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4,156 km · Domestic

Boston Logan (BOS) – San Diego (SAN)

In July 2026, 412 flights operated between Boston Logan and San Diego (both directions), and 68.4% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January232225▼ 3.0%
February204208▲ 2.0%
March240302▲ 25.8%
April234287▲ 22.6%
May329327▼ 0.6%
June344404▲ 17.4%
July357412▲ 15.4%
August350––
September267––
October322–in progress
November272––
December262––
Year to date (Jan–Jul)1,9402,165▲ 11.6%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January85.8%79.1%▼ 7.8%
February79.4%78.4%▼ 1.3%
March83.8%74.8%▼ 10.7%
April88.9%79.1%▼ 11.0%
May82.4%87.2%▲ 5.8%
June82.6%74.0%▼ 10.4%
July75.6%68.4%▼ 9.5%
August81.1%––
September74.9%––
October72.0%–in progress
November77.9%––
December75.6%––
Year-to-date average (Jan–Jul)82.6%77.3%▼ 6.5%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January214▲ 600.0%
February416▲ 300.0%
March20▼ 100.0%
April01–
May00–
June02–
July512▲ 140.0%
August1––
September3––
October4–in progress
November2––
December5––
Year to date (Jan–Jul)1345▲ 246.2%

Airlines on this route

  1. JetBlue Airways 49.8%
  2. Alaska Airlines 27.5%
  3. Delta Air Lines 20.9%
  4. Southwest Airlines 1.8%

Oct 1, 2024 – Jul 31, 2026

By direction

BOS → SAN

Scheduled flights
3,145
Flights operated
3,108
Cancelled
37 · 1.2%
On-time departures
82.3%

SAN → BOS

Scheduled flights
3,146
Flights operated
3,105
Cancelled
41 · 1.3%
On-time departures
76.1%

BOS → SAN and SAN → BOS counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
JetBlue Airways B6 3,136 49.8% 81.7% 42
Alaska Airlines AS 1,727 27.5% 77.8% 17
Delta Air Lines DL 1,312 20.9% 79.7% 17
Southwest Airlines WN 116 1.8% 27.2% 2

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay07:00–08:001.5min · 331 recorded · 328 measured
Gap to highest-delay hour19.8min07:00 ↔ 13:00
Recorded flights6,291BOS–SAN

