Route
SLC → BWI
Salt Lake City International Airport Baltimore/Washington International Thurgood Marshall Airport
1,865 miles
Return route BWI → SLC →
How punctual is this route?
- On-time arrivals
- 81.2%
- Less than 15 minutes late
- Cancelled
- 1.6%
- Of scheduled flights
- Average delay when late
- 48 min
- Flights arriving 15+ minutes late
- Flights tracked
- 769
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 36%
- Airline (crew, maintenance, cleaning) 33%
- Air traffic control & airport 29%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 85.0% | 60 |
| October 2025 | 78.3% | 60 |
| November 2025 | 89.3% | 57 |
| December 2025 | 69.5% | 60 |
| January 2026 | 86.4% | 71 |
| February 2026 | 79.7% | 78 |
| March 2026 | 91.2% | 68 |
| April 2026 | 91.7% | 61 |
| May 2026 | 58.1% | 62 |
| June 2026 | 79.7% | 64 |
| July 2026 | 84.6% | 65 |
| August 2026 | 80.0% | 63 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 409 | 83.6% | 1.2% | 52 min |
| Delta Air Lines | 360 | 78.3% | 1.9% | 43 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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