Flight number record
UA 2106
United Airlines · Miami to Chicago
- Route
- MIA → ORD
- Departs
- 16:10
- Flights
- 354
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2106, check with United Airlines.
UA 2106 earns a D+, which is as low as this site's scale goes for a reason. Only 56.3% of flights arrive inside the 15-minute window, 21 points worse than the national rate of 77.3%. Late arrivals average an hour and a half. Treat any tight connection here as a coin flip. That rests on 354 flights, with a median arrival 10 minutes late.
The national on-time rate over the same period is 77.3%, so UA 2106 runs 21 points behind the country as a whole. Across a thousand flights that is about 210 extra late arrivals.
Key figures
On time
56.3%
Arrivals under 15 minutes late, of 348 completed flights
Avg delay
90 min
Across delayed arrivals only, not all flights
Cancelled
0.85%
National rate is 1.89%
1 hour+ late
17.0%
National rate is 8.3%
These figures cover 354 flights between September 2025 and August 2026. Beyond the headline rate, 17.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 2106 flies
UA 2106 flies MIA to ORD without a single fixed slot. Its most common scheduled departure was 16:10, used on 84 of 354 flights, with 16:06 (51 flights) and 16:16 (41 flights) next.
- Departs 16:1084 flights23.7%
- Departs 16:0651 flights14.4%
- Departs 16:1641 flights11.6%
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 16:10 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 2106 runs 16 points worse at 56.3%. 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 2106 next to MIA to ORD
Every carrier on MIA to ORD combined arrived on time 71.1% of the time across 4,464 flights, so UA 2106 is 15 points behind it. United flew 1,087 flights on the same city pair under all its flight numbers, including this one, and those ran 69.7% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 23 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2106thin sample | 354 | 56.3% | 90 min | 0.85% | D+ |
| All United Airlines on MIA–ORD | 1,087 | 69.7% | 85 min | 1.01% | C |
| All carriers on MIA–ORD | 4,464 | 71.1% | 79 min | 1.93% | C |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2106 quarter by quarter
UA 2106 did not run the same all year. Its best quarter was Apr–Jun 2026 at 67.4% on time and its weakest Jul–Sep 2026 at 44.1%, a swing of 23 points on roughly 71 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 flights53.3%
- Oct–Dec 202581 flights55.6%
- Jan–Mar 202690 flights55.1%
- Apr–Jun 202691 flights67.4%
- Jul–Sep 202662 flights44.1%
Scale runs 35% to 75%.
By weekday, UA 2106 did best on Saturday at 65.4% on time and worst on Sunday at 46.0%. Each day rests on about 51 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2106 runs when it is late
The 152 late arrivals split 48 under half an hour, 45 between 30 and 60 minutes, and 59 an hour or more.
- 15+ min early50 flights14.4%
- Within 15 min146 flights42.0%
- 15–29 min late48 flights13.8%
- 30–59 min late45 flights12.9%
- 1–2 hours late25 flights7.2%
- 2+ hours late34 flights9.8%
Scale runs 0% to 100%.
Share of 348 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 96 departures that left 15 minutes late or more, only 7 made it up before arrival. In the other direction, 63 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 2106
The latest arrival of the period was on 16 March 2026, 18 hours 52 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 March 2026 | 18 hours 52 minutes | Extreme weather |
| 21 March 2026 | 13 hours 58 minutes | National Airspace System |
| 1 July 2026 | 6 hours 36 minutes | Late-arriving aircraft |
| 7 December 2025 | 5 hours 49 minutes | Late-arriving aircraft |
| 18 May 2026 | 5 hours 49 minutes | Late-arriving aircraft |
Delay causes
Why UA 2106 runs late
National Airspace System accounts for 49% of the 14,000 delay minutes carriers reported here, and the remaining four split what is left.
- 49%National Airspace System
- 35%Late-arriving aircraft
- 8%Carrier
- 8%Extreme weather
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 14,000 reported delay minutes here, that single category outweighs weather by 5 to one. The split is drawn from 13,725 delay minutes reported on UA 2106.
Cancellations are rare at 0.85%, 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
17.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 1,197 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 SFO (206), ORD to BOS (17) and LAX to PHX (2), but none flew often enough under UA 2106 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MIA to ORD only.
One caution: this is a thin sample. 354 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 2106
For a booking, UA 2106 is a flight to put a long connection behind. 17.0% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- MIA to ORD, every carrier and departure
- ORD to MIA, the return direction
- United Airlines 1983 on the same route80.9%
- Miami International (MIA) 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
- 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.