Cheap Flights from Philadelphia (PHL) to Boulder (WBU)

Popular airlines from Philadelphia Intl. Airport (PHL) to Boulder, CO (WBU-Boulder Municipal)

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Frequently asked questions

How much does a flight from Philadelphia Intl. Airport (PHL) to Boulder, CO (WBU-Boulder Municipal) cost?
Secure a cheap one-way flight or cheap return flight from Philadelphia Intl. Airport (PHL) to Boulder, CO (WBU-Boulder Municipal) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Philadelphia Intl. Airport (PHL) to Boulder, CO (WBU-Boulder Municipal)?
Flying in is a good way to save, as it's the cheapest month for flights between PHL and WBU. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Philadelphia Intl. Airport (PHL) to Boulder, CO (WBU-Boulder Municipal)?
To find the cheapest airline that'll fly you from PHL to WBU, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Philadelphia Intl. Airport (PHL) to Boulder, CO (WBU-Boulder Municipal)?
There are no daily nonstop flights available from Philadelphia Intl. Airport (PHL) to Boulder, CO (WBU-Boulder Municipal). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be on your way before you know it.
What day of the week has the most flights from PHL to WBU?
Typically you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can vary depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Philadelphia Intl. Airport (PHL) to Boulder, CO (WBU-Boulder Municipal)?
To avoid potential delays on the Philadelphia Intl. Airport (PHL) to Boulder, CO (WBU-Boulder Municipal) route, aim to travel before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**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.
What airports do you fly into for Boulder from Philadelphia Intl. Airport (PHL)?
If you've booked a direct flight from Philadelphia Intl. Airport (PHL) to Boulder, Denver Intl. Airport (DEN) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Philadelphia Intl. Airport (PHL) to Boulder, CO (WBU-Boulder Municipal) last-minute?
Holding off until just before your trip to book your flight from PHL to WBU often results in higher prices. While you may find some last-minute deals, there's no guarantee. Keep your travel plans flexible to maximize your chances of landing a bargain.
Is it cheaper to book a PHL to WBU flight and hotel package?
Compared with arranging hotels and flights separately, booking a PHL to WBU flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one place will take the hassle out of travel planning. Just pick your flights and select from our extensive range of hotels, then customize your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Philadelphia Intl. Airport (PHL) to Boulder, CO (WBU-Boulder Municipal)?
Typically, you can cancel or modify your PHL to WBU flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you need more information, go to our Customer Service portal.

Travel information

Origin airport
Philadelphia Intl.
Destination airport
Boulder Municipal
Distance
1580 mi

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Philadelphia to Boulder Flights

The cheapest times to fly from Philadelphia to Boulder

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 Philadelphia to Boulder are during the month of . You can find some of the cheapest flights from Philadelphia to Boulder with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Philadelphia to Boulder

Sunday is one of the best days to book for cheap flights from Philadelphia to Boulder: 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 Philadelphia to Boulder

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 Philadelphia to Boulder in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Philadelphia to Boulder 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 Philadelphia to Boulder 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.

 

Philadelphia to Boulder Flights

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*Available to One Key members.