Cheap Flights from Philadelphia (PHLA) to Idaho Falls (IDA)

Compare Philadelphia to Idaho Falls flight deals

Find the cheapest month or even day of the year to fly to Idaho Falls

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Flight deals from Philadelphia to Idaho Falls

Looking for a cheap last-minute deal or the best return flight from Philadelphia to Idaho Falls Airport? If you want to travel next month, return fares start from £329. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Philadelphia to Idaho Falls

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia to Idaho Falls flights are currently cheapest in August.

Philadelphia to Idaho Falls: Alternative routes

Compare routes from Philadelphia to Idaho Falls below. You may find an airport to fly into that's cheaper, faster, or easier than Idaho Falls.

Philadelphia to Idaho Falls: Flight information

The things to know before you go.
Cheapest flight found£80
Cheapest month to flyAugust

Finding cheap flights from Philadelphia to Idaho Falls: Frequently asked questions

The best price we found for a return flight from Philadelphia to Idaho Falls is £292. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Philadelphia to Idaho Falls. But we found flights with one stop from £292.
As of June 2026, there are no flights flying from Philadelphia to Idaho Falls.
The cheapest month to fly from Philadelphia to Idaho Falls is usually September.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Philadelphia to Idaho Falls Airport on Saturday, 5 September 2026.
No airlines currently offer direct flights between Philadelphia and Idaho Falls Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Idaho Falls but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Idaho Falls is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Idaho Falls is United .

Travelling from Philadelphia to Idaho Falls Regional Airport (IDA): What you need to know

  • The timezone in Idaho Falls is UTC-7, which is two hours behind Philadelphia. Idaho Falls Regional Airport is located in Idaho Falls.

  • Arrive at the airport on time so you don't miss your flight from Philadelphia to IDA. Be there at least two hours ahead for international flights and an hour early for domestic departures to skip the mad dash to your gate.

  • July is a peak travel month. If you're heading away then or during a major holiday like Thanksgiving, Memorial Day or Christmas, show up even earlier. Aim for at least two hours ahead for domestic flights and as much as four hours for international journeys.

Airports in Philadelphia

Philadelphia International Airport (PHL)

Trenton-Mercer Airport (TTN)

  • Using public transport, you can travel from central Philadelphia to TTN in around 1 hour 35 minutes. The airport is roughly 48 kms (30 miles) away, and getting there by car takes approximately 40 minutes.

  • Taking off bright and early? Think about checking in to one of these hotels near Trenton-Mercer Airport the day before your Philadelphia to IDA flight:

  • Trenton-Mercer Airport has an on-time performance of 76%. This figure sheds light on how often flights that depart from this airport arrive on schedule.

  • The street address for TTN is Scotch Road, Terminal Building.

About Idaho Falls Regional Airport (IDA)

Getting from Idaho Falls Regional Airport (IDA) to central Idaho Falls

  • From Idaho Falls Regional Airport, central Idaho Falls is around 8 kms (5 miles) away. It takes about 10 minutes to reach the city centre by car.

  • It'll take around 30 minutes if you're using public transport.

How to find the cheapest flights from Philadelphia to Idaho Falls Regional Airport (IDA)

  • At the moment, £80 is the lowest price we've found for a one-way ticket from Philadelphia to Idaho Falls Regional Airport. The cheapest price for a return flight is £292. Keep in mind fares can change due to availability at the time of booking.

  • To pick up cheap flights from Philadelphia to IDA, book ahead. Airlines tend to offer lower prices when flights are first released.

  • Affordable Philadelphia to Idaho Falls Regional Airport tickets are easier to find when your dates are flexible. Try using the 'Whole month' search function to compare fares throughout the month and then fly out on the cheapest day.

  • Locking in a cheap plane ticket from Philadelphia to IDA couldn't be easier with Price Alerts. All you need to do is set up one of these automatic alerts and we'll notify you when the price has dropped.

  • Lock in a cheap flight from Philadelphia to Idaho Falls Regional Airport by using filters. Select your ideal times, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

The best time to fly from Philadelphia to Idaho Falls Regional Airport (IDA)

  • December is the quietest month for flights from Philadelphia to Idaho Falls Regional Airport (IDA), while July is the busiest. Find the ideal time to visit Idaho Falls based on whether you want a laid-back vibe or a lively atmosphere.

  • When booking your Philadelphia to IDA plane ticket, consider the kind of weather forecast you're hoping for. July is the warmest month in Idaho Falls, with temperatures ranging from 9ºC to 35ºC.

  • Search for cheap tickets from Philadelphia to Idaho Falls Regional Airport in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between -15ºC and 1ºC.

More about Idaho Falls

  • After booking your flight from Philadelphia to Idaho Falls Regional Airport, find a hotel that puts you in a great location. Make one of these options your base for exploring Idaho Falls:

  • Snake River Greenbelt and Idaho Falls River Walk are a couple of top-rated attractions to put on your Idaho Falls travel itinerary. Keep the momentum going by heading to East Idaho Aquarium.

Explore more of the United States

  • Idaho Falls has plenty to offer, but there are so many other corners of the United States you'll want to see. About 257 kms (160 miles) south of Idaho Falls, a visit to Ogden will keep you on the go. Don't miss top attractions like Snowbasin Resort, Dinosaur Park and Museum and Ogden Botanical Gardens.

  • Next? Find your way to Layton. It's roughly 274 kms (170 miles) south of Idaho Falls and boasts highlights including SeaQuest Utah and Layton Utah Temple.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.