Flight UA1599
United Airlines flight UA1599
Looking for UA1599 in the airâŚ
Denver (DEN) to Houston (IAH)
Historically, this flight arrives 15+ minutes late 22% of the time, and when it is late the delay averages 77 minutes. It was cancelled 0.5% of the time.
- On-time arrivals
- 77.8%
- Less than 15 minutes late
- Cancelled
- 0.5%
- Of scheduled flights
- Average delay when late
- 77 min
- Flights arriving 15+ minutes late
- Flights tracked
- 201
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 45%
- Air traffic control & airport 33%
- Airline (crew, maintenance, cleaning) 22%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Fargo (FAR) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 29% of the time, and when it is late the delay averages 89 minutes. It was cancelled 0.6% of the time.
- On-time arrivals
- 71.0%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 89 min
- Flights arriving 15+ minutes late
- Flights tracked
- 163
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 42%
- Extreme weather 23%
- Airline (crew, maintenance, cleaning) 22%
- Late-arriving aircraft 14%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
EWR â PBI
Historically, this flight arrives 15+ minutes late 17% of the time, and when it is late the delay averages 51 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 83.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 51 min
- Flights arriving 15+ minutes late
- Flights tracked
- 24
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 35%
- Extreme weather 35%
- Late-arriving aircraft 28%
- Airline (crew, maintenance, cleaning) 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Milwaukee (MKE) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 14% of the time, and when it is late the delay averages 59 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 85.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 59 min
- Flights arriving 15+ minutes late
- Flights tracked
- 21
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 88%
- Airline (crew, maintenance, cleaning) 12%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Salt Lake City (SLC) to Denver (DEN)
Only 1 flight on record, which is too few for reliable odds.
- On-time arrivals
- 100.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- â
- Flights arriving 15+ minutes late
- Flights tracked
- 1
- Scheduled flights in the period
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 86.7% | 30 |
| October 2025 | 80.6% | 31 |
| November 2025 | 86.7% | 30 |
| December 2025 | 51.6% | 31 |
| January 2026 | 67.7% | 31 |
| February 2026 | 75.0% | 45 |
| March 2026 | 71.9% | 59 |
| April 2026 | 80.0% | 30 |
| May 2026 | 77.4% | 31 |
| June 2026 | 69.0% | 30 |
| July 2026 | 83.9% | 31 |
| August 2026 | 83.9% | 31 |
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