Carrier route record

B6PHX→BOS

JetBlue Airways · Phoenix to Boston

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 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, 5 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, Delta Air Lines, flew 429 at 76.6% on time.

The national on-time rate over the same period is 77.3%, so JetBlue on PHX to BOS runs 5 points behind the country as a whole. Across a thousand flights that is about 51 extra late arrivals.

On time

72.2%

Arrivals under 15 minutes late, of 266 completed flights

Avg delay

80 min

Across delayed arrivals only, not all flights

Cancelled

2.20%

National rate is 1.89%

Whole route

75.7%

Every carrier on PHX to BOS, 2,010 flights

These figures cover 273 flights between September 2025 and August 2026. Beyond the headline rate, 10.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Carrier by carrier

JetBlue against every carrier on PHX to BOS

JetBlue flew 273 of the 2,010 flights on PHX to BOS, about 14% of it. Its 72.2% on time is 4 points worse than the route as a whole, which runs 75.7%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from Delta at 76.6% to JetBlue at 72.2%.

The two carriers here are closely matched: half 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
Delta Air Lines	429	76.6%	84 min	2.33%	B
American Airlines	1,308	76.1%	69 min	1.61%	B
JetBlue Airways (this page)thin sample	273	72.2%	80 min	2.20%	C

No carrier stands out. Delta tops the table at 76.6%, half a point clear of the bottom, which is inside the range this kind of sample moves year to year.

Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

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 273 flights.

5am–8am—
8am–11am—
11am–2pm37 flights69.4%
2pm–5pm—
5pm–8pm—
8pm–5am236 flights72.6%

Scale runs 60% to 80%. Rows with fewer than 30 flights show a dash.

The overnight block holds up unusually well at 72.6% on time across 236 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 236 flights scheduled in it.

Across the year

JetBlue on PHX to BOS through the year

Oct–Dec 202590 flights70.8%
Jan–Mar 202690 flights64.7%
Apr–Jun 202693 flights80.4%

Scale runs 55% to 85%.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 72.2% on time across 273 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 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, Tuesday is the strongest day at 82.5% on time and Friday the weakest at 60.5%, a spread of 22 points.

Arrival by arrival

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

JetBlue on PHX to BOS often beats the schedule: 75 of 266 completed flights, 28%, arrived 15 minutes or more early. The 74 late arrivals split 26 under half an hour, 20 between 30 and 60 minutes, and 28 an hour or more.

15+ min early75 flights28.2%
Within 15 min117 flights44.0%
15–29 min late26 flights9.8%
30–59 min late20 flights7.5%
1–2 hours late17 flights6.4%
2+ hours late11 flights4.1%

Scale runs 0% to 100%.

Share of 266 completed flights by arrival against schedule.

21 of 76 late departures made up the time and arrived on time, 28% of them. In the other direction, 19 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 BOS.

The worst days

Worst days for JetBlue on PHX to BOS

The latest arrival of the period was on 28 November 2025, 22 hours 54 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On four of the five worst days the largest share was filed as a late-arriving aircraft.

The latest arrivals of JetBlue on PHX to BOS in the period
Date	Arrived late by	Largest filed cause
28 November 2025	22 hours 54 minutes	Carrier
6 March 2026	4 hours 59 minutes	Late-arriving aircraft
28 October 2025	3 hours 49 minutes	Late-arriving aircraft
21 February 2026	3 hours 6 minutes	Late-arriving aircraft
15 March 2026	2 hours 30 minutes	Late-arriving aircraft

Delay causes

Why JetBlue runs late on this route

Late-arriving aircraft accounts for 49% of the 5,883 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
49%
Carrier
41%
National Airspace System
9%
Extreme weather
1%

49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,883 reported delay minutes here, that single category outweighs weather by 49 to one. The split is drawn from 5,883 reported delay minutes.

The largest share of delay minutes, 41%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,391 of the 5,883 delay minutes reported here.

Cancellations sit at 2.20% against a national 1.89%, which is ordinary. Diversions add another 0.37%.

Connections and stage length

What a delay here costs

10.5% 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 73.5% 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 PHX to BOS

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 72.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 266 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