Flight UA2155
United Airlines flight UA2155
Looking for UA2155 in the airâŚ
Charlotte (CLT) to Chicago (ORD)
Historically, this flight arrives 15+ minutes late 49% of the time, and when it is late the delay averages 87 minutes. It was cancelled 2.2% of the time.
- On-time arrivals
- 50.9%
- Less than 15 minutes late
- Cancelled
- 2.2%
- Of scheduled flights
- Average delay when late
- 87 min
- Flights arriving 15+ minutes late
- Flights tracked
- 179
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 48%
- Late-arriving aircraft 35%
- Airline (crew, maintenance, cleaning) 17%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Idaho Falls (IDA) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 28% of the time, and when it is late the delay averages 127 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 71.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 127 min
- Flights arriving 15+ minutes late
- Flights tracked
- 146
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 36%
- Air traffic control & airport 34%
- Late-arriving aircraft 31%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to Pittsburgh (PIT)
Historically, this flight arrives 15+ minutes late 35% of the time, and when it is late the delay averages 92 minutes. It was cancelled 0.8% of the time.
- On-time arrivals
- 65.3%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 92 min
- Flights arriving 15+ minutes late
- Flights tracked
- 123
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 71%
- Air traffic control & airport 14%
- Airline (crew, maintenance, cleaning) 13%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Houston (IAH) to St Louis (STL)
Only 16 flights on record, which is too few for reliable odds.
- On-time arrivals
- 81.2%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 72 min
- Flights arriving 15+ minutes late
- Flights tracked
- 16
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 70%
- Airline (crew, maintenance, cleaning) 29%
- Air traffic control & airport 1%
- 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 | 83.3% | 30 |
| October 2025 | 56.7% | 31 |
| November 2025 | 39.3% | 29 |
| December 2025 | 53.6% | 28 |
| January 2026 | 44.8% | 31 |
| February 2026 | 40.0% | 25 |
| March 2026 | 56.5% | 23 |
| April 2026 | 81.8% | 22 |
| May 2026 | 82.3% | 62 |
| June 2026 | 71.2% | 60 |
| July 2026 | 61.4% | 61 |
| August 2026 | 53.4% | 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