Carrier route record
B6JFK→DEN
JetBlue Airways · New York to Denver
- Flights
- 545
- Period
- September 2025 to August 2026
- Share of route
- 36%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on JFK to DEN draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 545 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.3%, so JetBlue on JFK to DEN runs 9 points behind the country as a whole. Across a thousand flights that is about 94 extra late arrivals.
Key figures
On time
67.9%
Arrivals under 15 minutes late, of 517 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
5.14%
National rate is 1.89%
Whole route
71.4%
Every carrier on JFK to DEN, 1,531 flights
These figures cover 545 flights between September 2025 and August 2026. Beyond the headline rate, 12.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
JetBlue against every carrier on JFK to DEN
JetBlue flew 545 of the 1,531 flights on JFK to DEN, about 36% of it. Its 67.9% on time is 4 points worse than the route as a whole, which runs 71.4%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Delta at 73.7% to Frontier at 67.3%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 937 | 73.7% | 69 min | 2.56% | C |
| JetBlue Airways (this page) | 545 | 67.9% | 63 min | 5.14% | C− |
| Frontier Airlinesthin sample | 49 | 67.3% | 124 min | 0.00% | C+ |
Flight by flight
JetBlue flight numbers on JFK to DEN
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When JetBlue runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 28 points, against half a point between the best and worst carrier.
- 5am–8am24 flights—
- 8am–11am247 flights81.7%
- 11am–2pm20 flights—
- 2pm–5pm—
- 5pm–8pm13 flights—
- 8pm–5am241 flights54.2%
Scale runs 45% to 85%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 54.2% on time, against 81.7% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 247 flights scheduled in it.
Across the year
JetBlue on JFK to DEN through the year
December is the weak month at 56.9% on time, against 93.8% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. August was the busiest month here, with 62 flights.
Across the week, Wednesday is the strongest day at 81.2% on time and Sunday the weakest at 55.3%, a spread of 26 points.
Arrival by arrival
How late JetBlue on JFK to DEN runs when it is late
JetBlue on JFK to DEN often beats the schedule: 161 of 517 completed flights, 31%, arrived 15 minutes or more early. The 166 late arrivals split 49 under half an hour, 51 between 30 and 60 minutes, and 66 an hour or more.
- 15+ min early161 flights31.1%
- Within 15 min190 flights36.8%
- 15–29 min late49 flights9.5%
- 30–59 min late51 flights9.9%
- 1–2 hours late50 flights9.7%
- 2+ hours late16 flights3.1%
Scale runs 0% to 100%.
Share of 517 completed flights by arrival against schedule.
34 of 161 late departures made up the time and arrived on time, 21% of them. In the other direction, 39 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 DEN.
The worst days
Worst days for JetBlue on JFK to DEN
The latest arrival of the period was on 18 July 2026, 7 hours 10 minutes behind schedule; most of its delay minutes were filed as extreme weather. Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 July 2026 | 7 hours 10 minutes | Extreme weather |
| 6 July 2026 | 3 hours 35 minutes | Carrier |
| 12 March 2026 | 3 hours 25 minutes | Late-arriving aircraft |
| 12 June 2026 | 3 hours 17 minutes | Late-arriving aircraft |
| 19 July 2026 | 3 hours 2 minutes | Carrier |
Delay causes
Why JetBlue runs late on this route
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 10,000 reported delay minutes.
- 35%Carrier
- 31%Late-arriving aircraft
- 29%National Airspace System
- 5%Extreme weather
- 0%Security
The largest share of delay minutes, 35%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,677 of the 10,000 delay minutes reported here. The split is drawn from 10,481 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 81.7% on time here.
Cancellations run at 5.14%, against 1.89% nationally. That is about 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 stage length
What a delay here costs
12.8% 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.
At 1,626 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg runs 67.3% on time across 545 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 545 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 JetBlue on JFK to DEN
Put together: the delay figures matter less here than the 5.14% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 517 completed flights over 12 months sit behind that.
Related
Where to go next
- JFK to DEN, every carrier
- JetBlue on DEN to JFK, the return leg
- Delta Air Lines on JFK to DEN73.7%
- JetBlue Airways network-wide record
- John F. Kennedy International (JFK) delay statistics
- Denver International (DEN) delay statistics
- The US routes with the most cancellations
- What a cancellation rate actually tells you (and what it hides)
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.