Best Time to Fly SLC to BWI: On-Time Stats by Hour & Airline
Salt Lake City International → Baltimore/Washington International Thurgood Marshall
Data through July 2026 · Last updated October 18, 2026
769 flights were scheduled from Salt Lake City (SLC) to Baltimore (BWI) in the last 12 months, and 81.4% of those that flew arrived on time, 3.7 points above the US average of 77.6%.
Among 2 airlines, Southwest Airlines led with 84.2% on time and Delta Air Lines was last with 78.2%.
Over 24 months, Saturday was the most reliable day (85% on time) and August the worst month (62%).
The cancellation rate was 1.3% (US average 1.8%).
SLC to BWI 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 |
|---|---|---|---|---|
| Southwest Airlines | 84.2% | 51 min | 1.0% | 409 |
| Delta Air Lines | 78.2% | 35 min | 1.7% | 360 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SLC to BWI
On-time arrival % by scheduled departure hour (local time), 1,532 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 24 | |
| 6am–7am | 94.7% | 1.7% | 58 |
| 7am–8am | Limited data | 6 | |
| 8am–9am | Limited data | 8 | |
| 9am–10am | Limited data | 18 | |
| 10am–11am | 87.0% | 0.0% | 54 |
| 11am–12pm | 72.3% | 4.0% | 50 |
| 12pm–1pm | 77.2% | 0.0% | 137 |
| 1pm–2pm | 77.0% | 1.3% | 154 |
| 2pm–3pm | 81.0% | 1.9% | 103 |
| 3pm–4pm | 62.8% | 0.0% | 52 |
| 5pm–6pm | 85.3% | 1.9% | 154 |
| 11pm–12am | 77.6% | 0.4% | 714 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SLC to BWI
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) | 58.2% | -23.4 pts | 1.8% | 56 |
| Summer peak (Jun 15 - Aug 15) | 74.0% | -7.5 pts | 0.4% | 260 |
| All other days | 81.6% | — | 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).