George Bush Intercontinental Airport
Houston, United StatesIAH / KIAH
International hub · 159 direct destinations · 5 runways · longest runway 12,001 ft
66 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Houston → San Diego
IAH
HoustonGeorge Bush Intercontinental Airport
HoustonGeorge Bush Intercontinental AirportSANSan DiegoSan Diego International Airport
San DiegoSan Diego International Airport- Distance
- 1,301 mi
- Estimated flight time
- ~3h 5m
San Diego is currently 2 hours behind Houston.
Observed nonstop
How often does this route fly?
Frequency
Several times a day
On average around 4.5 flights a day, observed from October 2025 to September 2026.
- 4.5
- flights per day
- 5
- busiest month · Oct
- 4
- quietest month · Jan
- 2 hr 53 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 4Jan2026
- 4Feb
- 4Mar
- 5Apr
- 5May
- 4Jun
- 5Jul
- 4Aug
- 4Sep
- 5Oct2025
- 5Nov
- 5Dec
Airlines
Who flies it
United Airlinesall year
Through the day
Departure times
Local time in Houston. Most departures between 18:00 and 21:00.
- 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
- 4.5Mon
- 4.1Tue
- 4.2Wed
- 4.1Thu
- 4.5Fri
- 4.4Sat
- 4.3Sun
Fleet
Aircraft observed
- Boeing 737-900B73948%
- Boeing 737 MAX 9B39M32%
- Boeing 737 MAX 8B38M11%
- Boeing 737-800B7387%
- G2800%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 4 | 115 |
|
| February 2026 | 4 | 121 |
|
| March 2026 | 4 | 138 |
|
| April 2026 | 5 | 135 |
|
| May 2026 | 5 | 126 |
|
| June 2026 | 4 | 128 |
|
| July 2026 | 5 | 139 |
|
| August 2026 | 4 | 119 |
|
| September 2026 | 4 | 125 |
|
| October 2025 | 5 | 142 |
|
| November 2025 | 5 | 137 |
|
| December 2025 | 5 | 130 |
|
Airlines observed on this route
From observed callsign routes on IAH-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 Houston: 159.
- 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
90 °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.
About the route from Houston to San Diego
The observed direct connection between George Bush Intercontinental Airport (IAH) and San Diego International Airport (SAN) covers approximately 1,301 mi. The estimated flight time is around 3h 5m. United Airlines has been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Houston from San Diego by air?
- The great-circle distance between George Bush Intercontinental Airport and San Diego International Airport is approximately 1,301 mi.
- How long is the flight from Houston to San Diego?
- Based on the distance, the estimated flight time is about 3h 5m. This is an estimate, not a schedule.
- Is there a direct connection from Houston to San Diego?
- Yes, a direct connection between IAH and SAN has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: United Airlines.
- How often is there a flight from Houston to San Diego?
- On average around 4.5 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 1,555 observed flights. Mainly United Airlines. That is an observation, not a timetable.
- What is the current time difference between Houston and San Diego?
- San Diego is currently 2 hours behind Houston.
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.