Carrier route record

B6BOS→PHX

JetBlue Airways · Boston to Phoenix

Flights: 273
Period: September 2025 to August 2026
Share of route: 14%
Carriers: 3

Historical statistics for September 2025 to August 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, 4 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 273 flights. The strongest carrier on the route with a full sample, American Airlines, flew 1,310 at 80.0% on time.

The US average over the same twelve months is 77.3%, so there is little to separate JetBlue on BOS to PHX from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

73.5%

Arrivals under 15 minutes late, of 268 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

1.83%

National rate is 1.89%

Whole route

77.3%

Every carrier on BOS to PHX, 2,012 flights

These figures cover 273 flights between September 2025 and August 2026. Beyond the headline rate, 11.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Carrier by carrier

JetBlue against every carrier on BOS to PHX

JetBlue flew 273 of the 2,012 flights on BOS to PHX, about 14% of it. Its 73.5% on time is 4 points worse than the route as a whole, which runs 77.3%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from American at 80.0% to Delta at 71.5%.

The choice of carrier is not cosmetic here. American Airlines arrives on time 80.0% of the time; Delta Air Lines manages 71.5%. Sample sizes sit next to every figure, because a two-point gap across 429 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	1,310	80.0%	80 min	1.60%	B
JetBlue Airways (this page)thin sample	273	73.5%	69 min	1.83%	C
Delta Air Lines	429	71.5%	53 min	1.86%	C

American leads Delta by 9 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

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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 9 points between the best and worst carrier.

5am–8am—
8am–11am37 flights83.8%
11am–2pm—
2pm–5pm38 flights83.3%
5pm–8pm184 flights68.0%
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 68.0% 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 184 flights scheduled in it.

Across the year

JetBlue on BOS to PHX through the year

Oct–Dec 202590 flights68.5%
Jan–Mar 202690 flights72.1%
Apr–Jun 202693 flights79.6%

Scale runs 60% to 85%.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 73.5% on time across 273 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 91 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 89.2% on time and Friday the weakest at 59.0%, a spread of 30 points.

Arrival by arrival

How late JetBlue on BOS to PHX runs when it is late

The 71 late arrivals split 20 under half an hour, 21 between 30 and 60 minutes, and 30 an hour or more.

15+ min early59 flights22.0%
Within 15 min138 flights51.5%
15–29 min late20 flights7.5%
30–59 min late21 flights7.8%
1–2 hours late20 flights7.5%
2+ hours late10 flights3.7%

Scale runs 0% to 100%.

Share of 268 completed flights by arrival against schedule.

14 of 68 late departures made up the time and arrived on time, 21% of them. In the other direction, 17 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 PHX.

The worst days

Worst days for JetBlue on BOS to PHX

The latest arrival of the period was on 6 March 2026, 5 hours 27 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.

The latest arrivals of JetBlue on BOS to PHX in the period
Date	Arrived late by	Largest filed cause
6 March 2026	5 hours 27 minutes	Late-arriving aircraft
20 February 2026	4 hours 18 minutes	Carrier
28 October 2025	3 hours 53 minutes	Late-arriving aircraft
21 February 2026	3 hours 5 minutes	Late-arriving aircraft
1 January 2026	2 hours 45 minutes	Late-arriving aircraft

Delay causes

Why JetBlue runs late on this route

Late-arriving aircraft accounts for 49% of the 4,911 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
49%
National Airspace System
24%
Carrier
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. Across 4,911 reported delay minutes here, that single category outweighs weather by 17 to one. The split is drawn from 4,911 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 1.83% against a national 1.89%, which is ordinary. Diversions add another 0.00%.

Connections and stage length

What a delay here costs

11.2% 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 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 72.2% on time across 273 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. 273 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. 273 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 73.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 268 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures