$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.

Sat, Jun 21 - Thu, Jun 26
LEX
Blue Grass
DEN
Denver Intl.
$358 Roundtrip, found 6 days ago
$358
Roundtrip
found 6 days ago
Select United flight, departing Sat, Jun 21 from Blue Grass to Denver Intl., returning Thu, Jun 26, priced at $358 found 6 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 4 days ago
$217
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Mon, Aug 11 from Louisville to Denver, returning Thu, Aug 14, priced at $217 found 4 days ago
Mon, Aug 11 - Thu, Aug 14
SDF
Louisville
DEN
Denver
$227 Roundtrip, found 4 days ago
$227
Roundtrip
found 4 days ago
Select United flight, departing Mon, Aug 11 from Louisville to Denver, returning Thu, Aug 14, priced at $227 found 4 days ago
Mon, Aug 11 - Thu, Aug 14
SDF
Louisville
DEN
Denver
$231 Roundtrip, found 4 days ago
$231
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Aug 11 from Louisville to Denver, returning Thu, Aug 14, priced at $231 found 4 days ago
Mon, Aug 11 - Thu, Aug 14
SDF
Louisville
DEN
Denver
$237 Roundtrip, found 4 days ago
$237
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Aug 11 from Louisville to Denver, returning Thu, Aug 14, priced at $237 found 4 days ago
Mon, Aug 11 - Thu, Aug 14
SDF
Louisville
DEN
Denver
$238 Roundtrip, found 4 days ago
$238
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Mon, Aug 11 from Louisville to Denver, returning Thu, Aug 14, priced at $238 found 4 days ago

Boulder economy flight packages

Price found within the past 48 hours. Click for updated prices.
DoubleTree by Hilton Denver International Airport
4.0-star property

DoubleTree by Hilton Denver International Airport

8.8/10 Excellent! (1,113 reviews)

Jul 22 - Jul 26

4 night stay

Louisville (SDF) to Denver (DEN)

Southwest Airlines • Roundtrip • Coach
per person
found 1 day ago
Good location to make early flights less painful. Ridiculous they charge so much for overnight parking. If I had known that before booking I would have picked a different hotel in the same area.

Reviewed on Apr 14, 2025

The Crawford Hotel
5.0-star property

The Crawford Hotel

9.2/10 Wonderful! (1,002 reviews)

Jul 22 - Jul 26

4 night stay

Louisville (SDF) to Denver (DEN)

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

Reviewed on May 26, 2025

Catbird Hotel
4.0-star property

Catbird Hotel

9.2/10 Wonderful! (803 reviews)

Jul 22 - Jul 26

4 night stay

Louisville (SDF) to Denver (DEN)

Southwest Airlines • Roundtrip • Coach
per person
found 1 day ago
This is my second time here. The bed and pillows are the best! This is what makes me come back to this Denver hotel. It seems minor but the bed and pillows are the most comfortable. I feel like a princess. The rooms are very nice too. The showers, again might seem minor, but the pressure, two shower heads, and it's a spacious nice area. After a day of running around from airports to wherever I'm trying to go in Colorado,a super comfortable bed and nice hot shower are my priorities. Book without hesitation. So worth it. I will be staying here any future trips to Denver.

Reviewed on May 27, 2025

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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
1020 mi
Direct Flight Airlines
Air Canada, Southwest Airlines, United Airlines
Earliest Flight Arrival
3:00PM UTC
Latest Flight Arrival
3:25AM UTC

Louisville to Boulder

Orbitz is the best place to find guaranteed low prices on Louisville to Boulder flights. Because of our cutting-edge mobile tools and low fares on domestic and international flights, Orbitz is the best starting point for travelers.

Find Cheap Louisville to Boulder Flights

Orbitz offers free mobile apps for iPhone and Android devices—a great way to find fantastic deals on flights from Louisville to Boulder. Not only that, but you can check the status of your flight or even book low cost hotel rooms with the apps or on m.orbitz.com.

Get Miles and Points for Your Flight

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Discount Travel Planning Made Simple

You will have no problems finding budget flights from Louisville to Boulder on Orbitz.com. If your travel plans are flexible, you can search for fares three days before and after a specific date to find the best price.

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.