Carrier route record

B6BOS→PHX

JetBlue Airways · Boston to Phoenix

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 BOS to PHX sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 5 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 1,316 at 79.9% on time.

The national on-time rate over the same period is 77.6%, so JetBlue on BOS to PHX runs 5 points behind the country as a whole. Across a thousand flights that is about 46 extra late arrivals.

On time

73.0%

Arrivals under 15 minutes late, of 274 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

2.14%

National rate is 1.81%

Whole route

76.7%

Every carrier on BOS to PHX, 2,024 flights

These figures cover 280 flights between July 2025 and June 2026. Beyond the headline rate, 11.3% 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 PHX

JetBlue flew 280 of the 2,024 flights on BOS to PHX, about 14% of it. Its 73.0% on time is 4 points worse than the route as a whole, which runs 76.7%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from American at 79.9% to Delta at 69.1%.

The choice of carrier is not cosmetic here. American Airlines arrives on time 79.9% of the time; Delta Air Lines manages 69.1%. Sample sizes sit next to every figure, because a two-point gap across 428 flights means less than a ten-point one.

On-time performance by carrier on BOS to PHX
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlines	1,316	79.9%	77 min	1.60%	B
JetBlue Airways (this page)thin sample	280	73.0%	69 min	2.14%	C
Delta Air Lines	428	69.1%	57 min	1.87%	C

American leads Delta by 11 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

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 16 points, against 11 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am—
8am–11am37 flights83.8%
11am–2pm—
2pm–5pm38 flights83.3%
5pm–8pm191 flights67.4%
8pm–5am14 flights—

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 83.8% of the time, against 67.4% for the evening window. That is 16 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 191 flights scheduled in it.

Across the year

JetBlue on BOS to PHX through the year

Jul–Sep 20257 flights—
Oct–Dec 202590 flights68.5%
Jan–Mar 202690 flights72.1%
Apr–Jun 202693 flights79.6%

Scale runs 60% 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 73.0% on time across 280 flights.

JetBlue on BOS to PHX did not run the same all year. Its best quarter was Apr–Jun 2026 at 79.6% on time and its weakest Oct–Dec 2025 at 68.5%, a swing of 11 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, Monday is the strongest day at 86.8% on time and Friday the weakest at 60.0%. 27 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 49% of the 5,088 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
49%
Carrier
24%
National Airspace System
24%
Extreme weather
3%

49% 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 5,088 reported delay minutes here, that single category outweighs weather by 17 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 5,088 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 83.8% on time here.

Cancellations sit at 2.14% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

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. 11.3% 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 71.4% 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 BOS to PHX

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 73.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 274 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