$91 Find Cheap Flights from San Diego to Denver - Compare and Save

The SkyRide bus and A Line rail system offer affordable transportation from Denver International Airport (DEN) to downtown Denver and nearby towns. Uber is also available from the airport and shuttle service operates within the Denver metro area. If travelers are being picked up by friends or family, drivers need to find a parking spot because curbside parking is prohibited.

Nearby cities accessible from DEN include Boulder, Aurora and Fort Collins. Boulder is about 45 minutes away by rideshare and Bustang bus service is available to Fort Collins. Other regional destinations include the Rocky Mountains, Colorado Springs and Aspen. These can be reached by shuttle, car service or public transportation.

The easiest way to travel to SAN varies depending on the traveler's location and preferences. For those in the San Diego area, using a rideshare service like Uber or Lyft, taking a taxi or driving a personal car may be the most convenient option.

Yes. Arriving travelers can rent vehicles from more than 10 major rental-car companies located on Denver International Airport (DEN) property. Courtesy shuttles run to and from Jeppesen Terminal.

Yes, San Diego Airport (SAN) has nursing rooms post-security in Terminals 1 and 2. They include a hand washing area and electrical ports for nursing mothers.

Yes, San Diego International Airport (SAN) offers accessibility services throughout the airport for travelers with mobility impairments. These include visual paging messages displayed on EVIDS monitors and a courtesy cart operated by Volunteer Airport Ambassadors in Terminal 2.

Denver International Airport (DEN) offers free Wi-Fi, religious facilities open daily from 6 a.m. to 8 p.m., pet relief areas near gates A, B and C and nursing rooms throughout the airport. There are four nursing rooms in A Gates, three in B Gates and C Gates and two in Jeppesen Terminal.

Yes. Pet relief rooms are located airside near gates A, B and C, adjacent to U.S. mail drops. They have a canine theme and include hand soap, a wall-mounted sink, artificial grass flooring and a drainage system. A fenced-in outdoor pet relief area is also available at the Jeppesen Terminal, outside door 200.

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 nonstop 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 travelers should check the fare details before booking.

Four cabin classes are available on flights from San Diego to Denver:

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $162 round-trip via Las Vegas Harry Reid Intl (LAS), compared to $187 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$100 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 $165 round-trip on average, while Monday is the most expensive at $226: a $61 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% of flights 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, Coors Field and Ball Arena. 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 6:15 am and lands at 8:43 am
• Latest: departs at 9:45 pm and lands at 12:13 am.

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 $186. Book 4 weeks before departure for the lowest fares.

A nonstop 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 $106, 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

Overall, flights on this route are on time 84% of the time on average.

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 at 4h 49m, compared with 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 rental companies, with daily rates starting from around $16 for economy cars. Top options include:
• Routes Car & Truck Rentals
• Ace
• NU Car
• Europcar
• Hertz

Round-trip flights from San Diego to Denver range from $118 to $271, with an average of $186 over the past 12 months. Anything below $118 counts as a good deal.

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

• Alaska Airlines
• JetBlue

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.