BOS to SAN flight delays & on-time performance
Nonstop flights from Boston Logan International Airport to San Diego 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
15 min
60 min when late
Airlines
4
1,849 flights tracked
Key facts
- Flights from Boston (BOS) to San Diego (SAN) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.6% were cancelled, and 8% arrived an hour or more late.
- JetBlue was the most punctual airline here (84% on time); Delta Air Lines was the least (68%).
- Departures scheduled around 9am did best (91% on time); around 5pm did worst (68%).
- Monday was the most reliable day to fly (80% on time) and Friday the least (73%).
- The largest source of delay minutes was late-arriving aircraft (37%).
Which airline is most on time from BOS to SAN?
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 |
|---|---|---|---|---|---|
| JetBlue | 84% | 1.7% | 11 min | 6.4% | 919 |
| Alaska Airlines | 73% | 1.2% | 19 min | 7.6% | 508 |
| Delta Air Lines | 68% | 1.6% | 15 min | 6.8% | 364 |
| Southwest Airlines | 43% | 3.4% | 41 min | 28.6% | 58 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am86%165 flights
- 7am88%160 flights
- 8am84%174 flights
- 9am91%122 flights
- 10am85%118 flights
- 3pm77%148 flights
- 4pm72%427 flights
- 5pm68%494 flights
- 6pm56%40 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday80%3.2% cancelled
- Tuesday77%2.7% cancelled
- Wednesday76%1.2% cancelled
- Thursday79%0.7% cancelled
- Friday73%1.1% cancelled
- Saturday76%0.5% cancelled
- Sunday77%1.8% 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 aircraft37%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion29%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather57%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion10%
- Security0%
BOS to SAN: common questions
- How often are BOS to SAN 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 Boston to San Diego 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 15 min (early arrivals count as zero). Flights that were late arrived 60 min behind schedule on average, and 7.5% of flights were an hour or more late.
- How long is taxi time at BOS?
- Flights on this route spent 23 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SAN to BOS — 77% on time
More flights from Boston
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BOS → SAN, nonstop flights by US airlines that report to the DOT. How we calculate this.