Flight number record
MQ 3858
Envoy Air · Tallahassee to Miami
- Route
- TLH → MIA
- Departs
- 06:00
- Flights
- 361
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s MQ 3858, 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 3858 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 3.6 hours. That rests on 361 flights, with a median arrival 8 minutes early.
Set against the rest of the country, MQ 3858's record is 15 points better than the US average of 77.3%. That gap is worth roughly 146 fewer late arrivals for every thousand flights.
Key figures
On time
91.9%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
216 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
4.7%
National rate is 8.3%
These figures cover 361 flights between September 2025 and August 2026. The median arrival is 8 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 3858 flies
MQ 3858 flies TLH to MIA without a single fixed slot. Its most common scheduled departure was 06:00, used on 126 of 361 flights, with 06:15 (69 flights) and 06:05 (50 flights) next.
- Departs 06:00126 flights34.9%
- Departs 06:1569 flights19.1%
- Departs 06:0550 flights13.9%
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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and MQ 3858 runs 3 points better at 91.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
MQ 3858 next to TLH to MIA
Every carrier on TLH to MIA combined arrived on time 81.6% of the time across 1,198 flights, so MQ 3858 is 10 points ahead of it. Envoy flew 1,182 flights on the same city pair under all its flight numbers, including this one, and those ran 81.8% on time. Across its whole network Envoy Air managed 81.0%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| MQ 3858thin sample | 361 | 91.9% | 216 min | 0.55% | A+ |
| All Envoy Air on TLH–MIA | 1,182 | 81.8% | 76 min | 0.59% | B+ |
| All carriers on TLH–MIA | 1,198 | 81.6% | 78 min | 0.58% | B+ |
| Envoy Air, whole network | 320,362 | 81.0% | 70 min | 2.19% | B |
Across the year
MQ 3858 quarter by quarter
MQ 3858 did not run the same all year. Its best quarter was Apr–Jun 2026 at 98.9% on time and its weakest Oct–Dec 2025 at 87.9%, a swing of 11 points on roughly 72 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 flights90.0%
- Oct–Dec 202592 flights87.9%
- Jan–Mar 202686 flights89.4%
- Apr–Jun 202691 flights98.9%
- Jul–Sep 202662 flights91.9%
Scale runs 80% to 100%.
By weekday, MQ 3858 ranged from 86.3% on Sunday to 98.0% on Tuesday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late MQ 3858 runs when it is late
When MQ 3858 is late it tends to be very late: 17 of its 29 late arrivals were an hour or more behind, and 12 were two hours or more.
- 15+ min early45 flights12.6%
- Within 15 min284 flights79.3%
- 15–29 min late4 flights1.1%
- 30–59 min late8 flights2.2%
- 1–2 hours late5 flights1.4%
- 2+ hours late12 flights3.4%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 28 departures that left 15 minutes late or more, only 2 made it up before arrival. Only 3 left on time and still arrived late.
The worst days
Worst days for MQ 3858
The latest arrival of the period was on 3 August 2026, 41 hours 14 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in November 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 August 2026 | 41 hours 14 minutes | Carrier |
| 23 November 2025 | 8 hours 8 minutes | Late-arriving aircraft |
| 24 November 2025 | 6 hours 46 minutes | Extreme weather |
| 11 December 2025 | 5 hours 58 minutes | Late-arriving aircraft |
| 21 November 2025 | 4 hours 58 minutes | Extreme weather |
Delay causes
Why MQ 3858 runs late
Carrier accounts for 65% of the 6,277 delay minutes carriers reported here, and the remaining four split what is left.
- 65%Carrier
- 15%Extreme weather
- 13%Late-arriving aircraft
- 7%National Airspace System
Extreme weather accounts for 15% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.5 times the usual weather exposure. The split is drawn from 6,277 delay minutes reported on MQ 3858.
Cancellations are rare at 0.55%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.7% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
Every one of the 361 flights under MQ 3858 in the data flew TLH to MIA. 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. 361 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 3858
For a booking, MQ 3858 has one of the better records a US domestic flight can show: 91.9% on time and 0.55% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- TLH to MIA, every carrier and departure
- MIA to TLH, the return direction
- Miami International (MIA) 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
- Worst months to fly in the US, ranked by the data
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.