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Idaho

$127+ 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 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BOI
Mar 30 — Apr 61
Mon 3/30
Mon 4/6
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 28, 2026.

This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:10 am
PHL
-
GEG
1 stop8h 03m
Delta
Wed 5/206:45 pm
GEG
-
PHL
1 stop8h 25m
Delta
Deal found 2/25$223
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:25 am
PHL
-
GEG
2 stops14h 18m
Delta
Tue 5/197:23 pm
GEG
-
PHL
1 stop7h 14m
Delta
Deal found 2/25$228
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:54 pm
PHL
-
BOI
1 stop7h 03m
Delta
Tue 4/212:18 pm
BOI
-
PHL
1 stop8h 41m
Delta
Deal found 2/25$237
This Kiwi.com deal was found by Cheapflights users on 2/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:25 pm
PHL
-
BOI
2 stops23h 10m
Multiple Airlines
Thu 4/1611:53 am
BOI
-
PHL
1 stop15h 41m
Multiple Airlines
Deal found 2/26$250
This Kiwi.com deal was found by Cheapflights users on 2/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:41 pm
PHL
-
BOI
1 stop16h 27m
Frontier
Sun 4/1911:53 am
BOI
-
PHL
1 stop15h 41m
Frontier
Deal found 2/26$259
This Kiwi.com deal was found by Cheapflights users on 2/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:25 pm
PHL
-
GEG
1 stop16h 56m
Frontier
Thu 4/93:40 pm
GEG
-
PHL
2 stops10h 51m
Frontier
Deal found 2/25$270
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:01 pm
PHL
-
GEG
1 stop7h 05m
Delta
Tue 5/195:37 pm
GEG
-
PHL
1 stop9h 00m
Delta
Deal found 2/25$281
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:45 pm
PHL
-
GEG
1 stop7h 50m
Delta
Thu 5/211:11 pm
GEG
-
PHL
1 stop13h 26m
Delta
Deal found 2/25$284
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:01 pm
PHL
-
GEG
1 stop7h 05m
Delta
Wed 5/205:37 pm
GEG
-
PHL
2 stops9h 33m
Delta
Deal found 2/25$286
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:25 am
PHL
-
GEG
2 stops14h 18m
Delta
Mon 5/187:23 pm
GEG
-
PHL
2 stops12h 39m
Delta
Deal found 2/25$291
This Delta deal was found by Cheapflights users on 2/24. 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 3/245:40 am
PHL
-
GEG
1 stop8h 57m
Delta
Tue 3/3110:40 pm
GEG
-
PHL
1 stop7h 42m
Delta
Deal found 2/24$297
This American Airlines deal was found by Cheapflights users on 2/27. 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 3/267:14 am
PHL
-
JAC
1 stop7h 04m
American Airlines
Thu 4/21:44 pm
JAC
-
PHL
1 stop6h 10m
American Airlines
Deal found 2/27$297

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 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$223
(Delta)

One-way from

$127
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$516
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. 5% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% 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 28, 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

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 5/14

7:01 pm-11:06 pm

1 stop7h 05m

Spokane

Tue 5/19

7:23 pm-5:37 am

1 stop7h 14m

$281

PhiladelphiaIdaho Falls

PHL - IDA

PHLIDA

Philadelphia

Sun 4/5

7:00 am-12:27 pm

1 stop7h 27m

Idaho Falls Fanning Field

Mon 4/13

6:58 pm-5:59 am

1 stop9h 01m

$309

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 4/30

6:54 pm-11:34 pm

1 stop7h 40m

Spokane

Wed 5/13

5:37 pm-5:37 am

1 stop9h 00m

$318

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 3/11

3:36 pm-10:25 pm

1 stop8h 49m

Boise Air Term. Gowen Fld

Wed 4/1

11:40 pm-9:22 am

1 stop7h 42m

$321

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 5/5

5:30 am-2:26 pm

2 stops10h 56m

Boise Air Term. Gowen Fld

Tue 5/12

6:00 pm-5:37 am

1 stop9h 37m

$326

PhiladelphiaIdaho Falls

PHL - IDA

PHLIDA

Philadelphia

Wed 3/18

7:00 am-12:27 pm

1 stop7h 27m

Idaho Falls Fanning Field

Mon 3/23

6:55 pm-5:41 am

1 stop8h 46m

$364

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 4/23

5:30 am-1:07 pm

1 stop9h 37m

Boise Air Term. Gowen Fld

Mon 4/27

8:40 pm-8:55 am

2 stops10h 15m

$364

PhiladelphiaHailey

PHL - SUN

PHLSUN

Philadelphia

Sat 6/13

12:46 pm-6:57 pm

1 stop8h 11m

Hailey Sun Valley-Friedman

Wed 6/17

1:57 pm-5:31 am

2 stops13h 34m

$376

PhiladelphiaSpokane

PHL - GEG

PHLGEG

Philadelphia

Thu 5/14

7:01 pm-11:06 pm

1 stop7h 05m

Spokane

Sun 5/24

2:16 pm-11:12 pm

1 stop5h 56m

$378

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 4/23

7:55 am-5:00 pm

2 stops11h 05m

Boise Air Term. Gowen Fld

Mon 4/27

12:05 pm-11:05 pm

2 stops9h 00m

$389

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/25

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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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, 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 28, 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
4,303 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
Southwest
8.0
Very good
4,303 reviews
Southwest
8.0
Very good
4,303 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
Delta
7.9
Good
8,245 reviews
Southwest
8.0
Very good
4,303 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
United Airlines
7.4
Good
9,363 reviews
Southwest
8.0
Very good
4,303 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
American Airlines
7.2
Good
11,367 reviews
Southwest
8.0
Very good
4,303 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.

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 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 ($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 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$199Average$540FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$283Average$487FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$350Average$636FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$358Average$488FlexibilityNo cancel feeOn-time63%

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