About 1 in 2 UA 1398 flights from Chicago arrived 15+ minutes late, diverted or cancelled over the past year (44%); 0.7% were cancelled. The typical flight landed 9 minutes late.
UA 1398: ORD → ATL
Scheduled to leave Chicago at 6:20 p.m. local time. Over the past year it arrived on time 56% of the time (292 flights), in line with other UA flights on the route at that hour (54%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Chicago to Atlanta (67% of days). United Airlines's last ORD–ATL flight was cancelled 1.4% of the time, against 1.5% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 7:12 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 43 | 47% |
| Tuesday | 41 | 61% |
| Wednesday | 39 | 62% |
| Thursday | 42 | 67% |
| Friday | 43 | 37% |
| Saturday | 42 | 69% |
| Sunday | 42 | 50% |
Why it was late
All flights ORD → ATL · Connecting off UA 1398? Check the risk
UA 1398: COS → ORD
Scheduled to leave Colorado Springs at 12:11 p.m. local time. Over the past year it arrived on time 72% of the time (127 flights), worse than other UA flights on the route at that hour (78%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Colorado Springs to Chicago (100% of days). United Airlines's last COS–ORD flight was cancelled 1.5% of the time, against 1.5% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 5:46 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 19 | — |
| Tuesday | 18 | — |
| Wednesday | 18 | — |
| Thursday | 18 | — |
| Friday | 18 | — |
| Saturday | 18 | — |
| Sunday | 18 | — |
Why it was late
All flights COS → ORD · Connecting off UA 1398? Check the risk
Questions
How often is UA 1398 from ORD to ATL late?
United Airlines 1398 from Chicago, IL to Atlanta, GA arrived 15 or more minutes late, was diverted or was cancelled on 44% of 292 scheduled flights between September 2025 and August 2026. 0.7% were cancelled.
How often is UA 1398 from COS to ORD late?
United Airlines 1398 from Colorado Springs, CO to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 28% of 127 scheduled flights between September 2025 and August 2026. 2.4% 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.