BOI - PHL

$129 Find Cheap Flights from Boise 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 Boise to Philadelphia departing on 4/22. 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 Boise 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 Boise to Philadelphia, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$297
Overall average: $375
Frontier
Thu 4/30Wed 5/6
BOI - PHL • 2 stops
Cheapest one-way
$129
Typical prices: $174-$308
Alaska Airlines
Wed 4/22
BOI - PHL • 1 stop
Top airlines
Frontier
Cheapest • from $289 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 28% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 24% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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 Boise to Philadelphia (BOI-PHL)

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

Thu, Apr 30 - Wed, May 6
Frontier Logo
11:53 am - 11:02 am
BOI
-
PHL
21h 09m
2 stops
Frontier Logo
8:25 pm - 11:08 am
PHL
-
BOI
16h 43m
1 stop
$297Frontier
Thu, Apr 9 - Wed, Apr 15
Frontier Logo
12:03 pm - 4:39 pm
BOI
-
PHL
26h 36m
2 stops
Frontier Logo
8:25 pm - 11:08 am
PHL
-
BOI
16h 43m
1 stop
$306Frontier
Thu, Apr 30 - Wed, May 6
Frontier Logo
11:53 am - 5:34 am
BOI
-
PHL
15h 41m
1 stop
Frontier Logo
8:25 pm - 11:08 am
PHL
-
BOI
16h 43m
1 stop
$307Frontier
Thu, Apr 9 - Wed, Apr 15
Frontier Logo
12:03 pm - 5:31 am
BOI
-
PHL
15h 28m
1 stop
Frontier Logo
8:25 pm - 11:08 am
PHL
-
BOI
16h 43m
1 stop
$308Frontier
Thu, Apr 30 - Wed, May 6
Frontier Logo
11:53 am - 11:02 am
BOI
-
PHL
21h 09m
2 stops
Frontier Logo
8:25 pm - 11:08 am
PHL
-
BOI
16h 43m
1 stop
$316Frontier
Tue, Mar 10 - Tue, Mar 17
United Airlines Logo
8:39 am - 9:31 pm
BOI
-
PHL
10h 52m
1 stop
United Airlines Logo
3:30 pm - 9:29 pm
PHL
-
BOI
7h 59m
1 stop
$317United Airlines
Tue, Mar 10 - Tue, Mar 17
United Airlines Logo
2:40 pm - 11:32 pm
BOI
-
PHL
6h 52m
1 stop
United Airlines Logo
12:15 pm - 9:29 pm
PHL
-
BOI
11h 14m
2 stops
$322United Airlines
Thu, Apr 9 - Tue, Apr 14
Delta Logo
8:00 am - 5:38 pm
BOI
-
PHL
7h 38m
1 stop
Delta Logo
3:42 pm - 10:28 pm
PHL
-
BOI
8h 46m
1 stop
$331Delta
Thu, Apr 30 - Wed, May 6
Frontier Logo
11:53 am - 5:34 am
BOI
-
PHL
15h 41m
1 stop
Frontier Logo
8:25 pm - 11:08 am
PHL
-
BOI
16h 43m
1 stop
$332Frontier
Thu, Apr 9 - Tue, Apr 14
Delta Logo
7:30 pm - 8:46 am
BOI
-
PHL
11h 16m
2 stops
Delta Logo
5:44 am - 1:07 pm
PHL
-
BOI
9h 23m
1 stop
$336Delta
Booking Insights

KAYAK's insights & trends for Boise to Philadelphia flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boise 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 Boise to Philadelphia is January, where tickets cost $371 (return) on average. On the other hand, the most expensive months are February and December, where the average cost of round-trip tickets is $663 and $628 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boise to Philadelphia, 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 Boise to Philadelphia, you should book around 3 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$129
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Boise to Philadelphia

When to book flights from Boise to Philadelphia

Are your dates flexible? Find out the best times to travel from Boise 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 Boise to Philadelphia

  • What is the cheapest flight from Boise to Philadelphia?

    In the last 3 days, the lowest price for a flight from Boise to Philadelphia was $129 for a one-way ticket and $289 for a round-trip.

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

    No

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

    On your way to Philadelphia, you’ll fly out from Boise Air Term. Gowen Fld. You’ll be landing at Philadelphia.

  • Which aircraft models fly most regularly from Boise to Philadelphia?

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

  • Which airline alliances offer flights from Boise to Philadelphia?

