Flight number record

UA 2683

United Airlines · Chicago to San Diego

Route: ORD → SAN
Departs: 13:00
Flights: 331
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2683, check with United Airlines.

UA 2683 lands a B+, 2 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 331 flights, with a median arrival 6 minutes early.

On time

80.0%

Arrivals under 15 minutes late, of 330 completed flights

Avg delay

57 min

Across delayed arrivals only, not all flights

Cancelled

0.30%

National rate is 1.81%

1 hour+ late

5.8%

National rate is 8.1%

These figures cover 331 flights between July 2025 and June 2026. The median arrival is 6 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When UA 2683 flies

UA 2683 flies ORD to SAN without a single fixed slot. Its most common scheduled departure was 13:00, used on 111 of 331 flights, with 13:30 (95 flights) and 14:06 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:00111 flights33.5%
Departs 13:3095 flights28.7%
Departs 14:0645 flights13.6%

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 13:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and UA 2683 runs level with that at 80.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 2683 next to ORD to SAN

Every carrier on ORD to SAN combined arrived on time 71.2% of the time across 3,807 flights, so UA 2683 is 9 points ahead of it. United flew 1,672 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 United Airlines managed 79.0%, close to this flight's figure.

UA 2683 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2683thin sample	331	80.0%	57 min	0.30%	B+
All United Airlines on ORD–SAN	1,672	77.0%	64 min	0.30%	B+
All carriers on ORD–SAN	3,807	71.2%	67 min	1.18%	C
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 2683 quarter by quarter

Quarter by quarter UA 2683 held fairly steady: 79.1% in Jul–Sep 2025, 81.1% in Oct–Dec 2025, 79.3% in Jan–Mar 2026 and 80.6% in Apr–Jun 2026. A spread of 2 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights79.1%
Oct–Dec 202591 flights81.1%
Jan–Mar 202687 flights79.3%
Apr–Jun 202662 flights80.6%

Scale runs 70% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2683 did best on Saturday at 93.6% on time and worst on Thursday at 74.5%. Each day rests on about 47 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 2683 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 43% of the 3,726 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.

Late-arriving aircraft
43%
National Airspace System
25%
Carrier
24%
Extreme weather
8%

43% 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 3,726 reported delay minutes here, that single category outweighs weather by 5 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 3,726 delay minutes reported on UA 2683.

Cancellations are rare at 0.30%, below the national 1.81% 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

5.8% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

At 1,723 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

The same number turns up on five other city pairs in the data, including SAN to IAH (137), PIT to ORD (99) and MCO to ORD (66), but none flew often enough under UA 2683 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to SAN only.

One caution: this is a thin sample. 331 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 UA 2683

For a booking, read UA 2683 as 80.0% on time with 0.30% cancelled over 331 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 United 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