What are the cheapest airlines flying from Philadelphia to Boise round-trip?

Our cheapest airline available from Philadelphia to Boise is Frontier. Our recent data shows that you can find tickets from as low as $275 on this airline. Additional options worth looking into are Spirit Airlines and Delta, starting at $314 and $325 round-trip. Frontier is priced at 43% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Philadelphia to Boise one-way?

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $138. American Airlines flights start at $163 while deals on Delta start at $168 one-way.

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

Travelers seeking maximum savings on their Philadelphia to Boise flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Boise ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Boise when rainfall is around 0.2 in.

If weather is an important factor for your trip to Boise, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

What are the most popular airlines that fly from Philadelphia to Boise?

Before booking your flight from Philadelphia to Boise check out the most popular airlines for this route: American Airlines, Delta or United Airlines.

What is the cheapest day to fly round-trip from Philadelphia to Boise?

Departing on a Monday is a good option for securing a great price. You can expect to save up to 46% when planning your travel around this day of the week.

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

Find a great deal and save up to 135% by booking at least 12 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Philadelphia to Boise within the next two weeks, with the cheapest ticket starting at $278.

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

Our data shows that August tends to be the cheapest month to fly to Boise from Philadelphia. Users have commonly found prices around $489 for the month, but tickets can be as low as $217. Due to multiple factors, prepare for potentially higher prices in November.

Can I find deals for flights from Philadelphia to Boise that include hotel bookings?

Yes. In addition to deals on Philadelphia to Boise flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Philadelphia to Boise?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Boise.

Can I find deals for business class flights from Philadelphia to Boise?

Yes. Cheapflights offers flight deals from Philadelphia to Boise by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$138+ Flights from Philadelphia to Boise

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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Philadelphia to Boise Air Term. Gowen Fld are usually found in August or September, booked 83 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Philadelphia to Boise

Round-trip from	$275 (Frontier)
One-way from	$138 (Cheapflightsfares)
Popular in	November
Cheapest in	August
Average price	$441

From Philadelphia to Boise Air Term. Gowen Fld

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One-way flight from Philadelphia to Boise Air Term. Gowen Fld

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Highest demand for flights based on searches. 18% potential increase in price ($109 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from Philadelphia to Boise

Cheapest flights from Philadelphia to Boise
Explore the most affordable flight options available from Philadelphia to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Thu 9/116:45 amPHL - BOI

1 stop6h 52mFrontier

Thu 9/1812:22 pmBOI - PHL

1 stop10h 35mFrontier

Deal found 7/27

$275

Thu 9/256:46 pmPHL - BOI

2 stops27h 35mSpirit Airlines

Sun 9/282:16 pmBOI - PHL

1 stop13h 54mSpirit Airlines

Deal found 7/29

$314

Sat 10/117:00 pmPHL - BOI

1 stop6h 54mDelta

Sat 10/183:00 pmBOI - PHL

1 stop6h 49mDelta

Deal found 7/28

$325

Tue 8/261:20 pmPHL - BOI

1 stop10h 23mAmerican Airlines

Tue 9/25:15 pmBOI - PHL

1 stop10h 10mAmerican Airlines

Deal found 7/27

$344

Wed 10/17:22 amPHL - BOI

2 stops14h 16mAlaska Airlines

Wed 10/81:35 pmBOI - PHL

1 stop14h 05mAlaska Airlines

Deal found 7/28

$357

Mon 9/155:30 amPHL - BOI

3 stops16h 51mMultiple Airlines

Thu 9/182:16 pmBOI - PHL

1 stop13h 54mMultiple Airlines

Deal found 7/29

$359

Wed 11/54:00 pmPHL - BOI

2 stops9h 10mSouthwest

Mon 11/105:00 amBOI - PHL

1 stop8h 25mSouthwest

Deal found 7/27

$376

Best flights from Philadelphia to Boise
Discover carefully curated flight deals from Philadelphia to Boise that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Thu 9/116:45 amPHL - BOI

