Flight profile · SkyWest Airlines
OO3918
Portland (PDX) to Seattle (SEA) · scheduled 5:15 PM – 6:23 PM
How OO3918 performs
611 operations, December 2023 – August 2026.
Between its first and last recorded date on PDX → SEA, OO3918 averaged about 4 operations a week (611 in 990 days, cancelled ones included).
OO3918 arrived on time 86.0% of the time, level with the 85.6% for all PDX → SEA flights: on arrival punctuality it is a typical departure on this route, neither better nor worse.
OO3918’s scheduled departure has moved during the period FlyerIntel has on file: it typically left around 5:15 PM earlier on, and around 5:45 PM more recently — a 30-minute shift, not the few minutes of day-to-day rounding every published schedule carries. Confirm the current departure time before booking around an older listing.
Source: US DOT Bureau of Transportation Statistics · 611 operations, December 2023 – August 2026 · If OO3918 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where OO3918 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| OO3918 | 86.0% | 0.49% | -10 min | 3.1% | 611 |
| SkyWest Airlines on PDX → SEA | 84.7% | 0.47% | -7 min | 4.2% | 10,603 |
| All PDX → SEA flights | 85.6% | 0.77% | -7 min | 3.8% | 16,846 |
OO3918 cancelled 3 of 611 operations (0.49%), close to the 0.77% for PDX → SEA.
Source: FlyerIntel analysis of US DOT BTS data · December 2023 – August 2026
Why OO3918 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
airspace and airport capacity, including weather-driven flow control
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for OO3918 on PDX → SEA. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering December 2023 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies OO3918 comes in late, and what that does to the departure.
The aircraft flying OO3918 came in 15 or more minutes late on 16% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Matched by tail number to the aircraft’s previous flight into PDX: 602 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 |
|---|---|
| OO3918 | 16% |
| Network, same turn | 18% |
Little slack sits between the inbound landing and this departure, so a late arrival has almost nowhere to go but into the departure.
The network row is every flight with a scheduled turn of 30 to 44 minutes. How often OO3918’s aircraft landed 15 or more minutes late is about the same as the network’s. There are not enough departures in both groups to compare how it left.
Source: US DOT Bureau of Transportation Statistics · Data covering December 2023 – August 2026
From pushback to gate
When it leaves PDX late, does that still matter by the time it reaches SEA?
OO3918 pushes back an average of 3.1 minutes late and reaches the gate at SEA an average of 2.7 minutes early. The 5.8 minutes between those two figures are slack the published schedule already carries, so on average a late pushback on this flight is made up before the gate. It spends 20.8 minutes on the taxiways at PDX, 4.5 minutes longer than a typical PDX departure in the same hour.
On arrival at SEA, OO3918 spends 10.4 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 1.6 minutes shorter than a typical SEA arrival (11.9 min).
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 15,272 PDX departures. Taxi-in is landing to gate, set against 526,096 arrivals at SEA. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · December 2023 – August 2026
The hour it leaves PDX
OO3918 has one departure time, 5:15 PM, so this is what that hour at PDX is worth.
On-time arrival rate. 15,272 departures from PDX are scheduled in the 5 PM–6 PM hour over the period, against 193,820 across the whole day.
OO3918 is scheduled out of PDX at 5:15 PM, in the 5 PM–6 PM bank. Departures from PDX in that hour arrive on time 79.3% of the time against 83.1% across the airport’s whole day — the slot alone is worth 3.8 points worse before anything about this particular flight is considered.
Both airport figures cover every destination from PDX, 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 · December 2023 – August 2026 · Hours below 120 departures are not scored.
Other routes OO3918 has flown
Carriers reassign flight numbers. OO3918 also served these 20 other city pairs in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| SEA→PDX Seattle to Portland | December 16, 2023 – August 31, 2026 | 610 | 83.5% |
| ATL→OAJ Atlanta to Richlands | April 13, 2026 – May 6, 2026 | 24 | — |
| DTW→GRR Detroit to Grand Rapids | June 7, 2024 – January 4, 2026 | 179 | 72.1% |
| GRR→DTW Grand Rapids to Detroit | June 7, 2024 – December 18, 2024 | 153 | 79.1% |
| DTW→BHM Detroit to Birmingham | September 9, 2024 – October 6, 2024 | 28 | — |
| FWA→ATL Fort Wayne to Atlanta | May 7, 2024 – June 6, 2024 | 31 | — |
| ORD→DTW Chicago to Detroit | April 9, 2024 – May 6, 2024 | 28 | — |
| ATL→BQK Atlanta to Brunswick | January 8, 2024 – March 9, 2024 | 58 | — |
| BQK→ATL Brunswick to Atlanta | January 8, 2024 – March 9, 2024 | 58 | — |
| MSP→RST Minneapolis to Rochester | November 11, 2023 – December 15, 2023 | 24 | — |
| RST→MSP Rochester to Minneapolis | November 11, 2023 – December 15, 2023 | 20 | — |
| TUS→SLC Tucson to Salt Lake City | October 28, 2023 – November 4, 2023 | 8 | — |
| PIT→MSP Pittsburgh to Minneapolis | September 5, 2023 – October 8, 2023 | 34 | — |
| SDF→DTW Louisville to Detroit | August 8, 2023 – September 4, 2023 | 28 | — |
| ATL→GTR Atlanta to Columbus/W Point/Starkville | July 10, 2023 – August 6, 2023 | 24 | — |
| GTR→ATL Columbus/W Point/Starkville to Atlanta | July 10, 2023 – August 6, 2023 | 24 | — |
| GRR→MSP Grand Rapids to Minneapolis | July 15–29, 2023 | 3 | — |
| MSP→GRR Minneapolis to Grand Rapids | July 15–29, 2023 | 3 | — |
| ONT→SLC Ontario to Salt Lake City | July 5–9, 2023 | 5 | — |
| SLC→ONT Salt Lake City to Ontario | July 5–9, 2023 | 5 | — |
The figures above describe only PDX → SEA, the route OO3918 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
20 min late
against a median of 10 min early
Percentiles over 611 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering December 2023 – August 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| OO3918 this flight | SkyWest Airlines | 86.0% | 10 min early | 611 |
| OO3953 | SkyWest Airlines | 84.9% | 11 min early | 974 |
| OO3802 | SkyWest Airlines | 84.7% | 7 min early | 873 |
| OO3913 | SkyWest Airlines | 82.5% | 8 min early | 605 |
Among all 4 departures on this route with at least 600 operations, OO3918 has the highest on-time rate. Every departure here has at least 600 operations; the other rows are the most punctual on the route, not all of them.
Data and methodology
Calculated by FlyerIntel from 611 records of OO3918 operating PDX → SEA, 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