RDU to SJU flight delays & on-time performance
Nonstop flights from Raleigh-Durham International Airport to Luis Munoz Marin International Airport · 1,432 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at RDU or SJU right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Raleigh/Durham (RDU) to San Juan (SJU) arrived on time 71% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.9% were cancelled, and 12% arrived an hour or more late.
- JetBlue was the most punctual airline here (76% on time); Frontier Airlines was the least (59%).
- Departures scheduled around 12pm did best (88% on time); around 9pm did worst (45%).
- Wednesday was the most reliable day to fly (86% on time) and Saturday the least (59%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (43%).
Which airline is most on time from RDU 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 |
|---|---|---|---|---|---|
| JetBlue | 76% | 1.8% | 23 min | 11.0% | 333 |
| Frontier Airlines | 59% | 1.7% | 58 min | 17.4% | 117 |
| Delta Air Lines | 56% | 5.9% | 21 min | 6.3% | 17 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am85%20 flights
- 9am82%12 flights
- 10am60%43 flights
- 11am82%119 flights
- 12pm88%25 flights
- 1pm64%14 flights
- 2pm80%35 flights
- 3pm67%58 flights
- 4pm71%15 flights
- 6pm57%24 flights
- 7pm66%48 flights
- 8pm55%31 flights
- 9pm45%21 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday67%1.4% cancelled
- Tuesday76%0.0% cancelled
- Wednesday86%0.0% cancelled
- Thursday77%0.0% cancelled
- Friday79%0.0% cancelled
- Saturday59%6.7% cancelled
- Sunday62%3.9% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)43%
- Late-arriving aircraft41%
- Air traffic control & airport congestion12%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather44%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion11%
- Security11%
RDU to SJU: common questions
- How often are RDU to SJU flights on time?
- 71% 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 Raleigh/Durham to San Juan cancelled?
- 1.9% of scheduled flights were cancelled (9 of 467).
- How long are typical delays?
- Across all flights the average arrival delay was 31 min (early arrivals count as zero). Flights that were late arrived 107 min behind schedule on average, and 12.5% of flights were an hour or more late.
- How long is taxi time at RDU?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SJU to RDU — 82% on time
More flights from Raleigh/Durham
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: RDU → SJU, nonstop flights by US airlines that report to the DOT. How we calculate this.