Route on-time record
SEA to JFK: most on-time flights and the best time to fly
Seattle (Seattle–Tacoma International Airport) to New York (John F. Kennedy International Airport). 2,906 nonstop flights in Jun 2025 to May 2026, 73% arrived within 15 minutes and 2.5% were cancelled. The most reliable flight number was Delta 429 at 7:20 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SEA → JFK
Seattle to New York: 2,906 nonstop flights a year
On time (12 months)
73%
Cancelled
2.5%
avg delay 18 min
Best time to leave
Before 9 AM
83% on time vs 62% noon to 3 PM
Most reliable airline
Delta
77% chance on time
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 · Delta 429
7:20 AM → 3:45 PM5h 26m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 88%
- Cancelled
- 3.3%
- Avg arrival delay
- 15 min
- Arrived on time 88% of the time (346 flights, Jun 2025 to May 2026).
- Cancelled 3.3% of the time (12 of 365).
- Leaves in this route's most on-time window (Before 9 AM: 83% on time; Noon to 3 PM: 62%).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
Strong track record · 346 flights
Find Delta 429 fares Opens this date on Aviasales#2 · Delta 1719
4:00 PM → 12:20 AM5h 20m nonstop
Local times, typical schedule. Last flown 2026-05-06.
80%
chance on time
- On time (history)
- 79%
- Cancelled
- 0.9%
- Avg arrival delay
- 15 min
- Arrived on time 79% of the time (211 flights, Jun 2025 to May 2026).
- Departs inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Strong track record · 211 flights
Find Delta 1719 fares Opens this date on Aviasales#3 · Delta 452
10:58 PM → 7:15 AM5h 17m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 80%
- Cancelled
- 2.8%
- Avg arrival delay
- 9 min
- Arrived on time 80% of the time (350 flights, Jun 2025 to May 2026).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
Strong track record · 350 flights
Find Delta 452 fares Opens this date on Aviasales#4 · Delta 722
4:15 PM → 12:43 AM5h 28m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.0%
- Avg arrival delay
- 15 min
- Arrived on time 80% of the time (25 flights, Jun 2025 to May 2026).
- Departs inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
- Short track record (25 flights), so its score leans on the airline's record at this hour.
Limited track record · 25 flights
Find Delta 722 fares Opens this date on Aviasales#5 · Alaska 26
10:44 AM → 7:06 PM5h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 76%
- Cancelled
- 4.1%
- Avg arrival delay
- 13 min
- Arrived on time 76% of the time (345 flights, Jun 2025 to May 2026).
- Cancelled 4.1% of the time (15 of 363).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
Strong track record · 345 flights
Find Alaska 26 fares Opens this date on Aviasales#6 · JetBlue 264
11:52 PM → 8:13 AM5h 21m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
- On time (history)
- 67%
- Cancelled
- 2.4%
- Avg arrival delay
- 24 min
- Arrived on time 67% of the time (162 flights, Jun 2025 to May 2026).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
Moderate track record · 162 flights
Find JetBlue 264 fares Opens this date on Aviasales#7 · Delta 415
1:45 PM → 10:03 PM5h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
70%
chance on time
- On time (history)
- 71%
- Cancelled
- 1.9%
- Avg arrival delay
- 24 min
- Arrived on time 71% of the time (353 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 62% on time; Before 9 AM: 83%).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
Strong track record · 353 flights
Find Delta 415 fares Opens this date on Aviasales#8 · Alaska 22
10:53 PM → 7:12 AM5h 19m nonstop
Local times, typical schedule. Last flown 2026-05-31.
69%
chance on time
- On time (history)
- 70%
- Cancelled
- 1.3%
- Avg arrival delay
- 13 min
- Arrived on time 70% of the time (310 flights, Jun 2025 to May 2026).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
Strong track record · 310 flights
Find Alaska 22 fares Opens this date on Aviasales#9 · Alaska 34
8:00 AM → 4:28 PM5h 28m nonstop
Local times, typical schedule. Last flown 2026-05-31.
66%
chance on time
- On time (history)
- 68%
- Cancelled
- 2.7%
- Avg arrival delay
- 22 min
- Arrived on time 68% of the time (351 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 83% on time; Noon to 3 PM: 62%).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
- Lands inside JFK's trouble window: 66% of its 167 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 351 flights
Find Alaska 34 fares Opens this date on Aviasales#10 · Alaska 84
1:50 PM → 10:21 PM5h 31m nonstop
Local times, typical schedule. Last flown 2026-05-31.
61%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 21 min
- Arrived on time 63% of the time (19 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 62% on time; Before 9 AM: 83%).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
- Short track record (19 flights), so its score leans on the airline's record at this hour.
Limited track record · 19 flights
Find Alaska 84 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines77%
1,337 flights · 80% on time as flown · 2.3% cancel
- JetBlue71%
166 flights · 67% on time as flown · 2.4% cancel
- Alaska Airlines65%
1,403 flights · 67% on time as flown · 2.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM83%
729 flights · avg delay 13 min
- 9 AM to noon66%
606 flights · avg delay 25 min
- Noon to 3 PM62%
519 flights · avg delay 26 min
- 3 to 6 PM81%
209 flights · avg delay 13 min
- After 9 PM74%
843 flights · avg delay 13 min
Best day: Tuesday (79%). Worst: Sunday (71%).
Smarter routing
Nearby airports that run more on time
SEA → EWR 79% chance on time
Seattle–Tacoma International Airport to Newark Liberty International Airport · 2,180 flights a year · 21 mi from your airports · yours: 71%
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
- Air traffic control and airport volume40%
- Airline (crew, maintenance, boarding)33%
- Late-arriving aircraft22%
- Severe weather4%
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
SEA to JFK questions
- What time of day is best to fly SEA to JFK?
- Before 9 AM: 83% of flights arrived on time, against 62% for departures noon to 3 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 SEA to JFK?
- Delta, with a season-adjusted 77% chance of operating and arriving on time over 1,337 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 SEA to JFK?
- July (60% on time); the best was November (88%), 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 SEA
- JFK to SEA (return)
- SEA to LAX 83%
- SEA to PHX 79%
- SEA to SFO 69%
- SEA to ANC 74%
- SEA to DEN 77%
- SEA to LAS 77%
- SEA to ORD 75%
- SEA to GEG 81%
- SEA to DFW 77%
- SEA to PDX 82%
- SEA to SAN 78%
- SEA to SMF 81%
Live status: FAA delays and ground stops