Idaho

$120+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Apr 12 — Apr 191
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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 13, 2026.

This Frontier deal was found by Cheapflights users on 3/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:41 pm
PHL
-
GEG
1 stop17h 08m
Frontier
Sun 4/2611:44 am
GEG
-
PHL
1 stop14h 50m
Frontier
Deal found 3/9$200
This Southwest deal was found by Cheapflights users on 3/10. 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 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 3/10$297
This Delta deal was found by Cheapflights users on 3/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:54 pm
PHL
-
GEG
1 stop7h 40m
Delta
Tue 4/212:10 pm
GEG
-
PHL
1 stop6h 48m
Delta
Deal found 3/10$317
This Delta deal was found by Cheapflights users on 3/9. 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.
Tue 5/52:59 pm
PHL
-
BOI
1 stop7h 30m
Delta
Tue 5/126:41 pm
BOI
-
PHL
1 stop9h 29m
Delta
Deal found 3/9$317
This Southwest deal was found by Cheapflights users on 3/12. 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 4/285:50 am
PHL
-
BOI
2 stops9h 30m
Southwest
Sat 5/22:50 pm
BOI
-
PHL
1 stop6h 10m
Southwest
Deal found 3/12$322
This Delta deal was found by Cheapflights users on 3/8. 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.
Tue 4/79:40 am
PHL
-
BOI
2 stops14h 55m
Delta
Tue 4/148:40 pm
BOI
-
PHL
2 stops13h 08m
Delta
Deal found 3/8$327
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:22 am
PHL
-
GEG
1 stop9h 01m
Alaska Airlines
Wed 4/297:41 pm
GEG
-
PHL
1 stop7h 21m
Alaska Airlines
Deal found 3/9$328
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/186:17 am
PHL
-
GEG
2 stops9h 23m
United Airlines
Tue 4/217:00 am
GEG
-
PHL
2 stops13h 43m
United Airlines
Deal found 3/12$331
This Delta deal was found by Cheapflights users on 3/12. 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 5/197:10 am
PHL
-
GEG
1 stop8h 03m
Delta
Tue 5/265:37 pm
GEG
-
PHL
2 stops9h 33m
Delta
Deal found 3/12$333
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Sat 4/188:41 pm
PHL
-
GEG
1 stop17h 08m
Multiple Airlines
Sun 4/269:19 pm
GEG
-
PHL
2 stops35h 32m
Multiple Airlines
Deal found 3/9$336
This Alaska Airlines deal was found by Cheapflights users on 3/11. 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 stop8h 30m
Alaska Airlines
Tue 5/124:38 pm
BOI
-
PHL
1 stop11h 02m
Alaska Airlines
Deal found 3/11$337
This American Airlines deal was found by Cheapflights users on 3/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
PHL
-
GEG
1 stop9h 23m
American Airlines
Sat 5/2312:51 pm
GEG
-
PHL
1 stop8h 45m
American Airlines
Deal found 3/9$338

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 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$200
(Frontier)

One-way from

$120
(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 ($25 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 13, 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

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 4/7

3:40 pm-9:22 pm

1 stop7h 42m

Boise Air Term. Gowen Fld

Tue 4/14

2:37 pm-11:43 pm

1 stop7h 06m

$317
Quickest round-trip

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 4/28

5:50 am-10:55 am

1 stop7h 05m

Boise Air Term. Gowen Fld

Sat 5/2

2:50 pm-11:00 pm

1 stop6h 10m

$317

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Tue 4/28

7:22 am-1:23 pm

1 stop9h 01m

Spokane

Wed 4/29

7:41 pm-6:02 am

1 stop7h 21m

$328

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 4/14

7:25 am-3:29 pm

1 stop10h 04m

Boise Air Term. Gowen Fld

Sat 4/18

6:04 pm-6:05 am

1 stop10h 01m

$337

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Sat 4/18

12:25 pm-9:35 pm

2 stops12h 10m

Spokane

Mon 4/20

2:50 pm-12:35 am

1 stop6h 45m

$343

PhiladelphiaIdaho Falls

PHL - IDA

PHLIDA

Philadelphia

Sat 5/2

9:55 am-3:43 pm

1 stop7h 48m

Idaho Falls Fanning Field

Sat 5/9

2:31 pm-11:43 pm

1 stop7h 12m

$349

PhiladelphiaHailey

PHL - SUN

PHLSUN

Philadelphia

Wed 4/15

8:00 am-1:35 pm

1 stop7h 35m

Hailey Sun Valley-Friedman

Sat 4/18

2:24 pm-11:43 pm

1 stop7h 19m

$369

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Mon 6/1

4:30 pm-12:45 am

2 stops10h 15m

Boise Air Term. Gowen Fld

Wed 6/10

4:05 pm-1:00 am

1 stop6h 55m

$372

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 4/16

5:40 am-9:50 am

1 stop7h 10m

Spokane

Mon 4/20

2:50 pm-12:35 am

1 stop6h 45m

$379

PhiladelphiaJackson

PHL - JAC

PHLJAC

Philadelphia

Sat 5/2

5:30 am-4:13 pm

2 stops12h 43m

Jackson Hole

Wed 5/6

1:09 pm-12:59 am

2 stops9h 50m

$389

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

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

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.

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 13, 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.

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

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 05m. There are 2106 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 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$199Average$540FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$283Average$487FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$350Average$623FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$358Average$488FlexibilityNo cancel feeOn-time63%

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