Airports › Buffalo (BUF) › May 2025
Airport month · May 2025
Buffalo Niagara International in May 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In May 2025, reporting carriers scheduled 1,899 domestic departures from Buffalo Niagara International (BUF). 81.8% left less than 15 minutes late and 81.5% reached their destination on time; 0.6% were cancelled.
Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so BUF departures were 5.1 points above the national departure figure.
A year earlier, in May 2024, the airport had 1,878 departures with 79.8% leaving on time: a change of +2.0 points, with flights up 1%.
Flights arriving at BUF that month were on time 75.3% of the time (1,901 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, national aviation system 30% and air carrier 26%.
- On time 81.5%
- Arrived 15+ minutes late 17.8%
- Cancelled 0.6%
- Diverted 0.1%
May 2025 against a year earlier, the airport's year and the nation
| Measure | May 2025 | May 2024 | BUF, 12 months to Jul 2026 | All reported flights, May 2025 |
|---|---|---|---|---|
| Departed on time | 81.8% | 79.8% | 75.6% | 76.7% |
| Arrived on time | 81.5% | 79.1% | 75.5% | 75.4% |
| Cancelled | 0.6% | 1.0% | 2.6% | 1.0% |
| Average departure delay (late minutes only) | 13.2 min | 16.7 min | 18.8 min | 17.5 min |
| Scheduled departures a day | 63 | 63 | 57 | 20,188 |
| Scheduled departures | 1,899 | 1,878 | 20,726 | 605,648 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| WN Southwest Airlines | 558 | 29% | 84.6% | 1.3 min | 0.0% |
| B6 JetBlue Airways | 321 | 17% | 80.1% | 5.5 min | 0.0% |
| YX Republic Airline | 288 | 15% | 80.9% | 7.7 min | 1.0% |
| DL Delta Air Lines | 167 | 9% | 82.6% | 6.8 min | 0.0% |
| AA American Airlines | 148 | 8% | 77.7% | 11.2 min | 1.4% |
| MQ Envoy Air | 139 | 7% | 85.6% | -1.9 min | 0.7% |
| UA United Airlines | 93 | 5% | 86.0% | 2.4 min | 0.0% |
| F9 Frontier Airlines | 79 | 4% | 79.7% | 6.9 min | 0.0% |
| OH PSA Airlines | 65 | 3% | 52.3% | 21.8 min | 7.7% |
| OO SkyWest Airlines | 41 | 2% | 90.2% | -3.2 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| BUF–ORD | Buffalo to Chicago | 231 | 87.0% | 1.0 min | 0.0% |
| BUF–MCO | Buffalo to Orlando | 184 | 83.2% | 3.3 min | 0.0% |
| BUF–LGA | Buffalo to New York | 159 | 80.5% | 6.8 min | 1.9% |
| BUF–BWI | Buffalo to Baltimore | 146 | 85.6% | -1.5 min | 0.0% |
| BUF–JFK | Buffalo to New York | 121 | 75.2% | 12.2 min | 0.0% |
| BUF–DCA | Buffalo to Washington | 119 | 63.9% | 12.7 min | 5.0% |
| BUF–DTW | Buffalo to Detroit | 116 | 92.2% | -5.5 min | 0.0% |
| BUF–ATL | Buffalo to Atlanta | 107 | 72.0% | 18.5 min | 0.0% |
| BUF–CLT | Buffalo to Charlotte | 93 | 82.8% | 4.4 min | 0.0% |
| BUF–TPA | Buffalo to Tampa | 88 | 89.8% | 4.5 min | 0.0% |
| BUF–BOS | Buffalo to Boston | 86 | 70.9% | 11.5 min | 0.0% |
| BUF–MDW | Buffalo to Chicago | 57 | 87.7% | 7.3 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left BUF on time in May 2025?
81.8% of 1,899 scheduled domestic departures left less than 15 minutes late, and 81.5% reached their destination on time. The national figures that month were 76.7% and 75.4%.
How does that compare with a year earlier?
In May 2024, 79.8% of 1,878 departures left on time and 1.0% were cancelled, against 81.8% and 0.6% in May 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for BUF · methodology · corrections.