Holiday travel
July 4 at CHS
Charleston International Airport, Charleston, SC. July 2023 – July 2026. Set against CHS’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 better in two and about the same in two of the four years. The gap ran from 0.6 points above usual in 2023 to 9.4 points above usual in 2024.
2.02% of scheduled departures were cancelled across the July 4 windows, against 3.33% on ordinary days of the same weekdays. It was lower in two of the four years.
| Year | Departures | On time | Usual | Gap, points | Cancelled | Usual |
|---|---|---|---|---|---|---|
| 2023Jul 1–5, 2023 | 336 | 74.6% | 74.0% | +0.6about the same | 1.49% | 3.38% |
| 2024Jul 1–5, 2024 | 370 | 83.3% | 73.9% | +9.4better | 0.81% | 3.11% |
| 2025Jul 1–5, 2025 | 347 | 78.8% | 73.8% | +5.0better | 2.88% | 3.24% |
| 2026Jul 1–5, 2026 | 330 | 73.8% | 72.6% | +1.2about the same | 3.03% | 3.63% |
| All years4 windows | 1,383 | 77.8% | 73.6% | +4.2better | 2.02% | 3.33% |
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 (71.2% on time, 3.7 points below usual) and July 4 highest (86.3%, 13.3 points above usual). This cannot say whether the same day was worst or best in each year.
July 4 itself carried 22% fewer departures than an ordinary day of the same weekday and ran 86.3% on time.
- 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 | 72.4% | 70.9% | +1.5about the same | 3.42% | — · — · — · — |
| Jun 29Sat, Sun, Mon · outside the window | 3% fewer | 82.6% | 72.4% | +10.2better | 1.32% | — · — · — · — |
| Jun 30Sun, Mon, Tue · outside the window | 2% fewer | 77.5% | 73.2% | +4.3about the same | 4.05% | — · — · — · — |
| Jul 1Sat, Mon, Tue, Wed | 4% fewer | 71.2% | 74.9% | −3.7about the same | 4.58% | — · — · — · — |
| Jul 2Sun, Tue, Wed, Thu | 3% fewer | 79.5% | 74.2% | +5.3better | 1.39% | — · — · — · — |
| Jul 3Mon, Wed, Thu, Fri | 7% fewer | 82.4% | 73.3% | +9.1better | 0.71% | — · — · — · — |
| July 4Tue, Thu, Fri, Sat | 22% fewer | 86.3% | 73.0% | +13.3better | 1.27% | — · — · — · — |
| Jul 5Wed, Fri, Sat, Sun | 5% fewer | 70.9% | 72.4% | −1.5about the same | 2.05% | — · — · — · — |
| Jul 6Thu, Sat, Sun, Mon · outside the window | about the same | 74.4% | 72.5% | +1.9about the same | 2.92% | — · — · — · — |
| Jul 7Fri, Sun, Mon, Tue · outside the window | about the same | 73.0% | 72.2% | +0.8about the same | 3.96% | — · — · — · — |
| Jul 8Sat, Mon, Tue, Wed · outside the window | about the same | 70.5% | 74.9% | −4.4about the same | 3.03% | — · — · — · — |
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 CHS were Saturday, Jul 1, 2023 (73 departures), Sunday, Jul 2, 2023 (74 departures), Monday, Jul 1, 2024 (81 departures), Wednesday, Jul 3, 2024 (77 departures), Thursday, Jul 3, 2025 (75 departures), Saturday, Jul 5, 2025 (74 departures), Thursday, Jul 2, 2026 (72 departures), and Sunday, Jul 5, 2026 (74 departures).
Across the whole window, flights leaving 5–9 AM had the highest on-time rate: 92.6%, 3.8 points above usual for that time of day. Those leaving 6–9 PM had the lowest: 59.9%, still 2.4 points above usual for that time of day.
The holiday helped flights leaving 9 AM–12 PM the most (4.8 points above usual for that time of day) and those leaving 6–9 PM the least (2.4 points above).
| Leaving | On time, whole window | Usual | Gap, points | On time, busiest days | Usual | Gap, points |
|---|---|---|---|---|---|---|
| 5–9 AM | 92.6% | 88.8% | +3.8better | 92.6% | 88.5% | +4.1about the same |
| 9 AM–12 PM | 87.6% | 82.8% | +4.8better | — | — | — |
| 12–3 PM | 76.0% | 72.4% | +3.6about the same | — | — | — |
| 3–6 PM | 65.2% | 61.8% | +3.4about the same | — | — | — |
| 6–9 PM | 59.9% | 57.5% | +2.4about the same | — | — | — |
| 9 PM–5 AM | — | — | — | — | — | — |
CHS beside every covered airport
Storms and outages move whole regions at once. This puts CHS’s year beside the year of all covered airports together, each against its own usual, to show whether CHS did better or worse than the network.
| Year | CHS on time | CHS, gap from usual | All airports on time | All airports, gap from usual |
|---|---|---|---|---|
| 2023Jul 1–5, 2023 | 74.6% | +0.6 | 73.9% | +2.9 |
| 2024Jul 1–5, 2024 | 83.3% | +9.4 | 82.2% | +11.7 |
| 2025Jul 1–5, 2025 | 78.8% | +5.0 | 73.5% | +2.3 |
| 2026Jul 1–5, 2026 | 73.8% | +1.2 | 73.1% | +3.2 |
For every holiday at once, see the five holidays at CHS, or the network view.