Baltimore (BWI) to Salt Lake City (SLC): On-Time Performance
Data through July 2026
The calendar drives reliability on BWI–SLC. October 2024 flights landed on schedule 97% of the time, but December 2025 dropped to 58% — a gap of 39 points. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (82% vs 60%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 2.1
- last 12 months
- Duration
- 4h 49m
- scheduled
- Distance
- 1,865 mi
Best airline from BWI to SLC
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 82% | 13 min | 1.3% | 751 |
| Southwest Airlines | 76% | 14 min | 0.9% | 843 |
Monthly on-time trend
Best time to fly from BWI to SLC
Aim for departures around 8 a.m. (88% on-time); avoid 6 p.m. departures (59%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 17 min |
| Tuesdaybest | 88% | 7 min |
| Wednesday | 78% | 14 min |
| Thursday | 80% | 10 min |
| Friday | 77% | 12 min |
| Saturday | 73% | 17 min |
| Sunday | 78% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft21%
- Airline operations57%
- National airspace system19%
- Weather2%
- Security1%
Frequently asked questions
- How often are flights from BWI to SLC delayed?
- 21% of BWI–SLC flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from BWI to SLC?
- Delta Air Lines has the best on-time record on this route at 82%, based on 751 flights. 2 airlines flew BWI–SLC frequently enough to compare in this period.
- What is the best time of day to fly from BWI to SLC?
- Departures around 8 a.m. have the best record (88% on-time), while departures around 6 p.m. have the worst (59%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BWI to SLC?
- The scheduled BWI–SLC flight time averages 4h 49m over 1,865 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are BWI to SLC flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from BWI to SLC?
- December 2025 was the roughest month in this dataset, with only 58% of arrivals on time. The best was October 2024 at 97%. If your dates are flexible, that 39-point gap is worth planning around.
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Based on 1,594 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.