IDA - PHL

$377 Find Cheap Flights from Idaho Falls to Philadelphia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Idaho Falls to Philadelphia departing on 6/20. 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 Philadelphia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Idaho Falls to Philadelphia, 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 Idaho Falls to Philadelphia, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$413
Typical prices: $658-$680
Alaska Airlines
Fri 1/30Mon 2/2
IDA - PHL • 1 stop
Cheapest one-way
$377
Alaska Airlines
Sat 6/20
IDA - PHL • 1 stop
Top airlines
Alaska Airlines
Cheapest • from $413 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
April
Cheapest • 61% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Philadelphia!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Idaho Falls to Philadelphia 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 Idaho Falls to Philadelphia

Fri, Jan 30 - Mon, Feb 2
Alaska Airlines Logo
6:58 pm - 6:03 pm
IDA
-
PHL
21h 05m1 stop
Alaska Airlines Logo
7:06 pm - 6:18 pm
PHL
-
IDA
25h 12m1 stop
$413Alaska Airlines
Fri, Feb 6 - Sun, Feb 8
United Airlines Logo
2:40 pm - 11:30 pm
IDA
-
PHL
6h 50m1 stop
United Airlines Logo
8:09 am - 1:30 pm
PHL
-
IDA
7h 21m1 stop
$419United Airlines
Fri, Jan 30 - Mon, Feb 2
American Airlines Logo
7:20 am - 11:40 pm
IDA
-
PHL
14h 20m2 stops
American Airlines Logo
1:40 pm - 10:36 pm
PHL
-
IDA
10h 56m1 stop
$424American Airlines
Fri, Jan 30 - Mon, Feb 2
American Airlines Logo
7:20 am - 11:55 pm
IDA
-
PHL
14h 35m2 stops
American Airlines Logo
9:47 am - 10:36 pm
PHL
-
IDA
14h 49m2 stops
$430American Airlines
Wed, May 13 - Tue, May 19
Alaska Airlines Logo
6:00 am - 4:02 pm
IDA
-
PHL
32h 02m2 stops
Alaska Airlines Logo
5:15 pm - 1:06 pm
PHL
-
IDA
21h 51m1 stop
$453Alaska Airlines
Wed, May 6 - Thu, May 21
Alaska Airlines Logo
4:08 pm - 6:02 am
IDA
-
PHL
11h 54m1 stop
Alaska Airlines Logo
5:15 pm - 1:06 pm
PHL
-
IDA
21h 51m1 stop
$467Alaska Airlines
Fri, Mar 6 - Sun, Mar 8
American Airlines Logo
2:18 pm - 12:54 am
IDA
-
PHL
8h 36m1 stop
American Airlines Logo
7:00 am - 1:48 pm
PHL
-
IDA
8h 48m1 stop
$477American Airlines
Fri, Feb 6 - Sun, Feb 8
American Airlines Logo
7:20 am - 9:05 pm
IDA
-
PHL
11h 45m2 stops
American Airlines Logo
12:08 pm - 10:36 pm
PHL
-
IDA
12h 28m2 stops
$481American Airlines
Sun, Jan 18 - Sun, Jan 25
American Airlines Logo
2:07 pm - 11:26 pm
IDA
-
PHL
7h 19m1 stop
American Airlines Logo
4:00 pm - 10:36 pm
PHL
-
IDA
8h 36m1 stop
$485American Airlines
Fri, Mar 6 - Sun, Mar 8
United Airlines Logo
10:50 am - 12:16 am
IDA
-
PHL
11h 26m2 stops
United Airlines Logo
7:35 am - 1:30 pm
PHL
-
IDA
7h 55m1 stop
$489United Airlines
Booking Insights

KAYAK's insights & trends for Idaho Falls to Philadelphia flights

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Idaho Falls to Philadelphia, 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 Idaho Falls to Philadelphia is April, where tickets cost $279 (return) on average. On the other hand, the most expensive months are September and February, where the average cost of round-trip tickets is $1,726 and $874 respectively.

Good to know

Low seasonFebruary
Cheapest flight$377
Best time to beat the crowds but there is an average 21% increase in price.
Most popular time to fly with an average 4% increase in price.
Flight from Idaho Falls to Philadelphia

When to book flights from Idaho Falls to Philadelphia

Are your dates flexible? Find out the best times to travel from Idaho Falls to Philadelphia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Idaho Falls to Philadelphia

  • What is the cheapest flight from Idaho Falls to Philadelphia?

    In the last 3 days, the lowest price for a flight from Idaho Falls to Philadelphia was $377 for a one-way ticket and $413 for a round-trip.

  • Do I need a passport to fly between Idaho Falls and Philadelphia?

    A passport is not required to fly from Idaho Falls to Philadelphia.

