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$177+ Cheap flights from Idaho Falls to Philadelphia (IDA - 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — PHL
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Idaho Falls to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to Philadelphia (PHL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 16, 2025.

Round-trip from

$426
(Delta)

One-way from

$177
(Kiwi.com)

Popular in

December

Cheapest in

April
From Idaho Falls Fanning Field to Philadelphia
Search Deals
One-way flight from Idaho Falls Fanning Field to Philadelphia
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Highest demand for flights based on searches. 23% potential increase in price ($201 potential increase over avg. RT price).
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Cheapest flight prices on average. 10% potential price decrease ($61 potential savings vs. average RT price).
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Find flight deals from Idaho Falls to Philadelphia

Cheapest flights from Idaho Falls to Philadelphia
Explore the most affordable flight options available from Idaho Falls to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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 10/196:53 pmIDA - PHL
1 stop8h 57mDelta
Mon 10/277:05 amPHL - IDA
1 stop7h 28mDelta
Deal found 9/15$426
This Delta deal was found by Cheapflights users on 9/14. 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 12/157:06 pmIDA - PHL
2 stops12h 20mDelta
Wed 12/317:00 amPHL - IDA
1 stop7h 27mDelta
Deal found 9/14$431
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 10/72:35 pmIDA - PHL
1 stop6h 34mUnited Airlines
Tue 10/1410:05 amPHL - IDA
2 stops12h 47mUnited Airlines
Deal found 9/15$438
This Delta deal was found by Cheapflights users on 9/14. 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 12/241:10 pmIDA - PHL
2 stops8h 06mDelta
Wed 12/317:00 amPHL - IDA
1 stop7h 27mDelta
Deal found 9/14$446
This Delta deal was found by Cheapflights users on 9/14. 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 12/226:57 pmIDA - PHL
2 stops12h 29mDelta
Wed 12/317:00 amPHL - IDA
1 stop7h 27mDelta
Deal found 9/14$468
This Delta deal was found by Cheapflights users on 9/14. 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.
Sat 12/206:57 pmIDA - PHL
1 stop8h 39mDelta
Wed 12/317:00 amPHL - IDA
1 stop7h 27mDelta
Deal found 9/14$471
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/11:35 pmIDA - PHL
1 stop9h 35mAmerican Airlines
Sun 10/57:20 amPHL - IDA
1 stop6h 49mAmerican Airlines
Deal found 9/15$481
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 11/123:50 pmIDA - PHL
1 stop11h 52mAlaska Airlines
Mon 11/177:12 pmPHL - IDA
1 stop22h 01mAlaska Airlines
Deal found 9/15$503
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 11/128:30 amIDA - PHL
2 stops12h 33mUnited Airlines
Mon 11/178:08 amPHL - IDA
1 stop9h 08mUnited Airlines
Deal found 9/15$514
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 10/86:00 amIDA - PHL
1 stop10h 11mAlaska Airlines
Sat 10/117:00 amPHL - IDA
1 stop10h 38mAlaska Airlines
Deal found 9/14$529

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls 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 September 16, 2025.
Use the filters below to find and compare flights from Idaho Falls to Philadelphia that are best for you.

