Flight number record
OO 5404
SkyWest Airlines · Springfield to Denver
- Route
- SGF → DEN
- Departs
- 17:07
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 363 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so OO 5404 runs 10 points behind the country as a whole. Across a thousand flights that is about 98 extra late arrivals.
Key figures
On time
67.5%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.89%
1 hour+ late
16.0%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 16.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 363 flights, with 17:01 (81 flights) and 17:03 (56 flights) next.
- Departs 17:0789 flights24.5%
- Departs 17:0181 flights22.3%
- Departs 17:0356 flights15.4%
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 17:07 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 5404 runs level with that at 67.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
OO 5404 next to SGF to DEN
Every carrier on SGF to DEN combined arrived on time 80.5% of the time across 1,319 flights, so OO 5404 is 13 points behind it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5404thin sample | 363 | 67.5% | 75 min | 1.10% | C |
| All SkyWest Airlines on SGF–DEN | 1,319 | 80.5% | 80 min | 0.68% | B+ |
| All carriers on SGF–DEN | 1,319 | 80.5% | 80 min | 0.68% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | 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 2026 at 48.3%, a swing of 30 points on roughly 73 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 202530 flights56.7%
- Oct–Dec 202591 flights75.8%
- Jan–Mar 202690 flights78.4%
- Apr–Jun 202691 flights64.4%
- Jul–Sep 202661 flights48.3%
Scale runs 40% to 85%.
By weekday, OO 5404 did best on Tuesday at 74.0% on time and worst on Wednesday at 59.6%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5404 runs when it is late
The 116 late arrivals split 25 under half an hour, 34 between 30 and 60 minutes, and 57 an hour or more.
- 15+ min early55 flights15.4%
- Within 15 min186 flights52.1%
- 15–29 min late25 flights7.0%
- 30–59 min late34 flights9.5%
- 1–2 hours late34 flights9.5%
- 2+ hours late23 flights6.4%
Scale runs 0% to 100%.
Share of 357 completed flights by arrival against schedule.
15 of 104 late departures made up the time and arrived on time, 14% of them. In the other direction, 27 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 DEN.
The worst days
Worst days for OO 5404
The latest arrival of the period was on 21 August 2026, 4 hours 7 minutes behind schedule; most of its delay minutes were filed as extreme weather. Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 August 2026 | 4 hours 7 minutes | Extreme weather |
| 15 March 2026 | 3 hours 54 minutes | Late-arriving aircraft |
| 24 August 2026 | 3 hours 33 minutes | National Airspace System |
| 25 January 2026 | 3 hours 31 minutes | Late-arriving aircraft |
| 26 August 2026 | 3 hours 14 minutes | National Airspace System |
Delay causes
Why OO 5404 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 8,678 reported delay minutes.
- 40%National Airspace System
- 27%Late-arriving aircraft
- 18%Extreme weather
- 15%Carrier
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 3.0 times the usual weather exposure. The split is drawn from 8,678 delay minutes reported on OO 5404.
Cancellations sit at 1.10% against a national 1.89%, which is ordinary. Diversions add another 0.55%.
Connections and routes
What a delay on this flight costs
16.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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.
Every one of the 363 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. 363 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. 16.0% 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 route86.1%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.