Delta Air Lines SLC to BOS on-time performance
Delta Air Lines nonstop flights from Salt Lake City to Boston · Aug 2025 – Jul 2026
On-time arrivals
84%
arrived < 15 min late
Cancelled
1.3%
14 flights
Avg arrival delay
11 min
62 min when late
Rank on route
#1 of 2
route average 82% on time
Key facts
- Delta Air Lines flights on SLC to BOS arrived on time 84% of the time in Aug 2025 – Jul 2026.
- 1.3% were cancelled, and 6% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 82% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (39%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion39%
- Airline (crew, maintenance, cleaning, fueling)30%
- Late-arriving aircraft29%
- Extreme weather2%
- Security0%
Other airlines on SLC to BOS
- JetBlue73% on time · 21 min avg delay
Full SLC to BOS comparison →
Delta Air Lines on-time record across all routes →
1,083 Delta Air Lines flights tracked on this route; 14 cancelled, 2 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.