$175 Cheap Flights from Philadelphia (PHL) to Idaho Falls (IDA)

View $175 flight on Sat, Jun 6, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $175 for one-way flights and $349 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sun, Sep 6 - Thu, Sep 10
PHL
Philadelphia
IDA
Idaho Falls
$349 Roundtrip, found 5 hours ago
$349
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Sun, Sep 6 from Philadelphia to Idaho Falls, returning Thu, Sep 10, priced at $349 found 5 hours ago
Bargain Flight
Sat, May 30 - Sat, Jun 6
PHL
Philadelphia
IDA
Idaho Falls
$355 Roundtrip, found 1 day ago
$355
Roundtrip
found 1 day ago
Select Bargain Flight flight, departing Sat, May 30 from Philadelphia to Idaho Falls, returning Sat, Jun 6, priced at $355 found 1 day ago
Alaska Airlines
Thu, May 28 - Fri, Jun 5
PHL
Philadelphia
IDA
Idaho Falls
$374 Roundtrip, just found
$374
Roundtrip
just found
Select Alaska Airlines flight, departing Thu, May 28 from Philadelphia to Idaho Falls, returning Fri, Jun 5, priced at $374 just found
Alaska Airlines
Fri, Aug 14 - Sun, Aug 23
PHL
Philadelphia
IDA
Idaho Falls
$399 Roundtrip, found 2 hours ago
$399
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Fri, Aug 14 from Philadelphia to Idaho Falls, returning Sun, Aug 23, priced at $399 found 2 hours ago
United
Sat, May 30 - Sat, Jun 6
PHL
Philadelphia
IDA
Idaho Falls
$408 Roundtrip, found 1 day ago
$408
Roundtrip
found 1 day ago
Select United flight, departing Sat, May 30 from Philadelphia to Idaho Falls, returning Sat, Jun 6, priced at $408 found 1 day ago
Delta
Wed, Jul 29 - Mon, Aug 3
PHL
Philadelphia
IDA
Idaho Falls
$409 Roundtrip, found 2 days ago
$409
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Jul 29 from Philadelphia to Idaho Falls, returning Mon, Aug 3, priced at $409 found 2 days ago
Alaska Airlines
Sun, Sep 6 - Thu, Sep 10
PHL
Philadelphia
IDA
Idaho Falls
$410 Roundtrip, found 5 hours ago
$410
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Sun, Sep 6 from Philadelphia to Idaho Falls, returning Thu, Sep 10, priced at $410 found 5 hours ago
Bargain Flight
Tue, May 19 - Wed, May 27
PHL
Philadelphia
IDA
Idaho Falls
$413 Roundtrip, found 1 day ago
$413
Roundtrip
found 1 day ago
Select Bargain Flight flight, departing Tue, May 19 from Philadelphia to Idaho Falls, returning Wed, May 27, priced at $413 found 1 day ago
American Airlines
Wed, Sep 16 - Wed, Sep 30
PHL
Philadelphia
IDA
Idaho Falls
$415 Roundtrip, found 5 days ago
$415
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Sep 16 from Philadelphia to Idaho Falls, returning Wed, Sep 30, priced at $415 found 5 days ago
Alaska Airlines
Thu, May 28 - Sat, Jun 6
PHL
Philadelphia
IDA
Idaho Falls
$424 Roundtrip, found 15 hours ago
$424
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Thu, May 28 from Philadelphia to Idaho Falls, returning Sat, Jun 6, priced at $424 found 15 hours ago

Alternative airports near Idaho Falls

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

Select flight to Idaho Falls Regional IDA. Cheapest and Closest option available. Average driving time to city center is 5 minutes. Flights from $399
IDA
Idaho Falls Regional
CheapestClosest
Average driving time to city center5 min
Flights from $399

Frequently asked questions

How much does a flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) cost?
You can find cheap one-way flights from $175 and cheap return flights from $349 Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) with Expedia. One-way flights typically cost between $335 and $1083, and return flights often range between $518 and $2228. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
January is the cheapest month to fly from Philadelphia (PHL) to Idaho Falls (IDA), with average round-trip fares around $418. This is about 38% lower than the average price throughout the year, as travel demand is usually lower after the holiday season. Other budget-friendly months to consider are June and October.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
Enter PHL to IDA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
American Airlines is one of the cheapest airlines offering connecting flights from Philadelphia (PHL) to Idaho Falls (IDA), with round-trip tickets starting from around $398 with a layover in Charlotte-Douglas Intl. (CLT). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
To find a cheap flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
The best time to fly from Philadelphia (PHL) to Idaho Falls (IDA) is typically in January or October. During these months, you can find return flights at around $418, making them the cheapest options. January is ideal as it follows the holiday rush, while October offers pleasant fall weather, allowing for a great travel experience.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
The earliest flight from Philadelphia International Airport (PHL) to Idaho Falls Regional Airport (IDA) usually departs at 5:00 AM, also operated by American Airlines. This flight is part of a seasonal service active in January and February, giving you a great opportunity to maximize your time in Idaho. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
The most popular departure times for flights from Philadelphia, PA (PHL) to Idaho Falls, ID (IDA) are in the early morning, from 6am to 9am. About 40% of passengers prefer this time window. Many major carriers, including United Airlines, Delta Air Lines and American Airlines, offer flights during this window. This timing works well because it allows you to start your day early and maximize your time in Idaho Falls.
How long does it take to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
Flying from PHL to IDA with a connection usually takes about 7 hours 30 minutes, traveling roughly 1,901 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
You can fly first class between PHL and IDA. First class cabins are available on:

  • American Airlines
  • Delta Air Lines
  • United Airlines

How do I earn miles on a Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) flight with Expedia?
It's easy to earn miles on a Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Idaho Falls from Philadelphia Intl. (PHL)?
If you're planning to travel to Idaho Falls from Philadelphia Intl. (PHL), you can fly into Idaho Falls Regional (IDA) Some flights may connect through major hubs like O'Hare Intl. (ORD), Washington Dulles Intl. (IAD), Hartsfield-Jackson Atlanta Intl. (ATL) before reaching Idaho Falls. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) at the last minute?
Typically, booking a last minute flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) flight and hotel package?
Securing a Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) Idaho Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
If you booked your Philadelphia, PA (PHL-Philadelphia Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Philadelphia Intl.
Destination airport
Idaho Falls Regional
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$348
Distance
1900 mi

Book with confidence

Philadelphia to Idaho Falls Flights

The cheapest times to fly from Philadelphia to Idaho Falls

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 Philadelphia to Idaho Falls are during the month of September. You can find some of the cheapest flights from Philadelphia to Idaho Falls with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Philadelphia to Idaho Falls: 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 Philadelphia to Idaho Falls

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 Philadelphia to Idaho Falls in 2026. You can also book with separate airlines for your outbound and return journeys, from $175 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 Philadelphia to Idaho Falls 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 Philadelphia to Idaho Falls 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.

 

Philadelphia to Idaho Falls Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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