Route on-time record

BOS to PHL: most on-time flights and the best time to fly

Boston (Boston Logan International Airport) to Philadelphia (Philadelphia International Airport). 4,913 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 3.1% were cancelled. The most reliable flight number was American 1146 at 6:00 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

BOS → PHL

Boston to Philadelphia: 4,913 nonstop flights a year

On time (12 months)

76%

Cancelled

3.1%

avg delay 23 min

Best time to leave

Before 9 AM

89% on time vs 59% 6 to 9 PM

Most reliable airline

Frontier

77% chance on time

Check BOS to PHL fares

Lowest nonstop fare seen in the next two months: $102 (American 2110 on 2026-10-24). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

#1 · American 1146
6:00 AM → 7:30 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
On time (history)
95%
Cancelled
3.5%
Avg arrival delay
10 min
- Arrived on time 95% of the time (165 flights, Jun 2025 to May 2026).
- Cancelled 3.5% of the time (6 of 172).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Moderate track record · 165 flights
Find American 1146 fares Opens this date on Aviasales
#2 · American 690
5:40 AM → 7:21 AM1h 41m nonstop
Local times, typical schedule. Last flown 2026-04-06.
86%
chance on time
On time (history)
91%
Cancelled
4.1%
Avg arrival delay
25 min
- Arrived on time 91% of the time (142 flights, Jun 2025 to May 2026).
- Cancelled 4.1% of the time (6 of 148).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Moderate track record · 142 flights
Find American 690 fares Opens this date on Aviasales
#3 · Republic 5845 · sold as American Eagle, Delta Connection or United Express
7:05 AM → 8:46 AM1h 41m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
On time (history)
87%
Cancelled
2.2%
Avg arrival delay
7 min
- Arrived on time 87% of the time (312 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Strong track record · 312 flights
Find 7:05 AM flight fares Opens this date on Aviasales
#4 · Republic 5805 · sold as American Eagle, Delta Connection or United Express
11:40 AM → 1:18 PM1h 37m nonstop
Local times, typical schedule. Last flown 2026-05-30.
85%
chance on time
On time (history)
87%
Cancelled
0.0%
Avg arrival delay
8 min
- Arrived on time 87% of the time (200 flights, Jun 2025 to May 2026).
- Never cancelled in 200 scheduled flights.
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Strong track record · 200 flights
Find 11:40 AM flight fares Opens this date on Aviasales
#5 · JetBlue 1159
6:54 AM → 8:31 AM1h 37m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
On time (history)
85%
Cancelled
2.7%
Avg arrival delay
8 min
- Arrived on time 85% of the time (143 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Moderate track record · 143 flights
Find JetBlue 1159 fares Opens this date on Aviasales
#6 · American 3225
9:37 AM → 11:12 AM1h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
0 min
- Arrived on time 100% of the time (11 flights, Jun 2025 to May 2026).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find American 3225 fares Opens this date on Aviasales
#7 · JetBlue 159
6:00 AM → 7:35 AM1h 35m nonstop
Local times, typical schedule. Last flown 2026-05-20.
84%
chance on time
On time (history)
88%
Cancelled
4.3%
Avg arrival delay
6 min
- Arrived on time 88% of the time (90 flights, Jun 2025 to May 2026).
- Cancelled 4.3% of the time (4 of 94).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Moderate track record · 90 flights
Find JetBlue 159 fares Opens this date on Aviasales
#8 · American 2783
10:47 AM → 12:32 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
On time (history)
86%
Cancelled
1.4%
Avg arrival delay
10 min
- Arrived on time 86% of the time (72 flights, Jun 2025 to May 2026).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- 85% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 72 flights
Find American 2783 fares Opens this date on Aviasales
#9 · American 2096
8:00 AM → 9:45 AM1h 38m nonstop
Local times, typical schedule. Last flown 2026-05-20.
83%
chance on time
On time (history)
88%
Cancelled
3.4%
Avg arrival delay
32 min
- Arrived on time 88% of the time (170 flights, Jun 2025 to May 2026).
- Cancelled 3.4% of the time (6 of 176).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 59%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Moderate track record · 170 flights
Find American 2096 fares Opens this date on Aviasales
#10 · American 2764
9:15 AM → 10:52 AM1h 37m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
On time (history)
84%
Cancelled
0.0%
Avg arrival delay
26 min
- Arrived on time 84% of the time (171 flights, Jun 2025 to May 2026).
- Never cancelled in 171 scheduled flights.
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Moderate track record · 171 flights
Find American 2764 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Frontier Airlines77%
65 flights · 83% on time as flown · 2.6% cancel
Republic Airways (sold as American Eagle, Delta Connection or United Express)76%
1,747 flights · 79% on time as flown · 3.6% cancel
American Airlines72%
2,208 flights · 75% on time as flown · 3.0% cancel
JetBlue70%
893 flights · 71% on time as flown · 2.4% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM89%
1,307 flights · avg delay 14 min
9 AM to noon84%
1,008 flights · avg delay 15 min
Noon to 3 PM74%
544 flights · avg delay 28 min
3 to 6 PM68%
1,096 flights · avg delay 25 min
6 to 9 PM59%
936 flights · avg delay 36 min

Best day: Wednesday (82%). Worst: Sunday (76%).

Smarter routing

Nearby airports that run more on time

PVD → PHL 83% chance on time
Rhode Island T. F. Green International Airport to Philadelphia International Airport · 579 flights a year · 49 mi from your airports · yours: 73%
Rank flights Fares

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

What delays this route

Late-arriving aircraft55%
Airline (crew, maintenance, boarding)28%
Air traffic control and airport volume16%
Severe weather2%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

BOS to PHL questions

What time of day is best to fly BOS to PHL?: Before 9 AM: 89% of flights arrived on time, against 59% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from BOS to PHL?: Frontier, with a season-adjusted 77% chance of operating and arriving on time over 65 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on BOS to PHL?: July (73% on time); the best was November (86%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?: No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from BOS

Live status: FAA delays and ground stops

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