$104 Find Cheap Flights from Philadelphia to Idaho

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 1/7. 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

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
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Cheap Flights from Philadelphia to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boise1 stop$174
Idaho Falls
Idaho Falls1 stop$388
Hailey
Hailey1 stop$340
Twin Falls
Twin Falls2 stops$542
Pocatello
Pocatello1 stop$482
Spokane
Spokane2 stops$222
Boise
Boise1 stop$174
Idaho Falls
Idaho Falls1 stop$388
Hailey
Hailey1 stop$340
Twin Falls
Twin Falls2 stops$542
Pocatello
Pocatello1 stop$482
Spokane
Spokane2 stops$222

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

Thu, Oct 16 - Fri, Oct 24
Frontier Logo
6:42 am - 11:43 amPHL-BOI
7h 01m1 stop
Frontier Logo
12:28 pm - 5:19 amBOI-PHL
14h 51m1 stop
$174Frontier
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Thu, Oct 16 - Fri, Oct 24
Frontier Logo
6:42 am - 11:43 amPHL-BOI
7h 01m1 stop
Frontier Logo
12:28 pm - 11:00 amBOI-PHL
20h 32m2 stops
$200Frontier
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Wed, Nov 12 - Sat, Nov 15
Southwest Logo
1:50 pm - 10:00 pmPHL-GEG
11h 10m2 stops
Southwest Logo
5:05 am - 7:45 pmGEG-PHL
11h 40m2 stops
$222Southwest
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Wed, Nov 12 - Tue, Nov 18
Delta Logo
6:30 am - 12:11 pmPHL-GEG
8h 41m1 stop
Delta Logo
6:00 am - 6:09 pmGEG-PHL
9h 09m1 stop
$233Delta
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Wed, Nov 12 - Sat, Nov 15
United Airlines Logo
6:00 am - 3:21 pmPHL-GEG
12h 21m2 stops
United Airlines Logo
5:10 am - 3:42 pmGEG-PHL
7h 32m1 stop
$238United Airlines
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Tue, Nov 11 - Tue, Nov 18
Delta Logo
7:10 am - 2:54 pmPHL-GEG
10h 44m2 stops
Delta Logo
7:38 pm - 9:25 amGEG-PHL
10h 47m2 stops
$243Delta
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Wed, Feb 4 - Tue, Feb 10
American Airlines Logo
7:00 am - 1:22 pmPHL-BOI
8h 22m1 stop
American Airlines Logo
1:20 pm - 11:32 pmBOI-PHL
8h 12m1 stop
$243American Airlines
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Thu, Feb 5 - Tue, Feb 10
Southwest Logo
5:25 pm - 10:10 pmPHL-GEG
7h 45m1 stop
Southwest Logo
6:20 am - 8:20 pmGEG-PHL
11h 00m2 stops
$256Southwest
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Mon, Nov 3 - Mon, Nov 17
American Airlines Logo
3:56 pm - 11:09 pmPHL-GEG
10h 13m1 stop
American Airlines Logo
1:14 pm - 11:47 pmGEG-PHL
7h 33m1 stop
$265American Airlines
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Thu, Oct 2 - Sun, Oct 5
United Airlines Logo
6:30 am - 11:39 amPHL-BOI
7h 09m1 stop
United Airlines Logo
3:10 pm - 12:45 amBOI-PHL
7h 35m1 stop
$331United Airlines
Find Deal
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.

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 August, when tickets cost $373 (return) on average. On the other hand, the most expensive months are December and November, when the average cost of round-trip tickets is $596 and $562 respectively.

What’s the cheapest day of the week to fly from Philadelphia to Idaho?

The average price of all round-trip flights from Philadelphia to Idaho clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Idaho on a Tuesday and more expensive on a Sunday. On your return trip to Philadelphia, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

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 4 weeks before departure, which saves you about 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$104
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 9% increase in price.
Flight from Philadelphia to Spokane

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.

  • What is the cheapest time of day to fly to Idaho?

    The cheapest time of day to fly to Idaho is generally in the afternoon, when round-trip flights cost $302 on average. Morning departures are around 1% cheaper than evening flights, on average. The most expensive time of day to fly to Idaho is generally at night, which is peak travel time and where the average cost of a ticket is $655.

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.
8.0
SouthwestOverall score based on 4248 reviews
8.6Crew
8.1Boarding
7.5Entertainment
7.0Food
8.0Comfort
Airline reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

10.0 ExcellentG, Sep 2025LAS - ATL
Read more Southwest reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

There was no food available for this red eye... one little waffle cookie for a 6+ hour flight... thank God I was able to sleep some

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

Did not get the seat I selected and paid for.

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

Flight was delayed and after being in the airport for like seven hours, it was canceled.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

Overall very good, only complaint I have is the crew from CLT to SAT could have collected trash sooner.

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

We started with trouble checking in 24 hours early. Then my husband did not get his TSA precheck. Finally flight delayed due to no crew. I know things happen

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

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

Information on your arrival and departure airports

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