Cheap Flights from Phoenix (PHX) to Boulder (WBU)

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Boulder, CO (WBU-Boulder Municipal)

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Boulder, CO (WBU-Boulder Municipal) cost?
Lock in a cheap one-way flight or cheap return flight from Sky Harbor Intl. Airport (PHX) to Boulder, CO (WBU-Boulder Municipal) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Sky Harbor Intl. Airport (PHX) to Boulder, CO (WBU-Boulder Municipal)?
Planning your getaway for may help you find better deals, as it's the cheapest month for flights between PHX and WBU. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Sky Harbor Intl. Airport (PHX) to Boulder, CO (WBU-Boulder Municipal)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest PHX to WBU flight.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Boulder, CO (WBU-Boulder Municipal)?
You'll have to hop on a flight with a layover when traveling from Sky Harbor Intl. Airport (PHX) to Boulder, CO (WBU-Boulder Municipal). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from PHX to WBU?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary depending on a range of factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Boulder, CO (WBU-Boulder Municipal)?
To touch down at Boulder, CO (WBU-Boulder Municipal) without delays, pick a flight that takes off from Sky Harbor Intl. Airport (PHX) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Sky Harbor Intl. Airport (PHX)?
Denver Intl. Airport (DEN) is the only airport in Boulder with direct flights from Sky Harbor Intl. Airport (PHX). Compare your options and find cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Sky Harbor Intl. Airport (PHX) to Boulder, CO (WBU-Boulder Municipal) last-minute?
Holding off until just before your departure to book a ticket from PHX to WBU often results in higher prices. While it's possible to find some last-minute discounts, they're not always guaranteed. Be flexible with your travel plans for a better chance of landing a bargain.
Is it cheaper to book a PHX to WBU flight and hotel package?
You'll generally save money by booking a PHX to WBU flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After selecting your ideal accommodations and flights, consider other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Boulder, CO (WBU-Boulder Municipal)?
Typically, it's possible to reschedule or cancel your PHX to WBU flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Sky Harbor Intl.
Destination airport
Boulder Municipal
Distance
590 mi

Book with confidence

Phoenix to Boulder Flights

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

 

The best time to book a flight from Phoenix to Boulder

Sunday is one of the best days to book for cheap flights from Phoenix 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 Phoenix 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 Phoenix 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 Phoenix 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 Phoenix 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.

 

Phoenix to Boulder Flights

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*Available to One Key members.