Idaho

$86+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
May 10 — May 171
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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 April 10, 2026.

This Frontier deal was found by Cheapflights users on 4/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:35 pm
PHL
-
BOI
1 stop17h 52m
Frontier
Sun 5/171:22 pm
BOI
-
PHL
1 stop14h 15m
Frontier
Deal found 4/7$186
This Trip.com deal was found by Cheapflights users on 4/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/228:41 pm
PHL
-
GEG
1 stop17h 08m
Frontier
Sun 4/2611:44 am
GEG
-
PHL
1 stop14h 50m
Frontier
Deal found 4/7$217
This Mytrip deal was found by Cheapflights users on 4/9. 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.
Mon 5/258:35 pm
PHL
-
BOI
1 stop17h 55m
Frontier
Tue 6/21:25 pm
BOI
-
PHL
1 stop14h 12m
Frontier
Deal found 4/9$230
This Kiwi.com deal was found by Cheapflights users on 4/9. 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.
Sun 5/249:12 pm
PHL
-
BOI
2 stops41h 18m
Frontier
Tue 6/21:25 pm
BOI
-
PHL
1 stop14h 12m
Frontier
Deal found 4/9$272
This Alaska Airlines deal was found by Cheapflights users on 4/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:22 am
PHL
-
BOI
1 stop10h 11m
Alaska Airlines
Tue 5/56:08 pm
BOI
-
PHL
1 stop9h 54m
Alaska Airlines
Deal found 4/5$273
This Delta deal was found by Cheapflights users on 4/9. 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 5/46:05 am
PHL
-
GEG
1 stop9h 59m
Delta
Tue 5/127:23 pm
GEG
-
PHL
1 stop7h 14m
Delta
Deal found 4/9$279
This Delta deal was found by Cheapflights users on 4/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:45 am
PHL
-
BOI
1 stop7h 39m
Delta
Thu 8/275:40 am
BOI
-
PHL
1 stop6h 20m
Delta
Deal found 4/5$279
This Delta deal was found by Cheapflights users on 4/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:17 am
PHL
-
GEG
2 stops10h 54m
Delta
Wed 6/102:23 pm
GEG
-
PHL
1 stop6h 36m
Delta
Deal found 4/6$284
This Southwest deal was found by Cheapflights users on 4/5. 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.
Tue 5/55:50 am
PHL
-
BOI
2 stops9h 30m
Southwest
Tue 5/53:15 pm
BOI
-
PHL
1 stop6h 40m
Southwest
Deal found 4/5$284
This American Airlines deal was found by Cheapflights users on 4/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:30 pm
PHL
-
GEG
1 stop8h 40m
American Airlines
Wed 5/131:13 pm
GEG
-
PHL
1 stop7h 46m
American Airlines
Deal found 4/7$285
This Southwest deal was found by Cheapflights users on 4/6. 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.
Mon 4/275:40 am
PHL
-
GEG
2 stops11h 30m
Southwest
Wed 4/295:10 am
GEG
-
PHL
2 stops9h 40m
Southwest
Deal found 4/6$289
This Delta deal was found by Cheapflights users on 4/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/33:44 pm
PHL
-
GEG
2 stops10h 51m
Delta
Thu 6/114:30 pm
GEG
-
PHL
2 stops10h 38m
Delta
Deal found 4/6$290

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 April 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$186
(Frontier)

One-way from

$86
(Booking.com)

Popular in

December

Cheapest in

September

Average price

$454
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. 4% potential increase in price ($22 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Average for round-trip flights in April 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 April 10, 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 5/9

7:10 am-12:13 pm

1 stop8h 03m

Spokane

Mon 5/11

10:40 pm-9:27 am

1 stop7h 47m

$279

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 9/3

4:05 pm-9:29 pm

1 stop8h 24m

Spokane

Mon 9/7

5:40 pm-6:05 am

1 stop9h 25m

$279

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 6/3

12:38 pm-11:35 pm

2 stops13h 57m

Spokane

Thu 6/11

5:37 pm-5:45 am

1 stop9h 08m

$284

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 5/9

7:10 am-12:13 pm

1 stop8h 03m

Spokane

Tue 5/12

7:23 pm-10:30 am

2 stops12h 07m

$284

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 6/3

3:44 pm-11:35 pm

2 stops10h 51m

Spokane

Wed 6/10

10:48 pm-9:34 am

1 stop7h 46m

$284

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 5/5

6:54 pm-11:57 pm

1 stop7h 03m

Boise Air Term. Gowen Fld

Tue 5/12

12:55 pm-12:57 am

2 stops10h 02m

$284

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Sat 8/22

5:15 pm-11:56 pm

2 stops8h 41m

Boise Air Term. Gowen Fld

Sat 8/29

1:15 pm-1:01 am

2 stops9h 46m

$290

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 4/30

2:59 pm-9:05 pm

1 stop9h 06m

Spokane

Thu 5/7

10:40 pm-9:27 am

1 stop7h 47m

$299

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 7/14

7:08 am-3:18 pm

1 stop10h 10m

Boise Air Term. Gowen Fld

Wed 7/22

6:07 pm-5:53 am

1 stop9h 46m

$299

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 4/30

2:59 pm-11:34 pm

2 stops11h 35m

Spokane

Sat 5/2

6:00 am-8:53 pm

2 stops11h 53m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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, May is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $139). Flying from Philadelphia to Idaho in March is currently the most expensive (average of $343). 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.

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

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 April 10, 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.

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

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.

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

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.

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

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.

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

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.

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

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 6h 44m. 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?

  • 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, May is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $139). Flying from Philadelphia to Idaho in March is currently the most expensive (average of $343). 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 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 April 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$175Average$513FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$283Average$491FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$348Average$610FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$371Average$478FlexibilityNo cancel feeOn-time63%

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