$111 Cheap flight deals from Louisville (SDF) to Boulder (DEN)

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This Weekend's Flight Deals from Louisville to Boulder

This weekend's flight prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Jun 20 - Tue, Jun 24
LEX
Blue Grass
DEN
Denver Intl.
$418 Roundtrip, found 2 days ago
$418
Roundtrip
found 2 days ago
Select Delta flight, departing Fri, Jun 20 from Blue Grass to Denver Intl., returning Tue, Jun 24, priced at $418 found 2 days ago

Airfares from $111 One Way, $217 Round Trip from Louisville to Boulder

Prices starting at $217 for return flights and $111 for one-way flights to Boulder were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Aug 11 - Thu, Aug 14
SDF
Louisville
DEN
Denver
$217 Roundtrip, found 5 days ago
$217
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Mon, Aug 11 from Louisville to Denver, returning Thu, Aug 14, priced at $217 found 5 days ago
Mon, Aug 11 - Thu, Aug 14
SDF
Louisville
DEN
Denver
$227 Roundtrip, found 5 days ago
$227
Roundtrip
found 5 days ago
Select United flight, departing Mon, Aug 11 from Louisville to Denver, returning Thu, Aug 14, priced at $227 found 5 days ago
Mon, Aug 11 - Thu, Aug 14
SDF
Louisville
DEN
Denver
$231 Roundtrip, found 5 days ago
$231
Roundtrip
found 5 days ago
Select American Airlines flight, departing Mon, Aug 11 from Louisville to Denver, returning Thu, Aug 14, priced at $231 found 5 days ago
Mon, Aug 11 - Thu, Aug 14
SDF
Louisville
DEN
Denver
$237 Roundtrip, found 5 days ago
$237
Roundtrip
found 5 days ago
Select American Airlines flight, departing Mon, Aug 11 from Louisville to Denver, returning Thu, Aug 14, priced at $237 found 5 days ago
Mon, Aug 11 - Thu, Aug 14
SDF
Louisville
DEN
Denver
$238 Roundtrip, found 5 days ago
$238
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Mon, Aug 11 from Louisville to Denver, returning Thu, Aug 14, priced at $238 found 5 days ago

Boulder economy flight packages

Price found within the past 48 hours. Click for updated prices.
The Rally Hotel at McGregor Square
4.0-star property

The Rally Hotel at McGregor Square

9.6/10 Exceptional! (1,375 reviews)

Aug 6 - Aug 9

3 night stay

Louisville (SDF) to Denver (DEN)

Southwest Airlines • Coach

Denver (DEN) to Louisville (SDF)

American Airlines • Coach
per person
found 1 hour ago
The property is great and many places to go in walking distance.

Reviewed on Apr 22, 2025

The Crawford Hotel
5.0-star property

The Crawford Hotel

9.2/10 Wonderful! (1,002 reviews)

Aug 6 - Aug 9

3 night stay

Louisville (SDF) to Denver (DEN)

Southwest Airlines • Coach

Denver (DEN) to Louisville (SDF)

American Airlines • Coach
Save 100% on your flight
per person
found 1 hour ago
Great location and cool hotel.

Reviewed on May 26, 2025

Urban Cowboy Denver
2.0-star property

Urban Cowboy Denver

10/10 Exceptional! (23 reviews)

Aug 6 - Aug 9

3 night stay

Louisville (SDF) to Denver (DEN)

Southwest Airlines • Coach

Denver (DEN) to Louisville (SDF)

American Airlines • Coach
per person
found 1 hour ago
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More About Flying To Boulder from Louisville

Route Information for Flights from Louisville to Boulder

Origin Airport IATA Code
SDF
Destination Airport IATA Code
DEN
Distance
Direct Flight Airlines
Earliest Flight Arrival
Latest Flight Arrival

Frequently asked questions

Are there non-stop flights from Louisville to Boulder?
Yep, your memorable vacation is just one easy flight away. Excellent news, isn't it? Cruise in comfort on board one of the 3 carriers that fly directly from Louisville, KY (SDF-Louisville Intl.) to DEN. Top picks include:
  • United Airlines
  • Southwest Airlines
  • Frontier Airlines

What is the shortest flight from Louisville to Boulder?
With the trip from Louisville to Boulder taking a minimum of 4 hours and 7 minutes, you'll have plenty of time to relax and enjoy the ride. Ask for a glass of wine and get comfy in your seat with a riveting novel or movie.
What airlines fly from Louisville to Boulder most frequently?
The carriers that have the most frequent flights between SDF and Denver, CO (DEN-Denver Intl.) include United Airlines (UA). This popular option operates 56 flights on the route every month. Alternatively, book a seat with Southwest Airlines (WN). You'll have 30 monthly flights between Louisville and Boulder to choose from with this airline.
What is the cheapest day of the week to fly?
Consider flying out early in the week to save on your airfare. Orbitz data from 2021 shows that Monday is the cheapest day to depart, followed by Tuesday. Saturday showed the highest average ticket prices likely because many travelers prefer to start their vacation on a weekend.
What is the cheapest month to fly?
We won't keep you guessing, according to Orbitz data from 2021, the cheapest month to fly is February. Perfect for those who need a weekend getaway, or just a break from it all in the shortest month of the year. Be aware that the most expensive time to fly is during the height of summer in July, and in the holiday month of December.*According to flight demand on Orbitz.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.