  • Which airports will I be using when flying from Idaho Falls to Philadelphia?

    When flying out of Idaho Falls you will be using Idaho Falls Fanning Field. You will be landing at Philadelphia, also known as Philadelphia.

  • Which aircraft models fly most regularly from Idaho Falls to Philadelphia?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Idaho Falls to Philadelphia?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Idaho Falls and Philadelphia, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Idaho Falls to Philadelphia, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Idaho Falls to Philadelphia are Delta and United Airlines. With an average price for the route of $488 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $906 and an overall rating of 7.4.

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

    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 Idaho Falls to Philadelphia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia from Idaho Falls 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 Idaho Falls to Philadelphia?

    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 to Philadelphia with an airline and back to Idaho Falls with another airline. Booking your flights between Idaho Falls and PHL can sometimes prove cheaper using this method.

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

    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 to Philadelphia from Idaho Falls up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Idaho Falls to Philadelphia

 
See real verified KAYAK customer reviews for airlines flying from Idaho Falls to Philadelphia. 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 Idaho Falls to Philadelphia? 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
DeltaOverall score based on 8017 reviews
7.8Entertainment
8.1Boarding
7.2Food
7.9Comfort
8.5Crew
Airline reviews

Late delayed flight delays boarding and delays leaving and delays on arrival too. Cramped plane no room no food.

2.0 MediocreMartin, Jan 2026
ATL - DTW
Read more Delta reviews

Late delayed flight delays boarding and delays leaving and delays on arrival too. Cramped plane no room no food.

DTW line is too long. The flights from DTW to BWI are always delayed for unknown reasons.

Delta canceled our flight and we had to scramble to find another airline to get home. Phoenix is not a delta hub so they didn’t have another plane. It would have been a red eye though Salt Lake City. Getting in at 5am. No bueno.

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

This flight was a first class choice and left much to be desired. Seat backs on seats were falling apart and torn. Seats actually didn't come to a "full & upright position". Pull out table was sprung. Not any significant leg room. All in all we were on an obviously older plane and felt overcharged for what we received as first class.

Flight was delayed several times. At one point, they "pulled back" 15 minutes from the delayed boarding and sent a text saying we would board sooner than previously advised. The flight then was delayed again. And when we boarded, there was an unspecified technical issue which had us waiting in the plane for about an hour.

Delta is a good airline. I've never had an issue with Delta. I'll continue to fly with them until they show me that I shouldn't.

The only thing nice I can say is the flight crew was really nice and apologetic about the situation. They shared as much information as they had and advised us on what we could do about missing connecting flights. The boarding process was so slow. The gate agent was working by herself and should have had someone working with her. It took almost an hour to board because she was trying to board a full flight of people and provide customer service to everyone who was flying standby and/or had questions. It was really chaotic. This didn't help the fact that we were delayed and folks were missing connections the longer it took.

The gate attendants and the crew were terrible. Because of high winds, they needed to carry more fuel, so they had to get volunteers to take the next flight at 6 am the next day. They did a terrible job of it - our flight ended up taking off just under 3 hours of the scheduled time. I hope to never fly Delta again.

Did not realize internet screen was hidden between seats and no info printed!!!!

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

United is an incompetent airline. They parked the plane on the tarmac for an hour after arriving because they “didn’t have a gate available” it was actually some sort of lie because as we de planed there were approximately 9 open and manned and empty gates that we walked past. Many people on the flight missed connections for the hour long sit on the tarmac. Utterly baffling and incompetent behavior from United flight ops.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Crew were all friendly and helpful. It was a short flight so just a beverage service with a cookie. After we were boarded the plane took about 45 minutes to leave the gate but it was New Year’s Eve so not shocking there was some delay. Overall good experience and very grateful.

the trip to madrid was uncomfortable with my legs touching the seat in front of me

Very crowded flight but what can you expect these days?? Crew was accommodating.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

Internet was a bit expensive and did not work ask that week otherwise a good flight

The flight had a delay that made me being in a real rush to take the second flight. The delay was almost for 2 hours. They moved us from gate to gate in 4 times. Once I arrived to Philadelphia, I got to run thorough all the airport, as the train was already closed by that time. So I got sick with asthma for all the running I had to do. And I was the last one to board, when it was almost closed. So irresponsable with the people

The plane was probably full boarding was easy. We were able to check our carry-on luggage for free. It was a return flight through Philly to LA. Never saw a stewardess do a demonstration of emergency Procedures. I think my flight was pretty full

Overall, a good experience. The food, however, was subpar. The breakfast was a joke.

I was late from Jacksonville, FL but the limited interaction I had with the Philly crew was great.

The delays and cancellations kept me stuck in Miami for an additional 24 hours, and the whole thing seemed extremely disorganized

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

Information on your arrival and departure airports