About 1 in 3 AA 4403 flights from Chicago arrived 15+ minutes late, diverted or cancelled over the past year (40%); 4.4% were cancelled. The typical flight landed 2 minutes late.
AA 4403: ORD → PWM
Scheduled to leave Chicago at 7:10 p.m. local time, operated by Republic Airways as YX 4403. Over the past year it arrived on time 60% of the time (135 flights), worse than other AA flights on the route at that hour (67%). Last seen in the data Aug 4, 2026.
Usually American Airlines's last flight of the day from Chicago to Portland (100% of days). American Airlines's last ORD–PWM flight was cancelled 5.9% of the time, against 1.0% for its earlier ones. If it's cancelled, the next American Airlines flight is usually around 8:05 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 19 | — |
| Tuesday | 19 | — |
| Wednesday | 19 | — |
| Thursday | 20 | 60% |
| Friday | 20 | 60% |
| Saturday | 19 | — |
| Sunday | 19 | — |
Why it was late
All flights ORD → PWM · Connecting off AA 4403? Check the risk
Questions
How often is AA 4403 from ORD to PWM late?
American Airlines 4403 from Chicago, IL to Portland, ME arrived 15 or more minutes late, was diverted or was cancelled on 40% of 135 scheduled flights between September 2025 and August 2026. 4.4% 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 American Airlines for today's flight. Method.