Flight number record
MQ 3937
Envoy Air · Dallas-Fort Worth to Billings
- Route
- DFW → BIL
- Departs
- 21:15
- Flights
- 326
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s MQ 3937, check with Envoy Air. Envoy Air flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
MQ 3937 lands a B, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 326 flights, with a median arrival 6 minutes early.
Key figures
On time
79.2%
Arrivals under 15 minutes late, of 322 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
1.23%
National rate is 1.89%
1 hour+ late
6.2%
National rate is 8.3%
These figures cover 326 flights between September 2025 and August 2026. The median arrival is 6 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When MQ 3937 flies
MQ 3937 flies DFW to BIL without a single fixed slot. Its most common scheduled departure was 21:15, used on 75 of 326 flights, with 19:14 (45 flights) and 20:41 (44 flights) next.
- Departs 21:1575 flights23.0%
- Departs 19:1445 flights13.8%
- Departs 20:4144 flights13.5%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 21:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and MQ 3937 runs 9 points better at 79.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
MQ 3937 next to DFW to BIL
Every carrier on DFW to BIL combined arrived on time 82.2% of the time across 687 flights, so MQ 3937 is 3 points behind it. Across its whole network Envoy Air managed 81.0%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| MQ 3937thin sample | 326 | 79.2% | 55 min | 1.23% | B |
| All Envoy Air on DFW–BIL | 687 | 82.2% | 54 min | 0.73% | B+ |
| All carriers on DFW–BIL | 687 | 82.2% | 54 min | 0.73% | B+ |
| Envoy Air, whole network | 320,362 | 81.0% | 70 min | 2.19% | B |
Across the year
MQ 3937 quarter by quarter
MQ 3937 did not run the same all year. Its best quarter was Jul–Sep 2026 at 86.9% on time and its weakest Apr–Jun 2026 at 74.4%, a swing of 13 points on roughly 82 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights—
- Oct–Dec 202591 flights77.8%
- Jan–Mar 202652 flights80.8%
- Apr–Jun 202691 flights74.4%
- Jul–Sep 202662 flights86.9%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, MQ 3937 did best on Monday at 89.4% on time and worst on Sunday at 71.7%. Each day rests on about 47 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late MQ 3937 runs when it is late
MQ 3937 often beats the schedule: 90 of 322 completed flights, 28%, arrived 15 minutes or more early. The 67 late arrivals split 29 under half an hour, 18 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early90 flights28.0%
- Within 15 min165 flights51.2%
- 15–29 min late29 flights9.0%
- 30–59 min late18 flights5.6%
- 1–2 hours late12 flights3.7%
- 2+ hours late8 flights2.5%
Scale runs 0% to 100%.
Share of 322 completed flights by arrival against schedule.
12 of 61 late departures made up the time and arrived on time, 20% of them. In the other direction, 18 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at BIL.
The worst days
Worst days for MQ 3937
The latest arrival of the period was on 10 May 2026, 4 hours 42 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 May 2026 | 4 hours 42 minutes | Late-arriving aircraft |
| 29 November 2025 | 3 hours 10 minutes | Late-arriving aircraft |
| 19 June 2026 | 2 hours 55 minutes | National Airspace System |
| 24 May 2026 | 2 hours 30 minutes | Extreme weather |
| 13 July 2026 | 2 hours 28 minutes | Late-arriving aircraft |
Delay causes
Why MQ 3937 runs late
Late-arriving aircraft accounts for 53% of the 3,707 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Late-arriving aircraft
- 23%National Airspace System
- 17%Carrier
- 7%Extreme weather
53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,707 reported delay minutes here, that single category outweighs weather by 7 to one. The split is drawn from 3,707 delay minutes reported on MQ 3937.
Cancellations sit at 1.23% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
6.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 1,081 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 326 flights under MQ 3937 in the data flew DFW to BIL. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 326 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking MQ 3937
For a booking, read MQ 3937 as 79.2% on time with 1.23% cancelled over 326 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- Dallas/Fort Worth International (DFW) delay statistics
- Envoy Air on-time record
- Every Envoy Air flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Envoy Air’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.