HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Louisville

$109+ Cheap flights from Denver to Louisville (DEN - SDF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SDF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Louisville with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Denver Intl to Louisville Intl are usually found in August or March, booked 34 days in advance, depart on a Saturday or Tuesday and return on a Tuesday

Cheap flight deals from Denver to Louisville

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Louisville (SDF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.

Round-trip from

$217
(Southwest)

One-way from

$109
(United Airlines)

Popular in

April

Cheapest in

August

Average price

$474

Good round-trip deal

$403 or less

Good one-way deal

$188 or less
From Denver Intl to Louisville Intl
Search Deals
One-way flight from Denver Intl to Louisville Intl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals
Price to beat on a round-trip flight from Denver Intl to Louisville Intl.
Search Deals
Price to beat on a one-way flight from Denver Intl to Louisville Intl.
Search Deals

Find flight deals from Denver to Louisville

Cheapest flights from Denver to Louisville
Explore the most affordable flight options available from Denver to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/295:51 pmDEN - SDF
Nonstop2h 39mUnited Airlines
Thu 10/308:00 amSDF - DEN
Nonstop3h 08mUnited Airlines
Deal found 6/11$217
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/297:50 amDEN - SDF
2 stops7h 40mSouthwest
Thu 10/304:35 pmSDF - DEN
Nonstop2h 55mSouthwest
Deal found 6/11$232
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/612:55 amDEN - SDF
1 stop6h 54mDelta
Mon 8/117:45 pmSDF - DEN
1 stop6h 30mDelta
Deal found 6/11$237
This American Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1612:41 pmDEN - SDF
1 stop5h 22mAmerican Airlines
Mon 9/222:50 pmSDF - DEN
1 stop8h 11mAmerican Airlines
Deal found 6/12$292
This Sun Country Air deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/36:13 pmDEN - SDF
1 stop20h 30mSun Country Air
Mon 7/72:10 pmSDF - DEN
1 stop23h 19mSun Country Air
Deal found 6/10$305
This Mytrip deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/36:13 pmDEN - SDF
1 stop20h 30mMultiple Airlines
Sat 7/54:17 pmSDF - DEN
3 stops27h 55mMultiple Airlines
Deal found 6/10$391
This Mytrip deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/128:06 amDEN - SDF
2 stops28h 14mAllegiant Air
Thu 7/175:43 pmSDF - DEN
2 stops15h 27mAllegiant Air
Deal found 6/10$459

Cheapflights Fare Finder

Customize your flight search to find flights from Denver to Louisville that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from Denver to Louisville that are best for you.

Fly from

Denver

Fly to

Louisville

Route

Depart

Return

Price

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Thu 8/7

7:05 pm-11:40 pm

Nonstop2h 35m

Louisville Intl

Mon 8/11

6:00 am-6:50 am

Nonstop2h 50m

$217

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Wed 8/6

12:55 am-9:49 am

1 stop6h 54m

Louisville Intl

Mon 8/11

7:45 pm-12:15 am

1 stop6h 30m

$237

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Wed 8/6

5:58 pm-10:45 pm

Nonstop2h 47m

Louisville Intl

Wed 9/10

9:31 am-10:30 am

Nonstop2h 59m

$297

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Thu 7/3

6:13 pm-4:43 pm

1 stop20h 30m

Louisville Intl

Mon 7/7

2:10 pm-11:29 am

1 stop23h 19m

$305

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Fri 8/1

1:49 pm-12:30 am

1 stop8h 41m

Louisville Intl

Mon 8/4

8:40 pm-11:44 pm

1 stop5h 04m

$317

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Thu 7/3

6:13 pm-4:43 pm

1 stop20h 30m

Louisville Intl

Sat 7/5

4:17 pm-6:12 pm

3 stops27h 55m

$391

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Sat 7/12

8:06 am-2:20 pm

2 stops28h 14m

Louisville Intl

Thu 7/17

5:43 pm-7:10 am

2 stops15h 27m

$459

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Thu 8/21

9:55 am-2:34 pm

Nonstop2h 39m

$109

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Mon 8/18

5:25 am-12:20 pm

1 stop4h 55m

$119

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Sat 9/6

6:00 am-2:26 pm

1 stop6h 26m

$134

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 14 results
1
2

Best time to book a flight from Denver to Louisville

Have a flexible travel schedule? Discover the best time to fly to Louisville from Denver with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Denver to Louisville

How far ahead should I book a flight from Denver to Louisville?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Louisville. Price data was last updated on June 9, 2025.

