Flight UA2435
United Airlines flight UA2435
Looking for UA2435 in the airâŚ
Dulles (IAD) to Sacramento (SMF)
Historically, this flight arrives 15+ minutes late 19% of the time, and when it is late the delay averages 64 minutes. It was cancelled 1.4% of the time.
- On-time arrivals
- 80.8%
- Less than 15 minutes late
- Cancelled
- 1.4%
- Of scheduled flights
- Average delay when late
- 64 min
- Flights arriving 15+ minutes late
- Flights tracked
- 349
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 33%
- Air traffic control & airport 28%
- Late-arriving aircraft 26%
- Extreme weather 12%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Miami (MIA) to Dulles (IAD)
Historically, this flight arrives 15+ minutes late 12% of the time, and when it is late the delay averages 85 minutes. It was cancelled 0.3% of the time.
- On-time arrivals
- 87.7%
- Less than 15 minutes late
- Cancelled
- 0.3%
- Of scheduled flights
- Average delay when late
- 85 min
- Flights arriving 15+ minutes late
- Flights tracked
- 328
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Air traffic control & airport 27%
- Airline (crew, maintenance, cleaning) 16%
- Extreme weather 8%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sacramento (SMF) to Newark (EWR)
Historically, this flight arrives 15+ minutes late 26% of the time, and when it is late the delay averages 43 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 73.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 43 min
- Flights arriving 15+ minutes late
- Flights tracked
- 89
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 61%
- Airline (crew, maintenance, cleaning) 21%
- Air traffic control & airport 16%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chicago (ORD) to Miami (MIA)
Historically, this flight arrives 15+ minutes late 19% of the time, and when it is late the delay averages 62 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 81.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 62 min
- Flights arriving 15+ minutes late
- Flights tracked
- 21
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 80%
- Late-arriving aircraft 10%
- Airline (crew, maintenance, cleaning) 10%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 89.4% | 66 |
| October 2025 | 77.0% | 87 |
| November 2025 | 83.1% | 60 |
| December 2025 | 80.4% | 46 |
| January 2026 | 74.6% | 62 |
| February 2026 | 78.1% | 73 |
| March 2026 | 81.8% | 66 |
| April 2026 | 88.5% | 61 |
| May 2026 | 91.4% | 82 |
| June 2026 | 87.9% | 60 |
| July 2026 | 86.9% | 62 |
| August 2026 | 75.8% | 62 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 â August 2026. Covers flights operated by reporting U.S. carriers. About our data