Flight number record
UA 2098
United Airlines · Boston to Washington
- Route
- BOS → IAD
- Departs
- 09:30
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2098, check with United Airlines.
UA 2098 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 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 55 minutes. That rests on 365 flights, with a median arrival 10 minutes early.
Set against the rest of the country, UA 2098's record is 12 points better than the US average of 77.3%. That gap is worth roughly 124 fewer late arrivals for every thousand flights.
Key figures
On time
89.7%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
1.92%
National rate is 1.89%
1 hour+ late
2.2%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 10 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 2098 flies
UA 2098 is scheduled to leave Boston (BOS) at 09:30 local time and reach Washington (IAD) at 11:13. That slot held for 317 of the 365 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.
- Departs 09:30317 flights86.8%
- Departs 09:2547 flights12.9%
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 09:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 2098 runs 6 points better at 89.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
UA 2098 next to BOS to IAD
Every carrier on BOS to IAD combined arrived on time 83.2% of the time across 1,527 flights, so UA 2098 is 7 points ahead of it. United flew 1,450 flights on the same city pair under all its flight numbers, including this one, and those ran 83.3% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2098 | 365 | 89.7% | 53 min | 1.92% | A |
| All United Airlines on BOS–IAD | 1,450 | 83.3% | 78 min | 2.28% | B |
| All carriers on BOS–IAD | 1,527 | 83.2% | 85 min | 3.01% | B− |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2098 quarter by quarter
UA 2098 did not run the same all year. Its best quarter was Oct–Dec 2025 at 93.5% on time and its weakest Jul–Sep 2026 at 82.3%, a swing of 11 points on roughly 73 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 flights93.3%
- Oct–Dec 202592 flights93.5%
- Jan–Mar 202690 flights90.5%
- Apr–Jun 202691 flights88.9%
- Jul–Sep 202662 flights82.3%
Scale runs 75% to 100%.
By weekday, UA 2098 did best on Wednesday at 98.0% on time and worst on Thursday at 78.4%. Each day rests on about 52 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2098 runs when it is late
UA 2098 often beats the schedule: 106 of 358 completed flights, 30%, arrived 15 minutes or more early. The 37 late arrivals split 17 under half an hour, 12 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early106 flights29.6%
- Within 15 min215 flights60.1%
- 15–29 min late17 flights4.7%
- 30–59 min late12 flights3.4%
- 1–2 hours late6 flights1.7%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
5 of 25 late departures made up the time and arrived on time, 20% of them. 17 flights left on time and still arrived late.
The worst days
Worst days for UA 2098
The latest arrival of the period was on 28 June 2026, 7 hours 27 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 28 June 2026 | 7 hours 27 minutes | Carrier |
| 30 December 2025 | 2 hours 35 minutes | Carrier |
| 9 April 2026 | 1 hour 40 minutes | Late-arriving aircraft |
| 21 July 2026 | 1 hour 34 minutes | National Airspace System |
| 3 August 2026 | 1 hour 31 minutes | Carrier |
Delay causes
Why UA 2098 runs late
Carrier accounts for 55% of the 1,946 delay minutes carriers reported here, and the remaining four split what is left.
- 55%Carrier
- 31%National Airspace System
- 12%Late-arriving aircraft
- 2%Extreme weather
The largest share of delay minutes, 55%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,078 of the 1,946 delay minutes reported here. The split is drawn from 1,946 delay minutes reported on UA 2098.
Cancellations sit at 1.92% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.2% 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 same number turns up on one other city pair in the data, including EWR to BOS (20), but none flew often enough under UA 2098 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to IAD only.
One caution: this is a thin sample. 365 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 2098
For a booking, read UA 2098 as 89.7% on time with 1.92% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- BOS to IAD, every carrier and departure
- IAD to BOS, the return direction
- United Airlines 721 on the same route76.6%
- United Airlines 1734 on the same route96.1%
- United Airlines 2136 on the same route70.0%
- Boston Logan International (BOS) delay statistics
- Washington Dulles International (IAD) 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.