Flight UA1843
United Airlines flight UA1843
Looking for UA1843 in the airâŚ
Alerts at this flight's airports
Denver (DEN) to Columbus (CMH)
Historically, this flight arrives 15+ minutes late 28% of the time, and when it is late the delay averages 86 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 71.8%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 86 min
- Flights arriving 15+ minutes late
- Flights tracked
- 176
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 61%
- Airline (crew, maintenance, cleaning) 22%
- Air traffic control & airport 16%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Palm Springs (PSP) to Denver (DEN)
Historically, this flight arrives 15+ minutes late 27% of the time, and when it is late the delay averages 80 minutes. It was cancelled 0.6% of the time.
- On-time arrivals
- 72.8%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 80 min
- Flights arriving 15+ minutes late
- Flights tracked
- 155
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 59%
- Late-arriving aircraft 26%
- Airline (crew, maintenance, cleaning) 15%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Los Angeles (LAX) to Chicago (ORD)
Historically, this flight arrives 15+ minutes late 14% of the time, and when it is late the delay averages 38 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 86.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 38 min
- Flights arriving 15+ minutes late
- Flights tracked
- 100
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 57%
- Air traffic control & airport 31%
- Airline (crew, maintenance, cleaning) 12%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Miami (MIA) to Houston (IAH)
Historically, this flight arrives 15+ minutes late 11% of the time, and when it is late the delay averages 71 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 88.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 71 min
- Flights arriving 15+ minutes late
- Flights tracked
- 37
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 83%
- Air traffic control & airport 17%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Los Angeles (LAX) to Dulles (IAD)
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
- 80 min
- Flights arriving 15+ minutes late
- Flights tracked
- 16
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 91%
- Air traffic control & airport 9%
- Airline (crew, maintenance, cleaning) 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Los Angeles (LAX)
Only 6 flights on record, which is too few for reliable odds.
- On-time arrivals
- 83.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 71 min
- Flights arriving 15+ minutes late
- Flights tracked
- 6
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 100%
- Late-arriving aircraft 0%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Phoenix (PHX) to Chicago (ORD)
Only 3 flights on record, which is too few for reliable odds.
- On-time arrivals
- 33.3%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 108 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 84%
- Airline (crew, maintenance, cleaning) 16%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Denver (DEN) to Miami (MIA)
Only 2 flights 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
- 2
- Scheduled flights in the period
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 90.0% | 30 |
| October 2025 | 87.1% | 31 |
| November 2025 | 90.3% | 31 |
| December 2025 | 77.4% | 32 |
| January 2026 | 87.0% | 23 |
| February 2026 | 79.2% | 25 |
| March 2026 | 84.2% | 19 |
| April 2026 | 83.3% | 60 |
| May 2026 | 72.1% | 62 |
| June 2026 | 71.7% | 60 |
| July 2026 | 72.9% | 60 |
| August 2026 | 55.9% | 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