Route
BOS → SLC
Boston Logan International Airport Salt Lake City International Airport
2,105 miles
Return route SLC → BOS →
How punctual is this route?
- On-time arrivals
- 73.4%
- Less than 15 minutes late
- Cancelled
- 1.8%
- Of scheduled flights
- Average delay when late
- 70 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,264
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 45%
- Late-arriving aircraft 27%
- Air traffic control & airport 27%
- Extreme weather 1%
- 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 | 88.0% | 92 |
| October 2025 | 80.2% | 92 |
| November 2025 | 82.5% | 97 |
| December 2025 | 65.7% | 107 |
| January 2026 | 69.4% | 92 |
| February 2026 | 67.0% | 110 |
| March 2026 | 72.7% | 132 |
| April 2026 | 83.7% | 92 |
| May 2026 | 68.5% | 93 |
| June 2026 | 69.1% | 110 |
| July 2026 | 76.3% | 123 |
| August 2026 | 62.6% | 124 |
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 |
|---|---|---|---|---|
| Delta Air Lines | 1,083 | 77.5% | 1.2% | 74 min |
| JetBlue Airways | 181 | 48.0% | 5.5% | 61 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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