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2,835 km · Domestic

Boston Logan (BOS) – San Antonio (SAT)

In July 2026, 62 flights operated between Boston Logan and San Antonio (both directions), and 59.7% 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
January5256▲ 7.7%
February4454▲ 22.7%
March5262▲ 19.2%
April5258▲ 11.5%
May6160▼ 1.6%
June5856▼ 3.4%
July6062▲ 3.3%
August60––
September60––
October60–in progress
November54––
December54––
Year to date (Jan–Jul)379408▲ 7.7%

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
January80.8%78.6%▼ 2.7%
February84.1%77.8%▼ 7.5%
March78.8%87.1%▲ 10.5%
April82.7%81.0%▼ 2.1%
May65.6%76.7%▲ 16.9%
June72.4%71.4%▼ 1.4%
July78.3%59.7%▼ 23.8%
August81.7%––
September61.7%––
October58.3%–in progress
November79.6%––
December74.1%––
Year-to-date average (Jan–Jul)77.5%76.0%▼ 1.9%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January02–
February02–
March00–
April02–
May12▲ 100.0%
June24▲ 100.0%
July00–
August0––
September0––
October0–in progress
November2––
December2––
Year to date (Jan–Jul)312▲ 300.0%

Airlines on this route

  1. Delta Air Lines 97.5%
  2. JetBlue Airways 2.5%

Oct 1, 2024 – Jul 31, 2026

By direction

BOS → SAT

Scheduled flights
608
Flights operated
598
Cancelled
10 · 1.6%
On-time departures
83.9%

SAT → BOS

Scheduled flights
608
Flights operated
597
Cancelled
11 · 1.8%
On-time departures
66.8%

BOS → SAT and SAT → BOS counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Delta Air Lines DL 1,186 97.5% 75.3% 21
JetBlue Airways B6 30 2.5% 80.0% 0

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 delay12:00–13:007.6min · 251 recorded · 249 measured
Gap to highest-delay hour15.3min12:00 ↔ 14:00
Recorded flights1,216BOS–SAT

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 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 14 recorded · 14 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 25 recorded · 24 measured · Source: the US BTS 09:00 · 80.2% · 333 recorded · 328 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 72 recorded · 71 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 80 recorded · 77 measured · Source: the US BTS 12:00 · 81.5% · 251 recorded · 249 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 141 recorded · 138 measured · Source: the US BTS 14:00 · 65.5% · 237 recorded · 235 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 53 recorded · 50 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 4 recorded · 3 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 6 recorded · 6 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 14 recorded · 14 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 25 recorded · 24 measured · Source: the US BTS 09:00 · 15.4 min · 333 recorded · 328 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 72 recorded · 71 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 80 recorded · 77 measured · Source: the US BTS 12:00 · 7.6 min · 251 recorded · 249 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 141 recorded · 138 measured · Source: the US BTS 14:00 · 22.9 min · 237 recorded · 235 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 53 recorded · 50 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 4 recorded · 3 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 6 recorded · 6 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 14 · 14 recorded · 14 measured · Source: the US BTS 08:00 · 25 · 25 recorded · 24 measured · Source: the US BTS 09:00 · 333 · 333 recorded · 328 measured · Source: the US BTS 10:00 · 72 · 72 recorded · 71 measured · Source: the US BTS 11:00 · 80 · 80 recorded · 77 measured · Source: the US BTS 12:00 · 251 · 251 recorded · 249 measured · Source: the US BTS 13:00 · 141 · 141 recorded · 138 measured · Source: the US BTS 14:00 · 237 · 237 recorded · 235 measured · Source: the US BTS 15:00 · 53 · 53 recorded · 50 measured · Source: the US BTS 16:00 · 4 · 4 recorded · 3 measured · Source: the US BTS 17:00 · 6 · 6 recorded · 6 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 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.

