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109 km · International

Luis Munoz Marin (SJU) – Cyril E. King (STT)

In July 2026, 74 flights operated between Luis Munoz Marin and Cyril E. King (both directions), and 64.9% 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
January8092▲ 15.0%
February6981▲ 17.4%
March8093▲ 16.3%
April8188▲ 8.6%
May67670.0%
June6470▲ 9.4%
July8274▼ 9.8%
August76––
September44––
October52–in progress
November72––
December82––
Year to date (Jan–Jul)523565▲ 8.0%

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
January68.8%57.6%▼ 16.3%
February68.1%63.0%▼ 7.5%
March88.8%77.4%▼ 12.8%
April82.7%86.4%▲ 4.5%
May89.6%92.5%▲ 3.2%
June82.8%71.4%▼ 13.8%
July65.9%64.9%▼ 1.5%
August63.2%––
September61.4%––
October84.6%–in progress
November77.8%––
December70.7%––
Year-to-date average (Jan–Jul)78.1%73.3%▼ 6.1%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January06–
February14▲ 300.0%
March00–
April00–
May00–
June00–
July01–
August3––
September0––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)111▲ 1,000.0%

Airlines on this route

  1. JetBlue Airways 98.3%
  2. Frontier Airlines 1.7%

Oct 1, 2024 – Jul 31, 2026

By direction

SJU → STT

Scheduled flights
672
Flights operated
670
Cancelled
2 · 0.3%
On-time departures
74.3%

STT → SJU

Scheduled flights
988
Flights operated
975
Cancelled
13 · 1.3%
On-time departures
75.3%

SJU → STT and STT → SJU counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
JetBlue Airways B6 1,632 98.3% 75.6% 15
Frontier Airlines F9 28 1.7% 35.7% 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 delay15:00–16:0011.9min · 336 recorded · 333 measured
Gap to highest-delay hour7.2min15:00 ↔ 14:00
Recorded flights1,660SJU–STT

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 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 55 recorded · 55 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 184 recorded · 182 measured · Source: the US BTS 13:00 · 71.7% · 306 recorded · 304 measured · Source: the US BTS 14:00 · 70.8% · 496 recorded · 489 measured · Source: the US BTS 15:00 · 79.3% · 336 recorded · 333 measured · Source: the US BTS 16:00 · 76.7% · 263 recorded · 262 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 20 recorded · 20 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 55 recorded · 55 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 184 recorded · 182 measured · Source: the US BTS 13:00 · 14.0 min · 306 recorded · 304 measured · Source: the US BTS 14:00 · 19.2 min · 496 recorded · 489 measured · Source: the US BTS 15:00 · 11.9 min · 336 recorded · 333 measured · Source: the US BTS 16:00 · 14.0 min · 263 recorded · 262 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 20 recorded · 20 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · 55 · 55 recorded · 55 measured · Source: the US BTS 12:00 · 184 · 184 recorded · 182 measured · Source: the US BTS 13:00 · 306 · 306 recorded · 304 measured · Source: the US BTS 14:00 · 496 · 496 recorded · 489 measured · Source: the US BTS 15:00 · 336 · 336 recorded · 333 measured · Source: the US BTS 16:00 · 263 · 263 recorded · 262 measured · Source: the US BTS 17:00 · 20 · 20 recorded · 20 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———
07:00No observations———
08:00No observations———
09:00No observations———
10:00No observations———
11:00Fewer than 200 measured departures—5555
12:00Fewer than 200 measured departures—182184
13:0071.7%14.0 min304306
14:0070.8%19.2 min489496
15:0079.3%11.9 min333336
16:0076.7%14.0 min262263
17:00Fewer than 200 measured departures—2020
18:00No observations———
19:00No observations———
20:00No observations———
21:00No observations———
22:00No observations———
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 66.8% · 228 recorded · 226 measured · Source: the US BTS Tuesday · 85.2% · 231 recorded · 230 measured · Source: the US BTS Wednesday · Fewer than 200 measured departures · 196 recorded · 196 measured · Source: the US BTS Thursday · 72.8% · 235 recorded · 235 measured · Source: the US BTS Friday · 79.8% · 243 recorded · 243 measured · Source: the US BTS Saturday · 70.7% · 302 recorded · 293 measured · Source: the US BTS Sunday · 72.1% · 225 recorded · 222 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 · 31.1 min · 228 recorded · 226 measured · Source: the US BTS Tuesday · 6.2 min · 231 recorded · 230 measured · Source: the US BTS Wednesday · Fewer than 200 measured departures · 196 recorded · 196 measured · Source: the US BTS Thursday · 16.0 min · 235 recorded · 235 measured · Source: the US BTS Friday · 12.1 min · 243 recorded · 243 measured · Source: the US BTS Saturday · 18.1 min · 302 recorded · 293 measured · Source: the US BTS Sunday · 12.5 min · 225 recorded · 222 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 · 228 · 228 recorded · 226 measured · Source: the US BTS Tuesday · 231 · 231 recorded · 230 measured · Source: the US BTS Wednesday · 196 · 196 recorded · 196 measured · Source: the US BTS Thursday · 235 · 235 recorded · 235 measured · Source: the US BTS Friday · 243 · 243 recorded · 243 measured · Source: the US BTS Saturday · 302 · 302 recorded · 293 measured · Source: the US BTS Sunday · 225 · 225 recorded · 222 measured · Source: the US BTS

