Denver to San Diego (DEN–SAN) — Airlines, Schedules & Connections
No flights match your filters.
No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
DEN–SAN is served by 6 airlines with nonstop service. Southwest Airlines, United Airlines and Alaska Airlines lead the route. The flight covers 852 miles in approximately 2h 25m. Beyond nonstop, 1-stop connecting options are also available.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| WN Southwest Airlines | 94 | 738, 73H, 7M8, 7S7, B38M | 2h13-2h30 | – | – | |
| UA United Airlines Also: AC, CM, LX | 45 | 32Q, 739, A21N, B39M | 2h10-2h27 | Star Alliance | AC, CM, LX | |
| AS Alaska Airlines Also: HA | 43 | 73H, E75, E75L | 2h22-2h44 | Oneworld | HA | |
| F9 Frontier Also: Y4 | 14 | 321, A20N | 2h13-2h22 | – | Y4 | |
| SY Sun Country Airlines | 1 | – | – | – | – | |
| DL Delta Air Lines | 0 | – | – | SkyTeam | – |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Other ways to reach San Diego from Denver
| Metric | DEN→SAN | BJC→SAN | COS→SAN |
|---|---|---|---|
| Distance from DEN | – | 24 mi | 73 mi |
| Nonstop airlines | 6 | 3 | 4 |
| Weekly flights | 232 | 1 | 8 |
| Flight time | 2h 25m | 1h 51m | 2h 15m |
| Departure OTP | 87% | – | – |
Travel Essentials
DEN: MDT · SAN: PDT
When it's 6:00 PM in Denver, it's 5:00 PM in San Diego.
RTD A Line commuter rail runs from Denver Union Station to the airport (37 min, $10.50). Trains depart every 15 minutes during peak hours. The airport is 25 miles northeast of downtown; ride-shares cost $35–55 and take 30–45 minutes depending on I-70 traffic.Economy parking in lots 4–6 connects via free shuttle. Mountain shuttle services depart from Jeppesen Terminal's Ground Transportation level.
DEN–SAN Quick Facts
Frequently Asked Questions
Denver to San Diego: Mountain to Coast on United's Hub Network
DEN-SAN connects Colorado's capital to Southern California's second-largest city. United, Southwest, and Frontier collectively offer 8 to 13 daily nonstop departures. Block time is about 2 hours 30 minutes westbound. United holds the largest share as part of its Denver hub operation, which is the airline's second-busiest after Houston. The route serves a diverse passenger base: ski tourists heading to Colorado from San Diego, military families connected to San Diego's naval installations, tech workers commuting between the two cities, and general leisure travel in both directions.
Airport Contrast and Connection Value
Denver International (DEN) and San Diego International (SAN) are a study in contrasts. DEN sits on 33,000 acres of plains, 25 miles from downtown, with six runways and massive capacity. SAN operates a single runway on a 661-acre site immediately adjacent to downtown. DEN's hub value is significant. United's connecting banks at DEN feed passengers from across the mountain West, Midwest, and beyond onto the SAN flight. For passengers originating in cities like Boise, Salt Lake, or Kansas City, DEN-SAN is often the most efficient one-stop path to San Diego. SAN's single runway creates peak-hour congestion but the airport's downtown location means ground transport is measured in minutes, not the 30 to 45 minutes required at DEN.