Route · BWI → SJU · 2020–2025 BTS data
Baltimore to San Juan
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BWI to SJU (Baltimore to San Juan) ranks #1779 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 71.5%
- On-time
- -7.5 pts
- vs US avg
- 66 min
- Delay when late
- 7,106
- Flights
- #1779 of 4927
- Corpus placement
Cancelled
1.2%
Best Month
Oct 2024 81%
Worst Month
Aug 2024 52%
Distance
1,565 mi
Carriers
7
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 115 | 44 | 1 | 0 | WN,F9,NK |
| Nov 2025 | 75 | 22 | 1 | 0 | F9,NK,WN |
| Oct 2025 | 61 | 16 | 0 | 0 | WN,NK |
| Sep 2025 | 70 | 16 | 0 | 0 | WN,NK,F9 |
| Aug 2025 | 103 | 42 | 1 | 0 | WN,F9,NK |
| Jul 2025 | 141 | 60 | 5 | 0 | WN,F9,NK |
| Jun 2025 | 134 | 43 | 0 | 0 | WN,F9,NK |
| May 2025 | 113 | 41 | 0 | 0 | NK,WN,F9 |
| Apr 2025 | 142 | 35 | 0 | 1 | F9,NK,WN |
| Mar 2025 | 142 | 33 | 0 | 0 | WN,F9,NK |
| Feb 2025 | 90 | 23 | 1 | 0 | WN,F9,NK |
| Jan 2025 | 101 | 19 | 4 | 1 | NK,WN,F9 |
| Dec 2024 | 132 | 36 | 1 | 0 | F9,NK,WN |
| Nov 2024 | 97 | 18 | 0 | 0 | NK,WN,F9 |
| Oct 2024 | 54 | 10 | 0 | 2 | WN,NK |
| Sep 2024 | 64 | 17 | 0 | 0 | WN,F9,NK |
| Aug 2024 | 106 | 51 | 5 | 0 | F9,NK,WN |
| Jul 2024 | 124 | 54 | 4 | 0 | F9,NK,WN |
| Jun 2024 | 123 | 35 | 2 | 0 | F9,NK,WN |
| May 2024 | 122 | 35 | 2 | 0 | F9,NK,WN |
| Apr 2024 | 137 | 26 | 1 | 1 | F9,NK,WN |
| Mar 2024 | 128 | 45 | 1 | 0 | NK,WN |
| Feb 2024 | 108 | 23 | 1 | 0 | F9,NK,WN |
| Jan 2024 | 139 | 49 | 2 | 0 | F9,NK,WN |
BWI–SJU seasonal on-time pattern
Best: February (77.8%) · weakest: July (56.7%)
Strongest calendar month
February
77.8% on-time · ~86 flights/mo
Busiest calendar month
July
~119 flights/mo avg
Weakest calendar month
July
56.7% on-time · ~119 flights/mo
Cancellation Rate
1.2%
32 of 2,621 flights
Diversion Rate
0.2%
5 of 2,621 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BWI - Baltimore
Full on-time, delay-cause, and seasonal performance for Baltimore, MD.
BWI on-time profileSJU - San Juan
Full on-time, delay-cause, and seasonal performance for San Juan, PR.
SJU on-time profileCompare the two airports
See BWI and SJU side by side on delays, cancellations, and reliability.
Compare BWI vs SJUOrigin-hub reliability standing
Softer reliability from BWI
Among 64 routes leaving BWI, only 11 (including this one) clear below 75% on-time, while 0 stay ≥85% and 53 sit mid-band. Travelers comparing BWI options should weigh this 71.5% print against those peers · fleet on-time rank #4782 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to BWI–SJU.
Routes with a similar on-time rate
What the Data Says About BWI to SJU
On-time performance on the BWI to SJU pairing (Baltimore to San Juan) trails a chunk of the network: 71.5% of 7,106 tracked flights arrived on schedule, with a 65.5-minute average delay on the ones that ran late. The route spans about 1,565 miles across 7 carriers. Cancellations over the trailing 24 months hit 1.2% (32 of 2,621 flights), with 0.2% diverted.
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 81% on-time, while Aug 2024 came in at just 52% - a 30-point swing worth factoring into travel timing.
On the multi-year calendar, BWI–SJU peaks in February at 77.8% on-time while July carries the heaviest traffic (~119 flights per month) ; the softest month is July at 56.7%, a 21.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does BWI to SJU rank among US routes by traffic? ▼
How often are flights delayed from BWI to SJU? ▼
What is the cancellation rate for BWI to SJU? ▼
How far is the flight from BWI to SJU? ▼
When is the best time to fly from BWI to SJU? ▼
Airports on this route
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.
Using BWI–SJU data
BWI–SJU sits 7.5 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.
- Compare BWI and SJU airport profiles: delay causes and top routes differ even on the same corridor. BWI airport
- If your dates flex, February (77.8% on-time) beats July (56.7%) on this corridor. Seasonal chart
- 4 other routes post a similar 71.5% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.