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$135+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SDF
Aug 28 — Sep 41
Fri 8/28
Fri 9/4
1 adult, Economy
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Find cheap flights from Denver to Louisville with Cheapflights

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Cheapflights Tip: The best prices from Denver Intl to Louisville Intl are usually found in October or August, booked 36 days in advance, depart on a Saturday or Thursday and return on a Wednesday

Cheap 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 July 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:10 pm
DEN
-
SDF
2 stops23h 21m
Multiple Airlines
Sat 10/39:14 pm
SDF
-
DEN
1 stop15h 11m
Multiple Airlines
Deal found 7/26$287
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/47:34 pm
DEN
-
SDF
1 stop16h 59m
Allegiant Air
Wed 10/71:35 pm
SDF
-
DEN
1 stop21h 55m
Allegiant Air
Deal found 7/26$298
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3011:46 am
DEN
-
SDF
1 stop6h 45m
Multiple Airlines
Sat 10/39:14 pm
SDF
-
DEN
1 stop15h 11m
Multiple Airlines
Deal found 7/26$309
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:38 am
DEN
-
SDF
2 stops45h 07m
Multiple Airlines
Wed 10/71:35 pm
SDF
-
DEN
1 stop21h 55m
Multiple Airlines
Deal found 7/26$310
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:10 pm
DEN
-
SDF
2 stops23h 21m
Multiple Airlines
Wed 10/71:35 pm
SDF
-
DEN
1 stop21h 55m
Multiple Airlines
Deal found 7/26$316
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:31 am
DEN
-
SDF
2 stops31h 44m
Multiple Airlines
Wed 8/262:56 pm
SDF
-
DEN
1 stop8h 53m
Multiple Airlines
Deal found 7/26$320
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/47:34 pm
DEN
-
SDF
1 stop16h 59m
Multiple Airlines
Tue 10/64:56 pm
SDF
-
DEN
1 stop16h 56m
Multiple Airlines
Deal found 7/26$325
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:45 am
DEN
-
SDF
2 stops21h 00m
Multiple Airlines
Sun 9/209:09 pm
SDF
-
DEN
1 stop12h 59m
Multiple Airlines
Deal found 7/28$329
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:21 am
DEN
-
SDF
1 stop7h 08m
Multiple Airlines
Mon 10/57:21 pm
SDF
-
DEN
2 stops38h 44m
Multiple Airlines
Deal found 7/28$334
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:30 am
DEN
-
SDF
2 stops26h 29m
Multiple Airlines
Wed 10/71:35 pm
SDF
-
DEN
1 stop21h 55m
Multiple Airlines
Deal found 7/26$336
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Tue 10/135:48 pm
DEN
-
SDF
Nonstop2h 44m
United Airlines
Thu 10/153:36 pm
SDF
-
DEN
Nonstop2h 59m
United Airlines
Deal found 7/28$337
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:10 pm
DEN
-
SDF
2 stops23h 21m
Multiple Airlines
Tue 10/64:56 pm
SDF
-
DEN
1 stop16h 56m
Multiple Airlines
Deal found 7/26$343

Find 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 July 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$287
(Kiwi.com)

One-way from

$135
(Kiwi.com)

Popular in

July

Cheapest in

October

Average price

$568

Good round-trip deal

$380 or less

Good one-way deal

$259 or less
Provider with most accurate pricing for Denver Intl-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Louisville Intl flights.
Search Deals
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. 4% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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

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 July 29, 2026.
Use the filters below to find and compare flights from Denver to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Wed 9/16

