Cheap flights from Colorado to San Diego from $32

If you are unable to visit San Diego during the month of January, then departing from Colorado during the month February is also very affordable. Most momondo users find prices during this month for around $137.

The cheapest day to depart from Colorado to San Diego is on a Thursday. Travelers who choose to depart for San Diego on a Thursday will often find tickets for as low as $197. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $237. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

The cheapest time of day to fly to San Diego is in the evening when flights can be purchased for as low as $178. Flights at noon are often more expensive with an average ticket price of $288.

Fly from Denver Intl to San Diego for the best Colorado - San Diego flight prices

You are more likely to see cheaper flights to San Diego from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $183 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Colorado for as low as $146 on momondo.

There are 4 cabin classes available to choose from on Colorado to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

United Airlines, Southwest, and Delta are the most popular carriers operating from Colorado to San Diego

Frontier, United Airlines and Southwest are the top three most popular airlines that fly to San Diego from Colorado according to our data. Frontier is the first choice among our users, with 51% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 9 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

As of February 2026, 23 flights take off from Colorado and land in San Diego each day. The most common flight departure time for this route is 1:00PM, with 34% of daily flights taking off at noon.

As of February 2026, there are 163 flights per week flying from Colorado to San Diego. The most common day of the week flights depart is Wed, with 20% of flights taking off on this day.