Flight number record
OO 5217
SkyWest Airlines · Spokane to San Francisco
- Route
- GEG → SFO
- Departs
- 12:35
- Flights
- 315
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5217, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
OO 5217 lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 315 flights, with a median arrival 12 minutes early.
Key figures
On time
80.9%
Arrivals under 15 minutes late, of 314 completed flights
Avg delay
114 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
8.9%
National rate is 8.1%
These figures cover 315 flights between July 2025 and June 2026. Beyond the headline rate, 8.9% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When OO 5217 flies
OO 5217 flies GEG to SFO without a single fixed slot. Its most common scheduled departure was 12:35, used on 96 of 315 flights, with 12:37 (41 flights) and 15:28 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 12:3596 flights30.5%
- Departs 12:3741 flights13.0%
- Departs 15:2841 flights13.0%
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 12:35 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 5217 runs 2 points better at 80.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
OO 5217 next to GEG to SFO
Every carrier on GEG to SFO combined arrived on time 73.7% of the time across 873 flights, so OO 5217 is 7 points ahead of it. SkyWest flew 821 flights on the same city pair under all its flight numbers, including this one, and those ran 73.8% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5217thin sample | 315 | 80.9% | 114 min | 0.00% | B+ |
| All SkyWest Airlines on GEG–SFO | 821 | 73.8% | 77 min | 0.12% | C+ |
| All carriers on GEG–SFO | 873 | 73.7% | 75 min | 0.11% | C+ |
| SkyWest Airlines, whole network | 852,935 | 79.0% | 88 min | 1.77% | B |
Across the year
OO 5217 quarter by quarter
OO 5217 did not run the same all year. Its best quarter was Jul–Sep 2025 at 92.9% on time and its weakest Apr–Jun 2026 at 69.9%, a swing of 23 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 202584 flights92.9%
- Oct–Dec 202577 flights83.1%
- Jan–Mar 202670 flights77.1%
- Apr–Jun 202684 flights69.9%
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5217 did best on Tuesday at 89.1% on time and worst on Wednesday at 76.0%. Each day rests on about 45 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Delay causes
Why OO 5217 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 6,858 reported delay minutes.
- 34%National Airspace System
- 25%Carrier
- 23%Extreme weather
- 19%Late-arriving aircraft
Extreme weather accounts for 23% 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 3.6 times the usual weather exposure. The split is drawn from 6,858 delay minutes reported on OO 5217.
Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
8.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last close to two hours, which a normal layover absorbs.
The 733 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.
The same number turns up on six other city pairs in the data, including DEN to AUS (18), ORD to GRR (5) and PDX to SFO (5), but none flew often enough under OO 5217 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to GEG to SFO only.
One caution: this is a thin sample. 315 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 OO 5217
For a booking, read OO 5217 as 80.9% on time with 0.00% cancelled over 315 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- GEG to SFO, every carrier and departure
- SFO to GEG, the return direction
- San Francisco International (SFO) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- The best time of day to fly, according to 7.04 million flight records
A flight number here means SkyWest Airlines’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.