Carrier route record
AAPHX→BOS
American Airlines · Phoenix to Boston
- Flights
- 1,308
- Period
- September 2025 to August 2026
- Share of route
- 65%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with American Airlines.
American on PHX to BOS lands a B, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 1,308 flights, with a median arrival 5 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate American on PHX to BOS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
76.1%
Arrivals under 15 minutes late, of 1,284 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
1.61%
National rate is 1.89%
Whole route
75.7%
Every carrier on PHX to BOS, 2,010 flights
These figures cover 1,308 flights between September 2025 and August 2026. Beyond the headline rate, 9.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
American against every carrier on PHX to BOS
American flew 1,308 of the 2,010 flights on PHX to BOS, most of the route. Its 76.1% on time is about level with the route as a whole at 75.7%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Delta at 76.6% to JetBlue at 72.2%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 429 | 76.6% | 84 min | 2.33% | B |
| American Airlines (this page) | 1,308 | 76.1% | 69 min | 1.61% | B |
| JetBlue Airwaysthin sample | 273 | 72.2% | 80 min | 2.20% | C |
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 American runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 18 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am365 flights80.3%
- 11am–2pm332 flights69.4%
- 2pm–5pm380 flights71.2%
- 5pm–8pm2 flights—
- 8pm–5am229 flights87.0%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 69.4% on time against 87.0% for 8pm–5am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 2pm–5pm window is the busiest, with 380 flights scheduled in it.
Across the year
American on PHX to BOS through the year
July is the worst month at 60.0% on time, 26 points below April, the best at 86.1%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. July was the busiest month here, with 122 flights.
Across the week, Saturday is the strongest day at 80.8% on time and Friday the weakest at 72.0%, a spread of 9 points.
Arrival by arrival
How late American on PHX to BOS runs when it is late
American on PHX to BOS often beats the schedule: 412 of 1,284 completed flights, 32%, arrived 15 minutes or more early. The 307 late arrivals split 110 under half an hour, 79 between 30 and 60 minutes, and 118 an hour or more.
- 15+ min early412 flights32.1%
- Within 15 min565 flights44.0%
- 15–29 min late110 flights8.6%
- 30–59 min late79 flights6.2%
- 1–2 hours late79 flights6.2%
- 2+ hours late39 flights3.0%
Scale runs 0% to 100%.
Share of 1,284 completed flights by arrival against schedule.
86 of 336 late departures made up the time and arrived on time, 26% of them. 57 flights left on time and still arrived late.
The worst days
Worst days for American on PHX to BOS
The latest arrival of the period was on 26 September 2025, 20 hours 13 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 September 2025 | 20 hours 13 minutes | Late-arriving aircraft |
| 4 June 2026 | 10 hours 59 minutes | Carrier |
| 1 July 2026 | 7 hours 10 minutes | Carrier |
| 11 June 2026 | 6 hours 22 minutes | Late-arriving aircraft |
| 30 August 2026 | 5 hours 40 minutes | Late-arriving aircraft |
Delay causes
Why American runs late on this route
Late-arriving aircraft accounts for 46% of the 21,000 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Late-arriving aircraft
- 30%National Airspace System
- 24%Carrier
- 0%Extreme weather
46% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 21,000 reported delay minutes here, that single category outweighs weather by 46 to one. The split is drawn from 21,215 reported delay minutes.
Cancellations sit at 1.61% against a national 1.89%, which is ordinary. Diversions add another 0.23%.
Connections and stage length
What a delay here costs
9.2% 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 is a different operation and performs like one: it runs 80.0% on time across 1,310 flights, 4 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
The sample behind these figures is 1,308 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking American on PHX to BOS
Put together: the calendar is the biggest lever here, not the carrier or the hour. April runs 86.1% on time and July 60.0%, a swing of 26 points. If the dates move at all, move them out of July before you think about anything else. 1,284 completed flights over 12 months sit behind that.
Related
Where to go next
- PHX to BOS, every carrier
- American on BOS to PHX, the return leg
- Delta Air Lines on PHX to BOS76.6%
- JetBlue Airways on PHX to BOS72.2%
- American Airlines network-wide record
- Phoenix Sky Harbor International (PHX) delay statistics
- Boston Logan International (BOS) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.