,262 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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 30m. 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Fort Lauderdale flights
Newark to Miami flights
Newark to Fort Lauderdale flights
John F Kennedy Intl to Miami flights
John F Kennedy Intl to West Palm Beach flights
LaGuardia to Fort Lauderdale flights
LaGuardia to Miami flights
Newark to West Palm Beach flights
John F Kennedy Intl to Orlando flights
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
Newark to Las Vegas flights
Newark to Orlando flights
John F Kennedy Intl to Dallas/Fort Worth flights
Dulles Intl to Miami flights
John F Kennedy Intl to Tampa flights
LaGuardia to Orlando flights
John F Kennedy Intl to Sky Harbor Intl flights
Newark to Tampa flights
Newark to Los Angeles flights
LaGuardia to West Palm Beach flights
Reagan-National to Miami flights
LaGuardia to Tampa flights
Dulles Intl to Orlando flights
John F Kennedy Intl to San Francisco flights
Newark to Dallas/Fort Worth flights
John F Kennedy Intl to Hobby flights
LaGuardia to Dallas/Fort Worth flights
John F Kennedy Intl to O'Hare Intl flights
Dulles Intl to Las Vegas flights
Newark to Sky Harbor Intl flights
John F Kennedy Intl to New Orleans flights
LaGuardia to New Orleans flights
Philadelphia to Orlando flights
Philadelphia to Miami flights
Newark to New Orleans flights
Dulles Intl to Dallas/Fort Worth flights
LaGuardia to Hobby flights
Newark to Hobby flights
Philadelphia to Fort Lauderdale flights
LaGuardia to Los Angeles flights
Dulles Intl to Fort Lauderdale flights
LaGuardia to Las Vegas flights
Newark to Fort Myers flights
Newark to San Francisco flights
John F Kennedy Intl to Denver flights
Dulles Intl to Tampa flights
Reagan-National to Fort Lauderdale flights
Reagan-National to Orlando flights
John F Kennedy Intl to George Bush Intcntl flights

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 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$199Average$525FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$298Average$502FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$358Average$496FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$367Average$627FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.