Flight number record
OO 5455
SkyWest Airlines · Peoria to Denver
- Route
- PIA → DEN
- Departs
- 09:00
- Flights
- 342
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5455, 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 5455 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 342 flights, with a median arrival 1 minute late.
The national on-time rate over the same period is 77.6%, so OO 5455 runs 8 points behind the country as a whole. Across a thousand flights that is about 75 extra late arrivals.
Key figures
On time
70.1%
Arrivals under 15 minutes late, of 335 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
1.75%
National rate is 1.81%
1 hour+ late
10.7%
National rate is 8.1%
These figures cover 342 flights between July 2025 and June 2026. Beyond the headline rate, 10.7% 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 5455 flies
OO 5455 flies PIA to DEN without a single fixed slot. Its most common scheduled departure was 09:00, used on 94 of 342 flights, with 08:45 (55 flights) and 08:35 (55 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 09:0094 flights27.5%
- Departs 08:4555 flights16.1%
- Departs 08:3555 flights16.1%
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 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 5455 runs 14 points worse at 70.1%. 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 5455 next to PIA to DEN
Every carrier on PIA to DEN combined arrived on time 71.7% of the time across 433 flights, so OO 5455 is 2 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5455thin sample | 342 | 70.1% | 66 min | 1.75% | C |
| All SkyWest Airlines on PIA–DEN | 365 | 71.5% | 66 min | 1.64% | C |
| All carriers on PIA–DEN | 433 | 71.7% | 69 min | 1.62% | C |
| SkyWest Airlines, whole network | 852,935 | 79.0% | 88 min | 1.77% | B |
Across the year
OO 5455 quarter by quarter
OO 5455 did not run the same all year. Its best quarter was Apr–Jun 2026 at 90.0% on time and its weakest Jan–Mar 2026 at 43.0%, a swing of 47 points on roughly 86 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 202569 flights72.5%
- Oct–Dec 202592 flights74.4%
- Jan–Mar 202690 flights43.0%
- Apr–Jun 202691 flights90.0%
Scale runs 35% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5455 did best on Sunday at 78.7% on time and worst on Friday at 59.2%. Each day rests on about 49 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Delay causes
Why OO 5455 runs late
One category carries most of the weight here. Carrier accounts for 79% of the 6,625 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.
- 79%Carrier
- 17%National Airspace System
- 4%Extreme weather
The largest share of delay minutes, 79%, 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 5,248 of the 6,625 delay minutes reported here. The split is drawn from 6,625 delay minutes reported on OO 5455.
Cancellations sit at 1.75% against a national 1.81%, which is ordinary. Diversions add another 0.29%.
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. 10.7% 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 793 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 one other city pair in the data, including ORD to BHM (1), but none flew often enough under OO 5455 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to PIA to DEN only.
One caution: this is a thin sample. 342 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 5455
For a booking, read OO 5455 as 70.1% on time with 1.75% cancelled over 342 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- Denver International (DEN) 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
- How often a connection fails at the major US hubs
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.