Flight number record
UA 277
United Airlines · Houston to Fort Lauderdale
- Route
- IAH → FLL
- Departs
- 16:50
- Flights
- 279
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 277, check with United Airlines.
UA 277 lands a B+, 6 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 about an hour on average. That rests on 279 flights, with a median arrival 9 minutes early.
Set against the rest of the country, UA 277's record is 6 points better than the US average of 77.3%. That gap is worth roughly 57 fewer late arrivals for every thousand flights.
Key figures
On time
83.0%
Arrivals under 15 minutes late, of 276 completed flights
Avg delay
57 min
Across delayed arrivals only, not all flights
Cancelled
0.72%
National rate is 1.89%
1 hour+ late
6.5%
National rate is 8.3%
These figures cover 279 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 277 flies
UA 277 flies IAH to FLL without a single fixed slot. Its most common scheduled departure was 16:50, used on 64 of 279 flights, with 16:35 (51 flights) and 16:20 (50 flights) next.
- Departs 16:5064 flights22.9%
- Departs 16:3551 flights18.3%
- Departs 16:2050 flights17.9%
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 16:50 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 277 runs 11 points better at 83.0%. 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 277 next to IAH to FLL
Every carrier on IAH to FLL combined arrived on time 78.5% of the time across 2,923 flights, so UA 277 is 5 points ahead of it. United flew 1,893 flights on the same city pair under all its flight numbers, including this one, and those ran 85.6% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 277thin sample | 279 | 83.0% | 57 min | 0.72% | B+ |
| All United Airlines on IAH–FLL | 1,893 | 85.6% | 59 min | 0.58% | A+ |
| All carriers on IAH–FLL | 2,923 | 78.5% | 67 min | 1.27% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 277 quarter by quarter
UA 277 did not run the same all year. Its best quarter was Oct–Dec 2025 at 89.4% on time and its weakest Jul–Sep 2026 at 70.0%, a swing of 19 points on roughly 70 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.
- Oct–Dec 202567 flights89.4%
- Jan–Mar 202686 flights85.9%
- Apr–Jun 202686 flights81.2%
- Jul–Sep 202640 flights70.0%
Scale runs 60% to 95%.
By weekday, UA 277 did best on Tuesday at 93.9% on time and worst on Friday at 68.3%. Each day rests on about 40 flights, so a gap of 26 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 277 runs when it is late
UA 277 often beats the schedule: 103 of 276 completed flights, 37%, arrived 15 minutes or more early. The 47 late arrivals split 15 under half an hour, 14 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early103 flights37.3%
- Within 15 min126 flights45.7%
- 15–29 min late15 flights5.4%
- 30–59 min late14 flights5.1%
- 1–2 hours late14 flights5.1%
- 2+ hours late4 flights1.4%
Scale runs 0% to 100%.
Share of 276 completed flights by arrival against schedule.
A late pushback is often recovered here: of 59 departures that left 15 minutes late or more, 20 still arrived on time. 8 flights left on time and still arrived late.
The worst days
Worst days for UA 277
The latest arrival of the period was on 19 June 2026, 4 hours 8 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across June, March, July and October, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 June 2026 | 4 hours 8 minutes | Late-arriving aircraft |
| 16 March 2026 | 3 hours 11 minutes | National Airspace System |
| 26 July 2026 | 2 hours 23 minutes | Carrier |
| 31 October 2025 | 2 hours 4 minutes | Carrier |
| 5 March 2026 | 1 hour 37 minutes | Late-arriving aircraft |
Delay causes
Why UA 277 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,661 reported delay minutes.
- 38%Late-arriving aircraft
- 30%National Airspace System
- 27%Carrier
- 6%Extreme weather
38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,661 reported delay minutes here, that single category outweighs weather by 7 to one. The split is drawn from 2,661 delay minutes reported on UA 277.
Cancellations are rare at 0.72%, 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
6.5% 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 about an hour, which a normal layover absorbs.
The 966 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 six other city pairs in the data, including LAX to IAH (180), SFO to IAH (53) and ORD to AUS (31), but none flew often enough under UA 277 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to FLL only.
One caution: this is a thin sample. 279 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 277
For a booking, read UA 277 as 83.0% on time with 0.72% cancelled over 279 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- IAH to FLL, every carrier and departure
- FLL to IAH, the return direction
- United Airlines 2261 on the same route93.5%
- George Bush Intercontinental (IAH) delay statistics
- Fort Lauderdale-Hollywood International (FLL) 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
- Why the first flight of the morning is statistically safest
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.