PlainFlights

Route · BOS → PHL · 2020–2025 BTS data

Boston to Philadelphia

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BOS to PHL (Boston to Philadelphia) ranks #190 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

83.5%
On-time
+4.5 pts
vs US avg
89 min
Delay when late
26,282
Flights
#190 of 4927
Corpus placement

Cancelled

1.8%

Best Month

Feb 2024 89%

Worst Month

Oct 2025 68%

Distance

280 mi

Carriers

25

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 364 85 6 2 B6,YX,F9,AA
Nov 2025 407 62 13 0 F9,AA,B6,YX
Oct 2025 462 148 5 1 AA,B6,YX,F9
Sep 2025 428 97 8 0 YX,F9,AA,B6
Aug 2025 409 80 7 0 AA,YX,F9,B6
Jul 2025 421 126 28 0 AA,B6,YX,F9
Jun 2025 410 119 17 0 AA,B6,YX,F9
May 2025 447 135 4 0 AA,B6,YX,NK
Apr 2025 460 92 1 0 F9,YX,AA,B6
Mar 2025 457 83 3 0 AA,B6,YX,F9
Feb 2025 372 89 13 0 AA,B6,YX,F9
Jan 2025 389 56 6 1 AA,B6,YX,F9
Dec 2024 394 102 6 0 AA,B6,F9,YX
Nov 2024 463 60 0 0 YX,B6,F9,AA
Oct 2024 508 70 0 0 YX,F9,B6,AA
Sep 2024 464 90 0 0 YX,AA,B6,F9
Aug 2024 505 127 29 0 AA,B6,F9,YX
Jul 2024 495 113 12 0 AA,B6,F9,YX
Jun 2024 461 116 15 2 AA,B6,F9,YX
May 2024 487 96 1 0 AA,B6,F9,YX
Apr 2024 424 64 3 0 AA,B6,F9,YX
Mar 2024 387 51 3 1 AA,B6,F9,YX
Feb 2024 337 36 2 0 AA,B6,F9,YX
Jan 2024 337 77 7 1 AA,B6,F9,YX

BOS–PHL seasonal on-time pattern

Best: November (88.5%) · weakest: June (78.3%)

75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 83%

Strongest calendar month

November

88.5% on-time · ~365 flights/mo

Busiest calendar month

March

~422 flights/mo avg

Weakest calendar month

June

78.3% on-time · ~348 flights/mo

Cancellation Rate

1.8%

189 of 10,288 flights

Diversion Rate

0.1%

8 of 10,288 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

BOS - Boston

Full on-time, delay-cause, and seasonal performance for Boston, MA.

BOS on-time profile

PHL - Philadelphia

Full on-time, delay-cause, and seasonal performance for Philadelphia, PA.

PHL on-time profile

Compare the two airports

See BOS and PHL side by side on delays, cancellations, and reliability.

Compare BOS vs PHL

Origin-hub reliability standing

Mid-pack among BOS departures

From BOS, this corridor sits with 49 other 75–85% on-time routes out of 60 tracked departures, not the hub's reliability leaders (6 at ≥85%) and not the softest ( 5 below 75%). Destination: Philadelphia · fleet on-time rank #1746 of 4927.

What the Data Says About BOS to PHL

Bureau of Transportation Statistics records show Boston to Philadelphia (BOS to PHL) running a 83.5% on-time rate over 26,282 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 88.6 minutes. The 280-mile corridor is served by 25 carriers, and over the last 24 months 1.8% of 10,288 flights were cancelled, 0.1% diverted.

The monthly split is wide on this route: Feb 2024 posted the strongest performance at 89% on-time, while Oct 2025 came in at just 68% - a 21-point swing worth factoring into travel timing.

On the multi-year calendar, BOS–PHL peaks in November at 88.5% on-time while March carries the heaviest traffic (~422 flights per month) ; the softest month is June at 78.3%, a 10.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does BOS to PHL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, BOS to PHL ranks #190 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from BOS to PHL? ▼
Flights from Boston to Philadelphia have a 83.5% on-time rate based on 26,282 flights. The average delay is 88.6 minutes. The best recent month was Feb 2024 with 89% on-time.
What is the cancellation rate for BOS to PHL? ▼
Over the last 24 months, 1.8% of flights on this route were cancelled (189 of 10,288 flights) and 0.1% were diverted.
How far is the flight from BOS to PHL? ▼
The flight distance from Boston (BOS) to Philadelphia (PHL) is approximately 280 miles. This route is served by 25 carriers.
When is the best time to fly from BOS to PHL? ▼
The best recent month for on-time performance was Feb 2024 (89% on-time). The worst was Oct 2025 (68% on-time). Consider booking during months with historically better performance.

Airports on this route

BOS Airport

Boston
PHL Airport

Philadelphia
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using BOS–PHL data

BOS–PHL runs 4.5 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare BOS and PHL airport profiles: delay causes and top routes differ even on the same corridor. BOS airport
  • If your dates flex, November (88.5% on-time) beats June (78.3%) on this corridor. Seasonal chart
  • 4 other routes post a similar 83.5% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.