Flight number record
OO 5404
SkyWest Airlines · Springfield to Denver
- Route
- SGF → DEN
- Departs
- 17:07
- Flights
- 364
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5404, 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 5404 draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 364 flights, with a median arrival 1 minute late.
The national on-time rate over the same period is 77.6%, so OO 5404 runs 12 points behind the country as a whole. Across a thousand flights that is about 122 extra late arrivals.
Key figures
On time
65.4%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.81%
1 hour+ late
17.0%
National rate is 8.1%
These figures cover 364 flights between July 2025 and June 2026. Beyond the headline rate, 17.0% 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 5404 flies
OO 5404 flies SGF to DEN without a single fixed slot. Its most common scheduled departure was 17:07, used on 89 of 364 flights, with 17:03 (56 flights) and 17:10 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 17:0789 flights24.5%
- Departs 17:0356 flights15.4%
- Departs 17:1049 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 17:07 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 5404 runs 3 points worse at 65.4%. 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 5404 next to SGF to DEN
Every carrier on SGF to DEN combined arrived on time 79.6% of the time across 1,285 flights, so OO 5404 is 14 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 14 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5404thin sample | 364 | 65.4% | 78 min | 1.10% | C |
| All SkyWest Airlines on SGF–DEN | 1,285 | 79.6% | 82 min | 0.70% | B+ |
| All carriers on SGF–DEN | 1,285 | 79.6% | 82 min | 0.70% | B+ |
| SkyWest Airlines, whole network | 852,935 | 79.0% | 88 min | 1.77% | B |
Across the year
OO 5404 quarter by quarter
OO 5404 did not run the same all year. Its best quarter was Jan–Mar 2026 at 78.4% on time and its weakest Jul–Sep 2025 at 42.7%, a swing of 36 points on roughly 91 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 202592 flights42.7%
- Oct–Dec 202591 flights75.8%
- Jan–Mar 202690 flights78.4%
- Apr–Jun 202691 flights64.4%
Scale runs 35% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5404 ranged from 60.8% on Friday to 68.6% on Saturday. With about 52 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why OO 5404 runs late
One category carries most of the weight here. National Airspace System accounts for 50% of the 9,727 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.
- 50%National Airspace System
- 23%Late-arriving aircraft
- 20%Carrier
- 8%Extreme weather
50% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 4,868 minutes out of 9,727, against a national NAS share of 21%. The split is drawn from 9,727 delay minutes reported on OO 5404.
Cancellations sit at 1.10% against a national 1.81%, which is ordinary. Diversions add another 0.55%.
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. 17.0% 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 637 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.
Every one of the 364 flights under OO 5404 in the data flew SGF to DEN. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 364 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 5404
For a booking, OO 5404 is a flight to put a long connection behind. 17.0% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- SGF to DEN, every carrier and departure
- DEN to SGF, the return direction
- SkyWest Airlines 5898 on the same route83.9%
- 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.