Best Time to Fly BWI to SLC: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → Salt Lake City International
Data through July 2026 · Last updated October 18, 2026
769 flights were scheduled from Baltimore (BWI) to Salt Lake City (SLC) in the last 12 months, and 77.2% of those that flew arrived on time, in line with the US average of 77.6%.
Among 2 airlines, Delta Air Lines led with 80.5% on time and Southwest Airlines was last with 74.4%.
Over 24 months, Tuesday was the most reliable day (88% on time) and June the worst month (67%).
The cancellation rate was 1.6% (US average 1.8%).
BWI to SLC on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 80.5% | 63 min | 1.7% | 360 |
| Southwest Airlines | 74.4% | 54 min | 1.5% | 409 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to SLC
On-time arrival % by scheduled departure hour (local time), 1,532 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 66.7% | 0.0% | 48 |
| 7am–8am | 83.8% | 0.9% | 689 |
| 8am–9am | 87.7% | 1.9% | 108 |
| 9am–10am | 77.9% | 0.6% | 173 |
| 10am–11am | 83.5% | 0.8% | 122 |
| 11am–12pm | Limited data | 16 | |
| 12pm–1pm | 65.9% | 0.0% | 44 |
| 1pm–2pm | 77.7% | 0.9% | 105 |
| 2pm–3pm | 86.1% | 0.0% | 36 |
| 3pm–4pm | 65.7% | 0.0% | 35 |
| 4pm–5pm | Limited data | 2 | |
| 5pm–6pm | Limited data | 13 | |
| 6pm–7pm | 58.5% | 1.5% | 66 |
| 7pm–8pm | Limited data | 20 | |
| 8pm–9pm | 59.5% | 2.3% | 43 |
| 9pm–10pm | Limited data | 12 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BWI to SLC
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 23 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 56.4% | -24.9 pts | 1.8% | 56 |
| Summer peak (Jun 15 - Aug 15) | 74.0% | -7.3 pts | 0.8% | 260 |
| All other days | 81.3% | — | 0.9% | 1,193 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).