Flight number record

OO 5587

SkyWest Airlines · Monterey to Denver

Route: MRY → DEN
Departs: 05:00
Flights: 322
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5587, 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 5587 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 19 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 322 flights, with a median arrival 16 minutes early.

Set against the rest of the country, OO 5587's record is 19 points better than the US average of 77.6%. That gap is worth roughly 193 fewer late arrivals for every thousand flights.

On time

96.9%

Arrivals under 15 minutes late, of 321 completed flights

Avg delay

115 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

1.9%

National rate is 8.1%

These figures cover 322 flights between July 2025 and June 2026. The median arrival is 16 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 5587 flies

OO 5587 flies MRY to DEN without a single fixed slot. Its most common scheduled departure was 05:00, used on 171 of 322 flights, with 05:15 (85 flights) and 05:05 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 05:00171 flights53.1%
Departs 05:1585 flights26.4%
Departs 05:0535 flights10.9%

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 05:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 5587 runs 8 points better at 96.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 5587 next to MRY to DEN

Every carrier on MRY to DEN combined arrived on time 93.1% of the time across 729 flights, so OO 5587 is 4 points ahead of it. SkyWest flew 688 flights on the same city pair under all its flight numbers, including this one, and those ran 93.3% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 18 points.

OO 5587 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5587thin sample	322	96.9%	115 min	0.00%	A+
All SkyWest Airlines on MRY–DEN	688	93.3%	72 min	0.15%	A+
All carriers on MRY–DEN	729	93.1%	81 min	0.27%	A+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5587 quarter by quarter

Quarter by quarter OO 5587 held fairly steady: 96.7% in Jul–Sep 2025, 96.7% in Oct–Dec 2025, 96.6% in Jan–Mar 2026 and 98.0% in Apr–Jun 2026. A spread of about a point is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights96.7%
Oct–Dec 202592 flights96.7%
Jan–Mar 202689 flights96.6%
Apr–Jun 202650 flights98.0%

Scale runs 90% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5587 ranged from 91.3% on Saturday to 100.0% on Thursday. With about 46 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 5587 runs late

One category carries most of the weight here. Carrier accounts for 49% of the 1,154 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
49%
Late-arriving aircraft
25%
National Airspace System
20%
Extreme weather
5%

The largest share of delay minutes, 49%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 570 of the 1,154 delay minutes reported here. The split is drawn from 1,154 delay minutes reported on OO 5587.

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

Badly late arrivals are rare here: only 1.9% 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.

The 959 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 three other city pairs in the data, including OMA to ORD (32), ORD to CMH (2) and OKC to IAH (1), but none flew often enough under OO 5587 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MRY to DEN only.

One caution: this is a thin sample. 322 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 5587

For a booking, OO 5587 has one of the better records a US domestic flight can show: 96.9% on time and 0.00% 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