About 1 in 3 DL 1655 flights from Boston arrived 15+ minutes late, diverted or cancelled over the past year (35%); 1.8% were cancelled. The typical flight landed 1 minutes late.
DL 1655: BOS → SFO
Scheduled to leave Boston at 4:55 p.m. local time. Over the past year it arrived on time 65% of the time (337 flights), in line with other DL flights on the route at that hour (66%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 50 | 58% |
| Tuesday | 48 | 65% |
| Wednesday | 48 | 73% |
| Thursday | 47 | 60% |
| Friday | 48 | 67% |
| Saturday | 49 | 71% |
| Sunday | 47 | 60% |
Why it was late
All flights BOS → SFO · Connecting off DL 1655? Check the risk
DL 1655: SFO → BOS
Scheduled to leave San Francisco at 9:51 p.m. local time. Over the past year it arrived on time 68% of the time (171 flights), in line with other DL flights on the route at that hour (68%). Last seen in the data Aug 28, 2026.
Usually Delta Air Lines's last flight of the day from San Francisco to Boston (99% of days). Delta Air Lines's last SFO–BOS flight was cancelled 2.4% of the time, against 1.2% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 7:10 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 32 | 63% |
| Tuesday | 20 | 75% |
| Wednesday | 20 | 60% |
| Thursday | 31 | 68% |
| Friday | 30 | 67% |
| Saturday | 12 | — |
| Sunday | 26 | 69% |
Why it was late
All flights SFO → BOS · Connecting off DL 1655? Check the risk
Questions
How often is DL 1655 from BOS to SFO late?
Delta Air Lines 1655 from Boston, MA to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 35% of 337 scheduled flights between September 2025 and August 2026. 1.8% were cancelled.
How often is DL 1655 from SFO to BOS late?
Delta Air Lines 1655 from San Francisco, CA to Boston, MA arrived 15 or more minutes late, was diverted or was cancelled on 32% of 171 scheduled flights between September 2025 and August 2026. 1.8% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Delta Air Lines for today's flight. Method.