Flight number record
OO 5290
SkyWest Airlines · Chicago to Boise
- Route
- ORD → BOI
- Departs
- 19:45
- Flights
- 266
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5290, 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 5290 draws a D−. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 266 flights, with a median arrival 3 minutes late.
The national on-time rate over the same period is 77.6%, so OO 5290 runs 14 points behind the country as a whole. Across a thousand flights that is about 141 extra late arrivals.
Key figures
On time
63.5%
Arrivals under 15 minutes late, of 252 completed flights
Avg delay
92 min
Across delayed arrivals only, not all flights
Cancelled
4.51%
National rate is 1.81%
1 hour+ late
17.5%
National rate is 8.1%
These figures cover 266 flights between July 2025 and June 2026. Beyond the headline rate, 17.5% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When OO 5290 flies
OO 5290 flies ORD to BOI without a single fixed slot. Its most common scheduled departure was 19:45, used on 90 of 266 flights, with 19:35 (89 flights) and 19:40 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 19:4590 flights33.8%
- Departs 19:3589 flights33.5%
- Departs 19:4036 flights13.5%
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 19:45 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 5290 runs 5 points worse at 63.5%. 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 5290 next to ORD to BOI
Every carrier on ORD to BOI combined arrived on time 69.1% of the time across 1,108 flights, so OO 5290 is 6 points behind it. SkyWest flew 503 flights on the same city pair under all its flight numbers, including this one, and those ran 62.6% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 16 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5290thin sample | 266 | 63.5% | 92 min | 4.51% | D− |
| All SkyWest Airlines on ORD–BOI | 503 | 62.6% | 87 min | 2.58% | D |
| All carriers on ORD–BOI | 1,108 | 69.1% | 73 min | 1.26% | C |
| SkyWest Airlines, whole network | 852,935 | 79.0% | 88 min | 1.77% | B |
Across the year
OO 5290 quarter by quarter
OO 5290 did not run the same all year. Its best quarter was Jul–Sep 2025 at 69.4% on time and its weakest Jan–Mar 2026 at 55.0%, a swing of 14 points on roughly 67 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 202586 flights69.4%
- Oct–Dec 202566 flights56.5%
- Jan–Mar 202644 flights55.0%
- Apr–Jun 202670 flights67.7%
Scale runs 45% to 75%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5290 did best on Tuesday at 72.2% on time and worst on Friday at 50.0%. Each day rests on about 38 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Delay causes
Why OO 5290 runs late
One category carries most of the weight here. Carrier accounts for 46% of the 8,491 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.
- 46%Carrier
- 28%Late-arriving aircraft
- 23%National Airspace System
- 4%Extreme weather
The largest share of delay minutes, 46%, 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 3,871 of the 8,491 delay minutes reported here. The split is drawn from 8,491 delay minutes reported on OO 5290.
Cancellations run at 4.51%, against 1.81% nationally. That is roughly one flight in twenty 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 17.5% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
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 PIA to ORD (37), SFO to SMF (31) and BTV to ORD (20), but none flew often enough under OO 5290 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to BOI only.
One caution: this is a thin sample. 266 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 5290
For a booking, the cancellation rate is the figure to plan around on OO 5290: 4.51% of its 266 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ORD to BOI, every carrier and departure
- BOI to ORD, the return direction
- Chicago O'Hare International (ORD) 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
- What a cancellation rate actually tells you (and what it hides)
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.