Fly from

Idaho Falls

Fly to

Philadelphia

Route

Depart

Return

Price

Idaho FallsPhiladelphia

IDA - PHL

IDAPHL

Idaho Falls Fanning Field

Sun 10/19

6:53 pm-5:50 am

1 stop8h 57m

Philadelphia

Mon 10/27

7:05 am-12:33 pm

1 stop7h 28m

$426

Idaho FallsPhiladelphia

IDA - PHL

IDAPHL

Idaho Falls Fanning Field

Mon 12/15

7:06 pm-9:26 am

2 stops12h 20m

Philadelphia

Wed 12/31

7:00 am-12:27 pm

1 stop7h 27m

$431

Idaho FallsPhiladelphia

IDA - PHL

IDAPHL

Idaho Falls Fanning Field

Tue 10/7

2:35 pm-11:09 pm

1 stop6h 34m

Philadelphia

Tue 10/14

10:05 am-8:52 pm

2 stops12h 47m

$438

Idaho FallsPhiladelphia

IDA - PHL

IDAPHL

Idaho Falls Fanning Field

Wed 12/24

1:10 pm-11:19 pm

1 stop8h 09m

Philadelphia

Wed 12/31

7:00 am-12:27 pm

1 stop7h 27m

$441

Idaho FallsPhiladelphia

IDA - PHL

IDAPHL

Idaho Falls Fanning Field

Mon 12/22

6:57 pm-5:36 am

1 stop8h 39m

Philadelphia

Wed 12/31

7:00 am-12:27 pm

1 stop7h 27m

$441

Idaho FallsPhiladelphia

IDA - PHL

IDAPHL

Idaho Falls Fanning Field

Wed 11/12

3:50 pm-5:42 am

1 stop11h 52m

Philadelphia

Mon 11/17

7:12 pm-3:13 pm

1 stop22h 01m

$503

Idaho FallsPhiladelphia

IDA - PHL

IDAPHL

Idaho Falls Fanning Field

Wed 11/12

8:30 am-11:03 pm

2 stops12h 33m

Philadelphia

Mon 11/17

8:08 am-3:16 pm

1 stop9h 08m

$514

Idaho FallsPhiladelphia

IDA - PHL

IDAPHL

Idaho Falls Fanning Field

Mon 9/29

9:39 pm-2:18 pm

2 stops38h 39m

$177

Idaho FallsPhiladelphia

IDA - PHL

IDAPHL

Idaho Falls Fanning Field

Fri 10/3

10:57 pm-9:15 am

3 stops32h 18m

$225

Idaho FallsPhiladelphia

IDA - PHL

IDAPHL

Idaho Falls Fanning Field

Thu 10/2

10:13 pm-12:46 am

3 stops24h 33m

$228

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 16 results
1
2

Best time to book a flight from Idaho Falls to Philadelphia

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

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

Currently, August is the cheapest month in which you can book a flight from Idaho Falls to Philadelphia (average of $236). Flying from Idaho Falls to Philadelphia in March is currently the most expensive (average of $295). 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 IDA to PHL?

Find hourly flight availability from Idaho Falls to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

A simple way to save on the total cost of your ticket is to fly from Idaho Falls to Philadelphia at noon. If you’re flexible enough to do this you can expect to save up to 41% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated September 16, 2025.
Read reviews from past customers who have flown United Airlines and American Airlines from Idaho Falls to Philadelphia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,924 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,924 reviews
United Airlines
7.4
Good
8,924 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,924 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Idaho Falls to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Idaho Falls to Philadelphia?

    Airlines like Delta and United Airlines fly from Idaho Falls to Philadelphia in about 6h 34m. The time it takes to get you to your destination can typically vary by up to 2h 23m. Airlines will cover a distance of 1899 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Idaho Falls to Philadelphia round-trip?

    Currently priced at $454, American Airlines will fly you from Idaho Falls to Philadelphia and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $502. These flights start at 29% lower than the current average price 3 months from now.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Idaho Falls to Philadelphia (average of $236). Flying from Idaho Falls to Philadelphia in March is currently the most expensive (average of $295). 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
Vineland
Wildwood
King of Prussia
Pottstown
Reading
Dewey Beach
Ephrata
Camden
Ocean City
Cherry Hill
Dover
Elkton
Essington
Willow Grove
Newark
Millville
Chester
Exton
Havre de Grace
Plymouth Meeting

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Alternative routes for Idaho Falls to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Idaho Falls to Philadelphia

Discover the top 2 airlines that operate flights from Idaho Falls 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$454Average$595FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$502Average$790FlexibilityNo cancel feeOn-time69%

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