$44 Cheap flight deals from Carlsbad (SAN) to Boulder (DEN)

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This Weekend's Flight Deals from Carlsbad 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.

Airfares from $44 One Way, $127 Round Trip from Carlsbad to Boulder

Prices starting at $127 for return flights and $44 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.

Boulder economy flight packages

Price found within the past 48 hours. Click for updated prices.
Hotel Polaris
Renaissance Denver Hotel & Conference Center
Homewood Suites by Hilton Denver Int'l Airport
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More About Flying To Boulder from Carlsbad

Route Information for Flights from Carlsbad to Boulder

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

Carlsbad to Boulder

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Frequently asked questions

Are there non-stop flights from Carlsbad to Boulder?
Yes, if you're heading from San Diego, CA (SAN-San Diego Intl.) to Denver Intl. Airport (DEN), you'll only have one flight number to keep in mind. There are 3 airlines that offer nonstop services to pick from. Here are a few of the best:

  • Southwest Airlines
  • United Airlines
  • Frontier Airlines

What is the shortest flight from Carlsbad to Boulder?
If conditions are good and all goes according to plan, you could be flying into DIA airport from San Diego, CA (SAN-San Diego Intl.) in as little as 2 hours and 15 minutes. With such a fast flight time, consider traveling with hand luggage only.
What airlines fly from Carlsbad to Boulder most frequently?
Southwest Airlines (WN) offers 178 flights every month between San Diego, CA (SAN-San Diego Intl.) to Denver, CO (DEN-Denver Intl.). Your next big adventure is just a few clicks away. Alternatively, reserve your favorite window (or aisle) seat with United Airlines (UA). You'll have 152 monthly flights between Carlsbad and Boulder to select from with this carrier.
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.

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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.