Salt Lake City (SLC) to Baltimore (BWI): On-Time Performance
Data through May 2026
The calendar drives reliability on SLC–BWI. October 2024 flights landed on schedule 93% of the time, but August 2024 dropped to 39% — a gap of 54 points. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 77%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 2.1
- last 12 months
- Duration
- 4h 6m
- scheduled
- Distance
- 1,865 mi
Best airline from SLC to BWI
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 79% | 11 min | 0.9% | 805 |
| Delta Air Lines | 76% | 12 min | 1.4% | 720 |
Monthly on-time trend
Best time to fly from SLC to BWI
Aim for departures around 6 a.m. (95% on-time); avoid 3 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 12 min |
| Tuesday | 82% | 8 min |
| Wednesday | 81% | 9 min |
| Thursday | 75% | 13 min |
| Friday | 73% | 14 min |
| Saturdaybest | 83% | 9 min |
| Sunday | 74% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft31%
- Airline operations39%
- National airspace system27%
- Weather2%
Frequently asked questions
- How often are flights from SLC to BWI delayed?
- 23% of SLC–BWI flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 11 minutes.
- Which airline is most reliable from SLC to BWI?
- Southwest Airlines has the best on-time record on this route at 79%, based on 805 flights. 2 airlines flew SLC–BWI frequently enough to compare in this period.
- What is the best time of day to fly from SLC to BWI?
- Departures around 6 a.m. have the best record (95% on-time), while departures around 3 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SLC to BWI?
- The scheduled SLC–BWI flight time averages 4h 6m over 1,865 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are SLC to BWI flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from SLC to BWI?
- August 2024 was the roughest month in this dataset, with only 39% of arrivals on time. The best was October 2024 at 93%. If your dates are flexible, that 54-point gap is worth planning around.
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Based on 1,525 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.