Flight number record

OO 5386

SkyWest Airlines · Boise to Chicago

Route: BOI → ORD
Departs: 08:20
Flights: 313
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 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 lands a B, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 313 flights, with a median arrival 7 minutes early.

Set against the rest of the country, OO 5386's record is 6 points better than the US average of 77.3%. That gap is worth roughly 64 fewer late arrivals for every thousand flights.

On time

83.7%

Arrivals under 15 minutes late, of 301 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

2.56%

National rate is 1.89%

1 hour+ late

5.3%

National rate is 8.3%

These figures cover 313 flights between September 2025 and August 2026. The median arrival is 7 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 5386 flies

OO 5386 flies BOI to ORD without a single fixed slot. Its most common scheduled departure was 08:20, used on 74 of 313 flights, with 08:15 (53 flights) and 08:25 (46 flights) next.

Departs 08:2074 flights23.6%
Departs 08:1553 flights16.9%
Departs 08:2546 flights14.7%

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 08:20 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 5386 runs level with that at 83.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

OO 5386 next to BOI to ORD

Every carrier on BOI to ORD combined arrived on time 74.9% of the time across 1,111 flights, so OO 5386 is 9 points ahead of it. SkyWest flew 507 flights on the same city pair under all its flight numbers, including this one, and those ran 82.9% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 5 points.

OO 5386 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5386thin sample	313	83.7%	69 min	2.56%	B
All SkyWest Airlines on BOI–ORD	507	82.9%	78 min	2.17%	B
All carriers on BOI–ORD	1,111	74.9%	94 min	1.17%	C
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 5386 quarter by quarter

Quarter by quarter OO 5386 held fairly steady: 89.1% in Oct–Dec 2025, 80.5% in Jan–Mar 2026, 83.8% in Apr–Jun 2026 and 81.0% in Jul–Sep 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 202524 flights—
Oct–Dec 202567 flights89.1%
Jan–Mar 202690 flights80.5%
Apr–Jun 202670 flights83.8%
Jul–Sep 202662 flights81.0%

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

By weekday, OO 5386 did best on Wednesday at 90.7% on time and worst on Monday at 77.8%. Each day rests on about 45 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late OO 5386 runs when it is late

OO 5386 often beats the schedule: 103 of 301 completed flights, 34%, arrived 15 minutes or more early. The 49 late arrivals split 23 under half an hour, 10 between 30 and 60 minutes, and 16 an hour or more.

15+ min early103 flights34.2%
Within 15 min149 flights49.5%
15–29 min late23 flights7.6%
30–59 min late10 flights3.3%
1–2 hours late6 flights2.0%
2+ hours late10 flights3.3%

Scale runs 0% to 100%.

Share of 301 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 27 departures that left 15 minutes late or more, only 3 made it up before arrival. In the other direction, 25 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ORD.

The worst days

Worst days for OO 5386

The latest arrival of the period was on 21 November 2025, 6 hours 44 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as national airspace system delay.

The latest arrivals of OO 5386 in the period
Date	Arrived late by	Largest filed cause
21 November 2025	6 hours 44 minutes	Extreme weather
10 November 2025	4 hours 16 minutes	National Airspace System
16 June 2026	4 hours 4 minutes	Carrier
7 December 2025	3 hours 31 minutes	National Airspace System
11 August 2026	3 hours 12 minutes	National Airspace System

Delay causes

Why OO 5386 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 3,399 reported delay minutes.

Carrier
41%
National Airspace System
37%
Extreme weather
15%
Late-arriving aircraft
7%

Extreme weather accounts for 15% 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 2.5 times the usual weather exposure. The split is drawn from 3,399 delay minutes reported on OO 5386.

Cancellations run at 2.56%, against 1.89% nationally. That is about one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and routes

What a delay on this flight costs

5.3% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

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.

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, the cancellation rate is the figure to plan around on OO 5386: 2.56% of its 313 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.

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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures