$209 Cheap Flights from Idaho Falls (IDA) to Philadelphia (PHL)

View $209 flight on Thu, Dec 4, 2025Opens in a new window

Popular airlines from Idaho Falls Regional Airport (IDA) to Philadelphia Intl. Airport (PHL)

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Cheap Flights from Idaho Falls to Philadelphia (IDA-PHL)

Prices were available within the past 7 days and start at $209 for one-way flights and $392 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Sat, Dec 6 - Wed, Dec 10
IDA
Idaho Falls
PHL
Philadelphia
$392 Roundtrip, found 9 hours ago
$392
Roundtrip
found 9 hours ago
Select Hawaiian Airlines flight, departing Sat, Dec 6 from Idaho Falls to Philadelphia, returning Wed, Dec 10, priced at $392 found 9 hours ago
Alaska Airlines
Sat, Dec 6 - Fri, Dec 12
IDA
Idaho Falls
PHL
Philadelphia
$402 Roundtrip, found 4 days ago
$402
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, Dec 6 from Idaho Falls to Philadelphia, returning Fri, Dec 12, priced at $402 found 4 days ago
Hawaiian Airlines
Fri, Dec 5 - Sat, Dec 6
IDA
Idaho Falls
PHL
Philadelphia
$405 Roundtrip, found 9 hours ago
$405
Roundtrip
found 9 hours ago
Select Hawaiian Airlines flight, departing Fri, Dec 5 from Idaho Falls to Philadelphia, returning Sat, Dec 6, priced at $405 found 9 hours ago
Hawaiian Airlines
Thu, Dec 25 - Wed, Jan 7
IDA
Idaho Falls
PHL
Philadelphia
$412 Roundtrip, found 4 hours ago
$412
Roundtrip
found 4 hours ago
Select Hawaiian Airlines flight, departing Thu, Dec 25 from Idaho Falls to Philadelphia, returning Wed, Jan 7, priced at $412 found 4 hours ago
Alaska Airlines
Thu, Jan 15 - Sun, Jan 18
IDA
Idaho Falls
PHL
Philadelphia
$418 Roundtrip, found 1 day ago
$418
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Jan 15 from Idaho Falls to Philadelphia, returning Sun, Jan 18, priced at $418 found 1 day ago
United
Thu, Jan 15 - Sun, Jan 18
IDA
Idaho Falls
PHL
Philadelphia
$419 Roundtrip, found 1 day ago
$419
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jan 15 from Idaho Falls to Philadelphia, returning Sun, Jan 18, priced at $419 found 1 day ago
Delta
Thu, Dec 4 - Sun, Dec 14
IDA
Idaho Falls
PHL
Philadelphia
$419 Roundtrip, found 4 hours ago
$419
Roundtrip
found 4 hours ago
Select Delta flight, departing Thu, Dec 4 from Idaho Falls to Philadelphia, returning Sun, Dec 14, priced at $419 found 4 hours ago
American Airlines
Thu, Feb 5 - Sun, Feb 8
IDA
Idaho Falls
PHL
Philadelphia
$419 Roundtrip, found 19 hours ago
$419
Roundtrip
found 19 hours ago
Select American Airlines flight, departing Thu, Feb 5 from Idaho Falls to Philadelphia, returning Sun, Feb 8, priced at $419 found 19 hours ago
Delta
Thu, Feb 5 - Sun, Feb 8
IDA
Idaho Falls
PHL
Philadelphia
$422 Roundtrip, found 19 hours ago
$422
Roundtrip
found 19 hours ago
Select Delta flight, departing Thu, Feb 5 from Idaho Falls to Philadelphia, returning Sun, Feb 8, priced at $422 found 19 hours ago
Delta
Sun, Dec 28 - Tue, Jan 13
IDA
Idaho Falls
PHL
Philadelphia
$424 Roundtrip, found 4 hours ago
$424
Roundtrip
found 4 hours ago
Select Delta flight, departing Sun, Dec 28 from Idaho Falls to Philadelphia, returning Tue, Jan 13, priced at $424 found 4 hours ago

Find the cheapest month to fly from Idaho Falls (IDA) to Philadelphia (PHL)

October is typically the cheapest month to fly

From $388 - $870 per traveler.

Alternative airports near Philadelphia

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Philadelphia Intl. PHL. Cheapest and Closest option available. Average driving time to city center is 17 minutes. Flights from $490
PHL
Philadelphia Intl.
CheapestClosest
Average driving time to city center17 min
Flights from $490

Frequently asked questions

How much does a flight from Idaho Falls Regional Airport (IDA) to Philadelphia Intl. Airport (PHL) cost?
Secure a cheap one-way flight from $209 or cheap return flight from $392 from Idaho Falls Regional Airport (IDA) to Philadelphia Intl. Airport (PHL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Idaho Falls Regional Airport (IDA) to Philadelphia Intl. Airport (PHL)?
Planning your getaway for December can help you save, as it's the cheapest month for flights between IDA and PHL. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Idaho Falls Regional Airport (IDA) to Philadelphia Intl. Airport (PHL)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll fly you from IDA to PHL. Then, sort your results by "Price (lowest to highest)" to score a good deal.
How many flights per day from Idaho Falls Regional Airport (IDA) to Philadelphia Intl. Airport (PHL)?
You'll have to book a flight with a layover if you're traveling from Idaho Falls Regional Airport (IDA) to Philadelphia Intl. Airport (PHL). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from IDA to PHL?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Idaho Falls Regional Airport (IDA) to Philadelphia Intl. Airport (PHL)?
To land at Philadelphia Intl. Airport (PHL) on time, choose a flight that leaves from Idaho Falls Regional Airport (IDA) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Idaho Falls Regional Airport (IDA) to Philadelphia Intl. Airport (PHL) last-minute?
Booking your ticket from IDA to PHL just before your journey is generally more expensive. But if you're flexible with your departure times and dates, you could score a cheap last-minute fare.
Is it cheaper to book an IDA to PHL flight and hotel package?
Securing an IDA to PHL flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Select from our extensive range of stays and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Idaho Falls Regional Airport (IDA) to Philadelphia Intl. Airport (PHL)?
It's generally possible to reschedule or cancel your IDA to PHL flight. However, if it's been more than 24 hours since booking, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Idaho Falls Regional
Destination airport
Philadelphia Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$392
Distance
1900 mi

Book with confidence

Idaho Falls to Philadelphia Flights

The cheapest times to fly from Idaho Falls to Philadelphia

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Idaho Falls to Philadelphia are during the month of December. You can find some of the cheapest flights from Idaho Falls to Philadelphia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Idaho Falls to Philadelphia

Sunday is one of the best days to book for cheap flights from Idaho Falls to Philadelphia: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Idaho Falls to Philadelphia

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Idaho Falls to Philadelphia in 2025. You can also book with separate airlines for your outbound and return journeys, from $209 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Idaho Falls to Philadelphia flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Idaho Falls to Philadelphia airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Idaho Falls to Philadelphia Flights

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*Available to One Key members.