Route Reliability
Raleigh–Durham → San Juan
RDU–SJU · 1,432 miles · Raleigh–Durham International Airport to Luis Muñoz Marín International Airport
- 73%
- Arrive within 15 minutes
- 22 min
- Average arrival delay
- 1.9%
- Cancelled
- 469
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.JetBlue Airways79%329 flights
- 2.Frontier Airlines58%123 flights
Not enough history to rank: Delta Air Lines (17 flights). We rank airlines only after 100 flights on the route.
What the data says
Morning flights do better here.
RDU–SJU flights departing between 6–9 AM arrived on time 100% of the time, versus 53% between 9 PM–12 AM.
Saturdays have been rough.
RDU–SJU flights arrived on time 85% of the time on Wednesdays and just 58% on Saturdays. That gap is worth planning around.
JetBlue Airways has a clear lead on this route.
JetBlue Airways arrived on time 79% of the time on this route; Frontier Airlines managed 58%.
Ticking up lately.
RDU–SJU flights arrived on time 78% of the time over the last three months in the data, compared with 74% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon65%(78 flights)
- Tue79%(43 flights)
- Wed85%(47 flights)
- Thu82%(65 flights)
- Fri83%(80 flights)
- Sat58%(78 flights)
- Sun65%(68 flights)
- 6–9 AM100%(10 flights)
- 9 AM–12 PM77%(168 flights)
- 12–3 PM77%(64 flights)
- 3–6 PM74%(138 flights)
- 6–9 PM56%(39 flights)
- 9 PM–12 AM53%(40 flights)
Jun 63% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 63% | 40 |
| July 2025 | 75% | 48 |
| August 2025 | 66% | 41 |
| September 2025 | 72% | 18 |
| October 2025 | 82% | 17 |
| November 2025 | 65% | 40 |
| December 2025 | 67% | 51 |
| January 2026 | 80% | 40 |
| February 2026 | 75% | 36 |
| March 2026 | 65% | 49 |
| April 2026 | 83% | 40 |
| May 2026 | 87% | 39 |
Keep nerding
Based on 469 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.