£73 Find Cheap Flights from San Diego to Denver – Compare and Save

Frontier Airlines offers nonstop flights from San Diego International Airport to Denver International Airport in Denver. Other airlines on this route include United Airlines and Southwest Airlines, which offer a fast way to travel from San Diego to Denver.

The airport offers different accessibility services located throughout the airport to assist travelers with mobility impairments. Services under this category include visual paging monitors, TDD telephones, and a courtesy cart run by Volunteer Airport Ambassadors, located conveniently throughout the airport. Also, you’ll find the Harbor Police Officers, who assist travelers with special needs.

San Diego International Airport is a smoke-free facility. You’re only permitted to smoke in a designated area away from the terminals. You can use ashtrays located in all smoking areas.

The SkyRide bus and A Line rail system offer affordable means of transport from Denver International Airport to downtown Denver and nearby towns. You can also use an Uber from the airport or travel via the shuttle service to nearby cities like Welby, Aurora, Federal Heights, and Commerce City. If your friends or family will pick you up, make sure they can find a good parking spot as curbside parking is prohibited.

Guests can use different amenities and facilities when they arrive at the airport. These include free Wi-Fi, religious facilities open 24h a day, and pet relief areas near gates A, B, and C. If you want to nurse your child, there are three nursing rooms located at each concourse.

Among airlines operating San Diego to Denver flights:

• Frontier: offers free seat selection
• United Airlines: offers extra legroom; offers free seat selection
• Alaska 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 San Diego and Denver. The airlines offering direct flights on this route include:

• Southwest
• United Airlines
• Alaska Airlines
• Frontier

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

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

• Frontier: a cabin bag and a checked bag in Economy class
• United Airlines: a cabin bag and a checked bag in Economy class
• Alaska Airlines: a cabin 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 San Diego to Denver.

On this route, stopover flights are cheaper than direct options on average. Stopover fares average £120 return via Las Vegas Harry Reid Intl (LAS), compared with £138 for direct.

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge £30–£74 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 San Diego to Denver most commonly connect through:

• Phoenix Sky Harbor Intl (PHX) – 47% of one-stop connections
• Las Vegas Harry Reid Intl (LAS) – 37% of one-stop connections
• Salt Lake City (SLC) – 16% of one-stop connections

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

On the San Diego to Denver route, being flexible with your departure day can save you up to 27%. Saturday is the cheapest day at £122 return on average, while Monday is the most expensive at £167 – a £45 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

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 San Diego to Denver route, 16% of flights were delayed in the past 3 months, with delays averaging 2 hours 24 minutes.

Morning is the busiest departure period on San Diego to Denver flights, with 48% leaving in that window. Afternoon departures account for 35%, Evening flights for 17%, and Night flights for 0%.

Some of the most popular sights in Denver are Colorado Convention Center, Hyatt Regency Denver at Colorado Convention Center, and Coors Field. These are among the most viewed places in Denver on KAYAK.

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

• Earliest: departs at 06:15 and lands at 08:43
• Latest: departs at 21:45 and lands at 00:13.

The flight takes about 2h 28m.

Last-minute fares on this route (booked within 2 weeks of departure) run 53% above the route average of £138. Book 4 weeks before departure for the lowest fares.

A direct flight from San Diego to Denver takes 2h 28m, covering 852 miles.

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 San Diego to Denver are currently lower than usual. Average one-way flight prices are about £79, which is 25% below the typical average for this route.

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

• United Airlines: 90% on time
• Frontier: 89% on time
• Alaska Airlines: 86% on time

On average, flights on this route are punctual 84% 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 Phoenix Sky Harbor Intl (PHX) gives the shortest average 1-stop total travel time of 4h 49m, compared to 5h 26m via Salt Lake City (SLC) and 5h 29m via Las Vegas Harry Reid Intl (LAS).

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

Denver Intl Airport (DEN) hosts 5 major car hire companies, with daily rates starting from around £12 for economy cars. Top options include:
• Routes Car & Truck Rentals
• Ace
• NU Car
• Europcar
• Hertz

Return flights from San Diego to Denver range from £87 to £201, with an average of £138 over the past 12 months. Anything below £87 counts as a good deal.

Two airlines offer in-flight Wi-Fi on San Diego to Denver flights:

• • Alaska Airlines
• • JetBlue