$147 Cheap Flights from Boise (BOI) to Philadelphia (PHL)

View $147 flight on Thu, Nov 13, 2025Opens in a new window

Popular airlines from Boise Airport (BOI) to Philadelphia Intl. Airport (PHL)

Cheap Flights from Boise to Philadelphia (BOI-PHL)

Prices were available within the past 7 days and start at $147 for one-way flights and $221 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Nov 13 - Mon, Nov 24
BOI
Boise
PHL
Philadelphia
$221 Roundtrip, found 4 days ago
$221
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Boise to Philadelphia, returning Mon, Nov 24, priced at $221 found 4 days ago
Frontier Airlines
Thu, Nov 13 - Tue, Nov 25
BOI
Boise
PHL
Philadelphia
$242 Roundtrip, found 4 days ago
$242
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Boise to Philadelphia, returning Tue, Nov 25, priced at $242 found 4 days ago
Frontier Airlines
Thu, Nov 13 - Sun, Nov 23
BOI
Boise
PHL
Philadelphia
$253 Roundtrip, found 4 days ago
$253
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Boise to Philadelphia, returning Sun, Nov 23, priced at $253 found 4 days ago
Frontier Airlines
Thu, Nov 6 - Thu, Nov 13
BOI
Boise
PHL
Philadelphia
$256 Roundtrip, found 2 days ago
$256
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Nov 6 from Boise to Philadelphia, returning Thu, Nov 13, priced at $256 found 2 days ago
Frontier Airlines
Thu, Nov 6 - Mon, Nov 24
BOI
Boise
PHL
Philadelphia
$317 Roundtrip, found 3 days ago
$317
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Thu, Nov 6 from Boise to Philadelphia, returning Mon, Nov 24, priced at $317 found 3 days ago
Frontier Airlines
Thu, Dec 25 - Fri, Jan 2
BOI
Boise
PHL
Philadelphia
$323 Roundtrip, found 1 day ago
$323
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Dec 25 from Boise to Philadelphia, returning Fri, Jan 2, priced at $323 found 1 day ago
American Airlines
Thu, Dec 18 - Thu, Dec 25
BOI
Boise
PHL
Philadelphia
$325 Roundtrip, found 4 days ago
$325
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Dec 18 from Boise to Philadelphia, returning Thu, Dec 25, priced at $325 found 4 days ago
Delta
Thu, Dec 18 - Thu, Dec 25
BOI
Boise
PHL
Philadelphia
$325 Roundtrip, found 4 days ago
$325
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Dec 18 from Boise to Philadelphia, returning Thu, Dec 25, priced at $325 found 4 days ago
Hawaiian Airlines
Wed, Feb 18 - Mon, Mar 2
BOI
Boise
PHL
Philadelphia
$325 Roundtrip, found 5 days ago
$325
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Wed, Feb 18 from Boise to Philadelphia, returning Mon, Mar 2, priced at $325 found 5 days ago
Alaska Airlines
Thu, Feb 19 - Wed, Feb 25
BOI
Boise
PHL
Philadelphia
$328 Roundtrip, found 6 days ago
$328
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Feb 19 from Boise to Philadelphia, returning Wed, Feb 25, priced at $328 found 6 days ago

Find the cheapest month to fly from Boise (BOI) to Philadelphia (PHL)

March is typically the cheapest month to fly

From $202 - $620 per traveler.

Alternative airports near Philadelphia

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Philadelphia Intl. PHL. Cheapest and Closest option available. Average driving time to city center is 17 minutes. Flights from $488
PHL
Philadelphia Intl.
CheapestClosest
Average driving time to city center17 min
Flights from $488

Frequently asked questions

How much does a flight from Boise Airport (BOI) to Philadelphia Intl. Airport (PHL) cost?
Secure a cheap one-way flight from $147 or cheap return flight from $221 from Boise Airport (BOI) to Philadelphia Intl. Airport (PHL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Boise Airport (BOI) to Philadelphia Intl. Airport (PHL)?
Flying in November may help you find better deals, as it's the cheapest month for flights between BOI and PHL. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Boise Airport (BOI) to Philadelphia Intl. Airport (PHL)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest BOI to PHL flight.
How many flights per day from Boise Airport (BOI) to Philadelphia Intl. Airport (PHL)?
Direct flights from Boise Airport (BOI) to Philadelphia Intl. Airport (PHL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BOI to PHL?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change based on various factors, including the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Boise Airport (BOI) to Philadelphia Intl. Airport (PHL)?
To touch down at Philadelphia Intl. Airport (PHL) without delays, book a flight that leaves from Boise Airport (BOI) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Boise Airport (BOI) to Philadelphia Intl. Airport (PHL) last-minute?
Waiting until just before your departure to book a flight from BOI to PHL often results in higher prices. While it's possible to find some last-minute discounts, they aren't always guaranteed. Keep your travel plans flexible to maximize your chances of landing a bargain.
Is it cheaper to book a BOI to PHL flight and hotel package?
Opting for a BOI to PHL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Select from our extensive range of accommodations and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Boise Airport (BOI) to Philadelphia Intl. Airport (PHL)?
Usually, it's possible to reschedule or cancel your BOI to PHL flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Boise
Destination airport
Philadelphia Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$221
Distance
2106 mi

Book with confidence

Boise to Philadelphia Flights

The cheapest times to fly from Boise to Philadelphia

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Boise to Philadelphia are during the month of November. You can find some of the cheapest flights from Boise to Philadelphia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boise to Philadelphia

Sunday is one of the best days to book for cheap flights from Boise to Philadelphia: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Boise to Philadelphia

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Boise to Philadelphia in 2025. You can also book with separate airlines for your outbound and return journeys, from $147 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Boise to Philadelphia flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Boise to Philadelphia airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Boise to Philadelphia Flights

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*Available to One Key members.