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Philadelphia

$127+ Cheap flights from Idaho to Philadelphia (PHL)

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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — PHL
mar. 5 — mar. 121
jue. 3/5
jue. 3/12
1 adult, Economy
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Cheap flight deals from Idaho to Philadelphia

Cheapest flights from Idaho to Philadelphia
Explore the most affordable flight options available from Idaho to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on febrero 3, 2026.

This Alaska Airlines deal was found by Cheapflights users on 2/1. 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.
mié. 4/18:28 pm
BOI
-
PHL
1 stop7h 37m
Alaska Airlines
mié. 4/87:25 am
PHL
-
BOI
1 stop10h 04m
Alaska Airlines
Deal found 2/1$257
This Delta deal was found by Cheapflights users on 2/2. 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.
mar. 3/312:15 pm
GEG
-
PHL
1 stop6h 44m
Delta
mar. 4/76:49 pm
PHL
-
GEG
1 stop7h 59m
Delta
Deal found 2/2$257
This United Airlines deal was found by Cheapflights users on 2/1. 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. 4/12:37 pm
BOI
-
PHL
1 stop7h 06m
United Airlines
mié. 4/811:36 am
PHL
-
BOI
2 stops11h 46m
United Airlines
Deal found 2/1$262
This United Airlines deal was found by Cheapflights users on 2/2. 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. 10/272:35 pm
IDA
-
PHL
1 stop6h 11m
United Airlines
sáb. 10/318:00 am
PHL
-
IDA
1 stop7h 35m
United Airlines
Deal found 2/2$309
This Delta deal was found by Cheapflights users on 2/3. 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.
vie. 2/275:45 am
GEG
-
PHL
1 stop8h 53m
Delta
mié. 3/46:10 am
PHL
-
GEG
1 stop9h 58m
Delta
Deal found 2/3$325
This Expedia deal was found by Cheapflights users on 2/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/216:04 pm
BOI
-
PHL
1 stop10h 01m
Alaska Airlines
vie. 4/246:58 pm
PHL
-
BOI
1 stop16h 44m
Alaska Airlines
Deal found 2/3$337
This United Airlines deal was found by Cheapflights users on 2/2. 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.
lun. 3/27:00 am
GEG
-
PHL
1 stop11h 33m
United Airlines
lun. 3/93:30 pm
PHL
-
GEG
1 stop8h 48m
United Airlines
Deal found 2/2$337
This American Airlines deal was found by Cheapflights users on 2/3. 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.
mar. 4/211:29 pm
BOI
-
PHL
1 stop8h 30m
American Airlines
vie. 4/247:15 am
PHL
-
BOI
1 stop7h 34m
American Airlines
Deal found 2/3$347
This Delta deal was found by Cheapflights users on 2/2. 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.
lun. 3/27:27 am
GEG
-
PHL
2 stops13h 19m
Delta
lun. 3/96:05 am
PHL
-
GEG
2 stops10h 05m
Delta
Deal found 2/2$347
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/276:15 am
IDA
-
PHL
1 stop9h 37m
Alaska Airlines
sáb. 10/316:45 am
PHL
-
IDA
1 stop10h 44m
Alaska Airlines
Deal found 2/3$349
This Delta deal was found by Cheapflights users on 2/3. 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.
mar. 4/216:16 pm
BOI
-
PHL
1 stop9h 19m
Delta
vie. 4/242:59 pm
PHL
-
BOI
2 stops10h 58m
Delta
Deal found 2/3$352
This Delta deal was found by Cheapflights users on 2/2. 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. 3/47:30 pm
GEG
-
PHL
2 stops10h 20m
Delta
dom. 3/86:49 pm
PHL
-
GEG
1 stop8h 01m
Delta
Deal found 2/2$352

Find flight deals from Idaho to Philadelphia

Keep the following information in mind while searching for Idaho to Philadelphia flight deals. Data was last updated febrero 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$257
(Alaska Airlines)

One-way from

$127
(Booking.com)

Popular in

December

Cheapest in

January

Average price

$416
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Philadelphia flights.
Search Deals
From Idaho to Philadelphia
Search Deals
One-way flight from Idaho to Philadelphia
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 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 Idaho to Philadelphia 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 febrero 3, 2026.
Use the filters below to find and compare flights from Idaho to Philadelphia that are best for you.

