George Bush Intercontinental Airport
Houston, United StatesIAH / KIAH
International hub · 159 direct destinations · 5 runways · longest runway 12,001 ft
79 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Route
Houston → San Carlos
IAH
HoustonGeorge Bush Intercontinental Airport
HoustonGeorge Bush Intercontinental AirportSQLSan CarlosSan Carlos Airport
San CarlosSan Carlos Airport- Distance
- 1,624 mi
- Estimated flight time
- ~3h 45m
San Carlos is currently 2 hours behind Houston.
Observed nonstop
How often does this route fly?
Frequency
Daily at most
On average around 1 flights a day, observed from October 2025 to September 2026.
- 1
- flights per day
- 1
- busiest month · Nov
- 3 hr 38 min
- measured flight time
- 3 / 12
- months seen
Through the year
Per day, month by month
- –Jan2026
- 1Feb
- 1Mar
- –Apr
- –May
- –Jun
- –Jul
- –Aug
- –Sep
- –Oct2025
- 1Nov
- –Dec
Airlines
Who flies it
United Airlinesnow and then
Through the day
Departure times
Local time in Houston. Most departures between 16:00 and 19:00.
- 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
- 0Mon
- 0Tue
- 0.1Wed
- 0Thu
- 0Fri
- 0Sat
- 0Sun
Fleet
Aircraft observed
- Boeing 737 MAX 9B39M63%
- Boeing 757-300B75338%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | Not seen in this month. | ||
| February 2026 | 1 | 2 |
|
| March 2026 | 1 | 2 |
|
| April 2026 | Not seen in this month. | ||
| May 2026 | Not seen in this month. | ||
| June 2026 | Not seen in this month. | ||
| July 2026 | Not seen in this month. | ||
| August 2026 | Not seen in this month. | ||
| September 2026 | Not seen in this month. | ||
| October 2025 | Not seen in this month. | ||
| November 2025 | 1 | 4 |
|
| December 2025 | Not seen in this month. | ||
Airlines observed on this route
From observed callsign routes on IAH-SQL - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- Direct destinations observed from Houston: 159.
- Direct destinations observed from San Carlos: 8.
The airports on this route
San Carlos Airport
San Carlos, United StatesSQL / KSQL
Regional airport · 8 direct destinations · 1 runway · longest runway 2,621 ft
84 °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 Carlos
The observed direct connection between George Bush Intercontinental Airport (IAH) and San Carlos Airport (SQL) covers approximately 1,624 mi. The estimated flight time is around 3h 45m. 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 Carlos by air?
- The great-circle distance between George Bush Intercontinental Airport and San Carlos Airport is approximately 1,624 mi.
- How long is the flight from Houston to San Carlos?
- Based on the distance, the estimated flight time is about 3h 45m. This is an estimate, not a schedule.
- Is there a direct connection from Houston to San Carlos?
- Yes, a direct connection between IAH and SQL 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 Carlos?
- On average around 1 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 8 observed flights. Mainly United Airlines. That is an observation, not a timetable.
- What is the current time difference between Houston and San Carlos?
- San Carlos 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.