Flight number record

UA 2163

United Airlines · Washington to San Diego

Route: IAD → SAN
Departs: 12:40
Flights: 257
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2163, check with United Airlines.

UA 2163 lands a B+, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 257 flights, with a median arrival 12 minutes early.

Set against the rest of the country, UA 2163's record is 6 points better than the US average of 77.3%. That gap is worth roughly 55 fewer late arrivals for every thousand flights.

On time

82.8%

Arrivals under 15 minutes late, of 256 completed flights

Avg delay

58 min

Across delayed arrivals only, not all flights

Cancelled

0.39%

National rate is 1.89%

1 hour+ late

4.7%

National rate is 8.3%

These figures cover 257 flights between September 2025 and August 2026. The median arrival is 12 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.

Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Schedule

When UA 2163 flies

UA 2163 flies IAD to SAN without a single fixed slot. Its most common scheduled departure was 12:40, used on 81 of 257 flights, with 12:35 (74 flights) and 12:55 (37 flights) next.

Departs 12:4081 flights31.5%
Departs 12:3574 flights28.8%
Departs 12:5537 flights14.4%

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 12:40 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 2163 runs 5 points better at 82.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Against the route

UA 2163 next to IAD to SAN

Every carrier on IAD to SAN combined arrived on time 82.9% of the time across 1,402 flights, so UA 2163 is about level with it. United flew 1,041 flights on the same city pair under all its flight numbers, including this one, and those ran 86.1% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 4 points.

UA 2163 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2163thin sample	257	82.8%	58 min	0.39%	B+
All United Airlines on IAD–SAN	1,041	86.1%	65 min	0.67%	A+
All carriers on IAD–SAN	1,402	82.9%	58 min	0.71%	B+
United Airlines, whole network	830,825	78.8%	73 min	1.02%	B

Across the year

UA 2163 quarter by quarter

Quarter by quarter UA 2163 held fairly steady: 87.6% in Jan–Mar 2026, 83.5% in Apr–Jun 2026 and 80.6% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Oct–Dec 202514 flights—
Jan–Mar 202690 flights87.6%
Apr–Jun 202691 flights83.5%
Jul–Sep 202662 flights80.6%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2163 did best on Sunday at 94.4% on time and worst on Tuesday at 72.2%. Each day rests on about 37 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late UA 2163 runs when it is late

UA 2163 often beats the schedule: 118 of 256 completed flights, 46%, arrived 15 minutes or more early. Most of the lateness is short. 22 of the 44 late arrivals were under half an hour behind, and 12 reached an hour or more.

15+ min early118 flights46.1%
Within 15 min94 flights36.7%
15–29 min late22 flights8.6%
30–59 min late10 flights3.9%
1–2 hours late7 flights2.7%
2+ hours late5 flights2.0%

Scale runs 0% to 100%.

Share of 256 completed flights by arrival against schedule.

A late pushback is often recovered here: of 40 departures that left 15 minutes late or more, 15 still arrived on time. In the other direction, 19 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 2163

The latest arrival of the period was on 8 August 2026, 6 hours 24 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.

The latest arrivals of UA 2163 in the period
Date	Arrived late by	Largest filed cause
8 August 2026	6 hours 24 minutes	Late-arriving aircraft
26 January 2026	5 hours 43 minutes	Extreme weather
5 May 2026	2 hours 55 minutes	Late-arriving aircraft
23 January 2026	2 hours 22 minutes	Late-arriving aircraft
21 July 2026	2 hours	National Airspace System

Delay causes

Why UA 2163 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 2,541 reported delay minutes.

National Airspace System
33%
Late-arriving aircraft
30%
Carrier
26%
Extreme weather
11%

Extreme weather accounts for 11% 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 1.9 times the usual weather exposure. The split is drawn from 2,541 delay minutes reported on UA 2163.

Cancellations are rare at 0.39%, 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

Badly late arrivals are rare here: only 4.7% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

At 2,253 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 RDU to IAD (182), IAD to DFW (31) and SAN to SFO (21), but none flew often enough under UA 2163 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAD to SAN only.

One caution: this is a thin sample. 257 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 2163

For a booking, read UA 2163 as 82.8% on time with 0.39% cancelled over 257 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures