Denver International Airport
Denver, United StatesDEN / KDEN
International hub · 203 direct destinations · 6 runways · longest runway 16,001 ft
32 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Route
Denver → San Diego
DEN
DenverDenver International Airport
DenverDenver International AirportSANSan DiegoSan Diego International Airport
San DiegoSan Diego International Airport- Distance
- 852 mi
- Estimated flight time
- ~2h 15m
San Diego is currently 1 hour behind Denver.
Observed nonstop
How often does this route fly?
Frequency
Throughout the day
On average around 16 flights a day, observed from October 2025 to September 2026.
- 16
- flights per day
- 17
- busiest month · Nov
- 16
- quietest month · Oct
- 1 hr 58 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 16Jan2026
- 16Feb
- 16Mar
- 16Apr
- 16May
- 17Jun
- 17Jul
- 17Aug
- 17Sep
- 16Oct2025
- 17Nov
- 16Dec
Airlines
Who flies it
Southwest Airlinesall year
United Airlinesall year
Frontier Airlinesall year
Alaska Airlinesall year
SkyWest Airlinesall year
Delta Air Linesnow and then
FedExnow and then
Through the day
Departure times
Local time in Denver. Most departures between 19:00 and 22:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 17.7Mon
- 15.6Tue
- 14.9Wed
- 16.9Thu
- 17.3Fri
- 16.2Sat
- 15.8Sun
Fleet
Aircraft observed
- Boeing 737 MAX 8B38M17%
- Airbus A321neoA21N16%
- Boeing 737-900B73916%
- Boeing 737-800B73814%
- Boeing 737-700B7379%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 16 | 468 |
|
| February 2026 | 16 | 442 |
|
| March 2026 | 16 | 503 |
|
| April 2026 | 16 | 468 |
|
| May 2026 | 16 | 455 |
|
| June 2026 | 17 | 508 |
|
| July 2026 | 17 | 532 |
|
| August 2026 | 17 | 503 |
|
| September 2026 | 17 | 524 |
|
| October 2025 | 16 | 515 |
|
| November 2025 | 17 | 501 |
|
| December 2025 | 16 | 479 |
|
Airlines observed on this route
From observed callsign routes on DEN-SAN - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Denver: 203.
- Direct destinations observed from San Diego: 90.
The airports on this route
San Diego International Airport
San Diego, United StatesSAN / KSAN
Major airport · 90 direct destinations · 1 runway · longest runway 9,400 ft
66 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
DEN CLDMcClellan-Palomar AirportCarlsbad is about 28 mi from San Diego.View route →COS SANCity of Colorado Springs Municipal AirportColorado Springs is about 73 mi from Denver.View route →DEN SNAJohn Wayne Orange County International AirportSanta Ana is about 76 mi from San Diego.View route →DEN PSPPalm Springs International AirportPalm Springs is about 85 mi from San Diego.View route →
About the route from Denver to San Diego
The observed direct connection between Denver International Airport (DEN) and San Diego International Airport (SAN) covers approximately 852 mi. The estimated flight time is around 2h 15m. Alaska Airlines, Delta Air Lines, FedEx, Frontier Airlines, SkyWest Airlines, Southwest Airlines and United Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Denver from San Diego by air?
- The great-circle distance between Denver International Airport and San Diego International Airport is approximately 852 mi.
- How long is the flight from Denver to San Diego?
- Based on the distance, the estimated flight time is about 2h 15m. This is an estimate, not a schedule.
- Is there a direct connection from Denver to San Diego?
- Yes, a direct connection between DEN and SAN has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Alaska Airlines, Delta Air Lines, FedEx, Frontier Airlines, SkyWest Airlines, Southwest Airlines and United Airlines.
- How often is there a flight from Denver to San Diego?
- On average around 16 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 5,898 observed flights. Mainly Southwest Airlines, United Airlines, Frontier Airlines. That is an observation, not a timetable.
- What is the current time difference between Denver and San Diego?
- San Diego is currently 1 hour behind Denver.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.