Holiday travel
Labor Day at SLC
Salt Lake City International Airport, Salt Lake City, UT. July 2023 – July 2026. Set against SLC’s own ordinary days of the same weekday in the weeks around each holiday.
The window, year by year
The window runs the Saturday through the Monday, around Labor Day (the first Monday of September). In the data: Sep 2–4, 2023; Aug 31 – Sep 2, 2024; Aug 30 – Sep 1, 2025. Three windows are in the data: enough to see whether a day repeats, not enough to call it a rule.
Labor Day flights ran better than ordinary days in all three years. The gap ran from 4.1 points above usual in 2024 to 7.3 points above usual in 2023.
0.39% of scheduled departures were cancelled across the Labor Day windows, against 0.40% on ordinary days of the same weekdays. The rate stayed within a quarter point of usual in all three years.
| Year | Departures | On time | Usual | Gap, points | Cancelled | Usual |
|---|---|---|---|---|---|---|
| 2023Sep 2–4, 2023 | 857 | 92.0% | 84.7% | +7.3better | 0.23% | 0.40% |
| 2024Aug 31 – Sep 2, 2024 | 865 | 88.8% | 84.7% | +4.1better | 0.23% | 0.40% |
| 2025Aug 30 – Sep 1, 2025 | 874 | 91.8% | 84.7% | +7.1better | 0.69% | 0.40% |
| All years3 windows | 2,596 | 90.9% | 84.7% | +6.2better | 0.39% | 0.40% |
Day by day
Labor Day was the worst day of the window in two of the three years. Over the years it ran 89.8% on time, still 6.1 points above an ordinary Monday.
The Saturday before Labor Day was the best day of the window in two of the three years. Over the years it ran 92.1% on time, 4.8 points above an ordinary Saturday.
- 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 70%, not zero. A dashed stub is a day with too few flights to print a rate.
| Day | Departures against an ordinary day | On time | Usual | Gap, points | Cancelled | Each year: 2023, 2024, 2025 |
|---|---|---|---|---|---|---|
| Thursday beforeoutside the window | about the same | 84.5% | 82.4% | +2.1about the same | 0.21% | 86.0 · 84.0 · 83.7 |
| Friday beforeoutside the window | about the same | 81.0% | 83.8% | −2.8worse | 0.21% | 76.5 · 82.4 · 84.0 |
| Saturday before | 5% fewer | 92.1% | 87.3% | +4.8better | 0.37% | 94.5 · 90.7 · 91.1 |
| Sunday before | 15% fewer | 90.9% | 83.2% | +7.7better | 0.60% | 88.7 · 89.6 · 94.3 |
| Labor Day | 2% fewer | 89.8% | 83.7% | +6.1better | 0.21% | 92.7 · 86.6 · 90.2 |
| Tuesday afteroutside the window | 5% fewer | 92.7% | 88.1% | +4.6better | 0.00% | 94.5 · 93.7 · 89.9 |
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 SLC were Saturday, Sep 2, 2023 (272 departures), Monday, Sep 4, 2023 (315 departures), Sunday, Sep 1, 2024 (280 departures), Monday, Sep 2, 2024 (317 departures), Sunday, Aug 31, 2025 (284 departures), and Monday, Sep 1, 2025 (317 departures).
Across the whole window, flights leaving 9 AM–12 PM had the highest on-time rate: 93.1%, 5.4 points above usual for that time of day. Those leaving 6–9 PM had the lowest: 87.4%, still 9.5 points above usual for that time of day.
The holiday helped flights leaving 12–3 PM the most (10.5 points above usual for that time of day) and those leaving 5–9 AM the least (1.9 points above).
On each year’s two busiest days, flights leaving 5–9 AM had the highest on-time rate: 94.7%, 4.2 points above usual for that time of day. Those leaving 6–9 PM had the lowest: 87.2%, still 10.3 points above usual for that time of day.
The holiday helped flights leaving 12–3 PM the most (10.5 points above usual for that time of day) and those leaving 5–9 AM the least (4.2 points above).
| Leaving | On time, whole window | Usual | Gap, points | On time, busiest days | Usual | Gap, points |
|---|---|---|---|---|---|---|
| 5–9 AM | 92.6% | 90.7% | +1.9about the same | 94.7% | 90.5% | +4.2better |
| 9 AM–12 PM | 93.1% | 87.7% | +5.4better | 92.8% | 87.4% | +5.4better |
| 12–3 PM | 92.1% | 81.6% | +10.5better | 92.3% | 81.8% | +10.5better |
| 3–6 PM | 88.2% | 81.5% | +6.7better | 88.8% | 80.5% | +8.3better |
| 6–9 PM | 87.4% | 77.9% | +9.5better | 87.2% | 76.9% | +10.3better |
| 9 PM–5 AM | 90.1% | 85.1% | +5.0better | 90.0% | 84.3% | +5.7better |
SLC beside every covered airport
Storms and outages move whole regions at once. This puts SLC’s year beside the year of all covered airports together, each against its own usual, to show whether SLC did better or worse than the network.
| Year | SLC on time | SLC, gap from usual | All airports on time | All airports, gap from usual |
|---|---|---|---|---|
| 2023Sep 2–4, 2023 | 92.0% | +7.3 | 87.4% | +7.6 |
| 2024Aug 31 – Sep 2, 2024 | 88.8% | +4.1 | 82.1% | +2.4 |
| 2025Aug 30 – Sep 1, 2025 | 91.8% | +7.1 | 82.2% | +2.5 |
For every holiday at once, see the five holidays at SLC, or the network view.