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Philadelphia

$111+ 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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — PHL
Apr 27 — May 41
Mon 4/27
Mon 5/4
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 March 28, 2026.

This Southwest deal was found by Cheapflights users on 3/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/143:15 pm
BOI
-
PHL
1 stop6h 40m
Southwest
Wed 4/155:50 am
PHL
-
BOI
1 stop7h 05m
Southwest
Deal found 3/24$305
This Delta deal was found by Cheapflights users on 3/24. 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 4/1410:45 am
BOI
-
PHL
2 stops10h 05m
Delta
Wed 4/156:54 pm
PHL
-
BOI
1 stop7h 03m
Delta
Deal found 3/24$310
This American Airlines deal was found by Cheapflights users on 3/23. 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.
Mon 4/131:53 pm
BOI
-
PHL
1 stop8h 18m
American Airlines
Tue 4/145:00 am
PHL
-
BOI
1 stop9h 51m
American Airlines
Deal found 3/23$337
This Delta deal was found by Cheapflights users on 3/23. 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.
Mon 4/132:18 pm
BOI
-
PHL
1 stop8h 41m
Delta
Tue 4/146:00 am
PHL
-
BOI
2 stops12h 14m
Delta
Deal found 3/23$342
This Alaska Airlines deal was found by Cheapflights users on 3/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/26:15 am
IDA
-
PHL
1 stop8h 41m
Alaska Airlines
Sat 12/56:45 am
PHL
-
IDA
1 stop10h 44m
Alaska Airlines
Deal found 3/27$349
This American Airlines deal was found by Cheapflights users on 3/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/23:11 pm
BOI
-
PHL
1 stop7h 20m
American Airlines
Tue 6/95:00 am
PHL
-
BOI
1 stop7h 29m
American Airlines
Deal found 3/24$350
This Alaska Airlines deal was found by Cheapflights users on 3/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:41 pm
GEG
-
PHL
1 stop7h 21m
Alaska Airlines
Sat 5/26:58 pm
PHL
-
GEG
1 stop7h 57m
Alaska Airlines
Deal found 3/27$357
This Delta deal was found by Cheapflights users on 3/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:54 pm
IDA
-
PHL
1 stop9h 16m
Delta
Thu 5/287:25 am
PHL
-
IDA
1 stop9h 09m
Delta
Deal found 3/26$359
This American Airlines deal was found by Cheapflights users on 3/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:26 pm
BOI
-
PHL
1 stop9h 12m
American Airlines
Sat 5/237:05 am
PHL
-
BOI
1 stop10h 02m
American Airlines
Deal found 3/26$363
This American Airlines deal was found by Cheapflights users on 3/27. 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.
Wed 5/131:29 pm
BOI
-
PHL
1 stop8h 30m
American Airlines
Wed 5/275:00 am
PHL
-
BOI
1 stop8h 19m
American Airlines
Deal found 3/27$367
This Delta deal was found by Cheapflights users on 3/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/14:15 pm
GEG
-
PHL
1 stop10h 20m
Delta
Sat 6/67:10 am
PHL
-
GEG
1 stop8h 01m
Delta
Deal found 3/26$367
This Delta deal was found by Cheapflights users on 3/24. 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.
Wed 6/311:39 pm
BOI
-
PHL
1 stop7h 48m
Delta
Fri 6/55:45 am
PHL
-
BOI
1 stop9h 33m
Delta
Deal found 3/24$369

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 March 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$305
(Delta)

One-way from

$111
(Booking.com)

Popular in

December

Cheapest in

January

Average price

$462
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. 7% potential increase in price ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 28, 2026.
Use the filters below to find and compare flights from Idaho to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Mon 4/13

2:18 pm-12:59 am

1 stop8h 41m

Philadelphia

Tue 4/14

6:00 am-4:14 pm

2 stops12h 14m

$342

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Tue 4/28

7:41 pm-6:02 am

1 stop7h 21m

Philadelphia

Sat 5/2

6:58 pm-11:55 pm

1 stop7h 57m

$357

Idaho FallsPhiladelphia

IDA - PHL

IDAPHL

Idaho Falls Fanning Field

Wed 5/20

6:54 pm-6:10 am

1 stop9h 16m

Philadelphia

Thu 5/28

7:25 am-2:34 pm

1 stop9h 09m

$359

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Mon 6/1

5:39 pm-5:35 am

1 stop8h 56m

Philadelphia

Sat 6/6

5:45 am-12:01 pm

2 stops9h 16m

$372

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Tue 6/2

11:39 pm-11:02 am

1 stop9h 23m

Philadelphia

Tue 6/9

5:16 am-1:51 pm

2 stops10h 35m

$374
Quickest round-trip

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Tue 6/2

3:15 pm-11:55 pm

1 stop6h 40m

Philadelphia

Thu 6/4

5:00 am-9:45 am

1 stop6h 45m

$398

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Sat 4/25

6:08 pm-6:02 am

1 stop9h 54m

Philadelphia

Sat 5/2

7:22 am-3:33 pm

1 stop10h 11m

$398

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Mon 5/4

7:41 pm-6:02 am

1 stop7h 21m

Philadelphia

Thu 5/7

7:22 am-2:16 pm

1 stop9h 54m

$398

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Fri 4/24

7:03 pm-5:59 am

1 stop7h 56m

Philadelphia

Mon 4/27

3:42 pm-9:31 pm

1 stop8h 49m

$398

BoisePhiladelphia

BOI - PHL

BOIPHL

Boise Air Term. Gowen Fld

Tue 5/5

6:23 am-4:59 pm

1 stop8h 36m

Philadelphia

Wed 5/6

11:32 am-10:16 pm

2 stops12h 44m

$420

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 60 resultsSorted by cheapest first
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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 March is currently the most expensive (average of $301). 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.

How much does it cost to fly round-trip from Idaho to Philadelphia?

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 $398, Delta can have you in Philadelphia from Idaho in 6h 40m. The distance between Idaho and Philadelphia is about 2106 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 Southwest, with prices starting from $96 and $168, respectively.

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

    The most popular route from Idaho to Philadelphia is Jackson Hole - Philadelphia. You may also consider Boise Air Term. Gowen Fld - Philadelphia or Spokane - 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 March is currently the most expensive (average of $301). 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
Reading
King of Prussia
Camden
Ocean City
Lewes
Dewey Beach
Pottstown
Ephrata
Vineland
Milford
Cherry Hill
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Chester

Browse thousands of different options on Cheapflights for your next trip

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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 4 airlines flying from Idaho to Philadelphia

Discover the top 4 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 March 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$195Average$434FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$257Average$655FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$306Average$532FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$407Average$496FlexibilityNo cancel feeOn-time63%

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