SAN to BOS flight delays & on-time performance
Nonstop flights from San Diego International Airport to Boston Logan International Airport · 2,588 miles · Aug 2025 – Jul 2026
- SAN: Airport closed. Closed, expected to reopen Oct 11 at 13:00 UTC.
On-time arrivals
77%
arrived < 15 min late
Cancelled
1.6%
30 flights
Avg arrival delay
21 min
85 min when late
Airlines
4
1,849 flights tracked
Key facts
- Flights from San Diego (SAN) to Boston (BOS) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.6% were cancelled, and 9% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (80% on time); Alaska Airlines was the least (78%).
- Departures scheduled around 9pm did best (89% on time); around 2pm did worst (43%).
- Saturday was the most reliable day to fly (84% on time) and Thursday the least (72%).
- The largest source of delay minutes was late-arriving aircraft (34%).
Which airline is most on time from SAN to BOS?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 80% | 1.6% | 19 min | 3.4% | 364 |
| JetBlue | 78% | 2.0% | 22 min | 10.9% | 919 |
| Alaska Airlines | 78% | 1.2% | 16 min | 7.9% | 508 |
| Southwest Airlines | 33% | 0.0% | 49 min | 31.0% | 58 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am87%80 flights
- 8am72%176 flights
- 9am72%102 flights
- 10am67%44 flights
- 11am77%209 flights
- 1pm71%152 flights
- 2pm43%93 flights
- 3pm84%99 flights
- 8pm80%363 flights
- 9pm89%241 flights
- 10pm78%273 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday78%2.5% cancelled
- Tuesday77%1.1% cancelled
- Wednesday80%0.8% cancelled
- Thursday72%2.2% cancelled
- Friday77%0.7% cancelled
- Saturday84%0.0% cancelled
- Sunday74%3.6% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft34%
- Air traffic control & airport congestion31%
- Airline (crew, maintenance, cleaning, fueling)27%
- Extreme weather8%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather47%
- Airline (crew, maintenance, cleaning, fueling)40%
- Air traffic control & airport congestion13%
- Security0%
SAN to BOS: common questions
- How often are SAN to BOS flights on time?
- 77% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from San Diego to Boston cancelled?
- 1.6% of scheduled flights were cancelled (30 of 1,849).
- How long are typical delays?
- Across all flights the average arrival delay was 21 min (early arrivals count as zero). Flights that were late arrived 85 min behind schedule on average, and 9.2% of flights were an hour or more late.
- How long is taxi time at SAN?
- Flights on this route spent 21 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BOS to SAN — 77% on time
More flights from San Diego
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SAN → BOS, nonstop flights by US airlines that report to the DOT. How we calculate this.