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

  • Which is the best airline for flights from Boise to Philadelphia, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Boise to Philadelphia are Southwest and Delta. With an average price for the route of $486 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $431 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Boise 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 Boise to Philadelphia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia from Boise 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 Boise 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 Boise with another airline. Booking your flights between Boise 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 Boise 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 Boise up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Boise to Philadelphia

 
See real verified KAYAK customer reviews for airlines flying from Boise 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 Boise 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.
8.0
SouthwestOverall score based on 4280 reviews
8.0Comfort
8.6Crew
7.5Entertainment
7.0Food
8.1Boarding
Airline reviews

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

2.0 MediocreDavid, Feb 2026
SAN - LAS
Read more Southwest reviews

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

My flight from Denver to Minneapolis was excellent. My flight from Minneapolis to Denver was one of the worst I flights I have ever experienced. I had a window seat, the gentleman in the middle seat was morbidly obese and SW should have made him purchase two seats. His elbow dug into my arm most of the way even after I asked to please be careful. I was literally squashed between the him and the window with no wiggle room. The plane was full so it was not possible to ask for a different seat. I realize I should have complained to the flight attendant but I didn't feel anything could be done to rectify the situation. I fly SW often, I will continue to do so as this was my first negative experience.

I was assigned seat 7E, yet my boarding was Group 5, which caused me to have to put my luggage in the back of the plance above `19 or 20 aisle, as passengers who had boarded earlier took the overhead bins in the front. SW needs to monitor bin space and ensure that bin space above the seat are aligned to those sitting near their seats. Also the seating assignments needs to align with group number. Maybe board those last first and so on? Having said the ALL the passengers on the plane were gracious enough to allow me and other passengers in this dilema to retrieve our luggage and helped us along the way. I always love the flight staff, as always their fantastic and I can't rave about them enough!

I appreciate the staff who allowed me to board though I arrived a little late! Regarding the assigned seating, I had booked my flight before this change and wasn't aware of the change at the time, and so I didn't select a seat at booking as I didn't realize it was relevant. Better communication about the change would have been helpful for preparing.

Flight attendants very hospitable and friendly. Pilot flew a smooth take off and landing.

Paid for premium extra leg room but the bin space for rows 1-3 had to go in rows 4-6 and 4-6 had to go to 7-9 because flight attendants have snacks and their luggage upfront. So we pay extra to have to fight thru traffic to get our bags. Only 2nd day of new seating so hope they fix this.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Paid for wifi that didn't work. No plug in seat to work. No entertainment.

We departed early and made up time in the air allowing us to arrive 30 minutes early. Capt was incredibly genuine and thanked every passenger for flying with Delta. Completely humble and professional!

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

This was one of the worst flights I’ve been on in years. I upgraded to comfort and had such an uncomfortable experience. The person next to me was oversized - which I understand - however, they took up their space and mine. I could only use about 50% of my seat space to not be physically touching this person the entire flight and there was no spatial awareness. I also could not use the seat outlet because their body was obstructing it. It was very inconvenient. Their body kept touching me repeatedly during the flight and I felt very uncomfortable. To pay more for an upgraded space and then not even being able to use it was highly disappointing.

No wheel chair as requested at Atlanta arrival on first flight.

Only freetext wifi was available in flight; browsing WiFi required payment. Since the seats had no in flight entertainment, Delta should revisit this policy on this longer flight.

Only water, tea or coffee served midflight, even to comfort seating. Man next to me needed two seats and took up a portion of my seat and Delta did nothing.

The flight was great as well as the airline staff

First class and monitors weren’t working for mine & my husbands. Eventually fixed, but quite annoyed as we bought first class. Also, No foot rests.

Both of my flights arrived early and check in process was smooth

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Much better than Spirit. I was please by the easy fast check in and boarding

Everything was on time Will use united again for sure

Plane outlets in my row not working to charge phone. Staff response was, well it should be. Plug into seed for volume not working well. Had to find the sweet spot for plug in or it would shut off and on.

Fine not above and beyond as I had a connection that was delayed due to maintenance

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

I upgraded my seat and was promised it would be next to the emergency door for extra leg room and they said it was premium plus but it was at the back of the plane...same thing happened from Newark to Dubai

Everything except the food and entertainment. It was a great experience though

Awful. Original flight was delayed 5 hours. Had to to take a connecting flight instead of direct. Had a 4 hour layover. I missed all of my morning meetings getting in 5 hours later than I was supposed to and had to change to take a later flight the next day to get them back in which cia time another $150.

I was trying to take 2 one and a half hour one way trips and I experienced almost 20 delays over the course of those two trips. Only a few of them were due to weather the rest was disorganization

The attendants were kind and helpful. A sugar-free drink would have been very welcome.

The entertainment options were at best, fair. It was exactly the same as my outbound flight. It would have been more entertaining if there were some series from Apple TV, HBO, Showtime or other carriers for me to catch up with.

The seat cushions were very worn so they were extremely uncomfortable.

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

There was no food and no entertainment, so I'm not sure why these are even in the survey, as my understanding is frontier does not ever offer food without a few, not even a snack, and there are no screens so unless the flight safety talk is our entertainment why ask how we liked it?. One of the flight attendants say in the back of the plane as people filed in to their seats, yelling orders about where to put baggage and telling people to hurry up. It was the least professional experience I've ever had on a flight.

Very well recently! Frontier is improving and less harrassing customer on luggages! Positive!

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

Plane and crew on board were fine. Everything else was terrible.

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

Information on your arrival and departure airports