HOU to SJU flight delays & on-time performance
Nonstop flights from William P. Hobby Airport to Luis Munoz Marin International Airport · 1,997 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at HOU or SJU right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Houston (HOU) to San Juan (SJU) arrived on time 48% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.1% were cancelled, and 14% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 10am did best (67% on time); around 7pm did worst (40%).
- Friday was the most reliable day to fly (70% on time) and Saturday the least (55%).
- The largest source of delay minutes was late-arriving aircraft (46%).
Which airline is most on time from HOU to SJU?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 48% | 1.1% | 30 min | 14.3% | 92 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 10am67%16 flights
- 11am44%16 flights
- 7pm40%42 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday33%0.0% cancelled
- Tuesday13%0.0% cancelled
- Wednesday38%0.0% cancelled
- Thursday44%0.0% cancelled
- Friday70%0.0% cancelled
- Saturday55%2.6% cancelled
- Sunday56%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft46%
- Airline (crew, maintenance, cleaning, fueling)28%
- Extreme weather15%
- Air traffic control & airport congestion10%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Air traffic control & airport congestion100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Extreme weather0%
- Security0%
HOU to SJU: common questions
- How often are HOU to SJU flights on time?
- 48% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Houston to San Juan cancelled?
- 1.1% of scheduled flights were cancelled (1 of 92).
- How long are typical delays?
- Across all flights the average arrival delay was 30 min (early arrivals count as zero). Flights that were late arrived 54 min behind schedule on average, and 14.3% of flights were an hour or more late.
- How long is taxi time at HOU?
- Flights on this route spent 14 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SJU to HOU — 77% on time
More flights from Houston
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: HOU → SJU, nonstop flights by US airlines that report to the DOT. How we calculate this.