About 1 in 11 AA 3818 flights from Harlingen arrived 15+ minutes late, diverted or cancelled over the past year (9%); 0.4% were cancelled. The typical flight landed 9 minutes early.
AA 3818: HRL → DFW
Scheduled to leave Harlingen at 6:00 a.m. local time, operated by Envoy as MQ 3818. Over the past year it arrived on time 91% of the time (257 flights), better than other AA 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 | 38 | 84% |
| Tuesday | 37 | 95% |
| Wednesday | 37 | 95% |
| Thursday | 37 | 95% |
| Friday | 37 | 95% |
| Saturday | 36 | 83% |
| Sunday | 35 | 89% |
Why it was late
All flights HRL → DFW · Connecting off AA 3818? Check the risk
Questions
How often is AA 3818 from HRL to DFW late?
American Airlines 3818 from Harlingen/San Benito, TX to Dallas/Fort Worth, TX arrived 15 or more minutes late, was diverted or was cancelled on 9% of 257 scheduled flights between September 2025 and August 2026. 0.4% 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.