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3,111 km · International

Detroit Metropolitan Wayne County (DTW) – Luis Munoz Marin (SJU)

In July 2026, 62 flights operated between Detroit Metropolitan Wayne County and Luis Munoz Marin (both directions), and 87.1% 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
January7868▼ 12.8%
February6456▼ 12.5%
March7260▼ 16.7%
April6460▼ 6.3%
May62620.0%
June8359▼ 28.9%
July11562▼ 46.1%
August76––
September41––
October26–in progress
November51––
December85––
Year to date (Jan–Jul)538427▼ 20.6%

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
January84.6%66.2%▼ 21.7%
February79.7%94.6%▲ 18.7%
March87.5%83.3%▼ 4.8%
April95.3%90.0%▼ 5.6%
May85.5%91.9%▲ 7.5%
June85.5%83.1%▼ 2.8%
July86.1%87.1%▲ 1.2%
August88.2%––
September85.4%––
October88.5%–in progress
November76.5%––
December78.8%––
Year-to-date average (Jan–Jul)86.3%85.2%▼ 1.3%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January04–
February00–
March02–
April00–
May00–
June01–
July10▼ 100.0%
August0––
September0––
October0–in progress
November1––
December1––
Year to date (Jan–Jul)17▲ 600.0%

Airlines on this route

  1. Delta Air Lines 89.6%
  2. Spirit Airlines 10.4%

Oct 1, 2024 – Jul 31, 2026

By direction

DTW → SJU

Scheduled flights
695
Flights operated
692
Cancelled
3 · 0.4%
On-time departures
88.0%

SJU → DTW

Scheduled flights
695
Flights operated
687
Cancelled
8 · 1.2%
On-time departures
82.2%

DTW → SJU and SJU → DTW counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Delta Air Lines DL 1,246 89.6% 85.4% 10
Spirit Airlines NK 144 10.4% 82.5% 1

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 delay08:00–09:004.2min · 526 recorded · 525 measured
Gap to highest-delay hour11.7min08:00 ↔ 15:00
Recorded flights1,390DTW–SJU

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 · Fewer than 200 measured departures · 34 recorded · 34 measured · Source: the US BTS 02:00 · Fewer than 200 measured departures · 1 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 · Fewer than 200 measured departures · 15 recorded · 15 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 44 recorded · 44 measured · Source: the US BTS 08:00 · 89.3% · 526 recorded · 525 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 60 recorded · 59 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 45 recorded · 44 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 20 recorded · 20 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 41 recorded · 41 measured · Source: the US BTS 14:00 · 86.1% · 311 recorded · 309 measured · Source: the US BTS 15:00 · 78.0% · 235 recorded · 232 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 48 recorded · 46 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 1 recorded · 1 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 · Fewer than 200 measured departures · 34 recorded · 34 measured · Source: the US BTS 02:00 · Fewer than 200 measured departures · 1 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 · Fewer than 200 measured departures · 15 recorded · 15 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 44 recorded · 44 measured · Source: the US BTS 08:00 · 4.2 min · 526 recorded · 525 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 60 recorded · 59 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 45 recorded · 44 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 20 recorded · 20 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 41 recorded · 41 measured · Source: the US BTS 14:00 · 5.3 min · 311 recorded · 309 measured · Source: the US BTS 15:00 · 15.8 min · 235 recorded · 232 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 48 recorded · 46 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 1 recorded · 1 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 · 34 · 34 recorded · 34 measured · Source: the US BTS 02:00 · 1 · 1 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 · 15 · 15 recorded · 15 measured · Source: the US BTS 07:00 · 44 · 44 recorded · 44 measured · Source: the US BTS 08:00 · 526 · 526 recorded · 525 measured · Source: the US BTS 09:00 · 60 · 60 recorded · 59 measured · Source: the US BTS 10:00 · 45 · 45 recorded · 44 measured · Source: the US BTS 11:00 · 20 · 20 recorded · 20 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · 41 · 41 recorded · 41 measured · Source: the US BTS 14:00 · 311 · 311 recorded · 309 measured · Source: the US BTS 15:00 · 235 · 235 recorded · 232 measured · Source: the US BTS 16:00 · 48 · 48 recorded · 46 measured · Source: the US BTS 17:00 · 9 · 9 recorded · 9 measured · Source: the US BTS 18:00 · 1 · 1 recorded · 1 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———
01:00Fewer than 200 measured departures—3434
02:00Fewer than 200 measured departures—01
03:00No observations———
04:00No observations———
05:00No observations———
06:00Fewer than 200 measured departures—1515
07:00Fewer than 200 measured departures—4444
08:0089.3%4.2 min525526
09:00Fewer than 200 measured departures—5960
10:00Fewer than 200 measured departures—4445
11:00Fewer than 200 measured departures—2020
12:00No observations———
13:00Fewer than 200 measured departures—4141
14:0086.1%5.3 min309311
15:0078.0%15.8 min232235
16:00Fewer than 200 measured departures—4648
17:00Fewer than 200 measured departures—99
18:00Fewer than 200 measured departures—11
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 · 82.6% · 212 recorded · 212 measured · Source: the US BTS Tuesday · Fewer than 200 measured departures · 170 recorded · 169 measured · Source: the US BTS Wednesday · Fewer than 200 measured departures · 171 recorded · 170 measured · Source: the US BTS Thursday · Fewer than 200 measured departures · 193 recorded · 193 measured · Source: the US BTS Friday · 84.2% · 210 recorded · 209 measured · Source: the US BTS Saturday · 87.0% · 238 recorded · 231 measured · Source: the US BTS Sunday · Fewer than 200 measured departures · 196 recorded · 195 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 · 5.1 min · 212 recorded · 212 measured · Source: the US BTS Tuesday · Fewer than 200 measured departures · 170 recorded · 169 measured · Source: the US BTS Wednesday · Fewer than 200 measured departures · 171 recorded · 170 measured · Source: the US BTS Thursday · Fewer than 200 measured departures · 193 recorded · 193 measured · Source: the US BTS Friday · 11.0 min · 210 recorded · 209 measured · Source: the US BTS Saturday · 7.2 min · 238 recorded · 231 measured · Source: the US BTS Sunday · Fewer than 200 measured departures · 196 recorded · 195 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 · 212 · 212 recorded · 212 measured · Source: the US BTS Tuesday · 170 · 170 recorded · 169 measured · Source: the US BTS Wednesday · 171 · 171 recorded · 170 measured · Source: the US BTS Thursday · 193 · 193 recorded · 193 measured · Source: the US BTS Friday · 210 · 210 recorded · 209 measured · Source: the US BTS Saturday · 238 · 238 recorded · 231 measured · Source: the US BTS Sunday · 196 · 196 recorded · 195 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
Monday82.6%5.1 min212212
TuesdayFewer than 200 measured departures—169170
WednesdayFewer than 200 measured departures—170171
ThursdayFewer than 200 measured departures—193193
Friday84.2%11.0 min209210
Saturday87.0%7.2 min231238
SundayFewer than 200 measured departures—195196

