Flight UA1505
United Airlines flight UA1505
Looking for UA1505 in the air…
Seattle (SEA) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 9% of the time, and when it is late the delay averages 139 minutes. It was cancelled 0.8% of the time.
- On-time arrivals
- 91.1%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 139 min
- Flights arriving 15+ minutes late
- Flights tracked
- 363
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 47%
- Late-arriving aircraft 29%
- Air traffic control & airport 13%
- Extreme weather 11%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to Newark (EWR)
Historically, this flight arrives 15+ minutes late 31% of the time, and when it is late the delay averages 94 minutes. It was cancelled 1.9% of the time.
- On-time arrivals
- 69.0%
- Less than 15 minutes late
- Cancelled
- 1.9%
- Of scheduled flights
- Average delay when late
- 94 min
- Flights arriving 15+ minutes late
- Flights tracked
- 320
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 54%
- Late-arriving aircraft 27%
- Airline (crew, maintenance, cleaning) 18%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Newark (EWR) to West Palm Beach (DJT)
Only 17 flights on record, which is too few for reliable odds.
- On-time arrivals
- 75.0%
- Less than 15 minutes late
- Cancelled
- 5.9%
- Of scheduled flights
- Average delay when late
- 44 min
- Flights arriving 15+ minutes late
- Flights tracked
- 17
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 57%
- Air traffic control & airport 28%
- Airline (crew, maintenance, cleaning) 15%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Newark (EWR) to Chicago (ORD)
Only 2 flights on record, which is too few for reliable odds.
- On-time arrivals
- 0.0%
- Less than 15 minutes late
- Cancelled
- 50.0%
- Of scheduled flights
- Average delay when late
- 74 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 57%
- Airline (crew, maintenance, cleaning) 32%
- Air traffic control & airport 11%
- 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 | 91.7% | 36 |
| October 2025 | 79.0% | 62 |
| November 2025 | 78.0% | 60 |
| December 2025 | 79.0% | 62 |
| January 2026 | 88.3% | 62 |
| February 2026 | 79.6% | 56 |
| March 2026 | 75.4% | 62 |
| April 2026 | 86.4% | 59 |
| May 2026 | 92.7% | 42 |
| June 2026 | 81.0% | 60 |
| July 2026 | 70.7% | 62 |
| August 2026 | 75.3% | 79 |
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