Fly from

Idaho

Fly to

Philadelphia

Route

Depart

Return

Price

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

mié. 4/1

8:28 pm-6:05 am

1 stop7h 37m

Philadelphia

mié. 4/8

7:25 am-3:29 pm

1 stop10h 04m

$257

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

mar. 3/31

2:15 pm-11:59 pm

1 stop6h 44m

Philadelphia

mar. 4/7

6:49 pm-11:48 pm

1 stop7h 59m

$257

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

mar. 4/14

1:19 pm-11:59 pm

1 stop7h 40m

Philadelphia

mar. 4/21

7:15 am-12:29 pm

1 stop8h 14m

$257

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

mié. 4/1

2:37 pm-11:43 pm

1 stop7h 06m

Philadelphia

mié. 4/8

11:36 am-9:22 pm

2 stops11h 46m

$262

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

mar. 4/14

6:00 am-7:18 pm

2 stops10h 18m

Philadelphia

mar. 4/21

6:54 pm-11:34 pm

1 stop7h 40m

$262

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

vie. 2/27

5:45 am-5:38 pm

1 stop8h 53m

Philadelphia

mié. 3/4

6:10 am-1:08 pm

1 stop9h 58m

$325

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

lun. 3/2

12:25 pm-11:53 pm

1 stop8h 28m

Philadelphia

lun. 3/9

5:15 pm-11:14 pm

1 stop8h 59m

$337

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

lun. 3/2

7:00 am-9:33 pm

1 stop11h 33m

Philadelphia

lun. 3/9

12:15 pm-9:18 pm

2 stops12h 03m

$342

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

mar. 4/21

1:29 pm-11:59 pm

1 stop8h 30m

Philadelphia

vie. 4/24

7:15 am-12:49 pm

1 stop7h 34m

$347

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

lun. 3/2

7:27 am-11:46 pm

2 stops13h 19m

Philadelphia

lun. 3/9

9:41 am-9:37 pm

2 stops14h 56m

$347

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

Showing 1-10 of 52 results
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Best time to book a flight from Idaho to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Idaho 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 Idaho to Philadelphia

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

Currently, December is the cheapest month in which you can book a flight from Idaho to Philadelphia (average of $102). Flying from Idaho to Philadelphia in January is currently the most expensive (average of $292). 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.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Philadelphia. 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 into for flights to Philadelphia from Idaho?

    If you book a flight to Philadelphia from Idaho, you will be flying to Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia.

  • How long is the flight from Idaho to Philadelphia?

    For as low as $257, Alaska Airlines can have you in Philadelphia from Idaho in 6h 44m. The distance between Idaho and Philadelphia is about 2147 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Idaho to Philadelphia one-way?

    $96 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $96 and $153, respectively.

  • What are the most popular routes from Idaho to Philadelphia?

    The most popular route from Idaho to Philadelphia is Spokane - Philadelphia. You may also consider Boise Air Term. Gowen Fld - Philadelphia or Idaho Falls Fanning Field - Philadelphia.

  • Can I find deals for flights from Idaho to Philadelphia that include hotel bookings?

    Yes. In addition to deals on Idaho to Philadelphia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho to Philadelphia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Philadelphia.

  • Can I find deals for business class flights from Idaho to Philadelphia?

    Yes. Cheapflights offers flight deals from Idaho to Philadelphia 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 Idaho to Philadelphia?

    Currently, December is the cheapest month in which you can book a flight from Idaho to Philadelphia (average of $102). Flying from Idaho to Philadelphia in January is currently the most expensive (average of $292). 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

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
Pottstown
Reading
Ocean City
King of Prussia
Cherry Hill
Lewes
Dewey Beach
Ephrata
Camden
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Newark

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Alternative routes for Idaho to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Idaho to Philadelphia

Discover the top 5 airlines that operate flights from Idaho to Philadelphia. 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 febrero 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$248FlexibilityNo cancel feeOn-time62%
DeltaCheapest$195Average$457FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$257Average$665FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$306Average$533FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$407Average$486FlexibilityNo cancel feeOn-time63%

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