Flight number record

UA 1930

United Airlines · Washington to San Diego

Route: IAD → SAN
Departs: 09:00
Flights: 334
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1930, check with United Airlines.

UA 1930 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 55 minutes. That rests on 334 flights, with a median arrival 14 minutes early.

Set against the rest of the country, UA 1930's record is 16 points better than the US average of 77.6%. That gap is worth roughly 157 fewer late arrivals for every thousand flights.

On time

93.3%

Arrivals under 15 minutes late, of 329 completed flights

Avg delay

54 min

Across delayed arrivals only, not all flights

Cancelled

0.60%

National rate is 1.81%

1 hour+ late

2.1%

National rate is 8.1%

These figures cover 334 flights between July 2025 and June 2026. The median arrival is 14 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 1930 flies

UA 1930 flies IAD to SAN without a single fixed slot. Its most common scheduled departure was 09:00, used on 186 of 334 flights, with 08:35 (48 flights) and 08:31 (43 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:00186 flights55.7%
Departs 08:3548 flights14.4%
Departs 08:3143 flights12.9%

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 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and UA 1930 runs 9 points better at 93.3%. 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

UA 1930 next to IAD to SAN

Every carrier on IAD to SAN combined arrived on time 83.6% of the time across 1,400 flights, so UA 1930 is 10 points ahead of it. United flew 1,040 flights on the same city pair under all its flight numbers, including this one, and those ran 87.1% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 14 points.

UA 1930 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1930thin sample	334	93.3%	54 min	0.60%	A+
All United Airlines on IAD–SAN	1,040	87.1%	65 min	0.38%	A+
All carriers on IAD–SAN	1,400	83.6%	58 min	0.43%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1930 quarter by quarter

Quarter by quarter UA 1930 held fairly steady: 93.3% in Jul–Sep 2025, 94.4% in Oct–Dec 2025, 95.6% in Jan–Mar 2026 and 90.1% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights93.3%
Oct–Dec 202591 flights94.4%
Jan–Mar 202671 flights95.6%
Apr–Jun 202681 flights90.1%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1930 ranged from 88.0% on Sunday to 96.2% on Friday. With about 48 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why UA 1930 runs late

One category carries most of the weight here. Carrier accounts for 53% of the 1,195 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
53%
National Airspace System
24%
Late-arriving aircraft
17%
Extreme weather
5%

The largest share of delay minutes, 53%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 637 of the 1,195 delay minutes reported here. The split is drawn from 1,195 delay minutes reported on UA 1930.

Cancellations are rare at 0.60%, 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

Badly late arrivals are rare here: only 2.1% land an hour or more behind schedule, against 8.1% 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.

Every one of the 334 flights under UA 1930 in the data flew IAD to SAN. 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. 334 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 1930

For a booking, UA 1930 has one of the better records a US domestic flight can show: 93.3% on time and 0.60% cancelled. That is a base rate, not a promise about any single 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