Holiday travel
July 4 at SJU
Luis Muñoz Marín International Airport, San Juan, PR. July 2023 – July 2026. Set against SJU’s own ordinary days of the same weekday in the weeks around each holiday.
The window, year by year
The window runs July 1 through July 5, around July 4, whatever weekday it falls on. In the data: Jul 1–5, 2023; Jul 1–5, 2024; Jul 1–5, 2025; Jul 1–5, 2026. July 4 fell on a Tuesday in 2023, Thursday in 2024, Friday in 2025, and Saturday in 2026. Four windows are in the data: enough to see whether a day repeats, not enough to call it a rule.
Compared with ordinary days, July 4 flights were about the same in three and worse in one of the four years. The gap ran from 6.2 points below usual in 2023 to 3.4 points above usual in 2026.
1.27% of scheduled departures were cancelled across the July 4 windows, against 1.85% on ordinary days of the same weekdays. It was lower in one of the four years.
| Year | Departures | On time | Usual | Gap, points | Cancelled | Usual |
|---|---|---|---|---|---|---|
| 2023Jul 1–5, 2023 | 504 | 67.0% | 73.2% | −6.2worse | 1.59% | 1.88% |
| 2024Jul 1–5, 2024 | 553 | 72.8% | 73.0% | −0.2about the same | 0.54% | 1.86% |
| 2025Jul 1–5, 2025 | 536 | 75.1% | 72.7% | +2.4about the same | 1.68% | 1.75% |
| 2026Jul 1–5, 2026 | 531 | 76.5% | 73.1% | +3.4about the same | 1.32% | 1.91% |
| All years4 windows | 2,124 | 72.9% | 73.0% | −0.1about the same | 1.27% | 1.85% |
Day by day
No single day has enough flights in one year to compare the years, so the days are ranked on all four years pooled: July 1 ran lowest (68.3% on time, 5.0 points below usual) and July 4 highest (75.3%, 3.1 points above usual). This cannot say whether the same day was worst or best in each year.
- Better than usual
- Worse than usual
- About the same
- What ordinary days of the same weekday had
- Lowest to highest single year
- Lighter bars: days just outside the window
Bars show the on-time arrival rate and start at 60%, not zero.
| Day | Departures against an ordinary day | On time | Usual | Gap, points | Cancelled | Each year: 2023, 2024, 2025, 2026 |
|---|---|---|---|---|---|---|
| Jun 28Fri, Sat, Sun · outside the window | about the same | 70.3% | 72.8% | −2.5about the same | 1.47% | — · — · — · — |
| Jun 29Sat, Sun, Mon · outside the window | about the same | 75.9% | 73.1% | +2.8about the same | 0.59% | — · — · — · — |
| Jun 30Sun, Mon, Tue · outside the window | 2% more | 75.5% | 72.8% | +2.7about the same | 0.90% | — · — · — · — |
| Jul 1Sat, Mon, Tue, Wed | about the same | 68.3% | 73.3% | −5.0worse | 1.17% | — · — · — · — |
| Jul 2Sun, Tue, Wed, Thu | 3% fewer | 74.7% | 73.0% | +1.7about the same | 1.69% | — · — · — · — |
| Jul 3Mon, Wed, Thu, Fri | about the same | 73.4% | 73.2% | +0.2about the same | 0.69% | — · — · — · — |
| July 4Tue, Thu, Fri, Sat | 4% fewer | 75.3% | 72.2% | +3.1about the same | 0.95% | — · — · — · — |
| Jul 5Wed, Fri, Sat, Sun | 4% fewer | 73.0% | 73.3% | −0.3about the same | 1.88% | — · — · — · — |
| Jul 6Thu, Sat, Sun, Mon · outside the window | about the same | 70.6% | 72.8% | −2.2about the same | 2.25% | — · 73.1 · — · — |
| Jul 7Fri, Sun, Mon, Tue · outside the window | about the same | 68.2% | 72.8% | −4.6worse | 2.51% | — · — · — · — |
| Jul 8Sat, Mon, Tue, Wed · outside the window | about the same | 65.6% | 73.2% | −7.6worse | 2.07% | — · — · — · — |
A dash means fewer than 120 flights stood behind the figure, or behind the ordinary days it would be compared with: too few to print a rate, and nothing is estimated in its place. “Usual” is what ordinary days of the same weekday had at the same place in the weeks around the holiday, weighted by the flights being compared.
Which departure times held up
The busiest days at SJU were Saturday, Jul 1, 2023 (109 departures), Sunday, Jul 2, 2023 (105 departures), Monday, Jul 1, 2024 (116 departures), Wednesday, Jul 3, 2024 (114 departures), Thursday, Jul 3, 2025 (113 departures), Saturday, Jul 5, 2025 (112 departures), Friday, Jul 3, 2026 (108 departures), and Saturday, Jul 4, 2026 (109 departures).
Across the whole window, flights leaving 5–9 AM had the highest on-time rate: 85.9%, about level with usual for that time of day. Those leaving 6–9 PM had the lowest: 58.7%, 4.8 points below usual for that time of day.
Against usual for their time of day, flights leaving 12–3 PM did best (+2.3 points) and those leaving 6–9 PM did worst (−4.8 points).
On each year’s two busiest days, flights leaving 5–9 AM had the highest on-time rate: 85.8%, about level with usual for that time of day. Those leaving 3–6 PM had the lowest: 60.6%, 2.8 points below usual for that time of day.
Against usual for their time of day, flights leaving 12–3 PM did best (+5.0 points) and those leaving 3–6 PM did worst (−2.8 points).
| Leaving | On time, whole window | Usual | Gap, points | On time, busiest days | Usual | Gap, points |
|---|---|---|---|---|---|---|
| 5–9 AM | 85.9% | 85.3% | +0.6about the same | 85.8% | 86.0% | −0.2about the same |
| 9 AM–12 PM | 75.6% | 78.9% | −3.3about the same | — | — | — |
| 12–3 PM | 75.6% | 73.3% | +2.3about the same | 77.8% | 72.8% | +5.0about the same |
| 3–6 PM | 65.7% | 63.7% | +2.0about the same | 60.6% | 63.4% | −2.8about the same |
| 6–9 PM | 58.7% | 63.5% | −4.8about the same | — | — | — |
| 9 PM–5 AM | 64.8% | 67.6% | −2.8about the same | — | — | — |
SJU beside every covered airport
Storms and outages move whole regions at once. This puts SJU’s year beside the year of all covered airports together, each against its own usual, to show whether SJU did better or worse than the network.
| Year | SJU on time | SJU, gap from usual | All airports on time | All airports, gap from usual |
|---|---|---|---|---|
| 2023Jul 1–5, 2023 | 67.0% | −6.2 | 73.9% | +2.9 |
| 2024Jul 1–5, 2024 | 72.8% | −0.2 | 82.2% | +11.7 |
| 2025Jul 1–5, 2025 | 75.1% | +2.4 | 73.5% | +2.3 |
| 2026Jul 1–5, 2026 | 76.5% | +3.4 | 73.1% | +3.2 |
For every holiday at once, see the five holidays at SJU, or the network view.