Flight number record
UA 1732
United Airlines · Boston to Chicago
- Route
- BOS → ORD
- Departs
- 12:30
- Flights
- 353
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1732, check with United Airlines.
UA 1732 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 353 flights, with a median arrival 9 minutes early.
Set against the rest of the country, UA 1732's record is 7 points better than the US average of 77.6%. That gap is worth roughly 69 fewer late arrivals for every thousand flights.
Key figures
On time
84.5%
Arrivals under 15 minutes late, of 349 completed flights
Avg delay
110 min
Across delayed arrivals only, not all flights
Cancelled
1.13%
National rate is 1.81%
1 hour+ late
5.7%
National rate is 8.1%
These figures cover 353 flights between July 2025 and June 2026. The median arrival is 9 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 1732 flies
UA 1732 flies BOS to ORD without a single fixed slot. Its most common scheduled departure was 12:30, used on 125 of 353 flights, with 12:35 (52 flights) and 12:45 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 12:30125 flights35.4%
- Departs 12:3552 flights14.7%
- Departs 12:4537 flights10.5%
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 12:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and UA 1732 runs 6 points better at 84.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
UA 1732 next to BOS to ORD
Every carrier on BOS to ORD combined arrived on time 72.7% of the time across 7,637 flights, so UA 1732 is 12 points ahead of it. United flew 2,678 flights on the same city pair under all its flight numbers, including this one, and those ran 75.0% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1732thin sample | 353 | 84.5% | 110 min | 1.13% | B |
| All United Airlines on BOS–ORD | 2,678 | 75.0% | 85 min | 1.90% | B |
| All carriers on BOS–ORD | 7,637 | 72.7% | 84 min | 2.91% | C |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 1732 quarter by quarter
UA 1732 did not run the same all year. Its best quarter was Apr–Jun 2026 at 93.0% on time and its weakest Jul–Sep 2025 at 78.3%, a swing of 15 points on roughly 88 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 202592 flights78.3%
- Oct–Dec 202591 flights82.4%
- Jan–Mar 202683 flights85.0%
- Apr–Jun 202687 flights93.0%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1732 did best on Tuesday at 92.3% on time and worst on Sunday at 75.0%. Each day rests on about 50 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 1732 runs late
One category carries most of the weight here. National Airspace System accounts for 73% of the 5,958 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.
- 73%National Airspace System
- 21%Late-arriving aircraft
- 5%Carrier
- 1%Extreme weather
73% 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 4,323 minutes out of 5,958, against a national NAS share of 21%. The split is drawn from 5,958 delay minutes reported on UA 1732.
Cancellations sit at 1.13% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
5.7% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last close to two hours, which a normal layover absorbs.
The 867 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on three other city pairs in the data, including ORD to CVG (171), ORD to DEN (37) and ORD to TYS (26), but none flew often enough under UA 1732 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to ORD only.
One caution: this is a thin sample. 353 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 1732
For a booking, read UA 1732 as 84.5% on time with 1.13% cancelled over 353 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- BOS to ORD, every carrier and departure
- ORD to BOS, the return direction
- United Airlines 2040 on the same route52.3%
- United Airlines 1414 on the same route94.2%
- United Airlines 1015 on the same route48.8%
- JetBlue Airways 311 on the same route84.3%
- Delta Air Lines 2646 on the same route60.3%
- Delta Air Lines 2570 on the same route80.0%
- Boston Logan International (BOS) delay statistics
- Chicago O'Hare International (ORD) 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.