About 1 in 8 UA 1421 flights from Chicago arrived 15+ minutes late, diverted or cancelled over the past year (12%); 0.3% were cancelled. The typical flight landed 8 minutes early.
UA 1421: ORD → FLL
Scheduled to leave Chicago at 7:00 a.m. local time. Over the past year it arrived on time 88% of the time (341 flights), in line with other UA flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 89% |
| Tuesday | 39 | 90% |
| Wednesday | 41 | 90% |
| Thursday | 52 | 92% |
| Friday | 52 | 90% |
| Saturday | 52 | 77% |
| Sunday | 52 | 88% |
Why it was late
All flights ORD → FLL · Connecting off UA 1421? Check the risk
UA 1421: FLL → IAD
Scheduled to leave Fort Lauderdale at 12:13 p.m. local time. Over the past year it arrived on time 89% of the time (159 flights), in line with other UA flights on the route at that hour (86%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 23 | 96% |
| Tuesday | 22 | 91% |
| Wednesday | 22 | 91% |
| Thursday | 23 | 91% |
| Friday | 23 | 83% |
| Saturday | 23 | 83% |
| Sunday | 23 | 87% |
Why it was late
All flights FLL → IAD · Connecting off UA 1421? Check the risk
Questions
How often is UA 1421 from ORD to FLL late?
United Airlines 1421 from Chicago, IL to Fort Lauderdale, FL arrived 15 or more minutes late, was diverted or was cancelled on 12% of 341 scheduled flights between September 2025 and August 2026. 0.3% were cancelled.
How often is UA 1421 from FLL to IAD late?
United Airlines 1421 from Fort Lauderdale, FL to Washington, DC arrived 15 or more minutes late, was diverted or was cancelled on 11% of 159 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check United Airlines for today's flight. Method.