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Route on-time record

BOS to SAN: most on-time flights and the best time to fly

Boston (Boston Logan International Airport) to San Diego (San Diego International Airport). 1,787 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 1.3% were cancelled. The most reliable flight number was JetBlue 219 at 9:00 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

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BOS → SAN

Boston to San Diego: 1,787 nonstop flights a year

On time (12 months)

78%

Cancelled

1.3%

avg delay 13 min

Best time to leave

9 AM to noon

89% on time vs 72% 3 to 6 PM

Most reliable airline

JetBlue

85% chance on time

Check BOS to SAN fares

Lowest nonstop fare seen in the next two months: $177 (JetBlue 919 on 2026-11-20). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

  1. #1 · JetBlue 219

    9:00 AM → 12:31 PM6h 31m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    91%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 91% of the time (142 flights, Jun 2025 to May 2026).
    • Never cancelled in 143 scheduled flights.
    • Leaves in this route's most on-time window (9 AM to noon: 89% on time; 3 to 6 PM: 72%).
    • Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).

    Moderate track record · 142 flights

    Find JetBlue 219 fares Opens this date on Aviasales

  2. #2 · JetBlue 919

    6:00 AM → 9:15 AM6h 24m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    90%

    chance on time

    On time (history)
    92%
    Cancelled
    1.4%
    Avg arrival delay
    6 min
    • Arrived on time 92% of the time (143 flights, Jun 2025 to May 2026).
    • Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
    • Lands inside SAN's trouble window: 66% of its 166 ground stops and delay programs started between 6 AM and noon.

    Moderate track record · 143 flights

    Find JetBlue 919 fares Opens this date on Aviasales

  3. #3 · JetBlue 619

    9:25 AM → 1:08 PM6h 30m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    89%

    chance on time

    On time (history)
    90%
    Cancelled
    1.1%
    Avg arrival delay
    7 min
    • Arrived on time 90% of the time (259 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 89% on time; 3 to 6 PM: 72%).
    • Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).

    Strong track record · 259 flights

    Find JetBlue 619 fares Opens this date on Aviasales

  4. #4 · JetBlue 319

    4:15 PM → 7:33 PM6h 18m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    86%

    chance on time

    On time (history)
    86%
    Cancelled
    0.0%
    Avg arrival delay
    10 min
    • Arrived on time 86% of the time (157 flights, Jun 2025 to May 2026).
    • Never cancelled in 158 scheduled flights.
    • Leaves in this route's least on-time window (3 to 6 PM: 72% on time; 9 AM to noon: 89%).
    • Departs inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.

    Moderate track record · 157 flights

    Find JetBlue 319 fares Opens this date on Aviasales

  5. #5 · Alaska 539

    8:05 AM → 11:32 AM6h 27m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    79%

    chance on time

    On time (history)
    95%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 95% of the time (19 flights, Jun 2025 to May 2026).
    • Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
    • Lands inside SAN's trouble window: 66% of its 166 ground stops and delay programs started between 6 AM and noon.

    Limited track record · 19 flights

    Find Alaska 539 fares Opens this date on Aviasales

  6. #6 · JetBlue 19

    3:50 PM → 7:19 PM6h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    76%

    chance on time

    On time (history)
    76%
    Cancelled
    2.4%
    Avg arrival delay
    18 min
    • Arrived on time 76% of the time (201 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (3 to 6 PM: 72% on time; 9 AM to noon: 89%).
    • Departs inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
    • 56% of its delay minutes came from the plane arriving late from an earlier flight.

    Strong track record · 201 flights

    Find JetBlue 19 fares Opens this date on Aviasales

  7. #7 · Delta 571

    5:30 PM → 9:07 PM6h 29m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    66%

    chance on time

    On time (history)
    68%
    Cancelled
    1.6%
    Avg arrival delay
    14 min
    • Arrived on time 68% of the time (352 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (3 to 6 PM: 72% on time; 9 AM to noon: 89%).
    • Departs inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.

    Strong track record · 352 flights

    Find Delta 571 fares Opens this date on Aviasales

  8. #8 · Alaska 389

    5:40 PM → 9:21 PM6h 41m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    62%

    chance on time

    On time (history)
    64%
    Cancelled
    1.3%
    Avg arrival delay
    22 min
    • Arrived on time 64% of the time (308 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (3 to 6 PM: 72% on time; 9 AM to noon: 89%).
    • Departs inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.

    Strong track record · 308 flights

    Find Alaska 389 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • JetBlue85%

    915 flights · 87% on time as flown · 1.1% cancel

  • Alaska Airlines70%

    508 flights · 70% on time as flown · 1.5% cancel

  • Delta Air Lines69%

    364 flights · 68% on time as flown · 1.6% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM86%

    452 flights · avg delay 9 min

  • 9 AM to noon89%

    283 flights · avg delay 8 min

  • 3 to 6 PM72%

    1,021 flights · avg delay 16 min

Best day: Wednesday (79%). Worst: Saturday (72%).

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

J
82
F
74
M
85
A
76
M
80
J
76
J
70
A
72
S
72
O
74
N
80
D
80

What delays this route

  • Late-arriving aircraft36%
  • Air traffic control and airport volume32%
  • Airline (crew, maintenance, boarding)28%
  • Severe weather3%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

Finding the most reliable connections from BOS to SAN…

BOS to SAN questions

What time of day is best to fly BOS to SAN?
9 AM to noon: 89% of flights arrived on time, against 72% for departures 3 to 6 PM.
Which airline is most on time from BOS to SAN?
JetBlue, with a season-adjusted 85% chance of operating and arriving on time over 915 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on BOS to SAN?
July (70% on time); the best was March (85%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?
No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

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Live status: FAA delays and ground stops