1 stop6h 52mFrontier

Thu 9/1812:22 pmBOI - PHL

1 stop10h 35mFrontier

Deal found 7/27

$275

Thu 9/256:46 pmPHL - BOI

2 stops27h 35mSpirit Airlines

Sun 9/282:16 pmBOI - PHL

1 stop13h 54mSpirit Airlines

Deal found 7/29

$314

Sat 10/117:00 pmPHL - BOI

1 stop6h 54mDelta

Sat 10/183:00 pmBOI - PHL

1 stop6h 49mDelta

Deal found 7/28

$325

Tue 8/261:20 pmPHL - BOI

1 stop10h 23mAmerican Airlines

Tue 9/25:15 pmBOI - PHL

1 stop10h 10mAmerican Airlines

Deal found 7/27

$344

Wed 10/17:22 amPHL - BOI

2 stops14h 16mAlaska Airlines

Wed 10/81:35 pmBOI - PHL

1 stop14h 05mAlaska Airlines

Deal found 7/28

$357

Mon 9/155:30 amPHL - BOI

3 stops16h 51mMultiple Airlines

Thu 9/182:16 pmBOI - PHL

1 stop13h 54mMultiple Airlines

Deal found 7/29

$359

Wed 11/54:00 pmPHL - BOI

2 stops9h 10mSouthwest

Mon 11/105:00 amBOI - PHL

1 stop8h 25mSouthwest

Deal found 7/27

$376

Last-minute flights from Philadelphia to Boise
Discover last-minute flight deals from Philadelphia to Boise. Data last updated July 29, 2025 and is based on user searches.

Thu 7/316:45 amPHL - BOI

1 stop10h 19mHawaiian Airlines

Sat 8/27:12 pmBOI - PHL

1 stop8h 13mHawaiian Airlines

Deal found 7/27

$704

Sun 8/36:15 amPHL - BOI

1 stop7h 31mFrontier

Thu 8/712:36 pmBOI - PHL

1 stop7h 33mFrontier

Deal found 7/28

$375

Sun 8/39:12 pmPHL - BOI

2 stops23h 40mMultiple Airlines

Thu 8/77:08 pmBOI - PHL

1 stop13h 26mMultiple Airlines

Deal found 7/28

$482

Mon 8/45:10 pmPHL - BOI

2 stops9h 55mSouthwest

Thu 8/710:25 amBOI - PHL

1 stop6h 20mSouthwest

Deal found 7/28

$632

Fri 8/86:00 amPHL - BOI

1 stop8h 29mAmerican Airlines

Mon 8/185:15 pmBOI - PHL

1 stop10h 10mAmerican Airlines

Deal found 7/27

$531

Fri 8/87:10 amPHL - BOI

1 stop6h 50mDelta

Mon 8/1812:45 pmBOI - PHL

2 stops10h 11mDelta

Deal found 7/28

$535

Wed 8/136:30 amPHL - BOI

1 stop9h 28mUnited Airlines

Sun 8/177:15 pmBOI - PHL

1 stop8h 11mUnited Airlines

Deal found 7/27

$502

Tue 8/261:20 pmPHL - BOI

1 stop10h 23mAmerican Airlines

Tue 9/25:15 pmBOI - PHL

1 stop10h 10mAmerican Airlines

Deal found 7/27

$344

Tue 8/266:00 amPHL - BOI

2 stops11h 40mDelta

Fri 8/291:30 pmBOI - PHL

1 stop9h 26mDelta

Deal found 7/27

$376

Tue 8/263:40 pmPHL - BOI

2 stops9h 25mSouthwest

Tue 9/26:00 amBOI - PHL

2 stops9h 40mSouthwest

Deal found 7/27

$448

Thu 8/289:00 amPHL - BOI

1 stop10h 11mSpirit Airlines

Mon 9/16:06 pmBOI - PHL

1 stop27h 53mSpirit Airlines

Deal found 7/27

$343

One-way flights from Philadelphia to Boise
Search for one-way flight options from Philadelphia to Boise. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Fri 9/196:45 amPHL - BOI

