Cheap Flights from Louisville (SDF) to Boulder (WBU)

Popular airlines from Louisville Intl. Airport (SDF) to Boulder, CO (WBU-Boulder Municipal)

Frequently asked questions

How much does a flight from Louisville Intl. Airport (SDF) to Boulder, CO (WBU-Boulder Municipal) cost?
Grab a cheap one-way flight or cheap return flight from Louisville Intl. Airport (SDF) 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 Louisville Intl. Airport (SDF) to Boulder, CO (WBU-Boulder Municipal)?
The cheapest month to fly from SDF to WBU is , when demand is low. Off-peak months are usually when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Louisville Intl. Airport (SDF) to Boulder, CO (WBU-Boulder Municipal)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll fly you from SDF to WBU. Then, sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Louisville Intl. Airport (SDF) to Boulder, CO (WBU-Boulder Municipal)?
There are no daily nonstop flights from Louisville Intl. Airport (SDF) to Boulder, CO (WBU-Boulder Municipal). But you can opt for flights with layovers. Filter your search results 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 SDF to WBU?
Friday is usually 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 time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Louisville Intl. Airport (SDF) to Boulder, CO (WBU-Boulder Municipal)?
To reach Boulder, CO (WBU-Boulder Municipal) on schedule, book a flight that takes off from Louisville Intl. Airport (SDF) 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 Louisville Intl. Airport (SDF)?
If you've booked a direct flight from Louisville Intl. Airport (SDF) to Boulder, Denver Intl. Airport (DEN) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Louisville Intl. Airport (SDF) to Boulder, CO (WBU-Boulder Municipal) last-minute?
Holding off until right before your break to book a flight from SDF to WBU generally means paying more. Although you may find some last-minute deals, there's no guarantee. Be flexible with your itinerary to boost your chances of landing a bargain.
Is it cheaper to book a SDF to WBU flight and hotel package?
You'll generally save money by booking a SDF to WBU flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. Once you've chosen your preferred flights and accommodations, consider adding extras including car rentals, tours and activities.
Can I cancel or change the date of my flight from Louisville Intl. Airport (SDF) to Boulder, CO (WBU-Boulder Municipal)?
If you booked your SDF to WBU flight within the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of ticket 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, go to our Customer Service portal for more information.

Travel information

Origin airport
Louisville Intl.
Destination airport
Boulder Municipal
Distance
1050 mi

Book with confidence

Louisville to Boulder Flights

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

 

The best time to book a flight from Louisville to Boulder

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

 

Louisville to Boulder Flights

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*Available to One Key members.