Flight number record
MQ 4129
Envoy Air · Springfield to Chicago
- Route
- SGF → ORD
- Departs
- 07:00
- Flights
- 317
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s MQ 4129, 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 4129 lands a B, 4 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 a little over an hour on average. That rests on 317 flights, with a median arrival 11 minutes early.
Key figures
On time
81.1%
Arrivals under 15 minutes late, of 312 completed flights
Avg delay
79 min
Across delayed arrivals only, not all flights
Cancelled
1.26%
National rate is 1.89%
1 hour+ late
8.0%
National rate is 8.3%
These figures cover 317 flights between September 2025 and August 2026. Beyond the headline rate, 8.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When MQ 4129 flies
MQ 4129 flies SGF to ORD without a single fixed slot. Its most common scheduled departure was 07:00, used on 54 of 317 flights, with 07:15 (54 flights) and 05:19 (43 flights) next.
- Departs 07:0054 flights17.0%
- Departs 07:1554 flights17.0%
- Departs 05:1943 flights13.6%
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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and MQ 4129 runs 8 points worse at 81.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
MQ 4129 next to SGF to ORD
Every carrier on SGF to ORD combined arrived on time 71.2% of the time across 1,453 flights, so MQ 4129 is 10 points ahead of it. Envoy flew 1,118 flights on the same city pair under all its flight numbers, including this one, and those ran 76.3% 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 4129thin sample | 317 | 81.1% | 79 min | 1.26% | B |
| All Envoy Air on SGF–ORD | 1,118 | 76.3% | 85 min | 2.50% | B |
| All carriers on SGF–ORD | 1,453 | 71.2% | 85 min | 3.30% | C− |
| Envoy Air, whole network | 320,362 | 81.0% | 70 min | 2.19% | B |
Across the year
MQ 4129 quarter by quarter
MQ 4129 did not run the same all year. Its best quarter was Apr–Jun 2026 at 84.5% on time and its weakest Jan–Mar 2026 at 73.8%, a swing of 11 points on roughly 79 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 202527 flights—
- Oct–Dec 202586 flights79.5%
- Jan–Mar 202663 flights73.8%
- Apr–Jun 202684 flights84.5%
- Jul–Sep 202657 flights78.9%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, MQ 4129 did best on Tuesday at 87.2% on time and worst on Sunday at 74.0%. Each day rests on about 45 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late MQ 4129 runs when it is late
MQ 4129 often beats the schedule: 135 of 312 completed flights, 43%, arrived 15 minutes or more early. The 59 late arrivals split 21 under half an hour, 13 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early135 flights43.3%
- Within 15 min118 flights37.8%
- 15–29 min late21 flights6.7%
- 30–59 min late13 flights4.2%
- 1–2 hours late12 flights3.8%
- 2+ hours late13 flights4.2%
Scale runs 0% to 100%.
Share of 312 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 37 departures that left 15 minutes late or more, only 2 made it up before arrival. In the other direction, 24 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 ORD.
The worst days
Worst days for MQ 4129
The latest arrival of the period was on 19 July 2026, 5 hours 34 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 July 2026 | 5 hours 34 minutes | Carrier |
| 26 June 2026 | 5 hours 21 minutes | Carrier |
| 6 August 2026 | 4 hours 26 minutes | Carrier |
| 18 December 2025 | 3 hours 58 minutes | Carrier |
| 21 July 2026 | 3 hours 25 minutes | Carrier |
Delay causes
Why MQ 4129 runs late
Carrier accounts for 48% of the 4,667 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Carrier
- 23%National Airspace System
- 16%Late-arriving aircraft
- 12%Extreme weather
- 1%Security
Extreme weather accounts for 12% 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 2.0 times the usual weather exposure. The split is drawn from 4,667 delay minutes reported on MQ 4129.
Cancellations sit at 1.26% against a national 1.89%, which is ordinary. Diversions add another 0.32%.
Connections and routes
What a delay on this flight costs
8.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
Every one of the 317 flights under MQ 4129 in the data flew SGF to ORD. 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. 317 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 4129
For a booking, read MQ 4129 as 81.1% on time with 1.26% cancelled over 317 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SGF to ORD, every carrier and departure
- ORD to SGF, the return direction
- Chicago O'Hare International (ORD) 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.