About 1 in 7 AA 3999 flights from Dallas arrived 15+ minutes late, diverted or cancelled over the past year (15%); 0.0% were cancelled. The typical flight landed 12 minutes early.
AA 3999: DFW → GCK
Scheduled to leave Dallas at 1:15 p.m. local time, operated by Envoy as MQ 3999. Over the past year it arrived on time 85% of the time (133 flights), better than other AA flights on the route at that hour (77%). Last seen in the data Jul 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 19 | — |
| Tuesday | 19 | — |
| Wednesday | 19 | — |
| Thursday | 20 | 100% |
| Friday | 19 | — |
| Saturday | 19 | — |
| Sunday | 18 | — |
Why it was late
All flights DFW → GCK · Connecting off AA 3999? Check the risk
AA 3999: GCK → DFW
Scheduled to leave Garden City at 3:16 p.m. local time, operated by Envoy as MQ 3999. Over the past year it arrived on time 79% of the time (133 flights), better than other AA flights on the route at that hour (75%). Last seen in the data Jul 31, 2026.
Usually American Airlines's last flight of the day from Garden City to Dallas (100% of days). American Airlines's last GCK–DFW flight was cancelled 1.9% of the time, against 3.0% for its earlier ones. If it's cancelled, the next American Airlines flight is usually around 5:00 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 19 | — |
| Tuesday | 19 | — |
| Wednesday | 19 | — |
| Thursday | 20 | 90% |
| Friday | 19 | — |
| Saturday | 19 | — |
| Sunday | 18 | — |
Why it was late
All flights GCK → DFW · Connecting off AA 3999? Check the risk
Questions
How often is AA 3999 from DFW to GCK late?
American Airlines 3999 from Dallas/Fort Worth, TX to Garden City, KS arrived 15 or more minutes late, was diverted or was cancelled on 15% of 133 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
How often is AA 3999 from GCK to DFW late?
American Airlines 3999 from Garden City, KS to Dallas/Fort Worth, TX arrived 15 or more minutes late, was diverted or was cancelled on 21% of 133 scheduled flights between September 2025 and August 2026. 1.5% 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.