Flight number record
DL 2099
Delta Air Lines · New York to Houston
- Route
- LGA → IAH
- Departs
- 10:10
- Flights
- 332
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2099, check with Delta Air Lines.
DL 2099 sits in the middle of the pack with a C−. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 332 flights, with a median arrival 7 minutes early.
Key figures
On time
74.4%
Arrivals under 15 minutes late, of 313 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
4.52%
National rate is 1.89%
1 hour+ late
9.9%
National rate is 8.3%
These figures cover 332 flights between September 2025 and August 2026. Beyond the headline rate, 9.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2099 flies
DL 2099 flies LGA to IAH without a single fixed slot. Its most common scheduled departure was 10:10, used on 59 of 332 flights, with 10:50 (44 flights) and 10:15 (37 flights) next.
- Departs 10:1059 flights17.8%
- Departs 10:5044 flights13.3%
- Departs 10:1537 flights11.1%
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 10:10 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 2099 runs 10 points worse at 74.4%. 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
DL 2099 next to LGA to IAH
Every carrier on LGA to IAH combined arrived on time 76.2% of the time across 3,997 flights, so DL 2099 is 2 points behind it. Delta flew 1,347 flights on the same city pair under all its flight numbers, including this one, and those ran 74.0% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2099thin sample | 332 | 74.4% | 66 min | 4.52% | C− |
| All Delta Air Lines on LGA–IAH | 1,347 | 74.0% | 87 min | 4.53% | C− |
| All carriers on LGA–IAH | 3,997 | 76.2% | 86 min | 2.88% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2099 quarter by quarter
DL 2099 did not run the same all year. Its best quarter was Jan–Mar 2026 at 83.1% on time and its weakest Oct–Dec 2025 at 63.4%, a swing of 20 points on roughly 66 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 flights73.3%
- Oct–Dec 202589 flights63.4%
- Jan–Mar 202672 flights83.1%
- Apr–Jun 202688 flights75.6%
- Jul–Sep 202653 flights80.0%
Scale runs 55% to 90%.
By weekday, DL 2099 did best on Saturday at 83.3% on time and worst on Monday at 68.9%. Each day rests on about 47 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2099 runs when it is late
DL 2099 often beats the schedule: 129 of 313 completed flights, 41%, arrived 15 minutes or more early. The 80 late arrivals split 22 under half an hour, 27 between 30 and 60 minutes, and 31 an hour or more.
- 15+ min early129 flights41.2%
- Within 15 min104 flights33.2%
- 15–29 min late22 flights7.0%
- 30–59 min late27 flights8.6%
- 1–2 hours late22 flights7.0%
- 2+ hours late9 flights2.9%
Scale runs 0% to 100%.
Share of 313 completed flights by arrival against schedule.
12 of 61 late departures made up the time and arrived on time, 20% of them. In the other direction, 31 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 IAH.
The worst days
Worst days for DL 2099
The latest arrival of the period was on 14 December 2025, 5 hours 26 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 |
|---|---|---|
| 14 December 2025 | 5 hours 26 minutes | Carrier |
| 27 May 2026 | 4 hours 20 minutes | Carrier |
| 30 November 2025 | 3 hours 47 minutes | Late-arriving aircraft |
| 6 October 2025 | 3 hours 39 minutes | Carrier |
| 25 September 2025 | 3 hours 22 minutes | Late-arriving aircraft |
Delay causes
Why DL 2099 runs late
Carrier accounts for 55% of the 5,288 delay minutes carriers reported here, and the remaining four split what is left.
- 55%Carrier
- 23%Late-arriving aircraft
- 22%National Airspace System
The largest share of delay minutes, 55%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,922 of the 5,288 delay minutes reported here. The split is drawn from 5,288 delay minutes reported on DL 2099.
Cancellations run at 4.52%, against 1.89% nationally. That is roughly one flight in twenty 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
9.9% 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 1,416 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 one other city pair in the data, including IAH to LGA (74), but none flew often enough under DL 2099 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LGA to IAH only.
One caution: this is a thin sample. 332 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 DL 2099
For a booking, the cancellation rate is the figure to plan around on DL 2099: 4.52% of its 332 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- LGA to IAH, every carrier and departure
- IAH to LGA, the return direction
- Delta Air Lines 2930 on the same route71.7%
- Delta Air Lines 2109 on the same route61.3%
- United Airlines 2617 on the same route85.4%
- United Airlines 2371 on the same route91.5%
- LaGuardia (LGA) delay statistics
- George Bush Intercontinental (IAH) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- What a cancellation rate actually tells you (and what it hides)
A flight number here means Delta Air Lines’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.