$121 Cheap Flights from Louisville (SDF) to Denver (DEN)

View $121 flight on Tue, May 20, 2025Opens in a new window

Popular airlines from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN)

Find available prices by choosing your travel dates.

Cheap Flights from Louisville to Denver (SDF-DEN)

Prices were available within the past 7 days and start at $121 for one-way flights and $261 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, May 24 - Tue, May 27
SDF
Louisville
DEN
Denver
$261 Roundtrip, found 1 day ago
$261
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, May 24 from Louisville to Denver, returning Tue, May 27, priced at $261 found 1 day ago
Southwest Airlines
Tue, Jun 24 - Tue, Jul 1
SDF
Louisville
DEN
Denver
$264 Roundtrip, found 1 day ago
$264
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Tue, Jun 24 from Louisville to Denver, returning Tue, Jul 1, priced at $264 found 1 day ago
Sun Country Airlines
Fri, Jun 27 - Fri, Jul 4
SDF
Louisville
DEN
Denver
$277 Roundtrip, found 4 days ago
$277
Roundtrip
found 4 days ago
Select Sun Country Airlines flight, departing Fri, Jun 27 from Louisville to Denver, returning Fri, Jul 4, priced at $277 found 4 days ago
American Airlines
Tue, May 20 - Sat, May 24
SDF
Louisville
DEN
Denver
$279 Roundtrip, found 2 hours ago
$279
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Tue, May 20 from Louisville to Denver, returning Sat, May 24, priced at $279 found 2 hours ago
American Airlines
Mon, Jun 30 - Sat, Jul 5
SDF
Louisville
DEN
Denver
$284 Roundtrip, found 7 hours ago
$284
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Mon, Jun 30 from Louisville to Denver, returning Sat, Jul 5, priced at $284 found 7 hours ago
Sun Country Airlines
Mon, Jun 30 - Fri, Jul 4
SDF
Louisville
DEN
Denver
$287 Roundtrip, found 6 days ago
$287
Roundtrip
found 6 days ago
Select Sun Country Airlines flight, departing Mon, Jun 30 from Louisville to Denver, returning Fri, Jul 4, priced at $287 found 6 days ago
American Airlines
Mon, Jun 30 - Sat, Jul 5
SDF
Louisville
DEN
Denver
$288 Roundtrip, found 7 hours ago
$288
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Mon, Jun 30 from Louisville to Denver, returning Sat, Jul 5, priced at $288 found 7 hours ago
Southwest Airlines
Tue, Jun 10 - Tue, Jul 1
SDF
Louisville
DEN
Denver
$290 Roundtrip, found 1 day ago
$290
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Tue, Jun 10 from Louisville to Denver, returning Tue, Jul 1, priced at $290 found 1 day ago
United
Wed, May 21 - Mon, May 26
SDF
Louisville
DEN
Denver
$296 Roundtrip, found 4 hours ago
$296
Roundtrip
found 4 hours ago
Select United flight, departing Wed, May 21 from Louisville to Denver, returning Mon, May 26, priced at $296 found 4 hours ago
Delta
Thu, Jul 10 - Tue, Jul 15
SDF
Louisville
DEN
Denver
$312 Roundtrip, found 2 hours ago
$312
Roundtrip
found 2 hours ago
Select Delta flight, departing Thu, Jul 10 from Louisville to Denver, returning Tue, Jul 15, priced at $312 found 2 hours ago
Flights from Louisville (SDF) to Denver (DEN)
Origin airport
Louisville Intl.
Destination airport
Denver Intl.
Airlines serving
American Airlines, Delta, Southwest Airlines, United
Roundtrip price
$261
Distance
1020 mi

Louisville to Denver Flights

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

The best time to book a flight from Louisville to Denver

Sunday is one of the best days to book for cheap flights from Louisville 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 Louisville 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 Louisville to Denver in 2025. You can also book with separate airlines for your outbound and return journeys, from $121 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 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 Louisville 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 Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN) cost?
You can find affordable return tickets from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN) starting at $307. Grab a seat and get ready to go. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines flight leaving SDF on May 13 2025 and touching down at DEN. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from SDF to DEN?
The cheapest flights from SDF 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.
Which airlines fly direct from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN)?
When heading out of Louisville Intl. Airport (SDF), you can catch a direct flight to Denver Intl. Airport (DEN) with United Airlines.
What is the cheapest airline that flies from SDF to DEN?
Currently, the cheapest carrier offering one-way flights from SDF to DEN is United. You can jet off on this route from $154. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SDF on June 11 2025. Prices were last updated on April 24 2025 and have not changed since.
How many flights per day from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN)?
When flying out of Louisville Intl. Airport (SDF), you’ll have your pick from an average of 2 daily nonstop flights to Denver Intl. Airport (DEN).
What are the most popular departure times for flights from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN)?
Flights between SDF and DEN are busiest at 9 AM. If you’d like a more relaxed experience and potentially cheaper tickets, look for a time when demand is lower.
What day of the week has the most flights from SDF to DEN?
Friday has the most flights from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN). Consider taking off on this day and you’ll have a greater chance of finding a departure that fits your plans.
What is the earliest flight from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN)?
Louisville Intl. Airport (SDF)’s earliest flight to Denver Intl. Airport (DEN) is at approximately 6:35AM UTC-5. With a total journey time of 3h 10m, you’ll touch down at around 7:45AM UTC-7.
How long does it take to fly from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN)?
Flights from SDF to DEN have an average travel time of 3 hours and 11 minutes. The total distance between these two airports is 1,000 mi.
What is the best time to fly from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN)?
Opt for a flight from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this hour 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 Denver from Louisville Intl. Airport (SDF)?
Browse your flight options from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN). This is the only Denver airport you can jet into if you’re taking a direct flight.
Is it cheaper to buy a plane ticket from Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN) last-minute?
Holding off until just before your departure to book a ticket from SDF to DEN generally means paying more. Although you may find some last-minute offers, there’s no guarantee. Keep your travel schedule open to maximize your chances of landing a bargain.
Is it cheaper to book a SDF to DEN flight and hotel package?
Opting for a SDF to DEN flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Choose from our extensive range of accommodations and then add flights, car rentals and activities 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 Louisville Intl. Airport (SDF) to Denver Intl. Airport (DEN)?
If you reserved your SDF to DEN flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond 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.

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*Available to One Key members.