C$ 141 Find Cheap Flights from Denver to San Diego – Compare and Save

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.

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.

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

• Southwest
• United Airlines
• Alaska Airlines
• Frontier

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

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

• Alaska Airlines: a carry-on bag and a checked bag in Economy Class
• United Airlines: a carry-on bag and a checked bag in Economy Class
• Southwest: a carry-on bag and a checked bag in Economy Class

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

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

On this route, direct flights are cheaper than layover options on average. Direct fares average C$ 268 round-trip, compared to C$ 286 via a layover through Salt Lake City (SLC).

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 56–C$ 139 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.

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

• Phoenix Sky Harbor Intl (PHX) – 60% of one-stop connections
• Salt Lake City (SLC) – 30% of one-stop connections
• Las Vegas Harry Reid Intl (LAS) – 10% of one-stop connections

Phoenix Sky Harbor Intl (PHX) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 15% on the Denver to San Diego route. Wednesday is the cheapest departure day at C$ 248 round-trip on average, while Monday is the most expensive at C$ 289, a difference of C$ 42. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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, 20% of flights were delayed in the past 3 months, with delays averaging 2 hours 17 minutes.

Afternoon is the busiest departure period on Denver to San Diego flights, with 38% leaving in that window. Morning departures account for 32%, Evening flights for 18%, and Night flights for 12%.

Some of the most popular sights in San Diego are San Diego Convention Center, Mission Beach, and Old Town San Diego State Historic Park. These are among the most viewed places in San Diego on KAYAK.

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

• Earliest: departs at 5:50 am and lands at 8:19 am
• Latest: departs at 11:55 pm and lands at 2:24 am.

The flight takes about 2h 29m.

Last-minute fares on this route – booked within 2 weeks of departure – run 45% above the route average of C$ 269. Book 5 weeks before departure for the lowest fares.

A direct flight from Denver to San Diego takes 2h 29m, covering 2,206 km.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

One-way fares from Denver to San Diego are currently lower than usual. Average one-way flight prices are about C$ 152, which is 21% below the typical average for this route.

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: 86% on time
• Frontier: 84% on time
• United Airlines: 82% on time

On average, flights on this route are punctual 80% of the time.

Morning flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 5h 08m, compared with 5h 29m via Phoenix Sky Harbor Intl (PHX) and 6h 53m 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.

San Diego Airport (SAN) hosts 5 major car rental companies, with daily rates starting from around C$ 19 for economy cars. Top options include:
• Dollar
• Payless
• Europcar
• Thrifty
• Fox

Round-trip flights from Denver to San Diego range from C$ 165 to C$ 376, with an average of C$ 269 over the past 12 months. Anything below C$ 165 counts as a good deal.

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