Idaho

$111+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Jun 9 — Jun 161
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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 May 10, 2026.

This Frontier deal was found by Cheapflights users on 5/10. 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.
Thu 6/48:35 pm
PHL
-
GEG
1 stop18h 03m
Frontier
Wed 6/1012:31 pm
GEG
-
PHL
1 stop20h 16m
Frontier
Deal found 5/10$226
This Booking.com deal was found by Cheapflights users on 5/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/18:35 pm
PHL
-
BOI
1 stop17h 55m
Frontier
Tue 6/91:25 pm
BOI
-
PHL
1 stop20h 22m
Frontier
Deal found 5/6$237
This Frontier deal was found by Cheapflights users on 5/10. 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.
Mon 6/18:35 pm
PHL
-
BOI
1 stop17h 55m
Frontier
Sun 6/71:33 pm
BOI
-
PHL
1 stop14h 04m
Frontier
Deal found 5/10$246
This Frontier deal was found by Cheapflights users on 5/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/248:35 pm
PHL
-
GEG
1 stop18h 03m
Frontier
Mon 6/112:33 pm
GEG
-
PHL
1 stop14h 04m
Frontier
Deal found 5/6$261
This Booking.com deal was found by Cheapflights users on 5/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/28:35 pm
PHL
-
GEG
1 stop18h 03m
Frontier
Mon 6/812:33 pm
GEG
-
PHL
1 stop20h 14m
Frontier
Deal found 5/9$262
This Delta deal was found by Cheapflights users on 5/6. 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.
Tue 9/16:15 am
PHL
-
GEG
1 stop9h 52m
Delta
Tue 9/82:05 pm
GEG
-
PHL
1 stop6h 35m
Delta
Deal found 5/6$279
This Delta deal was found by Cheapflights users on 5/9. 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.
Sat 8/226:00 am
PHL
-
BOI
1 stop8h 49m
Delta
Sat 8/295:10 am
BOI
-
PHL
1 stop9h 17m
Delta
Deal found 5/9$279
This Delta deal was found by Cheapflights users on 5/6. 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 8/262:31 pm
PHL
-
GEG
2 stops11h 38m
Delta
Tue 9/85:40 pm
GEG
-
PHL
1 stop9h 25m
Delta
Deal found 5/6$284
This Delta deal was found by Cheapflights users on 5/8. 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.
Wed 7/86:57 pm
PHL
-
GEG
1 stop7h 09m
Delta
Tue 7/284:30 pm
GEG
-
PHL
1 stop9h 59m
Delta
Deal found 5/8$289
This Delta deal was found by Cheapflights users on 5/7. 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.
Thu 9/37:05 am
PHL
-
BOI
1 stop9h 17m
Delta
Sat 9/193:25 pm
BOI
-
PHL
1 stop6h 15m
Delta
Deal found 5/7$289
This Delta deal was found by Cheapflights users on 5/6. 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.
Sun 5/245:45 am
PHL
-
GEG
2 stops12h 46m
Delta
Mon 6/17:23 pm
GEG
-
PHL
2 stops12h 07m
Delta
Deal found 5/6$290
This Delta deal was found by Cheapflights users on 5/8. 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.
Wed 7/812:36 pm
PHL
-
GEG
2 stops13h 30m
Delta
Thu 7/304:30 pm
GEG
-
PHL
2 stops10h 45m
Delta
Deal found 5/8$300

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 May 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$237
(Booking.com)

One-way from

$111
(Booking.com)

Popular in

June

Cheapest in

September

Average price

$436
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. 8% potential increase in price ($43 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 May 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 May 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

Tue 7/21

5:15 am-11:40 am

1 stop9h 25m

Spokane

Tue 7/28

4:30 pm-5:29 am

1 stop9h 59m

$279

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 7/29

6:57 pm-11:46 pm

1 stop6h 49m

Boise Air Term. Gowen Fld

Mon 8/3

6:44 pm-6:05 am

1 stop9h 21m

$279

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 6/2

7:01 pm-11:06 pm

1 stop7h 05m

Spokane

Mon 6/8

5:10 pm-9:34 am

2 stops13h 24m

$284

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 7/14

5:15 am-4:08 pm

2 stops13h 53m

Spokane

Thu 7/30

10:48 pm-9:31 am

1 stop7h 43m

$294

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Mon 9/21

6:40 pm-11:35 pm

1 stop7h 55m

Spokane

Sat 10/3

7:00 am-12:27 am

2 stops14h 27m

$294

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 7/11

6:00 am-1:21 pm

2 stops10h 21m

Spokane

Tue 7/28

4:30 pm-5:29 am

1 stop9h 59m

$294

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 9/22

4:44 pm-11:14 pm

1 stop9h 30m

Spokane

Wed 9/23

5:09 am-3:44 pm

1 stop7h 35m

$312

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Fri 9/11

7:05 am-1:02 pm

1 stop8h 57m

Spokane

Sat 9/19

5:40 pm-6:05 am

1 stop9h 25m

$312

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 8/5

5:15 am-11:28 am

1 stop9h 13m

Spokane

Wed 8/12

5:39 pm-5:40 am

1 stop9h 01m

$317

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 8/4

5:15 am-4:09 pm

2 stops13h 54m

Spokane

Fri 8/14

5:14 pm-6:05 am

1 stop9h 51m

$317

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/9

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

How far ahead should I book a flight from Philadelphia to Idaho?

The price you pay for your flight from Philadelphia to Idaho may vary depending on when you book. For the best chance of a lower fare, look to book 41 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Philadelphia to Idaho?

Currently, August is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $131). Flying from Philadelphia to Idaho in December is currently the most expensive (average of $446). 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 May 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.

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

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.

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

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.

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

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.

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

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.

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

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 11m. 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 Delta ($168), American Airlines ($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, August is the cheapest month in which you can book a flight from Philadelphia to Idaho (average of $131). Flying from Philadelphia to Idaho in December is currently the most expensive (average of $446). 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 May 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$175Average$494FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$283Average$487FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$336Average$583FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$371Average$486FlexibilityNo cancel feeOn-time63%

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