Flight number record

OO 5386

SkyWest Airlines · Boise to Chicago

Route: BOI → ORD
Departs: 08:30
Flights: 313
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5386, 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 5386 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 313 flights, with a median arrival 6 minutes early.

Set against the rest of the country, OO 5386's record is 7 points better than the US average of 77.6%. That gap is worth roughly 73 fewer late arrivals for every thousand flights.

On time

84.9%

Arrivals under 15 minutes late, of 304 completed flights

Avg delay

65 min

Across delayed arrivals only, not all flights

Cancelled

1.92%

National rate is 1.81%

1 hour+ late

3.9%

National rate is 8.1%

These figures cover 313 flights between July 2025 and June 2026. The median arrival is 6 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 5386 flies

OO 5386 flies BOI to ORD without a single fixed slot. Its most common scheduled departure was 08:30, used on 87 of 313 flights, with 08:20 (86 flights) and 08:15 (53 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:3087 flights27.8%
Departs 08:2086 flights27.5%
Departs 08:1553 flights16.9%

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 08:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 5386 runs level with that at 84.9%. 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 5386 next to BOI to ORD

Every carrier on BOI to ORD combined arrived on time 75.3% of the time across 1,111 flights, so OO 5386 is 10 points ahead of it. SkyWest flew 507 flights on the same city pair under all its flight numbers, including this one, and those ran 83.6% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 6 points.

OO 5386 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5386thin sample	313	84.9%	65 min	1.92%	B
All SkyWest Airlines on BOI–ORD	507	83.6%	75 min	1.78%	B
All carriers on BOI–ORD	1,111	75.3%	86 min	0.99%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5386 quarter by quarter

Quarter by quarter OO 5386 held fairly steady: 87.1% in Jul–Sep 2025, 89.1% in Oct–Dec 2025, 80.5% in Jan–Mar 2026 and 83.8% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202586 flights87.1%
Oct–Dec 202567 flights89.1%
Jan–Mar 202690 flights80.5%
Apr–Jun 202670 flights83.8%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5386 ranged from 81.8% on Friday to 88.4% on Thursday. With about 45 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 5386 runs late

One category carries most of the weight here. Carrier accounts for 50% of the 2,970 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
50%
National Airspace System
30%
Extreme weather
18%
Late-arriving aircraft
3%

Extreme weather accounts for 18% 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 2.8 times the usual weather exposure. The split is drawn from 2,970 delay minutes reported on OO 5386.

Cancellations sit at 1.92% against a national 1.81%, which is ordinary. Diversions add another 0.96%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.9% 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 1,437 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 LIT to ORD (31), LAX to SAN (15) and ORD to SAT (6), but none flew often enough under OO 5386 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOI to ORD only.

One caution: this is a thin sample. 313 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 5386

For a booking, read OO 5386 as 84.9% on time with 1.92% cancelled over 313 flights. Those are rates from the past twelve months, not a forecast for any particular 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