Flight number record

OO 5798

SkyWest Airlines · Memphis to Houston

Route: MEM → IAH
Departs: 15:26
Flights: 251
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5798, 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 5798 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 251 flights, with a median arrival right on schedule.

The national on-time rate over the same period is 77.6%, so OO 5798 runs 6 points behind the country as a whole. Across a thousand flights that is about 63 extra late arrivals.

On time

71.3%

Arrivals under 15 minutes late, of 251 completed flights

Avg delay

78 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

9.2%

National rate is 8.1%

These figures cover 251 flights between July 2025 and June 2026. Beyond the headline rate, 9.2% 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 5798 flies

OO 5798 flies MEM to IAH without a single fixed slot. Its most common scheduled departure was 15:26, used on 103 of 251 flights, with 15:23 (41 flights) and 15:31 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:26103 flights41.0%
Departs 15:2341 flights16.3%
Departs 15:3137 flights14.7%

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 15:26 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 5798 runs level with that at 71.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5798 next to MEM to IAH

Every carrier on MEM to IAH combined arrived on time 80.1% of the time across 1,082 flights, so OO 5798 is 9 points behind it. SkyWest flew 722 flights on the same city pair under all its flight numbers, including this one, and those ran 77.9% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 8 points.

OO 5798 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5798thin sample	251	71.3%	78 min	0.00%	C+
All SkyWest Airlines on MEM–IAH	722	77.9%	79 min	0.69%	B+
All carriers on MEM–IAH	1,082	80.1%	71 min	1.02%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5798 quarter by quarter

OO 5798 did not run the same all year. Its best quarter was Jul–Sep 2025 at 77.2% on time and its weakest Apr–Jun 2026 at 66.1%, a swing of 11 points on roughly 84 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 flights77.2%
Oct–Dec 202592 flights67.4%
Jan–Mar 20265 flights—
Apr–Jun 202662 flights66.1%

Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5798 did best on Tuesday at 77.8% on time and worst on Thursday at 61.1%. Each day rests on about 36 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5798 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 5,637 reported delay minutes.

Late-arriving aircraft
40%
Carrier
37%
National Airspace System
18%
Extreme weather
5%

40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,637 reported delay minutes here, that single category outweighs weather by 8 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,637 delay minutes reported on OO 5798.

Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

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. 9.2% 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 same number turns up on three other city pairs in the data, including DEN to MCI (55), ORD to PIA (15) and DEN to MKE (6), but none flew often enough under OO 5798 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MEM to IAH only.

One caution: this is a thin sample. 251 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 5798

For a booking, OO 5798 is one of the weaker ways to fly MEM to IAH: 9 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

Where to go next

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.

Key figures