1 stop6h 52mFrontier

Deal found 7/27

$138

Wed 8/276:00 amPHL - BOI

1 stop8h 29mAmerican Airlines

Deal found 7/27

$163

Tue 8/2611:35 amPHL - BOI

2 stops12h 07mDelta

Deal found 7/27

$168

Fri 9/196:35 amPHL - BOI

3 stops32h 46mSpirit Airlines

Deal found 7/27

$184

Fri 8/296:27 pmPHL - BOI

2 stops17h 25mUnited Airlines

Deal found 7/27

$277

Tue 8/56:45 amPHL - BOI

1 stop9h 13mHawaiian Airlines

Deal found 7/28

$313

Sun 8/312:06 pmPHL - BOI

3 stops32h 46mMultiple Airlines

Deal found 7/27

$417

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 9/11

6:45 am-11:37 am

1 stop6h 52m

Boise Air Term. Gowen Fld

Thu 9/18

12:22 pm-12:57 am

1 stop10h 35m

$275

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Thu 9/25

6:46 pm-8:21 pm

2 stops27h 35m

Boise Air Term. Gowen Fld

Sun 9/28

2:16 pm-6:10 am

1 stop13h 54m

$314

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Sat 10/11

7:00 pm-11:54 pm

1 stop6h 54m

Boise Air Term. Gowen Fld

Sat 10/18

3:00 pm-11:49 pm

1 stop6h 49m

$325

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 8/26

1:20 pm-9:43 pm

1 stop10h 23m

Boise Air Term. Gowen Fld

Tue 9/2

5:15 pm-5:25 am

1 stop10h 10m

$344

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 10/1

7:22 am-7:38 pm

2 stops14h 16m

Boise Air Term. Gowen Fld

Wed 10/8

1:35 pm-5:40 am

1 stop14h 05m

$357

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Mon 9/15

5:30 am-8:21 pm

3 stops16h 51m

Boise Air Term. Gowen Fld

Thu 9/18

2:16 pm-6:10 am

1 stop13h 54m

$359

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 11/5

4:00 pm-11:10 pm

2 stops9h 10m

Boise Air Term. Gowen Fld

Mon 11/10

5:00 am-3:25 pm

1 stop8h 25m

$376

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Fri 9/19

6:45 am-11:37 am

1 stop6h 52m

$138

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Wed 8/27

6:00 am-12:29 pm

1 stop8h 29m

$163

PhiladelphiaBoise

PHL - BOI

PHLBOI

Philadelphia

Tue 8/26

11:35 am-9:42 pm

2 stops12h 07m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 14 results

Best time to book a flight from Philadelphia to Boise

Have a flexible travel schedule? Discover the best time to fly to Boise from Philadelphia with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

To ensure you get the cheapest price possible for a flight from Philadelphia to Boise, you should look to book at least 83 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Philadelphia to Boise?

Currently, October is the cheapest month in which you can book a flight from Philadelphia to Boise (average of $314). Flying from Philadelphia to Boise in June is currently the most expensive (average of $398). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to BOI?

It’s optimal to fly from Philadelphia to Boise at noon. By choosing this option you can save up to 54% on the cost of your flight, compared to a flight in the evening.

Reviews of airlines servicing Boise

See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Philadelphia to Boise have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Southwest

8.0

Very good

4,238 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Delta

8.0

Very good

7,979 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Hawaiian Airlines

7.8

Good

2,605 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

United Airlines

7.4

Good

8,896 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

What are the cheapest airlines flying from Philadelphia to Boise round-trip?
Our cheapest airline available from Philadelphia to Boise is Frontier. Our recent data shows that you can find tickets from as low as $275 on this airline. Additional options worth looking into are Spirit Airlines and Delta, starting at $314 and $325 round-trip. Frontier is priced at 43% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Philadelphia to Boise one-way?
To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $138. American Airlines flights start at $163 while deals on Delta start at $168 one-way.
Can I find deals for flights from Philadelphia to Boise that include hotel bookings?
Yes. In addition to deals on Philadelphia to Boise flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Philadelphia to Boise?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Boise.
Can I find deals for business class flights from Philadelphia to Boise?
Yes. Cheapflights offers flight deals from Philadelphia to Boise by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Philadelphia to Boise?
Currently, October is the cheapest month in which you can book a flight from Philadelphia to Boise (average of $314). Flying from Philadelphia to Boise in June is currently the most expensive (average of $398). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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McCall

Caldwell

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Other flights to Boise

Top 4 airlines flying from Philadelphia to Boise

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$325	Average$475	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$336	Average$506	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$362	Average$448	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$429	Average$555	FlexibilityNo cancel fee	On-time69%

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$138+ Cheap flights from Philadelphia to Boise (PHL - BOI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/19. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Philadelphia to Boise with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Philadelphia to Boise Air Term. Gowen Fld are usually found in August or September, booked 83 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Philadelphia to Boise

Round-trip from

One-way from

Popular in

Cheapest in

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Find flight deals from Philadelphia to Boise

Cheapest flights from Philadelphia to BoiseExplore the most affordable flight options available from Philadelphia to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from Philadelphia to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Philadelphia to Boise that are best for you.

Best time to book a flight from Philadelphia to Boise

Have a flexible travel schedule? Discover the best time to fly to Boise from Philadelphia with our price prediction graph.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Boise. Price data was last updated on July 25, 2025.

What is the cheapest month to book a flight from Philadelphia to Boise?

What is the cheapest time of day to fly from PHL to BOI?

Find hourly flight availability from Philadelphia to Boise. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

Reviews of airlines servicing Boise

Get insights into the airlines that provide service to Boise. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boise. Reviews last updated July 29, 2025.

See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Philadelphia to Boise have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Boise. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from Philadelphia to Boise round-trip?

What are the cheapest airlines to fly from Philadelphia to Boise one-way?

Can I find deals for flights from Philadelphia to Boise that include hotel bookings?

How can I find direct flights from Philadelphia to Boise?

Can I find deals for business class flights from Philadelphia to Boise?

What is the cheapest month to book a flight from Philadelphia to Boise?

Traveling to a place near Boise?

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Alternative routes for Philadelphia to Boise

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Top 4 airlines flying from Philadelphia to Boise

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Cheapest flights from Philadelphia to Boise
Explore the most affordable flight options available from Philadelphia to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.