Route on-time record

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

Philadelphia (Philadelphia International Airport) to Boston (Boston Logan International Airport). 4,909 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 3.0% were cancelled. The most reliable flight number was Republic 5740 at 6:00 AM.

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

PHL → BOS

Philadelphia to Boston: 4,909 nonstop flights a year

On time (12 months)

75%

Cancelled

3.0%

avg delay 21 min

Best time to leave

Before 9 AM

89% on time vs 60% 6 to 9 PM

Most reliable airline

Frontier

79% chance on time

Check PHL to BOS fares

Lowest nonstop fare seen in the next two months: $95 (American 1874 on 2026-10-23). 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 · Republic 5740 · sold as American Eagle, Delta Connection or United Express
6:00 AM → 7:32 AM1h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
On time (history)
93%
Cancelled
1.9%
Avg arrival delay
4 min
- Arrived on time 93% of the time (352 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: 60%).
- Departs outside PHL's trouble window (2 PM to 8 PM, when 72% of its 95 ground stops and delay programs started).
Strong track record · 352 flights
Find 6:00 AM flight fares Opens this date on Aviasales
#2 · American 3225
7:20 AM → 8:41 AM1h 21m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
On time (history)
93%
Cancelled
1.6%
Avg arrival delay
3 min
- Arrived on time 93% of the time (61 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: 60%).
- Departs outside PHL's trouble window (2 PM to 8 PM, when 72% of its 95 ground stops and delay programs started).
Moderate track record · 61 flights
Find American 3225 fares Opens this date on Aviasales
#3 · Republic 4367 · sold as American Eagle, Delta Connection or United Express
10:50 AM → 12:26 PM1h 36m nonstop
Local times, typical schedule. Last flown 2026-05-20.
86%
chance on time
On time (history)
93%
Cancelled
0.0%
Avg arrival delay
2 min
- Arrived on time 93% of the time (44 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Departs outside PHL's trouble window (2 PM to 8 PM, when 72% of its 95 ground stops and delay programs started).
- Lands inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
Limited track record · 44 flights
Find 10:50 AM flight fares Opens this date on Aviasales
#4 · Republic 4785 · sold as American Eagle, Delta Connection or United Express
11:02 AM → 12:34 PM1h 32m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 100% of the time (9 flights, Jun 2025 to May 2026).
- Departs outside PHL's trouble window (2 PM to 8 PM, when 72% of its 95 ground stops and delay programs started).
- Lands inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
- Short track record (9 flights), so its score leans on the airline's record at this hour.
Limited track record · 9 flights
Find 11:02 AM flight fares Opens this date on Aviasales
#5 · American 1416
10:16 AM → 11:46 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
On time (history)
87%
Cancelled
0.6%
Avg arrival delay
11 min
- Arrived on time 87% of the time (163 flights, Jun 2025 to May 2026).
- Departs outside PHL's trouble window (2 PM to 8 PM, when 72% of its 95 ground stops and delay programs started).
Moderate track record · 163 flights
Find American 1416 fares Opens this date on Aviasales
#6 · Republic 5845 · sold as American Eagle, Delta Connection or United Express
9:26 AM → 11:00 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
On time (history)
88%
Cancelled
2.9%
Avg arrival delay
7 min
- Arrived on time 88% of the time (301 flights, Jun 2025 to May 2026).
- Departs outside PHL's trouble window (2 PM to 8 PM, when 72% of its 95 ground stops and delay programs started).
Strong track record · 301 flights
Find 9:26 AM flight fares Opens this date on Aviasales
#7 · American 2783
7:00 AM → 8:26 AM1h 26m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
On time (history)
88%
Cancelled
0.7%
Avg arrival delay
10 min
- Arrived on time 88% of the time (141 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: 60%).
- Departs outside PHL's trouble window (2 PM to 8 PM, when 72% of its 95 ground stops and delay programs started).
- 57% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 141 flights
Find American 2783 fares Opens this date on Aviasales
#8 · JetBlue 260
6:00 AM → 7:17 AM1h 17m nonstop
Local times, typical schedule. Last flown 2026-05-19.
84%
chance on time
On time (history)
88%
Cancelled
3.5%
Avg arrival delay
7 min
- Arrived on time 88% of the time (137 flights, Jun 2025 to May 2026).
- Cancelled 3.5% of the time (5 of 142).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 60%).
- Departs outside PHL's trouble window (2 PM to 8 PM, when 72% of its 95 ground stops and delay programs started).
Moderate track record · 137 flights
Find JetBlue 260 fares Opens this date on Aviasales
#9 · American 2928
8:46 AM → 10:21 AM1h 35m nonstop
Local times, typical schedule. Last flown 2026-05-20.
82%
chance on time
On time (history)
92%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 92% of the time (38 flights, Jun 2025 to May 2026).
- Never cancelled in 38 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 60%).
- Departs outside PHL's trouble window (2 PM to 8 PM, when 72% of its 95 ground stops and delay programs started).
Limited track record · 38 flights
Find American 2928 fares Opens this date on Aviasales
#10 · JetBlue 1160
9:21 AM → 10:44 AM1h 23m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
On time (history)
81%
Cancelled
1.3%
Avg arrival delay
12 min
- Arrived on time 81% of the time (156 flights, Jun 2025 to May 2026).
- Departs outside PHL's trouble window (2 PM to 8 PM, when 72% of its 95 ground stops and delay programs started).
Moderate track record · 156 flights
Find JetBlue 1160 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Frontier Airlines79%
65 flights · 86% on time as flown · 2.5% cancel
Republic Airways (sold as American Eagle, Delta Connection or United Express)76%
1,745 flights · 80% on time as flown · 3.2% cancel
JetBlue71%
894 flights · 72% on time as flown · 2.4% cancel
American Airlines70%
2,205 flights · 71% on time as flown · 3.1% cancel

On time by departure time

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

Before 9 AM89%
1,243 flights · avg delay 8 min
9 AM to noon86%
997 flights · avg delay 9 min
Noon to 3 PM68%
689 flights · avg delay 29 min
3 to 6 PM61%
1,061 flights · avg delay 34 min
6 to 9 PM60%
599 flights · avg delay 32 min
After 9 PM71%
320 flights · avg delay 21 min

Best day: Wednesday (80%). Worst: Monday (73%).

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 aircraft41%
Air traffic control and airport volume31%
Airline (crew, maintenance, boarding)23%
Severe weather5%

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

PHL to BOS questions

What time of day is best to fly PHL to BOS?: Before 9 AM: 89% of flights arrived on time, against 60% 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 PHL to BOS?: Frontier, with a season-adjusted 79% 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 PHL to BOS?: July (67% 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.

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