Flight number record
OO 4818
SkyWest Airlines · St. George to Dallas-Fort Worth
- Route
- SGU → DFW
- Departs
- 11:00
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4818, 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 4818 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 349 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.3%, so OO 4818 runs 9 points behind the country as a whole. Across a thousand flights that is about 90 extra late arrivals.
Key figures
On time
68.3%
Arrivals under 15 minutes late, of 344 completed flights
Avg delay
90 min
Across delayed arrivals only, not all flights
Cancelled
0.29%
National rate is 1.89%
1 hour+ late
14.0%
National rate is 8.3%
These figures cover 349 flights between September 2025 and August 2026. Beyond the headline rate, 14.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4818 flies
OO 4818 flies SGU to DFW without a single fixed slot. Its most common scheduled departure was 11:00, used on 87 of 349 flights, with 11:02 (54 flights) and 10:53 (42 flights) next.
- Departs 11:0087 flights24.9%
- Departs 11:0254 flights15.5%
- Departs 10:5342 flights12.0%
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 11:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and OO 4818 runs 10 points worse at 68.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 4818 next to SGU to DFW
Every carrier on SGU to DFW combined arrived on time 79.4% of the time across 698 flights, so OO 4818 is 11 points behind it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4818thin sample | 349 | 68.3% | 90 min | 0.29% | C+ |
| All SkyWest Airlines on SGU–DFW | 698 | 79.4% | 104 min | 0.43% | B+ |
| All carriers on SGU–DFW | 698 | 79.4% | 104 min | 0.43% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4818 quarter by quarter
OO 4818 did not run the same all year. Its best quarter was Jul–Sep 2025 at 86.7% on time and its weakest Apr–Jun 2026 at 56.1%, a swing of 31 points on roughly 70 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 flights86.7%
- Oct–Dec 202591 flights72.5%
- Jan–Mar 202690 flights69.7%
- Apr–Jun 202685 flights56.1%
- Jul–Sep 202653 flights67.3%
Scale runs 50% to 90%.
By weekday, OO 4818 did best on Friday at 82.0% on time and worst on Saturday at 60.0%. Each day rests on about 50 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4818 runs when it is late
OO 4818 often beats the schedule: 107 of 344 completed flights, 31%, arrived 15 minutes or more early. The 109 late arrivals split 33 under half an hour, 28 between 30 and 60 minutes, and 48 an hour or more.
- 15+ min early107 flights31.1%
- Within 15 min128 flights37.2%
- 15–29 min late33 flights9.6%
- 30–59 min late28 flights8.1%
- 1–2 hours late27 flights7.8%
- 2+ hours late21 flights6.1%
Scale runs 0% to 100%.
Share of 344 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 111 departures that left 15 minutes late or more, only 12 made it up before arrival. 10 flights left on time and still arrived late.
The worst days
Worst days for OO 4818
The latest arrival of the period was on 19 January 2026, 11 hours 25 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 January 2026 | 11 hours 25 minutes | Carrier |
| 29 June 2026 | 8 hours 56 minutes | Carrier |
| 13 August 2026 | 8 hours 10 minutes | Carrier |
| 20 November 2025 | 7 hours 6 minutes | National Airspace System |
| 15 February 2026 | 6 hours 15 minutes | Late-arriving aircraft |
Delay causes
Why OO 4818 runs late
Carrier accounts for 61% of the 9,824 delay minutes carriers reported here, and the remaining four split what is left.
- 61%Carrier
- 22%Late-arriving aircraft
- 11%National Airspace System
- 6%Extreme weather
The largest share of delay minutes, 61%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 5,999 of the 9,824 delay minutes reported here. The split is drawn from 9,824 delay minutes reported on OO 4818.
Cancellations are rare at 0.29%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
14.0% 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 976 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 349 flights under OO 4818 in the data flew SGU to DFW. 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. 349 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 4818
For a booking, OO 4818 is a flight to put a long connection behind. 14.0% 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
- Dallas/Fort Worth International (DFW) 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
- The best time of day to fly, according to 7.05 million flight records
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.