Flight number record

UA 1687

United Airlines · Houston to Indianapolis

Route: IAH → IND
Departs: 12:30
Flights: 357
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1687, check with United Airlines.

UA 1687 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 about an hour. That rests on 357 flights, with a median arrival 6 minutes early.

Set against the rest of the country, UA 1687's record is 7 points better than the US average of 77.6%. That gap is worth roughly 71 fewer late arrivals for every thousand flights.

On time

84.7%

Arrivals under 15 minutes late, of 354 completed flights

Avg delay

63 min

Across delayed arrivals only, not all flights

Cancelled

0.28%

National rate is 1.81%

1 hour+ late

5.1%

National rate is 8.1%

These figures cover 357 flights between July 2025 and June 2026. The median arrival is 6 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 1687 flies

UA 1687 flies IAH to IND without a single fixed slot. Its most common scheduled departure was 12:30, used on 85 of 357 flights, with 12:15 (49 flights) and 11:55 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 12:3085 flights23.8%
Departs 12:1549 flights13.7%
Departs 11:5538 flights10.6%

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 1687 runs 6 points better at 84.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 1687 next to IAH to IND

Every carrier on IAH to IND combined arrived on time 78.7% of the time across 640 flights, so UA 1687 is 6 points ahead of it. Across its whole network United Airlines managed 79.0%, which this flight beats by 6 points.

UA 1687 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1687thin sample	357	84.7%	63 min	0.28%	B+
All United Airlines on IAH–IND	640	78.7%	59 min	0.62%	B+
All carriers on IAH–IND	640	78.7%	59 min	0.62%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1687 quarter by quarter

UA 1687 did not run the same all year. Its best quarter was Oct–Dec 2025 at 89.1% on time and its weakest Jul–Sep 2025 at 79.1%, a swing of 10 points on roughly 89 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 flights79.1%
Oct–Dec 202592 flights89.1%
Jan–Mar 202682 flights86.4%
Apr–Jun 202691 flights84.4%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1687 did best on Thursday at 94.2% on time and worst on Monday at 72.5%. Each day rests on about 51 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 1687 runs late

One category carries most of the weight here. Carrier accounts for 43% of the 3,398 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
43%
Late-arriving aircraft
27%
Extreme weather
15%
National Airspace System
15%

Extreme weather accounts for 15% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.5 times the usual weather exposure. The split is drawn from 3,398 delay minutes reported on UA 1687.

Cancellations are rare at 0.28%, 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

5.1% 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 about an hour, which a normal layover absorbs.

The 844 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 five other city pairs in the data, including SFO to IAH (175), IND to SFO (45) and SAT to IAH (35), but none flew often enough under UA 1687 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to IND only.

One caution: this is a thin sample. 357 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 1687

For a booking, read UA 1687 as 84.7% on time with 0.28% cancelled over 357 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures