Flight number record

OO 4107

SkyWest Airlines · South Bend to Atlanta

Route: SBN → ATL
Departs: 06:00
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4107, 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 4107 lands a B, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 10 minutes early.

Set against the rest of the country, OO 4107's record is 6 points better than the US average of 77.6%. That gap is worth roughly 55 fewer late arrivals for every thousand flights.

On time

83.1%

Arrivals under 15 minutes late, of 356 completed flights

Avg delay

124 min

Across delayed arrivals only, not all flights

Cancelled

1.92%

National rate is 1.81%

1 hour+ late

9.3%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 9.3% 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 4107 flies

OO 4107 flies SBN to ATL without a single fixed slot. Its most common scheduled departure was 06:00, used on 232 of 365 flights, with 06:15 (66 flights) and 06:14 (40 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:00232 flights63.6%
Departs 06:1566 flights18.1%
Departs 06:1440 flights11.0%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4107 runs 6 points worse at 83.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 4107 next to SBN to ATL

Every carrier on SBN to ATL combined arrived on time 77.0% of the time across 1,028 flights, so OO 4107 is 6 points ahead of it. SkyWest flew 1,027 flights on the same city pair under all its flight numbers, including this one, and those ran 77.0% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 4 points.

OO 4107 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4107	365	83.1%	124 min	1.92%	B
All SkyWest Airlines on SBN–ATL	1,027	77.0%	118 min	2.04%	B
All carriers on SBN–ATL	1,028	77.0%	118 min	2.04%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4107 quarter by quarter

OO 4107 did not run the same all year. Its best quarter was Jul–Sep 2025 at 89.1% on time and its weakest Jan–Mar 2026 at 72.9%, a swing of 16 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 flights89.1%
Oct–Dec 202592 flights81.1%
Jan–Mar 202690 flights72.9%
Apr–Jun 202691 flights88.8%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4107 did best on Wednesday at 94.2% on time and worst on Tuesday at 69.2%. Each day rests on about 52 flights, so a gap of 25 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4107 runs late

One category carries most of the weight here. Carrier accounts for 65% of the 7,449 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
65%
Extreme weather
24%
National Airspace System
11%
Security
0%

Extreme weather accounts for 24% 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 3.8 times the usual weather exposure. The split is drawn from 7,449 delay minutes reported on OO 4107.

Cancellations sit at 1.92% 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. 9.3% 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.

Every one of the 365 flights under OO 4107 in the data flew SBN to ATL. 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. 365 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 4107

For a booking, read OO 4107 as 83.1% on time with 1.92% cancelled over 365 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