Flight number record
MQ 3435
Envoy Air · Miami to Greer
- Route
- MIA → GSP
- Departs
- 21:55
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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, 3 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 40 minutes on average. That rests on 363 flights, with a median arrival 8 minutes early.
Key figures
On time
80.7%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
40 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.89%
1 hour+ late
3.9%
National rate is 8.3%
These figures cover 363 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 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 363 flights, with 21:50 (52 flights) next.
- Departs 21:5571 flights19.6%
- Departs 21:5052 flights14.3%
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 21:55 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and MQ 3435 runs 11 points better at 80.7%. 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 3435 next to MIA to GSP
Every carrier on MIA to GSP combined arrived on time 79.3% of the time across 724 flights, so MQ 3435 is about level with it. Envoy flew 698 flights on the same city pair under all its flight numbers, including this one, and those ran 79.7% on time. Across its whole network Envoy Air managed 81.0%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| MQ 3435thin sample | 363 | 80.7% | 40 min | 1.10% | B |
| All Envoy Air on MIA–GSP | 698 | 79.7% | 42 min | 1.00% | B |
| All carriers on MIA–GSP | 724 | 79.3% | 46 min | 1.24% | B |
| Envoy Air, whole network | 320,362 | 81.0% | 70 min | 2.19% | 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 93.3% on time and its weakest Jan–Mar 2026 at 69.4%, a swing of 24 points on roughly 73 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 flights93.3%
- Oct–Dec 202591 flights85.6%
- Jan–Mar 202689 flights69.4%
- Apr–Jun 202691 flights83.5%
- Jul–Sep 202662 flights79.0%
Scale runs 60% to 100%.
By weekday, MQ 3435 did best on Wednesday at 92.2% on time and worst on Sunday at 61.2%. Each day rests on about 52 flights, so a gap of 31 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late MQ 3435 runs when it is late
MQ 3435 often beats the schedule: 102 of 358 completed flights, 28%, arrived 15 minutes or more early. The 69 late arrivals split 30 under half an hour, 25 between 30 and 60 minutes, and 14 an hour or more.
- 15+ min early102 flights28.5%
- Within 15 min187 flights52.2%
- 15–29 min late30 flights8.4%
- 30–59 min late25 flights7.0%
- 1–2 hours late13 flights3.6%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
7 of 56 late departures made up the time and arrived on time, 13% of them. In the other direction, 20 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 GSP.
The worst days
Worst days for MQ 3435
The latest arrival of the period was on 7 December 2025, 2 hours 6 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 December 2025 | 2 hours 6 minutes | Late-arriving aircraft |
| 7 April 2026 | 1 hour 32 minutes | Late-arriving aircraft |
| 28 May 2026 | 1 hour 23 minutes | Carrier |
| 5 December 2025 | 1 hour 21 minutes | Carrier |
| 20 March 2026 | 1 hour 21 minutes | Carrier |
Delay causes
Why MQ 3435 runs late
Late-arriving aircraft accounts for 42% of the 2,753 delay minutes carriers reported here, and the remaining four split what is left.
- 42%Late-arriving aircraft
- 30%National Airspace System
- 26%Carrier
- 3%Extreme weather
42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,753 reported delay minutes here, that single category outweighs weather by 16 to one. The split is drawn from 2,753 delay minutes reported on MQ 3435.
Cancellations sit at 1.10% against a national 1.89%, 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 3.9% 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.
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.
Every one of the 363 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. 363 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 80.7% on time with 1.10% cancelled over 363 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.