Flight number record

OO 4033

SkyWest Airlines · Atlanta to South Bend

Route: ATL → SBN
Departs: 14:24
Flights: 308
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4033, 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 4033 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 308 flights, with a median arrival 6 minutes early.

On time

73.9%

Arrivals under 15 minutes late, of 303 completed flights

Avg delay

83 min

Across delayed arrivals only, not all flights

Cancelled

1.30%

National rate is 1.81%

1 hour+ late

10.9%

National rate is 8.1%

These figures cover 308 flights between July 2025 and June 2026. Beyond the headline rate, 10.9% 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 4033 flies

OO 4033 flies ATL to SBN without a single fixed slot. Its most common scheduled departure was 14:24, used on 56 of 308 flights, with 14:20 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:2456 flights18.2%
Departs 14:2031 flights10.1%

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 14:24 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 4033 runs level with that at 73.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 4033 next to ATL to SBN

Every carrier on ATL to SBN combined arrived on time 74.2% of the time across 1,028 flights, so OO 4033 is about level with it. SkyWest flew 1,027 flights on the same city pair under all its flight numbers, including this one, and those ran 74.2% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 5 points.

OO 4033 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4033thin sample	308	73.9%	83 min	1.30%	C
All SkyWest Airlines on ATL–SBN	1,027	74.2%	104 min	1.85%	C
All carriers on ATL–SBN	1,028	74.2%	104 min	1.85%	C
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4033 quarter by quarter

OO 4033 did not run the same all year. Its best quarter was Oct–Dec 2025 at 82.4% on time and its weakest Jan–Mar 2026 at 57.5%, a swing of 25 points on roughly 77 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 202581 flights75.3%
Oct–Dec 202576 flights82.4%
Jan–Mar 202674 flights57.5%
Apr–Jun 202677 flights80.0%

Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4033 did best on Wednesday at 83.0% on time and worst on Monday at 64.7%. Each day rests on about 44 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4033 runs late

One category carries most of the weight here. Carrier accounts for 71% of the 6,588 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.

Carrier
71%
Extreme weather
16%
National Airspace System
13%

Extreme weather accounts for 16% 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 2.5 times the usual weather exposure. The split is drawn from 6,588 delay minutes reported on OO 4033.

Cancellations sit at 1.30% against a national 1.81%, which is ordinary. Diversions add another 0.32%.

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. 10.9% 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 566 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.

OO 4033 is not only a ATL to SBN flight. It also flew SBN to ATL (308 flights, 67.7% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 308 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.

Other routes flown as OO 4033
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SBN to ATLthin sample	308	67.7%	115 min	1.62%	C

What to do with this

Booking OO 4033

For a booking, read OO 4033 as 73.9% on time with 1.30% cancelled over 308 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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