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 · 150 · 150 recorded · 146 measured · Source: the US BTS Feb · 120 · 120 recorded · 120 measured · Source: the US BTS Mar · 134 · 134 recorded · 132 measured · Source: the US BTS Apr · 124 · 124 recorded · 124 measured · Source: the US BTS May · 124 · 124 recorded · 124 measured · Source: the US BTS Jun · 143 · 143 recorded · 142 measured · Source: the US BTS Jul · 178 · 178 recorded · 177 measured · Source: the US BTS Aug · 76 · 76 recorded · 76 measured · Source: the US BTS Sep · 41 · 41 recorded · 41 measured · Source: the US BTS Oct · 32 · 32 recorded · 32 measured · Source: the US BTS Nov · 94 · 94 recorded · 93 measured · Source: the US BTS Dec · 174 · 174 recorded · 172 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—146150
FebFewer than 200 measured departures—120120
MarFewer than 200 measured departures—132134
AprFewer than 200 measured departures—124124
MayFewer than 200 measured departures—124124
JunFewer than 200 measured departures—142143
JulFewer than 200 measured departures—177178
AugFewer than 200 measured departures—7676
SepFewer than 200 measured departures—4141
OctFewer than 200 measured departures—3232
NovFewer than 200 measured departures—9394
DecFewer than 200 measured departures—172174

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 84.5% 1,174
  • Delayed >15 min 14.7% 205
  • Cancelled 0.8% 11
  • 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

4
Flight numbersBy direction DeparturesOn time
DL1913 SJU → DTW 574 83.3%
DL1913 DTW → SJU 574 89.0%
NK1543 DTW → SJU 35 82.9%
NK1546 SJU → DTW 35 85.3%

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 −46.1% 0 87.1%
June 2026 59 −28.9% 1 83.1%
May 2026 62 +0.0% 0 91.9%
April 2026 60 −6.3% 0 90.0%
March 2026 60 −16.7% 2 83.3%
February 2026 56 −12.5% 0 94.6%
January 2026 68 −12.8% 4 66.2%
December 2025 85 −2.3% 1 78.8%
November 2025 51 +21.4% 1 76.5%
October 2025 26 +333.3% 0 88.5%
September 2025 41 0 85.4%
August 2025 76 0 88.2%
July 2025 115 1 86.1%
June 2025 83 0 85.5%
May 2025 62 0 85.5%
April 2025 64 0 95.3%
March 2025 72 0 87.5%
February 2025 64 0 79.7%
January 2025 78 0 84.6%
December 2024 87 1 82.8%
November 2024 42 0 95.2%
October 2024 6 0 83.3%

How to read this chart

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