Route
ISP → BWI
Long Island MacArthur Airport Baltimore/Washington International Thurgood Marshall Airport
How punctual is this route?
- On-time arrivals
- 85.1%
- Less than 15 minutes late
- Cancelled
- 1.5%
- Of scheduled flights
- Average delay when late
- 78 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,259
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 51%
- Airline (crew, maintenance, cleaning) 21%
- Air traffic control & airport 18%
- Extreme weather 10%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 95.6% | 90 |
| October 2025 | 89.2% | 93 |
| November 2025 | 87.5% | 90 |
| December 2025 | 77.4% | 93 |
| January 2026 | 87.6% | 93 |
| February 2026 | 85.9% | 84 |
| March 2026 | 76.7% | 90 |
| April 2026 | 89.6% | 106 |
| May 2026 | 93.9% | 114 |
| June 2026 | 83.3% | 139 |
| July 2026 | 73.8% | 146 |
| August 2026 | 85.1% | 121 |
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 | 1,259 | 85.1% | 1.5% | 78 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN2141
8% late · 60 flights
-
WN2143
29% late · 60 flights
-
WN2160
2% late · 58 flights
-
WN4874
13% late · 58 flights
-
WN2145
42% late · 57 flights
-
WN1873
16% late · 47 flights
-
WN207
13% late · 46 flights
-
WN4584
7% late · 43 flights
-
WN921
26% late · 43 flights
-
WN3077
8% late · 42 flights
-
WN3081
12% late · 42 flights
-
WN2029
10% late · 39 flights
-
WN993
18% late · 34 flights
-
WN1187
0% late · 33 flights
-
WN2939
34% late · 32 flights
-
WN3522
0% late · 31 flights
-
WN2450
32% late · 28 flights
-
WN1077
4% late · 24 flights
-
WN1257
8% late · 24 flights
-
WN3594
29% late · 24 flights
-
WN909
0% late · 24 flights
-
WN1744
43% late · 23 flights
-
WN1782
5% late · 21 flights
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