Flights Houston → San Juan
IAH → SJU
How long is the flight from Houston to San Juan?
The flight from Houston (IAH) to San Juan (SJU) takes 3h 57m on average. That is the median time recorded across 2 scheduled flights on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
Route overview
The flight route from Houston to San Juan operates with a high level of punctuality, with 88% of flights arriving on time. Over the course of a year, there are approximately 201 flights on this route, each averaging a delay of just 4.7 minutes. The Boeing 737-900 and Boeing 737-800 aircraft serve this busy destination airport which sees over ten million passengers annually.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The Houston (IAH) → San Juan (SJU) route is operated by United Airlines. Across 558 flights monitored in recent months, 85% arrived on time (within 15 min of schedule), with an average delay of 9 minutes. The cancellation rate is 0.72%. FlightGuard's average computed risk is 15.9/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At San Juan the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from Houston the average ATFM delay is 5.5 minutes.
Heading to San Juan: what to expect in this direction
Flying from Houston (IAH) to San Juan (SJU) heads east for about 3,228 km, a flight time of roughly 3h 57m.
Departures from Houston on this leg cluster in the morning window: about 40% of IAH-SJU flights take off then.
Air-traffic congestion: departing Houston the average ATFM delay is 5.5 min (atfm); arriving into San Juan it is 2.0 min (atfm).
Across 558 tracked IAH-SJU flights, 85% left on time with an average delay of 9 min and a 0.7% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| United Airlines (UA) | 83% | 5 min | 1.3% |
Airlines operating IAH-SJU
Airports
Frequently asked questions about IAH-SJU
The flight from Houston (IAH) to San Juan (SJU) takes 3h 57m on average. That is the median time recorded across 2 scheduled flights on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
On the Houston (IAH) -> San Juan (SJU) route, on-time performance is 85% with an average delay of 9 minutes, based on 558 tracked flights.
The cancellation rate on Houston-San Juan is 0.72% across 558 monitored flights.
The route is operated by 1 airline: United Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at San Juan, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
