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
Apr 26 — May 31
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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 March 27, 2026.

This Booking.com deal was found by Cheapflights users on 3/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/168:35 pm
PHL
-
BOI
1 stop17h 52m
Frontier
Tue 5/191:22 pm
BOI
-
PHL
1 stop14h 15m
Frontier
Deal found 3/23$243
This Delta deal was found by Cheapflights users on 3/26. 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.
Wed 6/36:45 pm
PHL
-
GEG
1 stop7h 50m
Delta
Wed 6/102:23 pm
GEG
-
PHL
1 stop6h 36m
Delta
Deal found 3/26$303
This Delta deal was found by Cheapflights users on 3/24. 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 5/55:30 am
PHL
-
BOI
1 stop9h 37m
Delta
Tue 5/122:23 pm
BOI
-
PHL
1 stop6h 49m
Delta
Deal found 3/24$305
This Southwest deal was found by Cheapflights users on 3/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/185:35 am
PHL
-
GEG
1 stop7h 30m
Southwest
Wed 4/221:45 pm
GEG
-
PHL
1 stop7h 10m
Southwest
Deal found 3/26$330
This American Airlines deal was found by Cheapflights users on 3/26. 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.
Sat 5/27:15 am
PHL
-
BOI
1 stop7h 34m
American Airlines
Wed 5/66:26 pm
BOI
-
PHL
1 stop10h 34m
American Airlines
Deal found 3/26$331
This American Airlines deal was found by Cheapflights users on 3/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:35 pm
PHL
-
GEG
1 stop8h 45m
American Airlines
Thu 6/112:08 pm
GEG
-
PHL
1 stop7h 23m
American Airlines
Deal found 3/25$335
This Delta deal was found by Cheapflights users on 3/26. 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.
Wed 6/312:38 pm
PHL
-
GEG
2 stops13h 57m
Delta
Thu 6/1112:35 pm
GEG
-
PHL
1 stop8h 24m
Delta
Deal found 3/26$340
This Delta deal was found by Cheapflights users on 3/24. 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 4/145:32 pm
PHL
-
GEG
2 stops9h 48m
Delta
Sat 4/181:07 pm
GEG
-
PHL
2 stops13h 52m
Delta
Deal found 3/24$341
This Delta deal was found by Cheapflights users on 3/23. 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.
Wed 5/135:18 pm
PHL
-
GEG
2 stops9h 17m
Delta
Mon 5/185:37 pm
GEG
-
PHL
2 stops12h 18m
Delta
Deal found 3/23$345
This Alaska Airlines deal was found by Cheapflights users on 3/26. 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 10/276:45 am
PHL
-
IDA
1 stop10h 44m
Alaska Airlines
Sat 10/316:15 am
IDA
-
PHL
1 stop8h 41m
Alaska Airlines
Deal found 3/26$349
This Alaska Airlines deal was found by Cheapflights users on 3/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:58 pm
PHL
-
GEG
1 stop7h 57m
Alaska Airlines
Wed 4/297:41 pm
GEG
-
PHL
1 stop7h 21m
Alaska Airlines
Deal found 3/23$352
This Expedia deal was found by Cheapflights users on 3/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/247:00 am
PHL
-
GEG
1 stop9h 04m
Multiple Airlines
Fri 6/512:33 pm
GEG
-
PHL
1 stop14h 04m
Multiple Airlines
Deal found 3/25$354

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 March 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$207
(Booking.com)

One-way from

$86
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$408
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. 5% potential increase in price ($24 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 March 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 March 27, 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

Wed 6/3

5:45 am-12:01 pm

2 stops9h 16m

Spokane

Wed 6/10

4:30 pm-6:08 am

2 stops10h 38m

$313

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 4/18

5:35 am-10:05 am

1 stop7h 30m

Spokane

Wed 4/22

1:45 pm-11:55 pm

1 stop7h 10m

$330

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 5/14

7:01 pm-11:06 pm

1 stop7h 05m

Spokane

Tue 5/19

10:40 pm-11:02 am

1 stop9h 22m

$335

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 5/19

6:35 am-4:13 pm

2 stops12h 38m

Spokane

Sat 5/23

4:15 pm-5:37 am

1 stop10h 22m

$340

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 4/28

6:58 pm-11:55 pm

1 stop7h 57m

Spokane

Wed 4/29

7:41 pm-6:02 am

1 stop7h 21m

$357

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 4/28

3:40 pm-9:22 pm

1 stop7h 42m

Boise Air Term. Gowen Fld

Sat 5/2

2:33 pm-11:43 pm

1 stop7h 10m

$357

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 4/18

5:00 pm-9:15 pm

1 stop7h 15m

Spokane

Sat 4/25

10:45 am-11:00 pm

1 stop9h 15m

$357

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 4/21

5:50 am-10:55 am

1 stop7h 05m

Boise Air Term. Gowen Fld

Tue 4/28

6:40 am-5:50 pm

2 stops9h 10m

$362

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 4/18

12:25 pm-10:33 pm

2 stops13h 08m

Spokane

Sat 4/25

3:33 pm-5:59 am

2 stops11h 26m

$368

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 5/28

2:23 pm-9:20 pm

1 stop9h 57m

Spokane

Mon 6/1

5:39 pm-6:10 am

2 stops9h 31m

$372

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

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, May is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $136). Flying from Philadelphia to Idaho in February is currently the most expensive (average of $298). 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 March 27, 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.

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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.

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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.

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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.

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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.

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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 08m. There are 1899 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?

  • 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 $136). Flying from Philadelphia to Idaho in February is currently the most expensive (average of $298). 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 March 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$175Average$515FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$283Average$489FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$348Average$639FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$371Average$481FlexibilityNo cancel feeOn-time63%

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