Flight number record
MQ 3435
Envoy Air · Miami to Greer
- Route
- MIA → GSP
- Departs
- 21:55
- Flights
- 362
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s MQ 3435, 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 3435 lands a B, 4 points better than the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about 40 minutes on average. That is a workable record, not a spotless one. That rests on 362 flights, with a median arrival 7 minutes early.
Set against the rest of the country, MQ 3435's record is 4 points better than the US average of 77.6%. That gap is worth roughly 42 fewer late arrivals for every thousand flights.
Key figures
On time
81.8%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
40 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.81%
1 hour+ late
4.2%
National rate is 8.1%
These figures cover 362 flights between July 2025 and June 2026. The median arrival is 7 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 3435 flies
MQ 3435 flies MIA to GSP without a single fixed slot. Its most common scheduled departure was 21:55, used on 71 of 362 flights, with 21:50 (52 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 21:5571 flights19.6%
- Departs 21:5052 flights14.4%
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 21:55 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and MQ 3435 runs 11 points better at 81.8%. 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 3435 next to MIA to GSP
Every carrier on MIA to GSP combined arrived on time 81.0% of the time across 726 flights, so MQ 3435 is about level with it. Envoy flew 705 flights on the same city pair under all its flight numbers, including this one, and those ran 81.1% on time. Across its whole network Envoy Air managed 80.2%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| MQ 3435thin sample | 362 | 81.8% | 40 min | 1.10% | B |
| All Envoy Air on MIA–GSP | 705 | 81.1% | 41 min | 0.99% | B+ |
| All carriers on MIA–GSP | 726 | 81.0% | 41 min | 1.24% | B |
| Envoy Air, whole network | 315,435 | 80.2% | 67 min | 2.30% | B |
Across the year
MQ 3435 quarter by quarter
MQ 3435 did not run the same all year. Its best quarter was Jul–Sep 2025 at 87.9% on time and its weakest Jan–Mar 2026 at 69.4%, a swing of 19 points on roughly 91 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 flights87.9%
- Oct–Dec 202591 flights85.6%
- Jan–Mar 202689 flights69.4%
- Apr–Jun 202691 flights83.5%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, MQ 3435 did best on Tuesday at 94.2% on time and worst on Sunday at 61.2%. Each day rests on about 52 flights, so a gap of 33 points is worth noticing but could still narrow in another year.
Delay causes
Why MQ 3435 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 51% of the 2,618 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.
- 51%Late-arriving aircraft
- 24%National Airspace System
- 23%Carrier
- 3%Extreme weather
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,618 reported delay minutes here, that single category outweighs weather by 20 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,618 delay minutes reported on MQ 3435.
Cancellations sit at 1.10% against a national 1.81%, which is ordinary. Diversions add another 0.28%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.2% 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 637 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 362 flights under MQ 3435 in the data flew MIA to GSP. 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. 362 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 3435
For a booking, read MQ 3435 as 81.8% on time with 1.10% cancelled over 362 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- MIA to GSP, every carrier and departure
- GSP to MIA, 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
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.