$143 Cheap Flights from Denver (DEN) to Louisville (SDF)

View $143 flight on Tue, Apr 28, 2026Opens in a new window

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

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Cheap Flights from Denver to Louisville (DEN-SDF)

Prices were available within the past 7 days and start at $143 for one-way flights and $286 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Tue, May 5 - Wed, May 6
DEN
Denver
SDF
Louisville
$286 Roundtrip, found 1 day ago
$286
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Tue, May 5 from Denver to Louisville, returning Wed, May 6, priced at $286 found 1 day ago
Southwest Airlines
Mon, Apr 27 - Tue, Apr 28
DEN
Denver
SDF
Louisville
$295 Roundtrip, found 1 hour ago
$295
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Mon, Apr 27 from Denver to Louisville, returning Tue, Apr 28, priced at $295 found 1 hour ago
United
Wed, Apr 22 - Wed, Apr 29
DEN
Denver
SDF
Louisville
$297 Roundtrip, just found
$297
Roundtrip
just found
Select United flight, departing Wed, Apr 22 from Denver to Louisville, returning Wed, Apr 29, priced at $297 just found
Southwest Airlines
Tue, May 12 - Tue, May 19
DEN
Denver
SDF
Louisville
$301 Roundtrip, found 2 hours ago
$301
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Tue, May 12 from Denver to Louisville, returning Tue, May 19, priced at $301 found 2 hours ago
Southwest Airlines
Mon, Apr 27 - Tue, Apr 28
DEN
Denver
SDF
Louisville
$305 Roundtrip, found 1 hour ago
$305
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Mon, Apr 27 from Denver to Louisville, returning Tue, Apr 28, priced at $305 found 1 hour ago
United
Mon, Apr 27 - Tue, Apr 28
DEN
Denver
SDF
Louisville
$306 Roundtrip, found 1 hour ago
$306
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Apr 27 from Denver to Louisville, returning Tue, Apr 28, priced at $306 found 1 hour ago
United
Wed, Apr 22 - Wed, Apr 29
DEN
Denver
SDF
Louisville
$307 Roundtrip, just found
$307
Roundtrip
just found
Select United flight, departing Wed, Apr 22 from Denver to Louisville, returning Wed, Apr 29, priced at $307 just found
Southwest Airlines
Mon, May 18 - Wed, May 27
DEN
Denver
SDF
Louisville
$310 Roundtrip, found 2 hours ago
$310
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Mon, May 18 from Denver to Louisville, returning Wed, May 27, priced at $310 found 2 hours ago
American Airlines
Wed, Apr 22 - Wed, Apr 29
DEN
Denver
SDF
Louisville
$317 Roundtrip, just found
$317
Roundtrip
just found
Select American Airlines flight, departing Wed, Apr 22 from Denver to Louisville, returning Wed, Apr 29, priced at $317 just found
Delta
Wed, Apr 22 - Wed, Apr 29
DEN
Denver
SDF
Louisville
$317 Roundtrip, just found
$317
Roundtrip
just found
Select Delta flight, departing Wed, Apr 22 from Denver to Louisville, returning Wed, Apr 29, priced at $317 just found

Alternative airports near Louisville

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Louisville Intl. SDF. Cheapest and Closest option available. Average driving time to city center is 9 minutes. Flights from $433
SDF
Louisville Intl.
CheapestClosest
Average driving time to city center9 min
Flights from $433

Find the cheapest month to fly from Denver (DEN) to Louisville (SDF)

September is typically the cheapest month to fly

From $146 - $447 per traveler.

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.) cost?
You can find cheap one-way flights from $143 and cheap return flights from $286 Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.) with Expedia. One-way flights usually range from $184 to $730, and return flights typically cost between $374 and $1112. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
August is the cheapest month to fly from Denver, CO (DEN) to Louisville, KY (SDF), with average round-trip fares around $386. This price is about 11% lower than the average for the year, as demand tends to dip during the late summer. Other economical months to fly include June and September.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
You can fly direct from DEN to SDF on United, with around 27 flights per week.
What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
Southwest Airlines is one of the cheapest airlines offering nonstop flights from Denver Intl. (DEN) to Louisville Intl. (SDF), with round-trip tickets starting from around $156. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
The best airline to fly with from Denver, CO (DEN) to Louisville, KY (SDF) will differ from traveler to traveler. If you like to fly early, United offers early morning flights. If price is the most important factor, United typically offers the lowest fares. WN offers the most daily flights from Denver to Louisville, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
The best time to fly from Denver to Louisville is typically in June or August. June offers a moderate average price of around $386 for a return flight, while August is also a cost-effective option. These months strike a balance between affordability and favorable travel conditions, making them ideal for your trip.*Prices based on flights available on Expedia in the last year.
How many flights per day from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
On average, there are around 5 nonstop flights per day from Denver Intl. (DEN) to Louisville Intl. (SDF). For more options, look at flights that include layovers.
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
The earliest flight from Denver International Airport (DEN) to Louisville International Airport (SDF) typically departs at around 12:20 AM, operated by American Airlines. This seasonal service can help you get an early start on your day in Louisville. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
The most popular departure times for flights from Denver, CO (DEN) to Louisville, KY (SDF) are in the late morning, from 9am to noon. This accounts for around 31% of total traffic. Major carriers like United, American Airlines and Southwest Airlines offer flights during this window. Many travelers prefer this time because it allows for a relaxed start to the day before heading to the airport.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
A nonstop flight from DEN to SDF typically takes around 2 hours 50 minutes, covering approximately 1,021 miles. Connecting flights on this route usually add 3 hours 40 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
First class seats are offered on the DEN to SDF route. First class cabins are available on:

  • American Airlines
  • Delta Air Lines
  • United Airlines

How much is a business class flight from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
A direct, return business class ticket from Denver (DEN) to Louisville (SDF) typically costs between $969 - $1,617. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Louisville from Denver Intl. (DEN)?
From Denver Intl. (DEN), you can fly into Louisville Intl. (SDF) to reach Louisville. Some flights may connect through major hubs like Love Field (DAL), Eppley Field (OMA), Kansas City Intl. (MCI) before reaching Louisville. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.) Louisville Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.)?
If you booked your Denver, CO (DEN-Denver Intl.) to Louisville, KY (SDF-Louisville Intl.) 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 ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Denver Intl.
Destination airport
Louisville Intl.
Airlines serving
American Airlines, Delta, Southwest Airlines, United
Roundtrip price
$286
Distance
1020 mi
Average flight time
4 hours 32 mins

Book with confidence

Denver to Louisville Flights

The cheapest times to fly from Denver to Louisville

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

 

The best time to book a flight from Denver to Louisville

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

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 Denver to Louisville in 2026. You can also book with separate airlines for your outbound and return journeys, from $143 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 Denver to Louisville 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 Denver to Louisville 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.

 

Denver to Louisville Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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