$128 Find Cheap Flights from Philadelphia to Idaho - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Idaho departing on 8/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Idaho, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Idaho, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Philadelphia to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boise1 stop$221
Idaho Falls
Idaho Falls1 stop$379
Hailey
Hailey2 stops$436
Twin Falls
Twin Falls1 stop$974
Pocatello
Pocatello2 stops$971
Spokane
Spokane1 stop$221
Boise
Boise1 stop$221
Idaho Falls
Idaho Falls1 stop$379
Hailey
Hailey2 stops$436
Twin Falls
Twin Falls1 stop$974
Pocatello
Pocatello2 stops$971
Spokane
Spokane1 stop$221

Book Cheap Philadelphia to Idaho Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Idaho that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Idaho

jue., ago. 20 - lun., ago. 24
Delta Logo
7:00 pm - 11:53 pm
PHL
-
GEG
7h 53m
1 stop
Delta Logo
10:56 pm - 11:05 am
GEG
-
PHL
9h 09m
1 stop
$221Delta
sáb., ago. 22 - sáb., ago. 29
American Airlines Logo
9:35 am - 4:49 pm
PHL
-
BOI
9h 14m
1 stop
American Airlines Logo
2:58 pm - 11:59 pm
BOI
-
PHL
7h 01m
1 stop
$221American Airlines
vie., ago. 21 - lun., ago. 24
Delta Logo
7:00 pm - 11:53 pm
PHL
-
GEG
7h 53m
1 stop
Delta Logo
10:56 pm - 11:05 am
GEG
-
PHL
9h 09m
1 stop
$238Delta
mar., ago. 4 - jue., ago. 13
Delta Logo
7:05 am - 3:18 pm
PHL
-
BOI
10h 13m
1 stop
Delta Logo
6:45 pm - 6:05 am
BOI
-
PHL
9h 20m
1 stop
$238Delta
jue., jul. 9 - vie., jul. 17
American Airlines Logo
4:17 pm - 11:06 pm
PHL
-
GEG
9h 49m
1 stop
American Airlines Logo
2:29 pm - 12:59 am
GEG
-
PHL
7h 30m
1 stop
$279American Airlines
sáb., sep. 26 - lun., sep. 28
Southwest Logo
6:30 am - 10:55 am
PHL
-
BOI
6h 25m
1 stop
Southwest Logo
2:55 pm - 11:45 pm
BOI
-
PHL
6h 50m
1 stop
$282Southwest
sáb., sep. 12 - lun., sep. 21
Alaska Airlines Logo
4:48 pm - 11:11 pm
PHL
-
GEG
9h 23m
1 stop
Alaska Airlines Logo
5:12 am - 3:45 pm
GEG
-
PHL
7h 33m
1 stop
$309Alaska Airlines
mar., oct. 13 - mar., oct. 20
United Airlines Logo
9:34 am - 5:49 pm
PHL
-
JAC
10h 15m
2 stops
United Airlines Logo
12:20 pm - 9:29 pm
JAC
-
PHL
7h 09m
1 stop
$316United Airlines
vie., sep. 4 - mar., sep. 8
Alaska Airlines Logo
4:48 pm - 11:11 pm
PHL
-
GEG
9h 23m
1 stop
Alaska Airlines Logo
12:33 pm - 5:40 am
GEG
-
PHL
14h 07m
1 stop
$317Alaska Airlines
mar., oct. 13 - mar., oct. 20
United Airlines Logo
10:05 am - 3:24 pm
PHL
-
JAC
7h 19m
1 stop
United Airlines Logo
12:20 pm - 11:30 pm
JAC
-
PHL
9h 10m
2 stops
$329United Airlines
Booking Insights

KAYAK's insights & trends for Philadelphia to Idaho flights

Get data-powered insights and trends into flights from Philadelphia to Idaho to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Philadelphia to Idaho?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Philadelphia to Idaho departing in August.

What is the cheapest month to fly from Philadelphia to Idaho?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Idaho, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to Idaho is May, when tickets cost $148 (return) on average. On the other hand, the most expensive months are December and March, when the average cost of round-trip tickets is $446 and $337 respectively.

How far in advance should I book a flight from Philadelphia to Idaho?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Philadelphia to Idaho, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Philadelphia to Idaho, you should book around 2 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$128
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Philadelphia to Boise

FAQs - booking Idaho flights

  • How does KAYAK find such low prices on flights from Philadelphia to Idaho?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Idaho.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Idaho?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Philadelphia to Idaho is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Idaho?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Philadelphia to Idaho with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Idaho?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Philadelphia to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Philadelphia to Idaho

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Idaho. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Idaho? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4235 reviews
8.6Crew
7.5Entertainment
7.0Food
8.0Comfort
8.1Boarding
Airline reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

2.0 MediocreMatthew, Jun 2026
CVG - MDW
Read more Southwest reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

It was great. The gate staff were very helpful in Portland when my son forgot his rolling bag and had to go back to get it just in time to make it on the plane. We really appreciate that. Great job!

Airline is not very senior friendly. Flights are late, forcing us to run to the connecting flight. Food is awful. Wish they would go back to pretzels and peanuts. During flight, pressurization isn’t quite right and all of our ears get plugged. Everything is nickel and dime, charging for boarding, seat selection and legroom. While a screen at the desk in the gate area says check your roll on bag now for free due to space limitation, the employee at the desk will not check the bag without a $100 fee. Insane.

Kayak could’ve posted the correct gate number. Almost missed my flight.

Slow boarding, limited food and drink portions. Bad delays and turbulence

there were two flight attendants that were up front...that were the best! They get KUDOs for making my trip only fantastic. Tell them Jeff said that!

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

Flight coming out of Buffalo was delayed, so we had to be rescheduled on another flight from Baltimore to Phoenix which means we had a long layover and got home 3.5 hours late. Shuttle to parking stopped at 10pm, so we had to pay for an Uber to the parking lot and got charged an extra day of parking since it was after midnight. Not the best experience. Long day!

Was fine, delayed and feels like southwest is always late

I don't know why flying out of Sarasota requires two plane changes.

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Two delays on two separate planes with parts they could not easily find and replace.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

This planes staff was top tier. Everything went great and had a great flight home.

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

This was an overnight flight, and in the morning they did know coffee service. How you can throw passengers in a San Francisco airport at 5:40 a.m. in the morning and not giving them Coffee is a crime.

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

The pilot had to extend the flight time from san antonio to Houston to burn off fuel. This caused a lot of unnecessary stress since we had a tight connection to Aruba. And with no other flights going to Aruba we were worried about spending a night in Houston. We had to to run to our connection because of the flight crews mistake. Not happy.

Service was professional and quick. Premium economy seat was comfortable given the class

I'm a United 1K member and have ben for 10 years. The gate agent had no control over the boarding process and had us passengers queued for hours as delays were announced. On the plane, the overhead air nozzle was broken so col over was powering through on me and the passenger next to me. Not a great experience for a million miler on United. Feel free to contact me. Josh Smigel - DM426089

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

Fine. Nothing to write home about. The plane left on time, and arrived on time.

Flight left early and arrived 30 MINUTES early at the destination. Smooth trip.

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

I appreciate that I finally got the seat I paid extra for this time. Thank you

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

It would have been nice if American tried to care.

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

Everything you need to know for your flight from Philadelphia to Idaho

Information on your arrival and departure airports