Flight number record
UA 662
United Airlines · Boston to Denver
- Route
- BOS → DEN
- Departs
- 09:30
- Flights
- 278
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 662, check with United Airlines.
UA 662 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 14 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 278 flights, with a median arrival 16 minutes early.
Set against the rest of the country, UA 662's record is 14 points better than the US average of 77.6%. That gap is worth roughly 144 fewer late arrivals for every thousand flights.
Key figures
On time
92.0%
Arrivals under 15 minutes late, of 275 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
0.72%
National rate is 1.81%
1 hour+ late
3.3%
National rate is 8.1%
These figures cover 278 flights between July 2025 and June 2026. The median arrival is 16 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 662 flies
UA 662 flies BOS to DEN without a single fixed slot. Its most common scheduled departure was 09:30, used on 128 of 278 flights, with 09:15 (54 flights) and 09:20 (52 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 09:30128 flights46.0%
- Departs 09:1554 flights19.4%
- Departs 09:2052 flights18.7%
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 09:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and UA 662 runs 8 points better at 92.0%. 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 662 next to BOS to DEN
Every carrier on BOS to DEN combined arrived on time 76.5% of the time across 3,899 flights, so UA 662 is 16 points ahead of it. United flew 1,908 flights on the same city pair under all its flight numbers, including this one, and those ran 83.0% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 662thin sample | 278 | 92.0% | 75 min | 0.72% | A+ |
| All United Airlines on BOS–DEN | 1,908 | 83.0% | 64 min | 1.00% | B |
| All carriers on BOS–DEN | 3,899 | 76.5% | 58 min | 1.18% | B |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 662 quarter by quarter
Quarter by quarter UA 662 held fairly steady: 89.1% in Jul–Sep 2025, 90.2% in Oct–Dec 2025, 94.6% in Jan–Mar 2026 and 95.3% 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 202592 flights89.1%
- Oct–Dec 202561 flights90.2%
- Jan–Mar 202639 flights94.6%
- Apr–Jun 202686 flights95.3%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 662 ranged from 88.9% on Friday to 97.7% on Monday. With about 40 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why UA 662 runs late
One category carries most of the weight here. Carrier accounts for 72% of the 1,653 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.
- 72%Carrier
- 22%National Airspace System
- 6%Late-arriving aircraft
The largest share of delay minutes, 72%, 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 1,190 of the 1,653 delay minutes reported here. The split is drawn from 1,653 delay minutes reported on UA 662.
Cancellations are rare at 0.72%, 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 3.3% 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 1,754 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 fourteen other city pairs in the data, including DEN to SMF (41), SFO to RNO (16) and RNO to DEN (16), but none flew often enough under UA 662 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to DEN only.
One caution: this is a thin sample. 278 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 662
For a booking, UA 662 has one of the better records a US domestic flight can show: 92.0% on time and 0.72% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- BOS to DEN, every carrier and departure
- DEN to BOS, the return direction
- Delta Air Lines 499 on the same route84.7%
- United Airlines 647 on the same route91.1%
- United Airlines 2297 on the same route84.3%
- United Airlines 414 on the same route90.0%
- JetBlue Airways 393 on the same route79.6%
- JetBlue Airways 993 on the same route59.3%
- Boston Logan International (BOS) delay statistics
- Denver International (DEN) 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
- Worst months to fly in the US, ranked by the data
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.