Route
BUF → BWI
Buffalo Niagara International Airport Baltimore/Washington International Thurgood Marshall Airport
How punctual is this route?
- On-time arrivals
- 87.0%
- Less than 15 minutes late
- Cancelled
- 1.5%
- Of scheduled flights
- Average delay when late
- 61 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,728
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 47%
- Airline (crew, maintenance, cleaning) 37%
- Air traffic control & airport 15%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 93.2% | 147 |
| October 2025 | 83.2% | 149 |
| November 2025 | 87.5% | 144 |
| December 2025 | 84.2% | 152 |
| January 2026 | 86.9% | 128 |
| February 2026 | 92.0% | 131 |
| March 2026 | 83.8% | 145 |
| April 2026 | 90.5% | 148 |
| May 2026 | 87.6% | 154 |
| June 2026 | 85.8% | 150 |
| July 2026 | 82.7% | 154 |
| August 2026 | 87.0% | 126 |
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 | 1,728 | 87.0% | 1.5% | 61 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN756
6% late · 89 flights
-
WN758
9% late · 68 flights
-
WN692
6% late · 63 flights
-
WN757
17% late · 60 flights
-
WN4923
7% late · 58 flights
-
WN914
0% late · 58 flights
-
WN920
11% late · 57 flights
-
WN1339
17% late · 50 flights
-
WN694
14% late · 50 flights
-
WN921
8% late · 50 flights
-
WN1308
11% late · 45 flights
-
WN958
36% late · 43 flights
-
WN1448
5% late · 39 flights
-
WN1453
18% late · 34 flights
-
WN1272
6% late · 33 flights
-
WN924
34% late · 32 flights
-
WN1461
16% late · 31 flights
-
WN2257
10% late · 31 flights
-
WN4767
0% late · 31 flights
-
WN102
37% late · 30 flights
-
WN1499
3% late · 30 flights
-
WN1500
10% late · 29 flights
-
WN1165
11% late · 28 flights
-
WN1268
7% late · 28 flights
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