Flight number record

UA 1732

United Airlines · Boston to Chicago

Route: BOS → ORD
Departs: 12:30
Flights: 332
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1732, check with United Airlines.

UA 1732 lands a B, 7 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 close to two hours on average. That rests on 332 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 77.3%. That gap is worth roughly 65 fewer late arrivals for every thousand flights.

On time

83.8%

Arrivals under 15 minutes late, of 328 completed flights

Avg delay

108 min

Across delayed arrivals only, not all flights

Cancelled

1.20%

National rate is 1.89%

1 hour+ late

5.8%

National rate is 8.3%

These figures cover 332 flights between September 2025 and August 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.

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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 153 of 332 flights, with 12:35 (52 flights) and 12:45 (37 flights) next.

Departs 12:30153 flights46.1%
Departs 12:3552 flights15.7%
Departs 12:4537 flights11.1%

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 12:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 1732 runs 6 points better at 83.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

UA 1732 next to BOS to ORD

Every carrier on BOS to ORD combined arrived on time 71.9% of the time across 7,860 flights, so UA 1732 is 12 points ahead of it. United flew 2,791 flights on the same city pair under all its flight numbers, including this one, and those ran 74.5% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 5 points.

UA 1732 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1732thin sample	332	83.8%	108 min	1.20%	B
All United Airlines on BOS–ORD	2,791	74.5%	86 min	1.79%	C
All carriers on BOS–ORD	7,860	71.9%	87 min	2.98%	C
United Airlines, whole network	830,825	78.8%	73 min	1.02%	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 2026 at 70.7%, a swing of 22 points on roughly 66 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 flights76.7%
Oct–Dec 202591 flights82.4%
Jan–Mar 202683 flights85.0%
Apr–Jun 202687 flights93.0%
Jul–Sep 202641 flights70.7%

Scale runs 60% to 100%.

By weekday, UA 1732 did best on Friday at 93.9% on time and worst on Sunday at 75.5%. Each day rests on about 47 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late UA 1732 runs when it is late

UA 1732 often beats the schedule: 100 of 328 completed flights, 30%, arrived 15 minutes or more early. The 53 late arrivals split 16 under half an hour, 18 between 30 and 60 minutes, and 19 an hour or more.

15+ min early100 flights30.5%
Within 15 min175 flights53.4%
15–29 min late16 flights4.9%
30–59 min late18 flights5.5%
1–2 hours late10 flights3.0%
2+ hours late9 flights2.7%

Scale runs 0% to 100%.

Share of 328 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 34 departures that left 15 minutes late or more, only 4 made it up before arrival. In the other direction, 23 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 ORD.

The worst days

Worst days for UA 1732

The latest arrival of the period was on 15 March 2026, 21 hours 58 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The same cause led on five of the five worst days.

The latest arrivals of UA 1732 in the period
Date	Arrived late by	Largest filed cause
15 March 2026	21 hours 58 minutes	National Airspace System
29 November 2025	9 hours	National Airspace System
27 July 2026	6 hours 35 minutes	National Airspace System
31 March 2026	5 hours 26 minutes	National Airspace System
17 June 2026	5 hours 12 minutes	National Airspace System

Delay causes

Why UA 1732 runs late

National Airspace System accounts for 85% of the 5,713 delay minutes carriers reported here, and the remaining four split what is left.

National Airspace System
85%
Late-arriving aircraft
9%
Carrier
3%
Extreme weather
2%

85% 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 4,878 minutes out of 5,713, against a national NAS share of 21%. The split is drawn from 5,713 delay minutes reported on UA 1732.

Cancellations sit at 1.20% against a national 1.89%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

5.8% of arrivals land an hour or more late, close to the national 8.3%, so 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.

The same number turns up on three other city pairs in the data, including ORD to CVG (192), ORD to TYS (26) and ORD to DEN (24), 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. 332 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 83.8% on time with 1.20% cancelled over 332 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