Flight number record

UA 2210

United Airlines · Los Angeles to Boston

Route: LAX → BOS
Departs: 23:59
Flights: 348
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2210, check with United Airlines.

UA 2210 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 45 minutes. That rests on 348 flights, with a median arrival 15 minutes early.

Set against the rest of the country, UA 2210's record is 13 points better than the US average of 77.3%. That gap is worth roughly 134 fewer late arrivals for every thousand flights.

On time

90.7%

Arrivals under 15 minutes late, of 344 completed flights

Avg delay

45 min

Across delayed arrivals only, not all flights

Cancelled

1.15%

National rate is 1.89%

1 hour+ late

2.6%

National rate is 8.3%

These figures cover 348 flights between September 2025 and August 2026. The median arrival is 15 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 2210 flies

UA 2210 flies LAX to BOS without a single fixed slot. Its most common scheduled departure was 23:59, used on 52 of 348 flights, with 22:43 (38 flights) and 22:51 (37 flights) next.

Departs 23:5952 flights14.9%
Departs 22:4338 flights10.9%
Departs 22:5137 flights10.6%

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 23:59 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and UA 2210 runs 21 points better at 90.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

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Against the route

UA 2210 next to LAX to BOS

Every carrier on LAX to BOS combined arrived on time 76.2% of the time across 4,797 flights, so UA 2210 is 15 points ahead of it. United flew 731 flights on the same city pair under all its flight numbers, including this one, and those ran 85.3% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 12 points.

UA 2210 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2210thin sample	348	90.7%	45 min	1.15%	A
All United Airlines on LAX–BOS	731	85.3%	71 min	0.96%	A+
All carriers on LAX–BOS	4,797	76.2%	80 min	1.81%	B
United Airlines, whole network	830,825	78.8%	73 min	1.02%	B

Across the year

UA 2210 quarter by quarter

UA 2210 did not run the same all year. Its best quarter was Apr–Jun 2026 at 97.7% on time and its weakest Jan–Mar 2026 at 82.2%, a swing of 16 points on roughly 70 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 202530 flights96.7%
Oct–Dec 202592 flights90.2%
Jan–Mar 202677 flights82.2%
Apr–Jun 202687 flights97.7%
Jul–Sep 202662 flights88.7%

Scale runs 75% to 100%.

By weekday, UA 2210 did best on Tuesday at 97.4% on time and worst on Wednesday at 83.7%. Each day rests on about 50 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late UA 2210 runs when it is late

UA 2210 often beats the schedule: 174 of 344 completed flights, 51%, arrived 15 minutes or more early. The 32 late arrivals split 14 under half an hour, 9 between 30 and 60 minutes, and 9 an hour or more. Not one arrived two hours late.

15+ min early174 flights50.6%
Within 15 min138 flights40.1%
15–29 min late14 flights4.1%
30–59 min late9 flights2.6%
1–2 hours late9 flights2.6%
2+ hours late0 flights0.0%

Scale runs 0% to 100%.

Share of 344 completed flights by arrival against schedule.

A late pushback is often recovered here: of 36 departures that left 15 minutes late or more, 15 still arrived on time. 11 flights left on time and still arrived late.

The worst days

Worst days for UA 2210

The latest arrival of the period was on 13 March 2026, 1 hour 57 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 2210 in the period
Date	Arrived late by	Largest filed cause
13 March 2026	1 hour 57 minutes	Late-arriving aircraft
9 August 2026	1 hour 47 minutes	National Airspace System
19 December 2025	1 hour 46 minutes	Late-arriving aircraft
8 March 2026	1 hour 40 minutes	Late-arriving aircraft
3 January 2026	1 hour 13 minutes	Carrier

Delay causes

Why UA 2210 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 1,437 reported delay minutes.

National Airspace System
36%
Late-arriving aircraft
32%
Carrier
32%

36% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 513 minutes out of 1,437, against a national NAS share of 21%. The split is drawn from 1,437 delay minutes reported on UA 2210.

Cancellations sit at 1.15% against a national 1.89%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.6% 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 2,611 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 348 flights under UA 2210 in the data flew LAX to BOS. 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. 348 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 2210

For a booking, UA 2210 has one of the better records a US domestic flight can show: 90.7% on time and 1.15% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures