Carrier route record

B6PHX→BOS

JetBlue Airways · Phoenix to Boston

Flights: 280
Period: July 2025 to June 2026
Share of route: 14%
Carriers: 3

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

JetBlue on PHX to BOS sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 280 flights. The strongest carrier on the route with a full sample, American Airlines, flew 1,314 at 78.5% on time.

The national on-time rate over the same period is 77.6%, so JetBlue on PHX to BOS runs 6 points behind the country as a whole. Across a thousand flights that is about 62 extra late arrivals.

On time

71.4%

Arrivals under 15 minutes late, of 273 completed flights

Avg delay

79 min

Across delayed arrivals only, not all flights

Cancelled

2.14%

National rate is 1.81%

Whole route

77.3%

Every carrier on PHX to BOS, 2,022 flights

These figures cover 280 flights between July 2025 and June 2026. Beyond the headline rate, 11.0% 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 PHX to BOS

JetBlue flew 280 of the 2,022 flights on PHX to BOS, about 14% of it. Its 71.4% on time is 6 points worse than the route as a whole, which runs 77.3%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from American at 78.5% to JetBlue at 71.4%.

The two carriers here are closely matched: about a point separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

On-time performance by carrier on PHX to BOS
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlines	1,314	78.5%	70 min	1.60%	B
Delta Air Lines	428	77.3%	106 min	2.34%	B
JetBlue Airways (this page)thin sample	280	71.4%	79 min	2.14%	C

No carrier stands out. American tops the table at 78.5%, about a point clear of the bottom, which is inside the range this kind of sample moves year to year.

Departure window

When JetBlue runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 280 flights.

5am–8am—
8am–11am—
11am–2pm37 flights69.4%
2pm–5pm—
5pm–8pm—
8pm–5am243 flights71.7%

Scale runs 60% to 75%. Rows with fewer than 30 flights show a dash.

The overnight block holds up unusually well at 71.7% on time across 243 flights. Red-eyes fly into empty airspace and empty gates, and they are the first rotation of the aircraft's day rather than the last. The 8pm–5am window is the busiest, with 243 flights scheduled in it.

Across the year

JetBlue on PHX to BOS through the year

Jul–Sep 20257 flights—
Oct–Dec 202590 flights70.8%
Jan–Mar 202690 flights64.7%
Apr–Jun 202693 flights80.4%

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 71.4% on time across 280 flights.

JetBlue on PHX to BOS did not run the same all year. Its best quarter was Apr–Jun 2026 at 80.4% on time and its weakest Jan–Mar 2026 at 64.7%, a swing of 16 points on roughly 93 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.

Across the week, Tuesday is the strongest day at 80.5% on time and Friday the weakest at 61.5%. 19 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 52% of the 6,196 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
52%
Carrier
39%
National Airspace System
9%
Extreme weather
1%

52% 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 6,196 reported delay minutes here, that single category outweighs weather by 52 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 6,196 reported delay minutes.

The largest share of delay minutes, 39%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,419 of the 6,196 delay minutes reported here.

Cancellations sit at 2.14% against a national 1.81%, which is ordinary. Diversions add another 0.36%.

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. 11.0% 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 2,300 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 73.0% on time across 280 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. 280 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 PHX to BOS

Put together: treat all of this as provisional. 280 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 71.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 273 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