Carrier route record
B6JFK→DEN
JetBlue Airways · New York to Denver
- Flights
- 545
- Period
- July 2025 to June 2026
- Share of route
- 35%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on JFK to DEN sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.6%. The late ones land about 55 minutes behind schedule. That rests on 545 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.6%, so JetBlue on JFK to DEN runs 9 points behind the country as a whole. Across a thousand flights that is about 89 extra late arrivals.
Key figures
On time
68.7%
Arrivals under 15 minutes late, of 530 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
2.75%
National rate is 1.81%
Whole route
71.4%
Every carrier on JFK to DEN, 1,572 flights
These figures cover 545 flights between July 2025 and June 2026. Beyond the headline rate, 10.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
JetBlue against every carrier on JFK to DEN
JetBlue flew 545 of the 1,572 flights on JFK to DEN, about 35% of it. Its 68.7% on time is 3 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 73.2% 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 | 978 | 73.2% | 71 min | 2.56% | C |
| JetBlue Airways (this page) | 545 | 68.7% | 55 min | 2.75% | C |
| Frontier Airlinesthin sample | 49 | 67.3% | 124 min | 0.00% | C+ |
Flight by flight
JetBlue flight numbers on JFK to DEN
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 22 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am24 flights—
- 8am–11am248 flights79.8%
- 11am–2pm19 flights—
- 2pm–5pm—
- 5pm–8pm13 flights—
- 8pm–5am241 flights57.7%
Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 57.7% on time, against 79.8% 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 248 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, Tuesday is the strongest day at 84.7% on time and Sunday the weakest at 55.1%. 30 points is a smaller lever than departure hour, but it is free.
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 9,058 reported delay minutes.
- 39%National Airspace System
- 30%Carrier
- 29%Late-arriving aircraft
- 2%Extreme weather
- 0%Security
39% 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 3,501 minutes out of 9,058, against a national NAS share of 21%. The split is drawn from 9,058 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 79.8% on time here.
Cancellations run at 2.75%, against 1.81% nationally. That is roughly 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 stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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 69.7% on time across 545 flights, within about 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: treat all of this as provisional. 545 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 68.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 530 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 DEN73.2%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.