Flight profile · SkyWest Airlines
OO4129
Minneapolis (MSP) to Washington (IAD) · scheduled 8:05 PM – 11:39 PM
How OO4129 performs
617 operations, June 2024 – August 2026.
Between its first and last recorded date on MSP → IAD, OO4129 averaged about 5 operations a week (617 in 816 days, cancelled ones included).
OO4129 arrived on time 79.4% of the time, against 82.5% for all MSP → IAD flights, so this departure is 3.1 percentage points worse than the route as a whole. Against SkyWest Airlines’ own flights on this route it is 2.2 points worse.
Source: US DOT Bureau of Transportation Statistics · 617 operations, June 2024 – August 2026 · If OO4129 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where OO4129 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
Ask for the position of OO4129 right now, if receivers on the ground are hearing it. Nothing is requested until you press the button.
Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| OO4129 | 79.4% | 1.46% | -8 min | 6.4% | 617 |
| SkyWest Airlines on MSP → IAD | 81.6% | 0.70% | -6 min | 5.4% | 2,716 |
| All MSP → IAD flights | 82.5% | 0.85% | -6 min | 5.2% | 3,046 |
OO4129 cancelled 9 of 617 operations (1.46%), above the 0.85% for MSP → IAD.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – August 2026
Why OO4129 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for OO4129 on MSP → IAD. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies OO4129 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, OO4129 pushed back an average of 27 minutes late; when it came in on time or early, an average of 3 minutes late.
Matched by tail number to the aircraft’s previous flight into MSP: 578 of 608 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| OO4129 | 24% | 45% | 8% |
| Network, same turn | 17% | 69% | 9% |
86 scheduled minutes is enough to clean and board when the aircraft is on time, with little to spare when it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often OO4129’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often OO4129 left 15 or more minutes late is lower than the network’s.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – August 2026
From pushback to gate
When it leaves MSP late, does that still matter by the time it reaches IAD?
OO4129 pushes back an average of 12.0 minutes late and reaches the gate at IAD an average of 5.6 minutes late. The 6.4 minutes between those two figures are slack the published schedule already carries, so a late pushback is partly, not fully, made up before the gate. It spends 23.3 minutes on the taxiways at MSP, 4.3 minutes longer than a typical MSP departure in the same hour.
On arrival at IAD, OO4129 spends 6.2 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 1.4 minutes shorter than a typical IAD arrival (7.5 min).
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 25,601 MSP departures. Taxi-in is landing to gate, set against 174,895 arrivals at IAD. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – August 2026
The hour it leaves MSP
OO4129 has one departure time, 8:05 PM, so this is what that hour at MSP is worth.
On-time arrival rate. 25,601 departures from MSP are scheduled in the 8 PM–9 PM hour over the period, against 380,472 across the whole day.
OO4129 is scheduled out of MSP at 8:05 PM, in the 8 PM–9 PM bank. Departures from MSP in that hour arrive on time 78.5% of the time against 81.1% across the airport’s whole day, so the hour OO4129 leaves in is an ordinary one for MSP and explains nothing about its record either way.
Both airport figures cover every destination from MSP, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – August 2026 · Hours below 120 departures are not scored.
Other routes OO4129 has flown
Carriers reassign flight numbers. OO4129 also served these 13 other city pairs in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| MSP→RAP Minneapolis to Rapid City | September 11, 2025 – October 5, 2025 | 22 | — |
| RAP→MSP Rapid City to Minneapolis | September 11, 2025 – October 5, 2025 | 22 | — |
| BHM→DTW Birmingham to Detroit | April 13, 2024 – May 4, 2024 | 10 | — |
| DTW→BHM Detroit to Birmingham | April 13, 2024 – May 4, 2024 | 10 | — |
| ORD→JFK Chicago to New York | January 8, 2024 – April 8, 2024 | 92 | 77.3% |
| JFK→ORD New York to Chicago | November 5, 2023 – December 15, 2023 | 39 | — |
| LAS→SAN Las Vegas to San Diego | October 28, 2023 – November 4, 2023 | 8 | — |
| SAN→LAS San Diego to Las Vegas | October 28, 2023 – November 4, 2023 | 8 | — |
| SLC→ABQ Salt Lake City to Albuquerque | September 5, 2023 – October 27, 2023 | 53 | — |
| DTW→TVC Detroit to Traverse City | August 8–30, 2023 | 8 | — |
| TVC→DTW Traverse City to Detroit | August 8–30, 2023 | 8 | — |
| BOI→SEA Boise to Seattle | August 25–27, 2023 | 3 | — |
| SMF→LAX Sacramento to Los Angeles | July 4–9, 2023 | 2 | — |
The figures above describe only MSP → IAD, the route OO4129 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
40 min late
against a median of 8 min early
Percentiles over 617 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – August 2026
Data and methodology
Calculated by FlyerIntel from 617 records of OO4129 operating MSP → IAD, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule; cancelled and diverted flights are reported separately, not in the on-time rate.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed