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Route on-time record

JFK to PWM: most on-time flights and the best time to fly

New York (John F. Kennedy International Airport) to Portland (Portland International Jetport). 404 nonstop flights in Jun 2025 to May 2026, 73% arrived within 15 minutes and 5.2% were cancelled. The most reliable flight number was JetBlue 508 at 12:15 PM.

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

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JFK → PWM

New York to Portland: 404 nonstop flights a year

On time (12 months)

73%

Cancelled

5.2%

avg delay 23 min

Best time to leave

Noon to 3 PM

85% on time vs 59% after 9 PM

Most reliable airline

JetBlue

68% chance on time

Check JFK to PWM fares

Lowest nonstop fare seen in the next two months: $182 (JetBlue 308 on 2026-10-22). 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. #1 · JetBlue 508

    12:15 PM → 1:35 PM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    80%

    chance on time

    On time (history)
    82%
    Cancelled
    1.3%
    Avg arrival delay
    14 min
    • Arrived on time 82% of the time (149 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Noon to 3 PM: 85% on time; After 9 PM: 59%).
    • Departs outside JFK's trouble window (1 PM to 7 PM, when 66% of its 168 ground stops and delay programs started).

    Moderate track record · 149 flights

    Find JetBlue 508 fares Opens this date on Aviasales

  2. #2 · JetBlue 308

    10:25 PM → 11:58 PM1h 33m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    56%

    chance on time

    On time (history)
    60%
    Cancelled
    6.8%
    Avg arrival delay
    34 min
    • Arrived on time 60% of the time (178 flights, Jun 2025 to May 2026).
    • Cancelled 6.8% of the time (13 of 191).
    • Leaves in this route's least on-time window (After 9 PM: 59% on time; Noon to 3 PM: 85%).
    • Departs outside JFK's trouble window (1 PM to 7 PM, when 66% of its 168 ground stops and delay programs started).

    Moderate track record · 178 flights

    Find JetBlue 308 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • JetBlue68%

    342 flights · 70% on time as flown · 4.6% cancel

On time by departure time

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

  • Noon to 3 PM85%

    210 flights · avg delay 13 min

  • After 9 PM59%

    170 flights · avg delay 35 min

Best day: Wednesday (83%). Worst: Saturday (73%).

Smarter routing

Nearby airports that run more on time

  • EWR → PWM 78% chance on time

    Newark Liberty International Airport to Portland International Jetport · 938 flights a year · 21 mi from your airports · yours: 69%

    Rank flightsFares

  • LGA → PWM 72% chance on time

    LaGuardia Airport to Portland International Jetport · 1,105 flights a year · 11 mi from your airports · yours: 69%

    Rank flightsFares

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.

J
77
F
91
M
82
A
83
M
79
J
72
J
67
A
67
S
77
O
86
N
94
D
87

What delays this route

  • Late-arriving aircraft53%
  • Airline (crew, maintenance, boarding)39%
  • Air traffic control and airport volume7%

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

Finding the most reliable connections from JFK to PWM…

JFK to PWM questions

What time of day is best to fly JFK to PWM?
Noon to 3 PM: 85% of flights arrived on time, against 59% for departures after 9 PM.
Which airline is most on time from JFK to PWM?
JetBlue, with a season-adjusted 68% chance of operating and arriving on time over 342 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 JFK to PWM?
August (67% on time); the best was November (94%), 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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Live status: FAA delays and ground stops