Flight number record

MQ 3638

Envoy Air · Cincinnati to Miami

Route: CVG → MIA
Departs: 08:41
Flights: 340
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s MQ 3638, 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 3638 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 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 50 minutes. That rests on 340 flights, with a median arrival 6 minutes early.

Set against the rest of the country, MQ 3638's record is 9 points better than the US average of 77.6%. That gap is worth roughly 94 fewer late arrivals for every thousand flights.

On time

87.0%

Arrivals under 15 minutes late, of 338 completed flights

Avg delay

50 min

Across delayed arrivals only, not all flights

Cancelled

0.59%

National rate is 1.81%

1 hour+ late

3.0%

National rate is 8.1%

These figures cover 340 flights between July 2025 and June 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.

Schedule

When MQ 3638 flies

MQ 3638 flies CVG to MIA without a single fixed slot. Its most common scheduled departure was 08:41, used on 45 of 340 flights, with 07:15 (43 flights) and 08:28 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:4145 flights13.2%
Departs 07:1543 flights12.6%
Departs 08:2837 flights10.9%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 08:41 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and MQ 3638 runs 3 points better at 87.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

MQ 3638 next to CVG to MIA

Every carrier on CVG to MIA combined arrived on time 80.1% of the time across 998 flights, so MQ 3638 is 7 points ahead of it. Envoy flew 782 flights on the same city pair under all its flight numbers, including this one, and those ran 82.2% on time. Across its whole network Envoy Air managed 80.2%, which this flight beats by 7 points.

MQ 3638 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
MQ 3638thin sample	340	87.0%	50 min	0.59%	A+
All Envoy Air on CVG–MIA	782	82.2%	56 min	0.64%	B+
All carriers on CVG–MIA	998	80.1%	67 min	0.80%	B+
Envoy Air, whole network	315,435	80.2%	67 min	2.30%	B

Across the year

MQ 3638 quarter by quarter

Quarter by quarter MQ 3638 held fairly steady: 90.2% in Jul–Sep 2025, 82.4% in Oct–Dec 2025, 82.8% in Jan–Mar 2026 and 91.2% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights90.2%
Oct–Dec 202591 flights82.4%
Jan–Mar 202666 flights82.8%
Apr–Jun 202691 flights91.2%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, MQ 3638 ranged from 81.2% on Friday to 91.7% on Monday. With about 49 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why MQ 3638 runs late

One category carries most of the weight here. Carrier accounts for 65% of the 2,195 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
65%
National Airspace System
31%
Extreme weather
4%

The largest share of delay minutes, 65%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,418 of the 2,195 delay minutes reported here. The split is drawn from 2,195 delay minutes reported on MQ 3638.

Cancellations are rare at 0.59%, below the national 1.81% 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 3.0% land an hour or more behind schedule, against 8.1% 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.

The 948 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 340 flights under MQ 3638 in the data flew CVG 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. 340 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 3638

For a booking, MQ 3638 has one of the better records a US domestic flight can show: 87.0% on time and 0.59% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures