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Idaho

$129+ 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
Mar 14 — Mar 211
Sat 3/14
Sat 3/21
1 adult, Economy
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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 February 12, 2026.

This American Airlines deal was found by Cheapflights users on 2/9. 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 3/105:15 pm
PHL
-
BOI
1 stop8h 23m
American Airlines
Wed 4/16:37 pm
BOI
-
PHL
1 stop10h 19m
American Airlines
Deal found 2/9$257
This Delta deal was found by Cheapflights users on 2/9. 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 3/109:41 am
PHL
-
BOI
2 stops9h 37m
Delta
Wed 4/13:01 pm
BOI
-
PHL
1 stop6h 58m
Delta
Deal found 2/9$262
This American Airlines deal was found by Cheapflights users on 2/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/112:00 pm
PHL
-
GEG
1 stop10h 12m
American Airlines
Wed 3/1812:25 pm
GEG
-
PHL
1 stop8h 34m
American Airlines
Deal found 2/11$297
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:49 pm
PHL
-
GEG
1 stop8h 01m
Delta
Wed 3/183:25 pm
GEG
-
PHL
2 stops11h 16m
Delta
Deal found 2/11$302
This Delta deal was found by Cheapflights users on 2/10. 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 3/103:36 pm
PHL
-
BOI
1 stop8h 49m
Delta
Tue 3/178:00 am
BOI
-
PHL
1 stop7h 28m
Delta
Deal found 2/10$317
This American Airlines deal was found by Cheapflights users on 2/9. 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.
Thu 5/76:00 am
PHL
-
BOI
1 stop8h 49m
American Airlines
Tue 5/121:29 pm
BOI
-
PHL
1 stop6h 55m
American Airlines
Deal found 2/9$321
This Delta deal was found by Cheapflights users on 2/9. 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.
Thu 5/76:10 am
PHL
-
BOI
2 stops9h 09m
Delta
Tue 5/126:08 pm
BOI
-
PHL
1 stop9h 36m
Delta
Deal found 2/9$326
This Delta deal was found by Cheapflights users on 2/10. 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.
Wed 3/46:50 pm
PHL
-
GEG
1 stop8h 04m
Delta
Mon 3/910:40 pm
GEG
-
PHL
1 stop7h 42m
Delta
Deal found 2/10$327
This American Airlines deal was found by Cheapflights users on 2/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/95:00 am
PHL
-
JAC
1 stop9h 41m
American Airlines
Mon 4/131:25 pm
JAC
-
PHL
1 stop8h 46m
American Airlines
Deal found 2/10$328
This Delta deal was found by Cheapflights users on 2/8. 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.
Thu 3/56:10 am
PHL
-
GEG
1 stop9h 58m
Delta
Mon 3/95:00 pm
GEG
-
PHL
2 stops13h 22m
Delta
Deal found 2/8$342
This American Airlines deal was found by Cheapflights users on 2/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/62:57 pm
PHL
-
GEG
1 stop9h 15m
American Airlines
Tue 3/106:00 am
GEG
-
PHL
1 stop7h 55m
American Airlines
Deal found 2/11$355
This American Airlines deal was found by Cheapflights users on 2/9. 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 2/243:55 pm
PHL
-
IDA
1 stop9h 29m
American Airlines
Sat 2/282:18 pm
IDA
-
PHL
1 stop8h 36m
American Airlines
Deal found 2/9$359

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 February 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$257
(American Airlines)

One-way from

$129
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$497
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. 6% potential increase in price ($29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 12, 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

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 3/10

9:41 am-5:18 pm

2 stops9h 37m

Boise Air Term. Gowen Fld

Wed 4/1

3:01 pm-11:59 pm

1 stop6h 58m

$262

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 3/11

5:18 pm-11:59 pm

2 stops8h 41m

Boise Air Term. Gowen Fld

Wed 4/1

3:01 pm-11:59 pm

1 stop6h 58m

$262

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 3/11

2:00 pm-9:12 pm

1 stop10h 12m

Spokane

Wed 3/18

12:25 pm-11:59 pm

1 stop8h 34m

$297

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 3/11

6:49 pm-11:50 pm

1 stop8h 01m

Spokane

Wed 3/18

3:25 pm-5:41 am

2 stops11h 16m

$302

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 3/10

3:36 pm-10:25 pm

1 stop8h 49m

Boise Air Term. Gowen Fld

Tue 3/17

8:00 am-5:28 pm

1 stop7h 28m

$317

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Sat 5/2

6:00 am-2:26 pm

2 stops10h 26m

Boise Air Term. Gowen Fld

Sat 5/9

6:00 am-5:09 pm

1 stop9h 09m

$322

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 5/7

6:10 am-1:19 pm

2 stops9h 09m

Boise Air Term. Gowen Fld

Tue 5/12

6:08 pm-5:44 am

1 stop9h 36m

$326

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Wed 3/4

6:50 pm-11:54 pm

1 stop8h 04m

Spokane

Mon 3/9

10:40 pm-9:22 am

1 stop7h 42m

$327

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 4/28

8:00 am-4:48 pm

2 stops10h 48m

Boise Air Term. Gowen Fld

Wed 5/6

8:34 am-5:32 pm

1 stop6h 58m

$343

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 3/5

12:29 pm-11:54 pm

2 stops14h 25m

Spokane

Mon 3/9

7:45 pm-9:22 am

2 stops10h 37m

$347

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

Showing 1-10 of 60 results
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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, 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 February 12, 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
4,280 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

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
4,280 reviews
Southwest
8.0
Very good
4,280 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

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
8,180 reviews
Southwest
8.0
Very good
4,280 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

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
9,279 reviews
Southwest
8.0
Very good
4,280 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

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
11,271 reviews
Southwest
8.0
Very good
4,280 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

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 9h 03m. 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?

    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

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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.
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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 February 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$199Average$539FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$298Average$495FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$358Average$488FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$367Average$610FlexibilityNo cancel feeOn-time69%

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