Route
BWI → SJU
Baltimore/Washington International Thurgood Marshall Airport Luis Munoz Marin International Airport
How punctual is this route?
- On-time arrivals
- 67.8%
- Less than 15 minutes late
- Cancelled
- 2.5%
- Of scheduled flights
- Average delay when late
- 70 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,150
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 37%
- Air traffic control & airport 31%
- Late-arriving aircraft 28%
- Extreme weather 4%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 77.1% | 70 |
| October 2025 | 73.8% | 61 |
| November 2025 | 70.3% | 75 |
| December 2025 | 61.4% | 115 |
| January 2026 | 68.8% | 108 |
| February 2026 | 67.8% | 91 |
| March 2026 | 71.4% | 109 |
| April 2026 | 73.6% | 111 |
| May 2026 | 70.0% | 90 |
| June 2026 | 62.0% | 109 |
| July 2026 | 57.3% | 120 |
| August 2026 | 68.5% | 91 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 812 | 67.1% | 0.9% | 59 min |
| Frontier Airlines | 184 | 62.8% | 6.5% | 110 min |
| NK | 154 | 77.8% | 6.5% | 81 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
F92266
41% late · 126 flights
-
WN4443
28% late · 101 flights
-
NK3011
21% late · 87 flights
-
WN1104
57% late · 60 flights
-
WN1053
33% late · 58 flights
-
WN1935
22% late · 58 flights
-
WN1103
43% late · 51 flights
-
WN1898
26% late · 47 flights
-
WN3525
35% late · 46 flights
-
WN3687
41% late · 46 flights
-
F91774
29% late · 44 flights
-
WN1769
30% late · 33 flights
-
WN2522
45% late · 33 flights
-
NK312
34% late · 30 flights
-
WN1090
54% late · 28 flights
-
WN1947
26% late · 27 flights
-
WN2802
22% late · 27 flights
-
WN986
15% late · 27 flights
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