Route · SJU → DTW · 2020–2025 BTS data
San Juan to Detroit
The SJU–DTW corridor (San Juan, PR → Detroit, MI) runs ahead of the national average, served by 4 carriers across roughly 1,930 miles.
Data updated 2026-06-13
- 83.4%
- On-time
- +4.4 pts
- vs US avg
- 82 min
- Delay when late
- 1,079
- Flights
Cancelled
0.5%
Best Month
May 2023 92%
Worst Month
Jun 2023 73%
Distance
1,930 mi
Carriers
4
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 43 | 10 | 1 | 0 | DL |
| Aug 2025 | 38 | 11 | 0 | 0 | NK,DL |
| Jul 2025 | 58 | 5 | 1 | 0 | DL,NK |
| Jun 2025 | 42 | 5 | 0 | 0 | NK,DL |
| May 2025 | 31 | 3 | 0 | 0 | DL |
| Apr 2025 | 32 | 2 | 0 | 0 | DL |
| Mar 2025 | 36 | 5 | 0 | 0 | DL |
| Feb 2025 | 32 | 8 | 0 | 0 | DL |
| Jan 2025 | 39 | 14 | 0 | 1 | DL |
| Dec 2024 | 44 | 11 | 1 | 1 | DL |
| Aug 2024 | 31 | 7 | 0 | 0 | DL |
| Jul 2024 | 31 | 4 | 0 | 0 | DL |
| Jun 2024 | 30 | 5 | 0 | 0 | DL |
| May 2024 | 30 | 8 | 1 | 1 | DL |
| Mar 2024 | 36 | 10 | 0 | 0 | DL |
| Feb 2024 | 33 | 5 | 0 | 0 | DL |
| Jan 2024 | 34 | 7 | 0 | 0 | DL |
| Dec 2023 | 31 | 0 | 0 | 0 | DL |
| Oct 2023 | 31 | 3 | 0 | 0 | DL |
| Sep 2023 | 36 | 2 | 0 | 0 | DL,NK |
| Aug 2023 | 62 | 11 | 0 | 2 | DL,NK |
| Jul 2023 | 64 | 16 | 0 | 0 | DL,F9,NK |
| Jun 2023 | 77 | 21 | 1 | 0 | DL,F9,NK |
| May 2023 | 66 | 5 | 0 | 0 | DL,F9,NK |
Cancellation Rate
0.5%
5 of 987 flights
Diversion Rate
0.5%
5 of 987 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SJU - San Juan
Full on-time, delay-cause, and seasonal performance for San Juan, PR.
Origin airport →DTW - Detroit
Full on-time, delay-cause, and seasonal performance for Detroit, MI.
Destination airport →Compare the two airports
See SJU and DTW side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SJU–DTW.
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What the Data Says About SJU to DTW
Bureau of Transportation Statistics records show San Juan to Detroit (SJU to DTW) running a 83.4% on-time rate over 1,079 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 81.6 minutes. The 1,930-mile corridor is served by 4 carriers, and over the last 24 months 0.5% of 987 flights were cancelled, 0.5% diverted.
The monthly split is wide on this route: May 2023 posted the strongest performance at 92% on-time, while Jun 2023 came in at just 73% - a 20-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.