Route · DTW → SJU · 2020–2025 BTS data
Detroit to San Juan
The DTW–SJU corridor (Detroit, MI → San Juan, PR) runs ahead of the national average, served by 4 carriers across roughly 1,930 miles.
Data updated 2026-06-13
- 80.4%
- On-time
- +1.4 pts
- vs US avg
- 59 min
- Delay when late
- 1,046
- Flights
Cancelled
0.0%
Best Month
Jul 2025 79%
Worst Month
Jun 2023 69%
Distance
1,930 mi
Carriers
4
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 43 | 16 | 0 | 0 | DL |
| Aug 2025 | 38 | 6 | 0 | 0 | NK,DL |
| Jul 2025 | 58 | 12 | 0 | 0 | DL,NK |
| Jun 2025 | 41 | 6 | 0 | 0 | NK,DL |
| May 2025 | 31 | 6 | 0 | 0 | DL |
| Apr 2025 | 32 | 7 | 0 | 0 | DL |
| Mar 2025 | 36 | 6 | 0 | 0 | DL |
| Feb 2025 | 32 | 8 | 0 | 0 | DL |
| Jan 2025 | 39 | 15 | 0 | 1 | DL |
| Dec 2024 | 44 | 11 | 0 | 0 | DL |
| Aug 2024 | 31 | 4 | 0 | 1 | DL |
| Jul 2024 | 31 | 7 | 0 | 0 | DL |
| Jun 2024 | 30 | 2 | 0 | 0 | DL |
| May 2024 | 30 | 7 | 0 | 1 | DL |
| Mar 2024 | 36 | 3 | 0 | 0 | DL |
| Feb 2024 | 33 | 3 | 0 | 0 | DL |
| Jan 2024 | 34 | 11 | 0 | 0 | DL |
| Dec 2023 | 31 | 0 | 0 | 0 | DL |
| Oct 2023 | 31 | 2 | 0 | 0 | DL |
| Sep 2023 | 35 | 4 | 0 | 0 | DL,NK |
| Aug 2023 | 62 | 14 | 0 | 1 | DL,NK |
| Jul 2023 | 64 | 14 | 0 | 0 | DL,F9,NK |
| Jun 2023 | 77 | 24 | 0 | 0 | DL,F9,NK |
| May 2023 | 66 | 14 | 0 | 0 | DL,F9,NK |
Cancellation Rate
0.0%
0 of 985 flights
Diversion Rate
0.4%
4 of 985 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
DTW - Detroit
Full on-time, delay-cause, and seasonal performance for Detroit, MI.
Origin airport →SJU - San Juan
Full on-time, delay-cause, and seasonal performance for San Juan, PR.
Destination airport →Compare the two airports
See DTW and SJU side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to DTW–SJU.
Routes with a similar on-time rate
What the Data Says About DTW to SJU
1,046 tracked flights put the DTW to SJU pairing (Detroit to San Juan) at a 80.4% on-time rate, squarely in line with the wider network. Delays that do occur run 58.6 minutes on average. Across the 1,930-mile route and its 4 carriers, the trailing 24 months show 0.0% cancelled and 0.4% diverted (985 flights sampled).
Monthly performance varies moderately here: Jul 2025 was the strongest month at 79% on-time versus Jun 2023 at 69%, a 11-point difference.
Frequently Asked Questions
How often are flights delayed from DTW to SJU? ▼
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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.