Flight number record
UA 2683
United Airlines · Chicago to San Diego
- Route
- ORD → SAN
- Departs
- 13:00
- Flights
- 311
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2683, check with United Airlines.
UA 2683 lands a B+, about a point better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 311 flights, with a median arrival 7 minutes early.
Key figures
On time
78.7%
Arrivals under 15 minutes late, of 310 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
0.32%
National rate is 1.89%
1 hour+ late
6.5%
National rate is 8.3%
These figures cover 311 flights between September 2025 and August 2026. The median arrival is 7 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.
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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 151 of 311 flights, with 13:30 (82 flights) and 13:01 (42 flights) next.
- Departs 13:00151 flights48.6%
- Departs 13:3082 flights26.4%
- Departs 13:0142 flights13.5%
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 13:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 2683 runs level with that at 78.7%. 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
UA 2683 next to ORD to SAN
Every carrier on ORD to SAN combined arrived on time 70.5% of the time across 3,945 flights, so UA 2683 is 8 points ahead of it. United flew 1,677 flights on the same city pair under all its flight numbers, including this one, and those ran 76.4% on time. Across its whole network United Airlines managed 78.8%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2683thin sample | 311 | 78.7% | 61 min | 0.32% | B+ |
| All United Airlines on ORD–SAN | 1,677 | 76.4% | 62 min | 0.42% | B+ |
| All carriers on ORD–SAN | 3,945 | 70.5% | 66 min | 1.29% | C |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2683 quarter by quarter
Quarter by quarter UA 2683 held fairly steady: 73.3% in Jul–Sep 2025, 81.1% in Oct–Dec 2025, 79.3% in Jan–Mar 2026, 80.6% in Apr–Jun 2026 and 73.2% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights73.3%
- Oct–Dec 202591 flights81.1%
- Jan–Mar 202687 flights79.3%
- Apr–Jun 202662 flights80.6%
- Jul–Sep 202641 flights73.2%
Scale runs 65% to 85%.
By weekday, UA 2683 did best on Saturday at 90.9% on time and worst on Monday at 68.9%. Each day rests on about 44 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2683 runs when it is late
UA 2683 often beats the schedule: 108 of 310 completed flights, 35%, arrived 15 minutes or more early. The 66 late arrivals split 18 under half an hour, 28 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early108 flights34.8%
- Within 15 min136 flights43.9%
- 15–29 min late18 flights5.8%
- 30–59 min late28 flights9.0%
- 1–2 hours late13 flights4.2%
- 2+ hours late7 flights2.3%
Scale runs 0% to 100%.
Share of 310 completed flights by arrival against schedule.
12 of 60 late departures made up the time and arrived on time, 20% of them. In the other direction, 18 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SAN.
The worst days
Worst days for UA 2683
The latest arrival of the period was on 16 July 2026, 5 hours 25 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across July, October, March, June and January, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 July 2026 | 5 hours 25 minutes | Late-arriving aircraft |
| 20 October 2025 | 4 hours 9 minutes | Late-arriving aircraft |
| 13 March 2026 | 3 hours 44 minutes | Carrier |
| 11 June 2026 | 3 hours 33 minutes | Extreme weather |
| 25 January 2026 | 2 hours 57 minutes | Carrier |
Delay causes
Why UA 2683 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 4,055 reported delay minutes.
- 37%Late-arriving aircraft
- 28%National Airspace System
- 25%Carrier
- 11%Extreme weather
37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,055 reported delay minutes here, that single category outweighs weather by 3 to one. The split is drawn from 4,055 delay minutes reported on UA 2683.
Cancellations are rare at 0.32%, 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
6.5% of arrivals land an hour or more late, close to the national 8.3%, so 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), MCO to ORD (128) and PIT to ORD (55), 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. 311 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 78.7% on time with 0.32% cancelled over 311 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ORD to SAN, every carrier and departure
- SAN to ORD, the return direction
- United Airlines 660 on the same route82.2%
- Alaska Airlines 1470 on the same route76.1%
- Alaska Airlines 1447 on the same route68.4%
- Chicago O'Hare International (ORD) delay statistics
- San Diego International (SAN) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.