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$99+ 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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
ene. 4 — ene. 111
dom. 1/4
dom. 1/11
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 diciembre 5, 2025.

This United Airlines deal was found by Cheapflights users on 12/3. 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.
jue. 12/189:45 amPHL - JAC
1 stop9h 40mUnited Airlines
dom. 12/216:06 pmJAC - PHL
1 stop9h 26mUnited Airlines
Deal found 12/3$359
This Delta deal was found by Cheapflights users on 12/3. 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.
jue. 12/1811:46 amPHL - JAC
2 stops11h 43mDelta
dom. 12/211:55 pmJAC - PHL
1 stop8h 00mDelta
Deal found 12/3$364
This Southwest deal was found by Cheapflights users on 12/3. 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.
mié. 12/315:00 pmPHL - GEG
1 stop8h 25mSouthwest
mié. 1/76:20 amGEG - PHL
1 stop7h 00mSouthwest
Deal found 12/3$367
This United Airlines deal was found by Cheapflights users on 12/4. 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.
mar. 12/168:00 amPHL - JAC
1 stop9h 24mUnited Airlines
lun. 12/2210:37 amJAC - PHL
2 stops12h 08mUnited Airlines
Deal found 12/4$384
This American Airlines deal was found by Cheapflights users on 12/3. 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.
mié. 12/313:55 pmPHL - BOI
1 stop9h 04mAmerican Airlines
mié. 1/712:37 pmBOI - PHL
1 stop9h 14mAmerican Airlines
Deal found 12/3$404
This Southwest deal was found by Cheapflights users on 12/3. 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.
mar. 12/305:40 amPHL - GEG
2 stops10h 30mSouthwest
mié. 1/76:20 amGEG - PHL
2 stops11h 00mSouthwest
Deal found 12/3$426
This United Airlines deal was found by Cheapflights users on 12/3. 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.
mié. 12/316:35 amPHL - BOI
1 stop8h 07mUnited Airlines
mié. 1/710:15 amBOI - PHL
2 stops11h 15mUnited Airlines
Deal found 12/3$444
This Southwest deal was found by Cheapflights users on 12/3. 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.
mar. 12/305:40 amPHL - GEG
2 stops10h 30mSouthwest
mar. 1/612:10 pmGEG - PHL
1 stop6h 50mSouthwest
Deal found 12/3$446
This Delta deal was found by Cheapflights users on 12/3. 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.
mié. 12/316:00 amPHL - GEG
1 stop7h 52mDelta
mar. 1/612:55 pmGEG - PHL
1 stop8h 26mDelta
Deal found 12/3$448
This Delta deal was found by Cheapflights users on 12/3. 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.
mié. 12/316:00 amPHL - GEG
1 stop7h 52mDelta
mié. 1/77:20 amGEG - PHL
2 stops13h 36mDelta
Deal found 12/3$453
This Delta deal was found by Cheapflights users on 12/3. 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.
mié. 12/3110:31 amPHL - BOI
2 stops14h 26mDelta
mié. 1/77:25 amBOI - PHL
2 stops14h 31mDelta
Deal found 12/3$458
This Delta deal was found by Cheapflights users on 12/3. 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.
mié. 12/176:30 pmPHL - BOI
1 stop7h 39mDelta
dom. 12/216:19 pmBOI - PHL
1 stop9h 31mDelta
Deal found 12/3$462

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 diciembre 5, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$193
(American Airlines)

One-way from

$99
(Delta)

Popular in

December

Cheapest in

September

Average price

$631
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. 14% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 diciembre 5, 2025.
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

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mar. 2/17

6:00 am-1:08 pm

1 stop10h 08m

Spokane

mar. 2/24

2:05 pm-11:44 pm

1 stop6h 39m

$197

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

mié. 2/4

10:43 am-7:25 pm

1 stop10h 42m

Boise Air Term. Gowen Fld

mar. 2/10

12:37 pm-11:55 pm

2 stops9h 18m

$198

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mié. 1/21

5:40 am-1:25 pm

2 stops10h 45m

Spokane

mar. 1/27

7:05 am-10:00 pm

2 stops11h 55m

$207

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mar. 1/13

12:41 pm-11:21 pm

2 stops13h 40m

Spokane

sáb. 1/17

2:00 pm-11:26 pm

1 stop6h 26m

$229

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

mié. 2/25

5:31 am-12:28 pm

1 stop8h 57m

Boise Air Term. Gowen Fld

lun. 3/2

7:15 pm-11:43 am

2 stops14h 28m

$229

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

mié. 1/21

6:00 am-12:37 pm

2 stops9h 37m

Spokane

lun. 1/26

4:55 pm-9:50 am

2 stops13h 55m

$234

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

jue. 1/29

6:00 am-1:03 pm

2 stops10h 03m

Spokane

mar. 2/3

7:30 pm-9:23 am

2 stops10h 53m

$234

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

sáb. 1/24

7:06 pm-12:23 am

1 stop8h 17m

Spokane

sáb. 1/31

7:30 am-6:03 pm

1 stop7h 33m

$250

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

jue. 2/26

6:00 am-1:58 pm

1 stop9h 58m

Boise Air Term. Gowen Fld

mar. 3/3

2:54 pm-11:44 pm

1 stop6h 50m

$251

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

mar. 3/3

6:00 am-1:58 pm

1 stop9h 58m

Boise Air Term. Gowen Fld

jue. 3/5

2:54 pm-11:44 pm

1 stop6h 50m

$251

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/5

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 January is currently the most expensive (average of $317). 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.

What is the cheapest time of day to fly from PHL to ID?

Find hourly flight availability from Philadelphia to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 5, 2025.

A simple way to save on the total cost of your ticket is to fly from Philadelphia to Idaho at noon. If you’re flexible enough to do this you can expect to save up to 28% on your trip compared to booking a flight in the afternoon.

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 diciembre 5, 2025.
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
4,250 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
4,250 reviews
Southwest
8.0
Very good
4,250 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
8,011 reviews
Southwest
8.0
Very good
4,250 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
9,066 reviews
Southwest
8.0
Very good
4,250 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
11,047 reviews
Southwest
8.0
Very good
4,250 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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 10h 08m. There are 2147 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?

    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 January is currently the most expensive (average of $317). 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 diciembre 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$270Average$561FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$301Average$497FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$358Average$454FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$367Average$629FlexibilityNo cancel feeOn-time69%

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