5:30 am-1:08 pm

1 stop5h 38m

Louisville Intl

Tue 9/22

5:15 am-8:47 am

1 stop5h 32m

$357

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Fri 10/16

5:55 am-2:55 pm

1 stop7h 00m

Louisville Intl

Mon 10/19

3:35 pm-6:25 pm

1 stop4h 50m

$404

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Sun 12/20

12:20 am-9:55 am

1 stop7h 35m

Louisville Intl

Tue 12/29

7:30 pm-12:24 am

1 stop6h 54m

$427
Quickest round-trip

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Tue 8/25

9:45 am-2:29 pm

Nonstop2h 44m

Louisville Intl

Sat 8/29

8:00 am-8:55 am

Nonstop2h 55m

$427

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Sat 8/29

9:45 am-2:29 pm

Nonstop2h 44m

Louisville Intl

Mon 8/31

3:25 pm-4:26 pm

Nonstop3h 01m

$427

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Wed 11/25

7:45 am-4:57 pm

1 stop7h 12m

Louisville Intl

Fri 11/27

8:00 am-9:04 am

Nonstop3h 04m

$464

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Wed 9/16

5:30 am-1:08 pm

1 stop5h 38m

Louisville Intl

Mon 9/21

3:25 pm-4:26 pm

Nonstop3h 01m

$473

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Thu 8/13

11:05 am-7:11 pm

1 stop6h 06m

Louisville Intl

Mon 8/17

7:54 pm-11:34 pm

1 stop5h 40m

$478

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Fri 9/4

11:05 am-8:35 pm

2 stops7h 30m

Louisville Intl

Mon 9/7

7:55 am-10:35 am

1 stop4h 40m

$479

DenverLouisville

DEN - SDF

DENSDF

Denver Intl

Thu 10/8

5:48 pm-10:32 pm

Nonstop2h 44m

Louisville Intl

Mon 10/12

8:00 am-8:55 am

Nonstop2h 55m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Denver to Louisville

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Louisville in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Louisville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Louisville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Louisville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Louisville flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Louisville flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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?

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 35 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, October is the cheapest month in which you can book a flight from Denver to Louisville (average of $377). Flying from Denver to Louisville in July is currently the most expensive (average of $568). 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 July 29, 2026.

It’s optimal to fly from Denver to Louisville in the evening. By choosing this option you can save up to 22% on the cost of your flight, compared to a flight at noon.

How much does it cost to fly round-trip from Denver to Louisville?

Airfare is below average for this route at the moment.

Denver to Louisville flights typically cost between $343 and $493 in September.
The cheapest round-trip price found within the last 5 days was $287 on Multiple Airlines (Sep 29-Oct 3).

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 July 29, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Denver to Louisville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,228 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
Southwest
8.0
Very good
4,228 reviews
Southwest
8.0
Very good
4,228 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
Delta
7.8
Good
8,486 reviews
Southwest
8.0
Very good
4,228 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
United Airlines
7.4
Good
10,052 reviews
Southwest
8.0
Very good
4,228 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
American Airlines
7.1
Good
11,839 reviews
Southwest
8.0
Very good
4,228 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.

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 20 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Denver to Louisville?

    Departing from Denver to Louisville will take you 5h 38m. Airlines will cover a distance of 1021 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Cheapflights users have booked flights from Denver to Louisville round-trip from $149. Other airlines that can offer you cheap pricing are American Airlines, from $272, and United Airlines, from $282. Delta is currently priced 68% 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 Delta. According to our data, you can fly for as low as $98. Users have also found prices from $148 and $173 on Southwest and United Airlines, 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: Air Canada (78%), Southwest (72%), United Airlines (68%).

  • What are the cheapest flights from Denver to Louisville?

    The cheapest flight price from Denver to Louisville is $186. On average you can expect to pay $500. The most popular route, (Denver Intl - Louisville Intl), can usually be booked for $337.

  • 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, October is the cheapest month in which you can book a flight from Denver to Louisville (average of $377). Flying from Denver to Louisville in July is currently the most expensive (average of $568). 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 Louisville?

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

Browse thousands of different options on Cheapflights for your next trip

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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 July 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$149Average$398FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$272Average$456FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$282Average$497FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$297Average$480FlexibilityNo cancel feeOn-time63%

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