Cheap Flights from Boulder (WBU) to Denver (DEN)

Popular airlines from Boulder, CO (WBU-Boulder Municipal) to Denver Intl. Airport (DEN)

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Flights from Boulder (WBU) to Denver (DEN)
Origin airport
Boulder Municipal
Destination airport
Denver Intl.
Distance
32 mi

Boulder to Denver Flights

The cheapest times to fly from Boulder to Denver

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

The best time to book a flight from Boulder to Denver

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

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 Boulder to Denver 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 Boulder to Denver 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 Boulder to Denver 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

How much does a flight from Boulder, CO (WBU-Boulder Municipal) to Denver Intl. Airport (DEN) cost?
Discover the latest flight deals from WBU to DEN by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from WBU to DEN?
The cheapest flights from WBU to DEN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from WBU to DEN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from WBU to DEN. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Boulder, CO (WBU-Boulder Municipal) to Denver Intl. Airport (DEN)?
There aren’t any daily direct flights available from Boulder, CO (WBU-Boulder Municipal) to Denver Intl. Airport (DEN). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you’ll be cruising above the clouds in no time.
What day of the week has the most flights from WBU to DEN?
Generally you’ll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change based on the time of year, 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 Boulder, CO (WBU-Boulder Municipal) to Denver Intl. Airport (DEN)?
Choose a flight from Boulder, CO (WBU-Boulder Municipal) to Denver Intl. Airport (DEN) that takes off before 3 PM to reduce the risk of cancellations. Later departures are on average 22% more likely to be 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.
Is it cheaper to buy a plane ticket from Boulder, CO (WBU-Boulder Municipal) to Denver Intl. Airport (DEN) last-minute?
Booking your plane ticket from WBU to DEN shortly before your trip is usually more expensive. However, if there’s some wiggle room with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a WBU to DEN flight and hotel package?
Compared with arranging hotels and flights separately, booking a WBU to DEN flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place takes the hassle out of planning your trip. Just secure your flights and select from our wide range of hotels, then personalize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Boulder, CO (WBU-Boulder Municipal) to Denver Intl. Airport (DEN)?
Typically, you’re able to cancel or reschedule your WBU to DEN flight. However, additional charges may apply, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline’s fees and policies on flight changes, or if you need more details, go to our Customer Service portal.

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*Available to One Key members.