Flight number record
OO 3707
SkyWest Airlines · San Francisco to Seattle
- Route
- SFO → SEA
- Departs
- 16:37
- Flights
- 331
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3707, 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 3707 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.6%. The late ones land about 45 minutes behind schedule. That rests on 331 flights, with a median arrival 2 minutes late.
The national on-time rate over the same period is 77.6%, so OO 3707 runs 9 points behind the country as a whole. Across a thousand flights that is about 94 extra late arrivals.
Key figures
On time
68.2%
Arrivals under 15 minutes late, of 327 completed flights
Avg delay
44 min
Across delayed arrivals only, not all flights
Cancelled
1.21%
National rate is 1.81%
1 hour+ late
7.3%
National rate is 8.1%
These figures cover 331 flights between July 2025 and June 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.
Schedule
When OO 3707 flies
OO 3707 flies SFO to SEA without a single fixed slot. Its most common scheduled departure was 16:37, used on 41 of 331 flights, with 16:40 (40 flights) and 16:50 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 16:3741 flights12.4%
- Departs 16:4040 flights12.1%
- Departs 16:5035 flights10.6%
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 16:37 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 3707 runs 4 points worse at 68.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
OO 3707 next to SFO to SEA
Every carrier on SFO to SEA combined arrived on time 73.7% of the time across 6,770 flights, so OO 3707 is 6 points behind it. SkyWest flew 1,082 flights on the same city pair under all its flight numbers, including this one, and those ran 72.7% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3707thin sample | 331 | 68.2% | 44 min | 1.21% | C |
| All SkyWest Airlines on SFO–SEA | 1,082 | 72.7% | 50 min | 1.11% | C |
| All carriers on SFO–SEA | 6,770 | 73.7% | 56 min | 1.18% | C |
| SkyWest Airlines, whole network | 852,935 | 79.0% | 88 min | 1.77% | B |
Across the year
OO 3707 quarter by quarter
OO 3707 did not run the same all year. Its best quarter was Jan–Mar 2026 at 80.6% on time and its weakest Apr–Jun 2026 at 44.2%, a swing of 36 points on roughly 83 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 202592 flights75.0%
- Oct–Dec 202580 flights75.3%
- Jan–Mar 202673 flights80.6%
- Apr–Jun 202686 flights44.2%
Scale runs 35% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, OO 3707 did best on Saturday at 87.2% on time and worst on Thursday at 57.1%. Each day rests on about 47 flights, so a gap of 30 points is worth noticing but could still narrow in another year.
Delay causes
Why OO 3707 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 4,617 reported delay minutes.
- 41%Carrier
- 36%National Airspace System
- 23%Extreme weather
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 3.7 times the usual weather exposure. The split is drawn from 4,617 delay minutes reported on OO 3707.
Cancellations sit at 1.21% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
7.3% 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 about 45 minutes, which a normal layover absorbs.
The 679 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.
OO 3707 is not only a SFO to SEA flight. It also flew SEA to SFO (325 flights, 74.8% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 331 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SEA to SFOthin sample | 325 | 74.8% | 46 min | 1.23% | C |
What to do with this
Booking OO 3707
For a booking, OO 3707 is one of the weaker ways to fly SFO to SEA: 6 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- SFO to SEA, every carrier and departure
- SEA to SFO, the return direction
- Delta Air Lines 2721 on the same route96.2%
- Delta Air Lines 1412 on the same route76.4%
- SkyWest Airlines 3991 on the same route70.7%
- Alaska Airlines 1327 on the same route62.2%
- San Francisco International (SFO) delay statistics
- Seattle-Tacoma International (SEA) 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.