Flight number record
UA 1693
United Airlines · Chicago to Boston
- Route
- ORD → BOS
- Departs
- 13:55
- Flights
- 319
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1693, check with United Airlines.
UA 1693 draws a D. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 319 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so UA 1693 runs 15 points behind the country as a whole. Across a thousand flights that is about 150 extra late arrivals.
Key figures
On time
62.3%
Arrivals under 15 minutes late, of 310 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
2.51%
National rate is 1.89%
1 hour+ late
19.0%
National rate is 8.3%
These figures cover 319 flights between September 2025 and August 2026. Beyond the headline rate, 19.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 1693 flies
UA 1693 flies ORD to BOS without a single fixed slot. Its most common scheduled departure was 13:55, used on 254 of 319 flights.
- Departs 13:55254 flights79.6%
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 13:55 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 1693 runs 16 points worse at 62.3%. 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 1693 next to ORD to BOS
Every carrier on ORD to BOS combined arrived on time 66.6% of the time across 7,864 flights, so UA 1693 is 4 points behind it. United flew 2,794 flights on the same city pair under all its flight numbers, including this one, and those ran 68.0% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 17 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1693thin sample | 319 | 62.3% | 81 min | 2.51% | D |
| All United Airlines on ORD–BOS | 2,794 | 68.0% | 80 min | 1.79% | C |
| All carriers on ORD–BOS | 7,864 | 66.6% | 81 min | 2.99% | C |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1693 quarter by quarter
UA 1693 did not run the same all year. Its best quarter was Jan–Mar 2026 at 73.3% on time and its weakest Jul–Sep 2026 at 52.5%, a swing of 21 points on roughly 80 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 20256 flights—
- Oct–Dec 202591 flights57.3%
- Jan–Mar 202690 flights73.3%
- Apr–Jun 202691 flights62.9%
- Jul–Sep 202641 flights52.5%
Scale runs 45% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1693 did best on Saturday at 77.8% on time and worst on Thursday at 56.8%. Each day rests on about 46 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1693 runs when it is late
When UA 1693 is late it tends to be very late: 59 of its 117 late arrivals were an hour or more behind, and 21 were two hours or more.
- 15+ min early59 flights19.0%
- Within 15 min134 flights43.2%
- 15–29 min late27 flights8.7%
- 30–59 min late31 flights10.0%
- 1–2 hours late38 flights12.3%
- 2+ hours late21 flights6.8%
Scale runs 0% to 100%.
Share of 310 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 107 departures that left 15 minutes late or more, only 7 made it up before arrival. In the other direction, 17 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 BOS.
The worst days
Worst days for UA 1693
The latest arrival of the period was on 25 September 2025, 6 hours 59 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 25 September 2025 | 6 hours 59 minutes | Late-arriving aircraft |
| 28 December 2025 | 6 hours 4 minutes | Late-arriving aircraft |
| 7 July 2026 | 4 hours 58 minutes | National Airspace System |
| 13 October 2025 | 4 hours 56 minutes | Late-arriving aircraft |
| 14 October 2025 | 4 hours 35 minutes | National Airspace System |
Delay causes
Why UA 1693 runs late
National Airspace System accounts for 60% of the 9,432 delay minutes carriers reported here, and the remaining four split what is left.
- 60%National Airspace System
- 25%Late-arriving aircraft
- 10%Carrier
- 5%Extreme weather
60% 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 5,697 minutes out of 9,432, against a national NAS share of 21%. The split is drawn from 9,432 delay minutes reported on UA 1693.
Cancellations run at 2.51%, against 1.89% nationally. That is about one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
19.0% 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 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 seven other city pairs in the data, including BZN to ORD (183), BOS to EWR (127) and ATL to ORD (46), but none flew often enough under UA 1693 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to BOS only.
One caution: this is a thin sample. 319 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 1693
For a booking, the cancellation rate is the figure to plan around on UA 1693: 2.51% of its 319 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ORD to BOS, every carrier and departure
- BOS to ORD, the return direction
- JetBlue Airways 312 on the same route69.5%
- Chicago O'Hare International (ORD) delay statistics
- Boston Logan International (BOS) 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
- How often a connection fails at the major US hubs
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.