$139 Cheap United flights Denver (DEN) to Louisville (SDF)

View $139 flight on Thu, Sep 11, 2025Opens in a new window

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$139 Cheap United flights Denver (DEN) to Louisville (SDF)

Prices were available within the past 7 days and start at $139 for one-way flights and $270 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Oct 11 - Sat, Oct 18
DEN
Denver
SDF
Louisville
$270 Roundtrip, found 4 hours ago
$270
Roundtrip
found 4 hours ago
Select United flight, departing Sat, Oct 11 from Denver to Louisville, returning Sat, Oct 18, priced at $270 found 4 hours ago
United
Thu, Sep 11 - Tue, Sep 16
DEN
Denver
SDF
Louisville
$277 Roundtrip, found 1 hour ago
$277
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 11 from Denver to Louisville, returning Tue, Sep 16, priced at $277 found 1 hour ago
United
Sat, Aug 23 - Wed, Aug 27
DEN
Denver
SDF
Louisville
$282 Roundtrip, found 1 day ago
$282
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 23 from Denver to Louisville, returning Wed, Aug 27, priced at $282 found 1 day ago
United
Fri, Oct 24 - Mon, Oct 27
DEN
Denver
SDF
Louisville
$284 Roundtrip, found 1 hour ago
$284
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Oct 24 from Denver to Louisville, returning Mon, Oct 27, priced at $284 found 1 hour ago
United
Fri, Oct 24 - Mon, Oct 27
DEN
Denver
SDF
Louisville
$294 Roundtrip, found 1 hour ago
$294
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Oct 24 from Denver to Louisville, returning Mon, Oct 27, priced at $294 found 1 hour ago
United
Sun, Aug 31 - Thu, Sep 4
DEN
Denver
SDF
Louisville
$296 Roundtrip, found 2 hours ago
$296
Roundtrip
found 2 hours ago
Select United flight, departing Sun, Aug 31 from Denver to Louisville, returning Thu, Sep 4, priced at $296 found 2 hours ago
Flights from Denver (DEN) to Louisville (SDF)
Origin airport
Denver Intl.
Destination airport
Louisville Intl.
Airlines serving
American Airlines, Delta, Southwest Airlines, United
Popular airline
American Airlines
Distance
1020 mi
Average flight time
5 hours 5 mins

Frequently asked questions

How much is a United Airlines flight from Denver Intl. Airport (DEN) to Louisville Intl. Airport (SDF)?
Apply the "Price (lowest to highest)" filter on Expedia to search for cheap United Airlines round-trip flights from $270 from DEN to SDF. Affordable one-way tickets from $139 are also on offer.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from DEN to SDF with United Airlines?
January is one of the least expensive months to jet off to Louisville with United Airlines. You could also find fantastic deals on return and one-way tickets in December.
What is the cheapest time to book flights from Denver Intl. Airport (DEN) to Louisville Intl. Airport (SDF) with United Airlines?
To find cheap United Airlines fares from Denver Intl. Airport (DEN) to Louisville Intl. Airport (SDF), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect the overall price. Sunday is typically the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Denver Intl. Airport (DEN) to Louisville Intl. Airport (SDF)?
Hop on one of United Airlines's 11 weekly direct flights from Denver Intl. Airport (DEN) to Louisville Intl. Airport (SDF). To see your options, enter your dates, origin and destination and hit search. Then select the "Nonstop" and "Airline" filters.
How long does it take to fly from DEN to SDF with United Airlines?
It takes around 2h 36m to fly nonstop from Denver Intl. Airport (DEN) to Louisville Intl. Airport (SDF) with United Airlines.
Which day of the week has the most United Airlines flights from Denver Intl. Airport (DEN) to Louisville Intl. Airport (SDF)?
If it's flexibility you're after, Saturday offers the most choice for United Airlines flights from Denver Intl. Airport (DEN) to Louisville Intl. Airport (SDF). You can pick from 2 different departures.
What is the earliest United Airlines flight from DEN to SDF?
The first United Airlines flight from DEN to SDF takes off at 9:45AM UTC-7, arriving at 2:26PM UTC-5. If you prefer to head off later, the last United Airlines flight leaves DEN at 5:37PM UTC-7 and lands at SDF at 10:12PM UTC-5. Flying early is often a wise choice as morning and mid-morning flights tend to experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Louisville?
Get on a United Airlines flight from Denver Intl. Airport (DEN) to Louisville, and you're most likely to land at Louisville Intl. Airport (SDF). This is the airline's main hub in this destination.
Why fly with United Airlines from DEN to SDF?
A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to fly from DEN to SDF with United Airlines. Plus, when you sign up to our One Key™ program, you can earn OneKeyCash™* on top of any airline loyalty program earnings. It's yours to spend on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Denver Intl. Airport (DEN) to Louisville Intl. Airport (SDF)?
You'll most likely travel on an Airbus A319 for your United Airlines flight from Denver Intl. Airport (DEN) to Louisville Intl. Airport (SDF). However, you may end up on another aircraft for operational reasons.
Can I change or cancel my United Airlines flight from Denver Intl. Airport (DEN) to Louisville Intl. Airport (SDF)?
Depending on your ticket type, a fee generally applies if you modify or cancel your flight more than 24 hours after it has been confirmed. To secure plane tickets with more flexibility, select our "Changes included" or "No cancel fee" filter when you look for flights. For more details on changing or canceling your reservation, go to "Trips," select your flight and tick "Manage Booking."

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