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 91.4% · 269 recorded · 266 measured · Source: the US BTS 07:00 · 89.3% · 331 recorded · 328 measured · Source: the US BTS 08:00 · 76.4% · 561 recorded · 550 measured · Source: the US BTS 09:00 · 83.9% · 468 recorded · 466 measured · Source: the US BTS 10:00 · 81.0% · 362 recorded · 358 measured · Source: the US BTS 11:00 · 74.8% · 295 recorded · 290 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 83 recorded · 83 measured · Source: the US BTS 13:00 · 71.1% · 242 recorded · 235 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 135 recorded · 134 measured · Source: the US BTS 15:00 · 82.0% · 428 recorded · 422 measured · Source: the US BTS 16:00 · 78.6% · 727 recorded · 719 measured · Source: the US BTS 17:00 · 78.1% · 848 recorded · 839 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 40 recorded · 39 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · 74.7% · 561 recorded · 557 measured · Source: the US BTS 21:00 · 84.7% · 371 recorded · 366 measured · Source: the US BTS 22:00 · 79.3% · 570 recorded · 561 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 2.4 min · 269 recorded · 266 measured · Source: the US BTS 07:00 · 1.5 min · 331 recorded · 328 measured · Source: the US BTS 08:00 · 15.3 min · 561 recorded · 550 measured · Source: the US BTS 09:00 · 9.8 min · 468 recorded · 466 measured · Source: the US BTS 10:00 · 8.5 min · 362 recorded · 358 measured · Source: the US BTS 11:00 · 15.9 min · 295 recorded · 290 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 83 recorded · 83 measured · Source: the US BTS 13:00 · 21.2 min · 242 recorded · 235 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 135 recorded · 134 measured · Source: the US BTS 15:00 · 12.9 min · 428 recorded · 422 measured · Source: the US BTS 16:00 · 9.6 min · 727 recorded · 719 measured · Source: the US BTS 17:00 · 10.0 min · 848 recorded · 839 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 40 recorded · 39 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · 18.2 min · 561 recorded · 557 measured · Source: the US BTS 21:00 · 5.9 min · 371 recorded · 366 measured · Source: the US BTS 22:00 · 14.4 min · 570 recorded · 561 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 269 · 269 recorded · 266 measured · Source: the US BTS 07:00 · 331 · 331 recorded · 328 measured · Source: the US BTS 08:00 · 561 · 561 recorded · 550 measured · Source: the US BTS 09:00 · 468 · 468 recorded · 466 measured · Source: the US BTS 10:00 · 362 · 362 recorded · 358 measured · Source: the US BTS 11:00 · 295 · 295 recorded · 290 measured · Source: the US BTS 12:00 · 83 · 83 recorded · 83 measured · Source: the US BTS 13:00 · 242 · 242 recorded · 235 measured · Source: the US BTS 14:00 · 135 · 135 recorded · 134 measured · Source: the US BTS 15:00 · 428 · 428 recorded · 422 measured · Source: the US BTS 16:00 · 727 · 727 recorded · 719 measured · Source: the US BTS 17:00 · 848 · 848 recorded · 839 measured · Source: the US BTS 18:00 · 40 · 40 recorded · 39 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · 561 · 561 recorded · 557 measured · Source: the US BTS 21:00 · 371 · 371 recorded · 366 measured · Source: the US BTS 22:00 · 570 · 570 recorded · 561 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:0091.4%2.4 min266269
07:0089.3%1.5 min328331
08:0076.4%15.3 min550561
09:0083.9%9.8 min466468
10:0081.0%8.5 min358362
11:0074.8%15.9 min290295
12:00Fewer than 200 measured departures—8383
13:0071.1%21.2 min235242
14:00Fewer than 200 measured departures—134135
15:0082.0%12.9 min422428
16:0078.6%9.6 min719727
17:0078.1%10.0 min839848
18:00Fewer than 200 measured departures—3940
19:00No observations———
20:0074.7%18.2 min557561
21:0084.7%5.9 min366371
22:0079.3%14.4 min561570
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 80.0% · 944 recorded · 925 measured · Source: the US BTS Tuesday · 79.4% · 897 recorded · 887 measured · Source: the US BTS Wednesday · 82.3% · 905 recorded · 898 measured · Source: the US BTS Thursday · 77.6% · 927 recorded · 918 measured · Source: the US BTS Friday · 77.6% · 947 recorded · 938 measured · Source: the US BTS Saturday · 79.0% · 729 recorded · 725 measured · Source: the US BTS Sunday · 78.6% · 942 recorded · 922 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 10.9 min · 944 recorded · 925 measured · Source: the US BTS Tuesday · 8.2 min · 897 recorded · 887 measured · Source: the US BTS Wednesday · 8.8 min · 905 recorded · 898 measured · Source: the US BTS Thursday · 14.6 min · 927 recorded · 918 measured · Source: the US BTS Friday · 14.7 min · 947 recorded · 938 measured · Source: the US BTS Saturday · 11.4 min · 729 recorded · 725 measured · Source: the US BTS Sunday · 14.1 min · 942 recorded · 922 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 944 · 944 recorded · 925 measured · Source: the US BTS Tuesday · 897 · 897 recorded · 887 measured · Source: the US BTS Wednesday · 905 · 905 recorded · 898 measured · Source: the US BTS Thursday · 927 · 927 recorded · 918 measured · Source: the US BTS Friday · 947 · 947 recorded · 938 measured · Source: the US BTS Saturday · 729 · 729 recorded · 725 measured · Source: the US BTS Sunday · 942 · 942 recorded · 922 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday80.0%10.9 min925944
Tuesday79.4%8.2 min887897
Wednesday82.3%8.8 min898905
Thursday77.6%14.6 min918927
Friday77.6%14.7 min938947
Saturday79.0%11.4 min725729
Sunday78.6%14.1 min922942

