£59 Find Cheap Flights from Denver to San Diego – Compare and Save

These are the earliest and latest flight times available from Denver to San Diego:

• Earliest: departs at 05:55 and lands at 08:26
• Latest: departs at 23:55 and lands at 02:26.

The flight takes about 2h 31m.

Only Economy class is available on flights from Denver to San Diego.

A direct flight from Denver to San Diego takes 2h 31m, covering 852 miles.

No, a passport is not required for this domestic route, but you will need another form of identification, such as a driving licence.

Return flights from Denver to San Diego range from £92 to £208, with an average of £149 over the past 12 months. Anything below £92 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 52% above the £149 route average. Book 5 weeks before departure for the lowest fares.

On this route, stopover flights are cheaper than direct options on average. Stopover fares average £134 return via San Francisco (SFO), compared with £149 for direct.

Alaska Airlines is slightly above the route average for timely arrivals, while Frontier has a lower on-time arrival rate. On-time arrival rates on Denver to San Diego flights are:

• Alaska Airlines: 85% on time
• Frontier: 84% on time
• United Airlines: 81% on time

On average, flights on this route are punctual 79% of the time.

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge £30–£75 for the first checked bag in Economy. Premium fares and elite status bookings typically include a free checked bag.

The Boeing 737-800 Passenger/BBJ2 (winglets) family is used most often on this route, operated mainly by Southwest and Alaska Airlines. Other aircraft seen on the route include Airbus A321neo variants.

Morning is the busiest departure period on Denver to San Diego flights, with 36% leaving in that window. Afternoon departures account for 36%, Evening flights for 17%, and Night flights for 11%.

Alaska Airlines is the only airline on the Denver to San Diego route offering in-flight Wi-Fi. Pricing depends on fare class.

One-way fares from Denver to San Diego are currently lower than usual. Average one-way flight prices are about £77, which is 30% below the typical average for this route.

San Diego Airport (SAN) hosts 5 major car hire companies, with daily rates starting from around £40 for economy cars. Top options include:

• Dollar
• Payless
• Europcar
• Thrifty
• Fox

Flights from Denver to San Diego usually depart from Denver Intl (DEN) and arrive at San Diego (SAN).

Morning flights have the fewest delays on this route, while evening departures tend to have the most.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Denver to San Diego route, 21% of flights were delayed in the past three months, with delays averaging 2h 12m.

One-stop flights from Denver to San Diego most commonly connect through:

• Phoenix Sky Harbor Intl (PHX) – 72% of one-stop connections
• Salt Lake City (SLC) – 12% of one-stop connections
• San Francisco (SFO) – 8% of one-stop connections
• Dallas/Fort Worth (DFW) – 4% of one-stop connections

Yes. Flexible dates can save you up to 13% on flights from Denver to San Diego. Wednesday is the cheapest departure day at £141 return on average, while Monday is the most expensive at £161, a difference of £20.

KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

4 airlines operate flights between Denver and San Diego. The airlines offering direct flights on this route include:

• Southwest
• United Airlines
• Alaska Airlines
• Frontier

Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time of 4h 25m, compared to 5h 41m via Phoenix Sky Harbor Intl (PHX) and 8h 51m via Las Vegas Harry Reid Intl (LAS).

San Diego is 1 hour behind Denver (Pacific Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in San Diego are San Diego Convention Center, La Jolla Cove, and Hyatt Regency Mission Bay Spa and Marina. These are among the most viewed places in San Diego on KAYAK.

Among airlines operating Denver to San Diego flights:

• Frontier: offers free seat selection
• Alaska Airlines: offers extra legroom; offers free seat selection
• United Airlines: offers extra legroom; offers free seat selection
• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• Alaska Airlines: a cabin bag and a checked bag in Economy class
• United Airlines: a cabin bag and a checked bag in Economy class
• Southwest: a cabin bag and a checked bag in Economy class

Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.

You can use three lactation rooms located post-security at Terminal 1 West Rotunda, second level, near the elevator. There’s also a room at Terminal 1 East Rotunda on the ground level after the security checkpoint. In Terminal 2, the lactation room is on the second level close to Gate 34-35. The rooms are fitted with a hand washing station, comfortable seating, artwork, electrical outlets, soft lighting, and a children’s seat.

Different airlines, including United Airlines and Frontier, fly nonstop from Denver International Airport to San Diego International Airport. Frontier also flies through the McCarran International Airport (LAS), but the flight could take longer. Book through KAYAK for details on different flights if you want to find the shortest route.

Yes, the Denver International Airport allows pets. To help you manage your pet, the airport offers a pet relief area in each concourse. There’s also one at the Jeppesen Terminal. The relief rooms are located post-security in the cores of A, B, and C Gates. All pet relief rooms have artificial turf flooring and a drainage system. There are disposal containers and bags.

Travelers who need special assistance can contact their airlines prior to the trip to request assistance. At the San Diego International Airport, all terminals are wheelchair accessible. You can find an accessible shuttle, and if you need help, there are telephones at the airport’s reservation boards.

Wi-Fi at the San Diego International Airport is available in 2h sessions. If you want to connect quickly, enable your device's wireless connection and search for #SANfreewifi, then connect. To use the service longer, you just need to log back in when the session expires.