Flight number record

AA 1874

American Airlines · Philadelphia to Boston

Route: PHL → BOS
Departs: 21:30
Flights: 295
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AA 1874, check with American Airlines.

AA 1874 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 295 flights, with a median arrival 4 minutes early.

The national on-time rate over the same period is 77.6%, so AA 1874 runs 8 points behind the country as a whole. Across a thousand flights that is about 81 extra late arrivals.

On time

69.5%

Arrivals under 15 minutes late, of 282 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

4.41%

National rate is 1.81%

1 hour+ late

13.5%

National rate is 8.1%

These figures cover 295 flights between July 2025 and June 2026. Beyond the headline rate, 13.5% 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.

Schedule

When AA 1874 flies

AA 1874 flies PHL to BOS without a single fixed slot. Its most common scheduled departure was 21:30, used on 74 of 295 flights, with 21:57 (46 flights) and 21:25 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:3074 flights25.1%
Departs 21:5746 flights15.6%
Departs 21:2538 flights12.9%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 21:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and AA 1874 runs level with that at 69.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

AA 1874 next to PHL to BOS

Every carrier on PHL to BOS combined arrived on time 75.2% of the time across 4,956 flights, so AA 1874 is 6 points behind it. American flew 2,246 flights on the same city pair under all its flight numbers, including this one, and those ran 71.4% on time. Across its whole network American Airlines managed 74.4%, which this flight trails by 5 points.

AA 1874 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AA 1874thin sample	295	69.5%	70 min	4.41%	C−
All American Airlines on PHL–BOS	2,246	71.4%	82 min	2.89%	C
All carriers on PHL–BOS	4,956	75.2%	79 min	2.93%	B
American Airlines, whole network	986,297	74.4%	85 min	2.29%	C

Across the year

AA 1874 quarter by quarter

AA 1874 did not run the same all year. Its best quarter was Oct–Dec 2025 at 75.3% on time and its weakest Jul–Sep 2025 at 53.2%, a swing of 22 points on roughly 74 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.

Jul–Sep 202565 flights53.2%
Oct–Dec 202580 flights75.3%
Jan–Mar 202683 flights74.4%
Apr–Jun 202667 flights72.3%

Scale runs 45% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, AA 1874 did best on Wednesday at 82.4% on time and worst on Monday at 57.8%. Each day rests on about 42 flights, so a gap of 25 points is worth noticing but could still narrow in another year.

Delay causes

Why AA 1874 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 51% of the 5,993 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
51%
Carrier
33%
National Airspace System
10%
Extreme weather
6%

51% 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 5,993 reported delay minutes here, that single category outweighs weather by 9 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 5,993 delay minutes reported on AA 1874.

Cancellations run at 4.41%, against 1.81% nationally. That is roughly one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 13.5% 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.

Every one of the 295 flights under AA 1874 in the data flew PHL to BOS. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 295 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 AA 1874

For a booking, the cancellation rate is the figure to plan around on AA 1874: 4.41% of its 295 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.

Where to go next

A flight number here means American Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

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