San Francisco International Airport
San Francisco, United StatesSFO / KSFO
International hub · 130 direct destinations · 4 runways · longest runway 11,870 ft
74 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Route
San Francisco → San Diego
SFO
San FranciscoSan Francisco International Airport
San FranciscoSan Francisco International AirportSANSan DiegoSan Diego International Airport
San DiegoSan Diego International Airport- Distance
- 447 mi
- Estimated flight time
- ~1h 25m
Same local time in San Francisco and San Diego.
Observed nonstop
How often does this route fly?
Frequency
Throughout the day
On average around 20.25 flights a day, observed from October 2025 to September 2026.
- 20.3
- flights per day
- 23
- busiest month · Jul
- 18
- quietest month · Mar
- 1 hr 10 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 19Jan2026
- 18.5Feb
- 18Mar
- 19Apr
- 20May
- 21.5Jun
- 23Jul
- 22Aug
- 22.5Sep
- 21Oct2025
- 20.5Nov
- 19Dec
Airlines
Who flies it
United Airlinesall year
Southwest Airlinesall year
SkyWest Airlinesall year
Horizon Airall year
Alaska Airlinesall year
Frontier Airlinessummer
Through the day
Departure times
Local time in San Francisco. Most departures between 17:00 and 20:00.
- 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
- 21.3Mon
- 19.4Tue
- 18.2Wed
- 19.9Thu
- 22.1Fri
- 18.3Sat
- 19Sun
Fleet
Aircraft observed
- Boeing 737-800B73826%
- Embraer 175E75L25%
- Boeing 737 MAX 8B38M14%
- Boeing 737-700B73713%
- Boeing 737-900B7395%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 19 | 563 |
|
| February 2026 | 18.5 | 513 |
|
| March 2026 | 18 | 544 |
|
| April 2026 | 19 | 545 |
|
| May 2026 | 20 | 550 |
|
| June 2026 | 21.5 | 633 |
|
| July 2026 | 23 | 684 |
|
| August 2026 | 22 | 670 |
|
| September 2026 | 22.5 | 683 |
|
| October 2025 | 21 | 624 |
|
| November 2025 | 20.5 | 590 |
|
| December 2025 | 19 | 517 |
|
Airlines observed on this route
From observed callsign routes on SFO-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 San Francisco: 130.
- 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
91 °F · Partly cloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
OAK SANOakland San Francisco Bay AirportOakland is about 11 mi from San Francisco.View route →SFO CLDMcClellan-Palomar AirportCarlsbad is about 28 mi from San Diego.View route →SJC SANMineta San Jose International AirportSan Jose is about 30 mi from San Francisco.View route →STS SANCharles M. Schulz Sonoma County AirportSanta Rosa is about 66 mi from San Francisco.View route →
About the route from San Francisco to San Diego
The observed direct connection between San Francisco International Airport (SFO) and San Diego International Airport (SAN) covers approximately 447 mi. The estimated flight time is around 1h 25m. Alaska Airlines, Frontier Airlines, Horizon Air, 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 San Francisco from San Diego by air?
- The great-circle distance between San Francisco International Airport and San Diego International Airport is approximately 447 mi.
- How long is the flight from San Francisco to San Diego?
- Based on the distance, the estimated flight time is about 1h 25m. This is an estimate, not a schedule.
- Is there a direct connection from San Francisco to San Diego?
- Yes, a direct connection between SFO and SAN has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Alaska Airlines, Frontier Airlines, Horizon Air, SkyWest Airlines, Southwest Airlines and United Airlines.
- How often is there a flight from San Francisco to San Diego?
- On average around 20.25 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 7,116 observed flights. Mainly United Airlines, Southwest Airlines, SkyWest Airlines. That is an observation, not a timetable.
- What is the current time difference between San Francisco and San Diego?
- Same local time in San Francisco and San Diego.
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.