Airports › Buffalo (BUF) › May 2026
Airport month · May 2026
Buffalo Niagara International in May 2026
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 2026, reporting carriers scheduled 1,936 domestic departures from Buffalo Niagara International (BUF). 81.0% left less than 15 minutes late and 81.8% reached their destination on time; 0.7% were cancelled.
Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so BUF departures were 3.9 points above the national departure figure.
A year earlier, in May 2025, the airport had 1,899 departures with 81.8% leaving on time: a change of −0.8 points, with flights up 2%.
Flights arriving at BUF that month were on time 75.5% of the time (1,938 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 43%, air carrier 28% and national aviation system 23%.
- On time 81.8%
- Arrived 15+ minutes late 17.3%
- Cancelled 0.7%
- Diverted 0.2%
May 2026 against a year earlier, the airport's year and the nation
| Measure | May 2026 | May 2025 | BUF, 12 months to Jul 2026 | All reported flights, May 2026 |
|---|---|---|---|---|
| Departed on time | 81.0% | 81.8% | 75.6% | 77.1% |
| Arrived on time | 81.8% | 81.5% | 75.5% | 77.6% |
| Cancelled | 0.7% | 0.6% | 2.6% | 0.9% |
| Average departure delay (late minutes only) | 13.3 min | 13.2 min | 18.8 min | 16.0 min |
| Scheduled departures a day | 65 | 63 | 57 | 20,391 |
| Scheduled departures | 1,936 | 1,899 | 20,726 | 611,735 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| WN Southwest Airlines | 495 | 26% | 79.6% | 6.8 min | 0.2% |
| YX Republic Airline | 402 | 21% | 86.1% | -3.0 min | 1.0% |
| B6 JetBlue Airways | 303 | 16% | 87.5% | -2.2 min | 0.3% |
| AA American Airlines | 219 | 11% | 79.9% | 0.3 min | 1.4% |
| DL Delta Air Lines | 154 | 8% | 77.9% | 2.9 min | 1.9% |
| UA United Airlines | 109 | 6% | 80.7% | 11.4 min | 0.0% |
| OO SkyWest Airlines | 98 | 5% | 79.6% | 24.8 min | 0.0% |
| OH PSA Airlines | 71 | 4% | 73.2% | 6.7 min | 1.4% |
| F9 Frontier Airlines | 66 | 3% | 78.8% | -1.3 min | 0.0% |
| MQ Envoy Air | 19 | 1% | 68.4% | 2.2 min | 5.3% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| BUF–ORD | Buffalo to Chicago | 216 | 79.6% | 13.6 min | 0.5% |
| BUF–BOS | Buffalo to Boston | 167 | 88.6% | -3.7 min | 1.2% |
| BUF–BWI | Buffalo to Baltimore | 154 | 87.0% | 0.0 min | 0.6% |
| BUF–LGA | Buffalo to New York | 153 | 81.0% | 4.1 min | 0.7% |
| BUF–MCO | Buffalo to Orlando | 153 | 83.7% | 2.2 min | 0.0% |
| BUF–ATL | Buffalo to Atlanta | 149 | 74.5% | 4.1 min | 1.3% |
| BUF–DTW | Buffalo to Detroit | 107 | 86.0% | 4.5 min | 0.9% |
| BUF–JFK | Buffalo to New York | 104 | 89.4% | -5.0 min | 0.0% |
| BUF–CLT | Buffalo to Charlotte | 93 | 78.5% | 1.3 min | 1.1% |
| BUF–DCA | Buffalo to Washington | 93 | 71.0% | 6.8 min | 2.2% |
| BUF–EWR | Buffalo to Newark | 87 | 89.7% | -10.4 min | 2.3% |
| BUF–MDW | Buffalo to Chicago | 82 | 74.4% | 10.7 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left BUF on time in May 2026?
81.0% of 1,936 scheduled domestic departures left less than 15 minutes late, and 81.8% reached their destination on time. The national figures that month were 77.1% and 77.6%.
How does that compare with a year earlier?
In May 2025, 81.8% of 1,899 departures left on time and 0.6% were cancelled, against 81.0% and 0.7% in May 2026.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; 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.