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

View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday66.8%31.1 min226228
Tuesday85.2%6.2 min230231
WednesdayFewer than 200 measured departures—196196
Thursday72.8%16.0 min235235
Friday79.8%12.1 min243243
Saturday70.7%18.1 min293302
Sunday72.1%12.5 min222225

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 · 178 · 178 recorded · 172 measured · Source: the US BTS Feb · 155 · 155 recorded · 150 measured · Source: the US BTS Mar · 173 · 173 recorded · 173 measured · Source: the US BTS Apr · 169 · 169 recorded · 169 measured · Source: the US BTS May · 134 · 134 recorded · 134 measured · Source: the US BTS Jun · 134 · 134 recorded · 134 measured · Source: the US BTS Jul · 157 · 157 recorded · 156 measured · Source: the US BTS Aug · 79 · 79 recorded · 76 measured · Source: the US BTS Sep · 44 · 44 recorded · 44 measured · Source: the US BTS Oct · 127 · 127 recorded · 127 measured · Source: the US BTS Nov · 143 · 143 recorded · 143 measured · Source: the US BTS Dec · 167 · 167 recorded · 167 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—172178
FebFewer than 200 measured departures—150155
MarFewer than 200 measured departures—173173
AprFewer than 200 measured departures—169169
MayFewer than 200 measured departures—134134
JunFewer than 200 measured departures—134134
JulFewer than 200 measured departures—156157
AugFewer than 200 measured departures—7679
SepFewer than 200 measured departures—4444
OctFewer than 200 measured departures—127127
NovFewer than 200 measured departures—143143
DecFewer than 200 measured departures—167167

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 74.2% 1,232
  • Delayed >15 min 24.9% 413
  • Cancelled 0.9% 15
  • 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
B661036 SJU → STT 384 76.0%
B661135 STT → SJU 384 75.6%
B66435 STT → SJU 273 78.7%
B66936 SJU → STT 273 73.9%
B66808 STT → SJU 266 76.1%
B66908 STT → SJU 50 60.4%

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 74 −9.8% 1 64.9%
June 2026 70 +9.4% 0 71.4%
May 2026 67 +0.0% 0 92.5%
April 2026 88 +8.6% 0 86.4%
March 2026 93 +16.3% 0 77.4%
February 2026 81 +17.4% 4 63.0%
January 2026 92 +15.0% 6 57.6%
December 2025 82 −3.5% 0 70.7%
November 2025 72 +1.4% 0 77.8%
October 2025 52 −30.7% 0 84.6%
September 2025 44 0 61.4%
August 2025 76 3 63.2%
July 2025 82 0 65.9%
June 2025 64 0 82.8%
May 2025 67 0 89.6%
April 2025 81 0 82.7%
March 2025 80 0 88.8%
February 2025 69 1 68.1%
January 2025 80 0 68.8%
December 2024 85 0 78.8%
November 2024 71 0 77.5%
October 2024 75 0 77.3%

How to read this chart

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