$68 Cheap flight deals from Boulder (DEN) to Carlsbad (SAN)

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This Weekend's Flight Deals from Boulder to Carlsbad

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, May 3 - Mon, May 5
DEN
Denver Intl.
SAN
San Diego Intl.
$191 Roundtrip, found 1 hour ago
$191
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sat, May 3 from Denver Intl. to San Diego Intl., returning Mon, May 5, priced at $191 found 1 hour ago
Fri, May 2 - Sun, May 4
DEN
Denver Intl.
CLD
McClellan-Palomar
$512 Roundtrip, found 5 days ago
$512
Roundtrip
found 5 days ago
Select American Airlines flight, departing Fri, May 2 from Denver Intl. to McClellan-Palomar, returning Sun, May 4, priced at $512 found 5 days ago

Airfares from $68 One Way, $136 Round Trip from Boulder to Carlsbad

Prices starting at $136 for return flights and $68 for one-way flights to Carlsbad were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, May 24 - Wed, May 28
DEN
Denver
SAN
San Diego
$136 Roundtrip, found 1 hour ago
$136
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sat, May 24 from Denver to San Diego, returning Wed, May 28, priced at $136 found 1 hour ago
Wed, May 21 - Sat, May 24
DEN
Denver
SAN
San Diego
$214 Roundtrip, found 10 hours ago
$214
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Wed, May 21 from Denver to San Diego, returning Sat, May 24, priced at $214 found 10 hours ago
Wed, May 21 - Sat, May 24
DEN
Denver
SAN
San Diego
$214 Roundtrip, found 10 hours ago
$214
Roundtrip
found 10 hours ago
Select United flight, departing Wed, May 21 from Denver to San Diego, returning Sat, May 24, priced at $214 found 10 hours ago
Fri, Jul 4 - Mon, Jul 7
DEN
Denver
CLD
Carlsbad
$217 Roundtrip, found 1 hour ago
$217
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Fri, Jul 4 from Denver to Carlsbad, returning Mon, Jul 7, priced at $217 found 1 hour ago
Sun, Oct 26 - Wed, Oct 29
DEN
Denver
SAN
San Diego
$217 Roundtrip, found 2 days ago
$217
Roundtrip
found 2 days ago
Select Delta flight, departing Sun, Oct 26 from Denver to San Diego, returning Wed, Oct 29, priced at $217 found 2 days ago

Carlsbad economy flight packages

Price found within the past 48 hours. Click for updated prices.
Motel 6 Oceanside, CA
2.0-star property

Motel 6 Oceanside, CA

6.4/10 (1,001 reviews)

Jun 7 - Jun 9

2 night stay

Denver (DEN) to San Diego (SAN)

Alaska Airlines • Non-stop • Coach

San Diego (SAN) to Denver (DEN)

Frontier Airlines • Non-stop • Coach
per person
found 1 day ago
No smoke detector in room. Old bar of soap left in shower. After checking in I saw a homeowner man walking around the building. His pa to looked like dirty rags. He went into a room. Evidently he was staying there. When I went to get my luggage out of my car I sat it at the back corner of my car while I got some things out of the front seat. I saw a shadow by my bag and went to it. There was a girl standing there , she looked homeless. Went she was me she said oh. Then she started following me to my room. I stopped and turned around and she just stop and turned her back to me. I just stood there and waited for her to go in front of me and then I noticed her turn right by where my room was at heading to another room so I continue to go forward until I thought she had gotten into her room because I didn’t want her to know which room I was in. She really seemed like she was going to steal my luggage. I understand the hotel probably cannot turn homeless people away, but I did Phil and Safe while I was there and that girl is definitely up to something.

Reviewed on Mar 24, 2025

Hotel Avenida - Oceanside Camp Pendleton
2.5-star property

Hotel Avenida - Oceanside Camp Pendleton

5.4/10 (1,002 reviews)

Jun 7 - Jun 9

2 night stay

Denver (DEN) to San Diego (SAN)

Alaska Airlines • Non-stop • Coach

San Diego (SAN) to Denver (DEN)

Frontier Airlines • Non-stop • Coach
per person
found 1 day ago
I was very happy with my stay at this hotel my room very clean the front desk service was great Kelvin was very friendly l will recommend this hotel for your next stay in Oceanside ca.

Reviewed on Jul 7, 2021

Quality Inn & Suites Oceanside near Camp Pendleton
2.5-star property

Quality Inn & Suites Oceanside near Camp Pendleton

7.4/10 Good! (1,003 reviews)

Jun 7 - Jun 9

2 night stay

Denver (DEN) to San Diego (SAN)

Alaska Airlines • Non-stop • Coach

San Diego (SAN) to Denver (DEN)

Frontier Airlines • Non-stop • Coach
per person
found 1 day ago
Location was fantastic.

Reviewed on May 9, 2022

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More About Flying To Carlsbad from Boulder

Route Information for Flights from Boulder to Carlsbad

Origin Airport IATA Code
DEN
Destination Airport IATA Code
SAN
Distance
852 mi
Direct Flight Airlines
Air Canada, Frontier Airlines, Southwest Airlines, Copa Airlines, Lufthansa, United Airlines
Earliest Flight Arrival
2:15PM UTC
Latest Flight Arrival
6:13AM UTC

Boulder to Carlsbad

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Access Your Flight Information Anytime

Use the Orbitz app or the mobile Orbitz site, m.orbtiz.com, to see information about your Boulder to Carlsbad flights anytime you need it. Your itinerary is also sent to your email address for reference. Access updates on your flights from Boulder to Carlsbad on your mobile device too, including delays and baggage claim details.

Cheap Air Ticket Prices Guaranteed

Orbitz is your number one source for low fares for Boulder to Carlsbad flights. Our low price guarantee on domestic and international air tickets give you great savings for a perfect trip to Carlsbad. Need hotels too? You can book them last minute on your mobile phone.

Frequently asked questions

Are there non-stop flights from Boulder to Carlsbad?
Buckle up and enjoy a relaxing flight on board one of the 3 airlines that fly directly from DIA airport to San Diego, CA (SAN-San Diego Intl.). Here’s a list of reliable carriers to book with:

  • Southwest Airlines
  • United Airlines
  • Frontier Airlines

What is the shortest flight from Boulder to Carlsbad?
If conditions are good and all goes according to plan, you could be landing at San Diego, CA (SAN-San Diego Intl.) from Denver, CO (DEN-Denver Intl.) in just 2 hours and 20 minutes. With such a quick flight time, contemplate bringing just hand luggage.
What airlines fly from Boulder to Carlsbad most frequently?
Check out Southwest Airlines (WN). This airline offers some of the most frequent flights from Denver Intl. Airport (DEN) to San Diego Airport. It operates 178 services on this route every month and is popular with passengers. If you can’t find the right flight there, check out the fares with United Airlines (UA). This airline is a fantastic alternative and operates 152 flights between Boulder and Carlsbad each month.
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.