Flight number record
UA 1687
United Airlines · Houston to Indianapolis
- Route
- IAH → IND
- Departs
- 12:30
- Flights
- 357
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1687, check with United Airlines.
UA 1687 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 11 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 357 flights, with a median arrival 7 minutes early.
Set against the rest of the country, UA 1687's record is 11 points better than the US average of 77.3%. That gap is worth roughly 109 fewer late arrivals for every thousand flights.
Key figures
On time
88.2%
Arrivals under 15 minutes late, of 355 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
0.28%
National rate is 1.89%
1 hour+ late
3.9%
National rate is 8.3%
These figures cover 357 flights between September 2025 and August 2026. The median arrival is 7 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 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 11:55 (79 flights) and 12:07 (37 flights) next.
- Departs 12:3085 flights23.8%
- Departs 11:5579 flights22.1%
- Departs 12:0737 flights10.4%
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 1687 runs 10 points better at 88.2%. 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 1687 next to IAH to IND
Every carrier on IAH to IND combined arrived on time 82.0% of the time across 637 flights, so UA 1687 is 6 points ahead of it. Across its whole network United Airlines managed 78.8%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1687thin sample | 357 | 88.2% | 63 min | 0.28% | A+ |
| All United Airlines on IAH–IND | 637 | 82.0% | 55 min | 0.16% | B+ |
| All carriers on IAH–IND | 637 | 82.0% | 55 min | 0.16% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1687 quarter by quarter
Quarter by quarter UA 1687 held fairly steady: 90.0% in Jul–Sep 2025, 89.1% in Oct–Dec 2025, 86.4% in Jan–Mar 2026, 84.4% in Apr–Jun 2026 and 93.5% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202592 flights89.1%
- Jan–Mar 202682 flights86.4%
- Apr–Jun 202691 flights84.4%
- Jul–Sep 202662 flights93.5%
Scale runs 75% to 100%.
By weekday, UA 1687 did best on Sunday at 96.2% on time and worst on Monday at 75.0%. Each day rests on about 51 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1687 runs when it is late
UA 1687 often beats the schedule: 99 of 355 completed flights, 28%, arrived 15 minutes or more early. The 42 late arrivals split 15 under half an hour, 13 between 30 and 60 minutes, and 14 an hour or more.
- 15+ min early99 flights27.9%
- Within 15 min214 flights60.3%
- 15–29 min late15 flights4.2%
- 30–59 min late13 flights3.7%
- 1–2 hours late10 flights2.8%
- 2+ hours late4 flights1.1%
Scale runs 0% to 100%.
Share of 355 completed flights by arrival against schedule.
12 of 44 late departures made up the time and arrived on time, 27% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for UA 1687
The latest arrival of the period was on 16 March 2026, 6 hours 40 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 March 2026 | 6 hours 40 minutes | Carrier |
| 3 September 2025 | 2 hours 34 minutes | Carrier |
| 27 June 2026 | 2 hours 24 minutes | Carrier |
| 9 February 2026 | 2 hours 3 minutes | Carrier |
| 1 May 2026 | 1 hour 58 minutes | Late-arriving aircraft |
Delay causes
Why UA 1687 runs late
Carrier accounts for 46% of the 2,642 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 24%Late-arriving aircraft
- 15%National Airspace System
- 15%Extreme weather
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 2,642 delay minutes reported on UA 1687.
Cancellations are rare at 0.28%, below the national 1.89% 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 3.9% 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.
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.
The same number turns up on five other city pairs in the data, including SFO to IAH (126), 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, UA 1687 has one of the better records a US domestic flight can show: 88.2% on time and 0.28% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- George Bush Intercontinental (IAH) delay statistics
- Indianapolis International (IND) 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.