Cheap Flights from San Diego (SAN) to Boulder (WBU)

Popular airlines from San Diego Intl. Airport (SAN) to Boulder, CO (WBU-Boulder Municipal)

Frequently asked questions

How much does a flight from San Diego Intl. Airport (SAN) to Boulder, CO (WBU-Boulder Municipal) cost?
Lock in a cheap one-way flight or cheap return flight from San Diego Intl. Airport (SAN) to Boulder, CO (WBU-Boulder Municipal) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from San Diego Intl. Airport (SAN) to Boulder, CO (WBU-Boulder Municipal)?
The cheapest month to fly from SAN to WBU is , when there's less demand. Off-peak months are often when airlines offer lower prices between these airports.
What is the cheapest airline that flies from San Diego Intl. Airport (SAN) to Boulder, CO (WBU-Boulder Municipal)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SAN to WBU flight.
How many flights per day from San Diego Intl. Airport (SAN) to Boulder, CO (WBU-Boulder Municipal)?
Direct flights from San Diego Intl. Airport (SAN) to Boulder, CO (WBU-Boulder Municipal) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SAN to WBU?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can change based on a number of factors, such as the carrier 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 San Diego Intl. Airport (SAN) to Boulder, CO (WBU-Boulder Municipal)?
Opt for a flight from San Diego Intl. Airport (SAN) to Boulder, CO (WBU-Boulder Municipal) that takes off before 3 PM to reduce the likelihood of delays. 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.
What airports do you fly into for Boulder from San Diego Intl. Airport (SAN)?
Denver Intl. Airport (DEN) is the only airport in Boulder with direct flights from San Diego Intl. Airport (SAN). Browse your options and find cheap fares on Expedia.
Is it cheaper to buy a plane ticket from San Diego Intl. Airport (SAN) to Boulder, CO (WBU-Boulder Municipal) last-minute?
Last-minute bookings from SAN to WBU are typically more expensive. To secure the lowest prices, start searching for flights well ahead of time. That said, if your travel plans are flexible, you may score a cheap ticket right before your trip.
Is it cheaper to book a SAN to WBU flight and hotel package?
Securing a SAN to WBU flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Choose from our impressive range of hotels and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Diego Intl. Airport (SAN) to Boulder, CO (WBU-Boulder Municipal)?
If you reserved your SAN to WBU flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

Travel information

Travel information

Origin airport
San Diego Intl.
Destination airport
Boulder Municipal
Distance
834 mi

Book with confidence

Book with confidence

San Diego to Boulder Flights

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

 

The best time to book a flight from San Diego to Boulder

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

 

San Diego to Boulder Flights

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Explore a world of travel with Expedia

*Available to One Key members.