The price you pay for your flight from Denver to Louisville may vary depending on when you book. For the best chance of a lower fare, look to book 34 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Denver to Louisville?

Currently, January is the cheapest month in which you can book a flight from Denver to Louisville (average of $299). Flying from Denver to Louisville in April is currently the most expensive (average of $369). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from DEN to SDF?

Find hourly flight availability from Denver to Louisville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

It’s optimal to fly from Denver to Louisville in the evening. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight at noon.

Weekly flight availability from Denver to Louisville

Explore weekly flight availability from Denver to Louisville. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 12, 2025.

The most flights from DEN to SDF are scheduled on a Wednesday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Louisville by month

Plan your trip to Louisville by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Louisville ranges from 3.1 - 5.3 inches per month. May is typically the wettest month, when rainfall can reach 5.3 in. September is typically the driest time to visit Louisville when rainfall is around 3.1 in.

Temperature in Louisville by month

Plan your trip to Louisville by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Louisville, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Louisville

Get insights into the airlines that provide service to Louisville. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Louisville. Reviews last updated June 12, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta and United Airlines from Denver to Louisville to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Allegiant Air
7.3
Good
725 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

Find useful and relevant information for your journey from Denver to Louisville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Denver to Louisville?

    Louisville Intl is the airport most travelers will use when flying to Louisville from Denver Intl. Booking flights from Denver Intl (DEN) to Louisville Intl (SDF) should be relatively easy as there are 3 daily flights to Louisville from 4 different airlines. 2h 25m is how long a flight from Denver to Louisville Intl will take if you book a nonstop flight.

  • How popular is this Denver to Louisville flight route?

    The Denver Intl to Louisville Intl flight path was viewed by 3 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from Denver to Louisville round-trip?

    Cheapflights users have booked flights from Denver to Louisville round-trip from $217. Other airlines that can offer you cheap pricing are Delta, from $237, and United Airlines, from $297. Southwest is currently priced 52% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Denver to Louisville one-way?

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $109. Users have also found prices from $119 and $134 on Southwest and Delta, respectively.

  • What are the most reliable airlines from Denver to Louisville?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Denver to Louisville on time: United Airlines (71%), Air Canada (65%), Southwest (62%).

  • What are the cheapest flights from Denver to Louisville?

    The cheapest flight price from Denver to Louisville is $87. On average you can expect to pay $347. The most popular route, (Denver Intl - Louisville Intl), can usually be booked for $217.

  • Can I find deals for flights from Denver to Louisville that include hotel bookings?

    Yes. In addition to deals on Denver to Louisville flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to Louisville?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to Louisville.

  • Can I find deals for business class flights from Denver to Louisville?

    Yes. Cheapflights offers flight deals from Denver to Louisville by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Denver to Louisville?

    Currently, January is the cheapest month in which you can book a flight from Denver to Louisville (average of $299). Flying from Denver to Louisville in April is currently the most expensive (average of $369). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
Bardstown

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Denver to Louisville

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Nashville flights
Denver to Cincinnati flights
Denver to Knoxville flights
Denver to Lexington flights
Denver to Evansville flights
Colorado Springs to Cincinnati flights
Colorado Springs to Nashville flights
Denver to Blountville flights
Colorado Springs to Louisville flights
Grand Junction to Nashville flights
Colorado Springs to Knoxville flights
Colorado Springs to Blountville flights
Durango to Knoxville flights
Grand Junction to Knoxville flights
Gunnison to Nashville flights
Durango to Nashville flights
Montrose to Cincinnati flights
Vail to Cincinnati flights
Montrose to Knoxville flights
Aspen to Nashville flights
Colorado Springs to Evansville flights
Colorado Springs to Lexington flights
Grand Junction to Cincinnati flights
Hayden to Cincinnati flights
Denver to Huntington flights
Grand Junction to Louisville flights
Gunnison to Lexington flights
Gunnison to Knoxville flights
Montrose to Nashville flights
Vail to Louisville flights
Grand Junction to Blountville flights
Hayden to Louisville flights
Gunnison to Louisville flights
Durango to Lexington flights
Denver to Owensboro flights
Aspen to Knoxville flights

Top 4 airlines flying from Denver to Louisville

Discover the top 4 airlines that operate flights from Denver to Louisville. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$226Average$390FlexibilityNo cancel feeOn-time71%
DeltaCheapest$294Average$376FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$306Average$480FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$308Average$428FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.