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———
06:00No observations———
07:00Fewer than 200 measured departures—1414
08:00Fewer than 200 measured departures—2425
09:0080.2%15.4 min328333
10:00Fewer than 200 measured departures—7172
11:00Fewer than 200 measured departures—7780
12:0081.5%7.6 min249251
13:00Fewer than 200 measured departures—138141
14:0065.5%22.9 min235237
15:00Fewer than 200 measured departures—5053
16:00Fewer than 200 measured departures—34
17:00Fewer than 200 measured departures—66
18:00No observations———
19:00No observations———
20:00No observations———
21:00No observations———
22:00No observations———
23:00No observations———

Day of week

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 184 · 184 recorded · 175 measured · Source: the US BTS Tuesday · 180 · 180 recorded · 180 measured · Source: the US BTS Wednesday · 180 · 180 recorded · 178 measured · Source: the US BTS Thursday · 176 · 176 recorded · 173 measured · Source: the US BTS Friday · 176 · 176 recorded · 174 measured · Source: the US BTS Saturday · 146 · 146 recorded · 145 measured · Source: the US BTS Sunday · 174 · 174 recorded · 170 measured · Source: the US BTS

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

No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.

View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
MondayFewer than 200 measured departures—175184
TuesdayFewer than 200 measured departures—180180
WednesdayFewer than 200 measured departures—178180
ThursdayFewer than 200 measured departures—173176
FridayFewer than 200 measured departures—174176
SaturdayFewer than 200 measured departures—145146
SundayFewer than 200 measured departures—170174

Month of year

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

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 110 · 110 recorded · 108 measured · Source: the US BTS Feb · 100 · 100 recorded · 98 measured · Source: the US BTS Mar · 114 · 114 recorded · 114 measured · Source: the US BTS Apr · 112 · 112 recorded · 110 measured · Source: the US BTS May · 124 · 124 recorded · 121 measured · Source: the US BTS Jun · 120 · 120 recorded · 114 measured · Source: the US BTS Jul · 122 · 122 recorded · 122 measured · Source: the US BTS Aug · 60 · 60 recorded · 60 measured · Source: the US BTS Sep · 60 · 60 recorded · 60 measured · Source: the US BTS Oct · 90 · 90 recorded · 90 measured · Source: the US BTS Nov · 92 · 92 recorded · 90 measured · Source: the US BTS Dec · 112 · 112 recorded · 108 measured · Source: the US BTS

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

No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.

View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—108110
FebFewer than 200 measured departures—98100
MarFewer than 200 measured departures—114114
AprFewer than 200 measured departures—110112
MayFewer than 200 measured departures—121124
JunFewer than 200 measured departures—114120
JulFewer than 200 measured departures—122122
AugFewer than 200 measured departures—6060
SepFewer than 200 measured departures—6060
OctFewer than 200 measured departures—9090
NovFewer than 200 measured departures—9092
DecFewer than 200 measured departures—108112

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 74.1% 901
  • Delayed >15 min 24.2% 294
  • Cancelled 1.7% 21
  • 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

6
Flight numbersBy direction DeparturesOn time
DL2652 BOS → SAT 502 84.4%
DL816 SAT → BOS 501 66.5%
DL816 BOS → SAT 55 71.7%
DL1289 BOS → SAT 36 91.7%
DL2029 SAT → BOS 36 72.2%
DL2645 SAT → BOS 31 63.3%

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 62 +3.3% 0 59.7%
June 2026 56 −3.4% 4 71.4%
May 2026 60 −1.6% 2 76.7%
April 2026 58 +11.5% 2 81.0%
March 2026 62 +19.2% 0 87.1%
February 2026 54 +22.7% 2 77.8%
January 2026 56 +7.7% 2 78.6%
December 2025 54 +0.0% 2 74.1%
November 2025 54 +50.0% 2 79.6%
October 2025 60 +100.0% 0 58.3%
September 2025 60 0 61.7%
August 2025 60 0 81.7%
July 2025 60 0 78.3%
June 2025 58 2 72.4%
May 2025 61 1 65.6%
April 2025 52 0 82.7%
March 2025 52 0 78.8%
February 2025 44 0 84.1%
January 2025 52 0 80.8%
December 2024 54 2 79.6%
November 2024 36 0 77.8%
October 2024 30 0 80.0%

How to read this chart

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