Flight OddsSFO → BOS Delta Air Lines
Delta Air Lines · San Francisco, CA to Boston, MA · 899 flights, 2025-07-01 to 2026-06-30 · aggregated across 7 flight numbers
On-time arrival
76%
Median delay
-4 min
90th percentile
+48 min
Cancellation rate
1%
How on-time is Delta Air Lines from SFO to BOS?
Across every Delta Air Lines flight number on SFO → BOS (899 flights, 2025-07-01 to 2026-06-30), 76% arrived within 15 minutes of schedule. Median arrival delay -4 min; the worst 10% ran +48 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 673 | 76% |
| 16-30 min | 79 | 9% |
| 31-60 min | 62 | 7% |
| 61-120 min | 42 | 5% |
| 2+ hrs | 27 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 84 | 85% | +1 min |
| 2025-08 | 78 | 87% | +11 min |
| 2025-09 | 77 | 66% | +24 min |
| 2025-10 | 81 | 70% | +27 min |
| 2025-11 | 76 | 72% | +6 min |
| 2025-12 | 73 | 86% | -9 min |
| 2026-01 | 50 | 86% | +5 min |
| 2026-02 | 49 | 84% | +13 min |
| 2026-03 | 58 | 88% | -8 min |
| 2026-04 | 73 | 74% | +7 min |
| 2026-05 | 87 | 72% | +13 min |
| 2026-06 | 97 | 58% | +20 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 138 | 73% |
| Tue | 133 | 79% |
| Wed | 129 | 72% |
| Thu | 132 | 73% |
| Fri | 131 | 78% |
| Sat | 94 | 86% |
| Sun | 126 | 75% |
DL flight numbers on SFO → BOS
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…