75% of flights from Baltimore to Salt Lake City arrived on time over the past 12 months. That is worse than the typical U.S. route. Most reliable airline: Delta Air Lines (79%). 9% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for BWI → SLC: when a flight was late, it was under 45 minutes late 59% of the time. About 1 in 15 flights landed an hour or more late, and 1 in 154 three hours or more; 1.8% were cancelled outright.
- On time or early75%
- 15–30 min late9.6%
- 30–60 min late6.8%
- 1–2 hours late5.1%
- 2–3 hours late1.2%
- 3+ hours late0.7%
- Diverted0.1%
- Cancelled1.8%
Share of all 769 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Southwest Airlines | 409 | 71% | 1.7% | +2 min | 8.1% | +52 min | Southwest Airlines |
| Delta Air Lines | 360 | 79% | 1.9% | −5 min | 5.6% | +62 min | Delta Air Lines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at BWI). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | Delta Air Lines |
|---|---|
| 7 a.m. | 79% |
By month
Each calendar month pooled over 2023–2026. Best: October (89%). Worst: June (67%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 111 | 78% | 3.6% |
| Tuesday | 105 | 84% | 0.9% |
| Wednesday | 104 | 71% | 0.0% |
| Thursday | 105 | 79% | 0.9% |
| Friday | 107 | 74% | 0.0% |
| Saturday | 127 | 70% | 1.6% |
| Sunday | 110 | 68% | 5.5% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 8 · airline 6
Month by month
Not enough months with data to draw a trend.
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| DL 1176 | 7:15 a.m. | 359 | 79% | 1.9% | −5 min | Delta Air Lines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Jan 25, 2026 | 3 | 0% | 3 |
| Jun 13, 2026 | 3 | 0% | 0 |
| Feb 15, 2026 | 3 | 0% | 1 |
| Mar 28, 2026 | 3 | 0% | 0 |
| Feb 23, 2026 | 3 | 0% | 2 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Baltimore or Salt Lake City. IAD → SLC has been 5 points more reliable.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| BWI → SLC (this route) | 769 | 75% | 1.8% |
| IAD → SLC Washington Dulles to Salt Lake City | 701 | 80% | 1.4% |
Questions
How often are flights from BWI to SLC on time?
75% of 769 scheduled flights from Baltimore, MD to Salt Lake City, UT arrived within 15 minutes of schedule between September 2025 and August 2026. 1.8% were cancelled.
Which airline is most on time from BWI to SLC?
Delta Air Lines: 79% of its 360 flights on the route arrived on time. Southwest Airlines: 71%.
What month has the most delays from BWI to SLC?
June (67% on time). The best month is October (89%), over 2023–2026.
Related
- SLC → BWI (return)
- Baltimore/Washington (BWI) delays by hour
- Flights into Salt Lake City (SLC)
- Southwest Airlines on-time record
- Delta Air Lines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.