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 82.5% · 473 recorded · 457 measured · Source: the US BTS Feb · 78.9% · 432 recorded · 412 measured · Source: the US BTS Mar · 78.8% · 544 recorded · 542 measured · Source: the US BTS Apr · 83.5% · 522 recorded · 521 measured · Source: the US BTS May · 84.8% · 656 recorded · 656 measured · Source: the US BTS Jun · 77.9% · 750 recorded · 748 measured · Source: the US BTS Jul · 71.8% · 786 recorded · 769 measured · Source: the US BTS Aug · 81.1% · 351 recorded · 350 measured · Source: the US BTS Sep · 74.9% · 270 recorded · 267 measured · Source: the US BTS Oct · 78.1% · 498 recorded · 494 measured · Source: the US BTS Nov · 82.9% · 498 recorded · 496 measured · Source: the US BTS Dec · 76.9% · 511 recorded · 501 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 10.6 min · 473 recorded · 457 measured · Source: the US BTS Feb · 10.2 min · 432 recorded · 412 measured · Source: the US BTS Mar · 14.4 min · 544 recorded · 542 measured · Source: the US BTS Apr · 6.4 min · 522 recorded · 521 measured · Source: the US BTS May · 4.3 min · 656 recorded · 656 measured · Source: the US BTS Jun · 9.7 min · 750 recorded · 748 measured · Source: the US BTS Jul · 16.6 min · 786 recorded · 769 measured · Source: the US BTS Aug · 7.3 min · 351 recorded · 350 measured · Source: the US BTS Sep · 24.6 min · 270 recorded · 267 measured · Source: the US BTS Oct · 17.5 min · 498 recorded · 494 measured · Source: the US BTS Nov · 6.6 min · 498 recorded · 496 measured · Source: the US BTS Dec · 19.3 min · 511 recorded · 501 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 473 · 473 recorded · 457 measured · Source: the US BTS Feb · 432 · 432 recorded · 412 measured · Source: the US BTS Mar · 544 · 544 recorded · 542 measured · Source: the US BTS Apr · 522 · 522 recorded · 521 measured · Source: the US BTS May · 656 · 656 recorded · 656 measured · Source: the US BTS Jun · 750 · 750 recorded · 748 measured · Source: the US BTS Jul · 786 · 786 recorded · 769 measured · Source: the US BTS Aug · 351 · 351 recorded · 350 measured · Source: the US BTS Sep · 270 · 270 recorded · 267 measured · Source: the US BTS Oct · 498 · 498 recorded · 494 measured · Source: the US BTS Nov · 498 · 498 recorded · 496 measured · Source: the US BTS Dec · 511 · 511 recorded · 501 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan82.5%10.6 min457473
Feb78.9%10.2 min412432
Mar78.8%14.4 min542544
Apr83.5%6.4 min521522
May84.8%4.3 min656656
Jun77.9%9.7 min748750
Jul71.8%16.6 min769786
Aug81.1%7.3 min350351
Sep74.9%24.6 min267270
Oct78.1%17.5 min494498
Nov82.9%6.6 min496498
Dec76.9%19.3 min501511

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 78.2% 4,921
  • Delayed >15 min 20.5% 1,292
  • Cancelled 1.2% 78
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

26
26 of 26
Flight numbersBy direction DeparturesOn time
DL571 BOS → SAN 656 81.3%
AS390 SAN → BOS 636 76.1%
B662120 SAN → BOS 620 80.3%
AS389 BOS → SAN 568 76.1%
B66620 SAN → BOS 534 76.4%
B66619 BOS → SAN 533 88.2%
B6619 BOS → SAN 368 79.8%
DL571 SAN → BOS 302 79.1%
B66319 BOS → SAN 251 82.9%
B66219 BOS → SAN 204 89.5%
B66220 SAN → BOS 204 70.1%
B66919 BOS → SAN 174 92.4%
B66920 SAN → BOS 172 74.0%
AS260 BOS → SAN 135 82.4%
AS259 SAN → BOS 104 87.0%
AS255 SAN → BOS 79 65.8%
DL1015 SAN → BOS 62 83.6%
DL1616 SAN → BOS 58 77.2%
WN4930 SAN → BOS 57 24.6%
AS256 BOS → SAN 52 90.4%
DL1358 SAN → BOS 52 81.3%
DL825 SAN → BOS 36 75.0%
DL2298 SAN → BOS 34 62.5%
DL476 SAN → BOS 34 61.8%
WN749 BOS → SAN 34 23.5%
DL1293 SAN → BOS 32 81.3%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 412 +15.4% 12 68.4%
June 2026 404 +17.4% 2 74.0%
May 2026 327 −0.6% 0 87.2%
April 2026 287 +22.6% 1 79.1%
March 2026 302 +25.8% 0 74.8%
February 2026 208 +2.0% 16 78.4%
January 2026 225 −3.0% 14 79.1%
December 2025 262 +9.6% 5 75.6%
November 2025 272 +21.4% 2 77.9%
October 2025 322 +87.2% 4 72.0%
September 2025 267 3 74.9%
August 2025 350 1 81.1%
July 2025 357 5 75.6%
June 2025 344 0 82.6%
May 2025 329 0 82.4%
April 2025 234 0 88.9%
March 2025 240 2 83.8%
February 2025 204 4 79.4%
January 2025 232 2 85.8%
December 2024 239 5 78.2%
November 2024 224 0 88.8%
October 2024 172 0 89.5%

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