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

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

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Flights from Phoenix (PHX) to Boulder (WBU)
Origin airport
Sky Harbor Intl.
Destination airport
Boulder Municipal
Distance
590 mi

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.

 

Frequently asked questions

Is it cheaper to buy a plane ticket from Sky Harbor Intl. Airport (PHX) to WBU last minute?
When it comes to booking your flights, being organized pays off. While it’s possible to score a last-minute deal on a Sky Harbor Intl. Airport (PHX) to WBU flight, prices usually don’t get cheaper as the departure date nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to book a domestic flight is between 28 – 35 days in advance. For international trips it’s between three and four months.
What airports do you fly into for Boulder from Phoenix?
With Boulder, CO (WBU-Boulder Municipal), Denver Intl. Airport (DEN) and Broomfield, CO (BJC-Rocky Mountain Metropolitan) to pick from, getting from Phoenix to Boulder is easy. The city’s major gateway, Boulder, CO (WBU-Boulder Municipal), is approximately 3 mi northeast of the center. Along with the price of fares, consider factors like transportation options from the airport and the distance to your hotel when choosing where to fly into. Get your Boulder vacation off to a superb start by exploring University of Colorado Boulder and Folsom Field.
Can I change the date of my flight from Phoenix Sky Harbor Intl. Airport to WBU?
Make changes quickly to your PHX to WBU journey via the Expedia Trips portal. Before making any amendments, read over the rules and restrictions in your itinerary to learn what you can do and if fees apply for changes. Some airlines have a change fee per person, on top of any difference in prices. However, if you booked in the last 24 hours, you may be able to cancel for free and organize new flights. You can also visit our Customer Service portal for more useful advice and to chat with our Virtual Agent.

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