Flight number record

OO 3770

SkyWest Airlines · Medford to Seattle

Route: MFR → SEA
Departs: 17:30
Flights: 346
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 346 flights, with a median arrival 14 minutes early.

Set against the rest of the country, OO 3770's record is 16 points better than the US average of 77.6%. That gap is worth roughly 157 fewer late arrivals for every thousand flights.

On time

93.3%

Arrivals under 15 minutes late, of 344 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

0.58%

National rate is 1.81%

1 hour+ late

2.3%

National rate is 8.1%

These figures cover 346 flights between July 2025 and June 2026. The median arrival is 14 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.

Schedule

When OO 3770 flies

OO 3770 flies MFR to SEA without a single fixed slot. Its most common scheduled departure was 17:30, used on 105 of 346 flights, with 17:25 (55 flights) and 17:23 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:30105 flights30.3%
Departs 17:2555 flights15.9%
Departs 17:2339 flights11.3%

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 17:30 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 3770 runs 25 points better at 93.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 3770 next to MFR to SEA

Every carrier on MFR to SEA combined arrived on time 91.0% of the time across 1,244 flights, so OO 3770 is 2 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 14 points.

OO 3770 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3770thin sample	346	93.3%	61 min	0.58%	A+
All SkyWest Airlines on MFR–SEA	1,244	91.0%	78 min	1.21%	A
All carriers on MFR–SEA	1,244	91.0%	78 min	1.21%	A
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3770 quarter by quarter

Quarter by quarter OO 3770 held fairly steady: 93.3% in Jul–Sep 2025, 96.6% in Oct–Dec 2025, 92.1% in Jan–Mar 2026 and 91.2% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202589 flights93.3%
Oct–Dec 202588 flights96.6%
Jan–Mar 202678 flights92.1%
Apr–Jun 202691 flights91.2%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3770 did best on Saturday at 100.0% on time and worst on Friday at 85.4%. Each day rests on about 49 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 3770 runs late

One category carries most of the weight here. Carrier accounts for 72% of the 1,413 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
72%
Extreme weather
20%
National Airspace System
8%

Extreme weather accounts for 20% 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 3.3 times the usual weather exposure. The split is drawn from 1,413 delay minutes reported on OO 3770.

Cancellations are rare at 0.58%, below the national 1.81% 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 2.3% land an hour or more behind schedule, against 8.1% 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 (330 flights, 91.5% 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. 346 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.

Other routes flown as OO 3770
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SEA to MFRthin sample	330	91.5%	63 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: 93.3% on time and 0.58% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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.

Key figures