Route
DEN → BUF
Denver International Airport Buffalo Niagara International Airport
1,359 miles
Return route BUF → DEN →
How punctual is this route?
- On-time arrivals
- 67.5%
- Less than 15 minutes late
- Cancelled
- 0.2%
- Of scheduled flights
- Average delay when late
- 64 min
- Flights arriving 15+ minutes late
- Flights tracked
- 574
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 54%
- Airline (crew, maintenance, cleaning) 28%
- Air traffic control & airport 14%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 63.6% | 77 |
| October 2025 | 84.3% | 70 |
| November 2025 | 78.8% | 52 |
| December 2025 | 60.0% | 20 |
| January 2026 | 78.6% | 14 |
| February 2026 | 75.0% | 37 |
| March 2026 | 87.9% | 33 |
| April 2026 | 78.8% | 33 |
| May 2026 | 72.2% | 36 |
| June 2026 | 63.1% | 65 |
| July 2026 | 49.3% | 69 |
| August 2026 | 47.1% | 68 |
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 |
|---|---|---|---|---|
| United Airlines | 294 | 71.4% | 0.0% | 83 min |
| Southwest Airlines | 258 | 61.9% | 0.4% | 49 min |
| Frontier Airlines | 22 | 81.8% | 0.0% | 49 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
Reviews
No reviews yet. Be the first to review this route.