Carrier route record

B6BOS→LAS

JetBlue Airways · Boston to Las Vegas

Flights: 1,045
Period: July 2025 to June 2026
Share of route: 64%
Carriers: 2

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with JetBlue Airways.

JetBlue on BOS to LAS 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 77.6%. The late ones land a little over an hour behind schedule. That rests on 1,045 flights, with a median arrival 8 minutes early.

The US average over the same twelve months is 77.6%, so there is little to separate JetBlue on BOS to LAS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

74.3%

Arrivals under 15 minutes late, of 1,028 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

1.15%

National rate is 1.81%

Whole route

75.6%

Every carrier on BOS to LAS, 1,638 flights

These figures cover 1,045 flights between July 2025 and June 2026. Beyond the headline rate, 9.9% 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 BOS to LAS

JetBlue flew 1,045 of the 1,638 flights on BOS to LAS, most of the route. Its 74.3% on time is about level with the route as a whole at 75.6%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Delta at 77.9% to JetBlue at 74.3%.

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.

On-time performance by carrier on BOS to LAS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines	593	77.9%	58 min	1.35%	B
JetBlue Airways (this page)	1,045	74.3%	69 min	1.15%	C

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 19 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–8am234 flights79.0%
8am–11am310 flights83.3%
11am–2pm27 flights—
2pm–5pm72 flights67.6%
5pm–8pm260 flights65.1%
8pm–5am142 flights64.3%

Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.

The 8pm–5am window is where this operation falls apart: 64.3% on time, against 83.3% 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 310 flights scheduled in it.

Across the year

JetBlue on BOS to LAS through the year

Darker means more delays. Figures are on-time percentages.September best, March worst

September is the best month on the calendar at 84.6% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. October was the busiest month here, with 118 flights.

Across the week, Tuesday is the strongest day at 78.5% on time and Sunday the weakest at 64.9%. 14 points is a smaller lever than departure hour, but it is free.

Delay causes

Why JetBlue runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 44% of the 18,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
44%
National Airspace System
27%
Carrier
26%
Extreme weather
4%

44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 18,000 reported delay minutes here, that single category outweighs weather by 12 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 18,328 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 83.3% on time here.

Cancellations sit at 1.15% against a national 1.81%, which is ordinary. Diversions add another 0.48%.

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. 9.9% 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 2,381 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 76.3% on time across 1,046 flights, within 2 points 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. 1,045 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 BOS to LAS

Put together: treat all of this as provisional. 1,045 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 74.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 1,028 completed flights over 12 months sit behind that.

Where to go next

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.

Key figures