Flight number record
OO 3770
SkyWest Airlines · Medford to Seattle
- Route
- MFR → SEA
- Departs
- 17:25
- Flights
- 348
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3770, 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 3770 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 348 flights, with a median arrival 15 minutes early.
Set against the rest of the country, OO 3770's record is 15 points better than the US average of 77.3%. That gap is worth roughly 149 fewer late arrivals for every thousand flights.
Key figures
On time
92.2%
Arrivals under 15 minutes late, of 346 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
0.57%
National rate is 1.89%
1 hour+ late
2.9%
National rate is 8.3%
These figures cover 348 flights between September 2025 and August 2026. The median arrival is 15 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When OO 3770 flies
OO 3770 flies MFR to SEA without a single fixed slot. Its most common scheduled departure was 17:25, used on 60 of 348 flights, with 17:24 (59 flights) and 17:28 (53 flights) next.
- Departs 17:2560 flights17.2%
- Departs 17:2459 flights17.0%
- Departs 17:2853 flights15.2%
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 17:25 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 3770 runs 24 points better at 92.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
OO 3770 next to MFR to SEA
Every carrier on MFR to SEA combined arrived on time 89.4% of the time across 1,321 flights, so OO 3770 is 3 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 14 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3770thin sample | 348 | 92.2% | 67 min | 0.57% | A+ |
| All SkyWest Airlines on MFR–SEA | 1,321 | 89.4% | 66 min | 1.21% | A |
| All carriers on MFR–SEA | 1,321 | 89.4% | 66 min | 1.21% | A |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3770 quarter by quarter
OO 3770 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Jul–Sep 2026 at 83.6%, a swing of 16 points on roughly 70 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 202530 flights100.0%
- Oct–Dec 202588 flights96.6%
- Jan–Mar 202678 flights92.1%
- Apr–Jun 202691 flights91.2%
- Jul–Sep 202661 flights83.6%
Scale runs 75% to 100%.
By weekday, OO 3770 did best on Saturday at 100.0% on time and worst on Friday at 87.8%. Each day rests on about 50 flights, so a gap of 12 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 3770 runs when it is late
OO 3770 often beats the schedule: 182 of 346 completed flights, 53%, arrived 15 minutes or more early. The 27 late arrivals split 5 under half an hour, 12 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early182 flights52.6%
- Within 15 min137 flights39.6%
- 15–29 min late5 flights1.4%
- 30–59 min late12 flights3.5%
- 1–2 hours late5 flights1.4%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 346 completed flights by arrival against schedule.
5 of 29 late departures made up the time and arrived on time, 17% of them. Only 3 left on time and still arrived late.
The worst days
Worst days for OO 3770
The latest arrival of the period was on 7 May 2026, 2 hours 41 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 May 2026 | 2 hours 41 minutes | Carrier |
| 16 July 2026 | 2 hours 37 minutes | Extreme weather |
| 15 July 2026 | 2 hours 34 minutes | Carrier |
| 2 January 2026 | 2 hours 13 minutes | Extreme weather |
| 14 August 2026 | 2 hours 3 minutes | Carrier |
Delay causes
Why OO 3770 runs late
Carrier accounts for 70% of the 1,799 delay minutes carriers reported here, and the remaining four split what is left.
- 70%Carrier
- 29%Extreme weather
- 1%National Airspace System
Extreme weather accounts for 29% 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 4.8 times the usual weather exposure. The split is drawn from 1,799 delay minutes reported on OO 3770.
Cancellations are rare at 0.57%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.9% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
OO 3770 is not only a MFR to SEA flight. It also flew SEA to MFR (332 flights, 90.9% 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. 348 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 MFRthin sample | 332 | 90.9% | 67 min | 0.30% | A+ |
What to do with this
Booking OO 3770
For a booking, OO 3770 has one of the better records a US domestic flight can show: 92.2% on time and 0.57% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- MFR to SEA, every carrier and departure
- SEA to MFR, the return direction
- SkyWest Airlines 3781 on the same route97.6%
- 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
- Worst months to fly in the US, ranked by the data
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.