Flight number record

MQ 3427

Envoy Air · Miami to Birmingham

Route: MIA → BHM
Departs: 22:55
Flights: 307
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s MQ 3427, 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 3427 lands a B+, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 45 minutes on average. That is a workable record, not a spotless one. That rests on 307 flights, with a median arrival 5 minutes early.

Set against the rest of the country, MQ 3427's record is 5 points better than the US average of 77.6%. That gap is worth roughly 54 fewer late arrivals for every thousand flights.

On time

83.0%

Arrivals under 15 minutes late, of 306 completed flights

Avg delay

45 min

Across delayed arrivals only, not all flights

Cancelled

0.33%

National rate is 1.81%

1 hour+ late

2.9%

National rate is 8.1%

These figures cover 307 flights between July 2025 and June 2026. The median arrival is 5 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 3427 flies

MQ 3427 flies MIA to BHM without a single fixed slot. Its most common scheduled departure was 22:55, used on 92 of 307 flights, with 22:49 (44 flights) and 22:51 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:5592 flights30.0%
Departs 22:4944 flights14.3%
Departs 22:5137 flights12.1%

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 22:55 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and MQ 3427 runs 13 points better at 83.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

MQ 3427 next to MIA to BHM

Every carrier on MIA to BHM combined arrived on time 84.1% of the time across 678 flights, so MQ 3427 is about level with it. Envoy flew 666 flights on the same city pair under all its flight numbers, including this one, and those ran 84.5% on time. Across its whole network Envoy Air managed 80.2%, which this flight beats by 3 points.

MQ 3427 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
MQ 3427thin sample	307	83.0%	45 min	0.33%	B+
All Envoy Air on MIA–BHM	666	84.5%	44 min	0.75%	B+
All carriers on MIA–BHM	678	84.1%	46 min	0.74%	B+
Envoy Air, whole network	315,435	80.2%	67 min	2.30%	B

Across the year

MQ 3427 quarter by quarter

MQ 3427 did not run the same all year. Its best quarter was Jul–Sep 2025 at 89.0% on time and its weakest Jan–Mar 2026 at 75.6%, a swing of 13 points on roughly 77 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 202591 flights89.0%
Oct–Dec 202579 flights88.5%
Jan–Mar 202690 flights75.6%
Apr–Jun 202647 flights76.6%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, MQ 3427 did best on Thursday at 90.7% on time and worst on Sunday at 77.8%. Each day rests on about 44 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Delay causes

Why MQ 3427 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,312 reported delay minutes.

Carrier
38%
Late-arriving aircraft
34%
National Airspace System
25%
Extreme weather
3%

The largest share of delay minutes, 38%, 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 887 of the 2,312 delay minutes reported here. The split is drawn from 2,312 delay minutes reported on MQ 3427.

Cancellations are rare at 0.33%, 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 2.9% 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 661 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.

The same number turns up on two other city pairs in the data, including ORD to BNA (44) and BNA to ORD (44), but none flew often enough under MQ 3427 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MIA to BHM only.

One caution: this is a thin sample. 307 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 3427

For a booking, read MQ 3427 as 83.0% on time with 0.33% cancelled over 307 flights. Those are rates from the past twelve months, not a forecast for any particular 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