About 1 in 5 AA 3937 flights from Dallas arrived 15+ minutes late, diverted or cancelled over the past year (22%); 1.2% were cancelled. The typical flight landed 6 minutes early.
AA 3937: DFW → BIL
Scheduled to leave Dallas at 9:15 p.m. local time, operated by Envoy as MQ 3937. Over the past year it arrived on time 78% of the time (326 flights), in line with other AA flights on the route at that hour (81%). Last seen in the data Aug 31, 2026.
Usually American Airlines's last flight of the day from Dallas to Billings (99% of days). American Airlines's last DFW–BIL flight was cancelled 1.2% of the time, against 0.0% for its earlier ones. If it's cancelled, the next American Airlines flight is usually around 11:00 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 47 | 89% |
| Tuesday | 46 | 83% |
| Wednesday | 46 | 78% |
| Thursday | 46 | 74% |
| Friday | 47 | 77% |
| Saturday | 47 | 77% |
| Sunday | 47 | 70% |
Why it was late
All flights DFW → BIL · Connecting off AA 3937? Check the risk
Questions
How often is AA 3937 from DFW to BIL late?
American Airlines 3937 from Dallas/Fort Worth, TX to Billings, MT arrived 15 or more minutes late, was diverted or was cancelled on 22% of 326 scheduled flights between September 2025 and August 2026. 1.2% 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.