76% of SLC → BOS flights arrived on time in June-August 2026 (357 flights). The most reliable was DL 696, on time 91% of the time on this route. Morning flights did best (85%), evening flights worst (73%). Salt Lake City (SLC): no delay reported. Boston Logan (BOS): no delay reported.
Best time of day to fly SLC → BOS
| Morning (before noon) | |
| Evening (after 5 PM) |
Flights SLC → BOS, most reliable first
| Flight | Departs | On time on this route | Cancelled |
|---|---|---|---|
| DL 696 Delta | 11:31 PM | 0% | |
| DL 657 Delta | 9:50 AM | 0% | |
| DL 702 Delta | 5:15 PM | 0% | |
| B6 248 JetBlue | 11:59 PM | 7.3% |
SLC conditions · BOS conditions · BOS → SLC · Cancellations
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From BTS on-time data, June-August 2026; flights with 20+ trips on this route. On-time rates cover each flight number's whole day, which can include other legs. Departure times are local.