New York to Seattle Flight Delays
Sample size: 8,807 JFK–SEA flights, January 2023 to December 2025 (BTS). 20.98% of New York to Seattle flights arrived at least 15 minutes late. That is 3.2 points better than the 24.2% median for those routes, making this one of the steadier pairings in the network. Departure time moves the odds more than anything else on this route: 10:00 departures run 9.02% late against 39.46% for 18:00. Tuesday is the calmest day at 17.38%, Friday the worst at 23.22%. Cancellations (2024 to 2025) peak in January at 5.67% of scheduled flights and bottom out in March at 0.23%. Last updated: 2026-10-01.
These figures are historical US domestic rates, not a forecast for one departure. Use the per-flight delay estimate before you book.
JFK airport delay guide · SEA airport delay guide · Predict a JFK to SEA flight
Best time to fly JFK to SEA
The best time to fly JFK to SEA is the 10 AM departure and fly on a Tuesday, not a Friday (17.38% against 23.22%): 9.02% of 10 AM flights arrived 15+ minutes late, against 39.46% at 6 PM.
Lowest observed delay rates depart 06:00, 10:00–11:00. The highest sit at 17:00–19:00. Only departure hours with at least 100 recorded flights are listed, so sparse hours are blank rather than estimated.
| Departure hour | Delayed 15+ min | Flights observed |
|---|---|---|
| 06:00 | 9.76% | 205 |
| 07:00 | 14.85% | 1,886 |
| 09:00 | 15.52% | 638 |
| 10:00 | 9.02% | 122 |
| 11:00 | 12.83% | 1,614 |
| 16:00 | 22.61% | 1,906 |
| 17:00 | 26.6% | 376 |
| 18:00 | 39.46% | 1,158 |
| 19:00 | 27.56% | 675 |
JFK to SEA flight time and distance
Scheduled gate-to-gate time from JFK to SEA is a median 6 h 20 min. Flights actually took a median 6 h 7 min gate to gate, including 5 h 27 min in the air. 4.8% ran 30 or more minutes over schedule and 71.5% arrived sooner than scheduled (BTS data, January 2023 to December 2025).
JFK to SEA is 2,422 miles (BTS data).
| Airline | Scheduled (median) | Actual (median) | In the air (median) | 30+ min over schedule | Flights |
|---|---|---|---|---|---|
| Alaska Airlines | 6 h 17 min | 6 h 7 min | 5 h 28 min | 5.2% | 4,011 |
| Delta Air Lines | 6 h 23 min | 6 h 6 min | 5 h 27 min | 4.2% | 3,880 |
| JetBlue Airways | 6 h 26 min | 6 h 12 min | 5 h 27 min | 5.9% | 916 |
How late, and why
When a JFK to SEA flight was late (15+ minutes), it arrived an average of 65 minutes late (median 38). 6.9% of all completed flights arrived an hour or more late (BTS data, 2023 to 2025).
Of the delay minutes on late JFK to SEA flights, 38.7% were caused by the airline (crew, maintenance, ground handling), 34.5% by the air-traffic system (volume, non-extreme weather, airport operations), 23.8% by a late incoming aircraft, 2.3% by extreme weather and 0.8% by security (BTS data, 2023 to 2025).
| Cause | Share of delay minutes |
|---|---|
| airline | 38.7% |
| air-traffic system | 34.5% |
| late incoming aircraft | 23.8% |
| extreme weather | 2.3% |
| security | 0.8% |
BTS assigns causes to delay minutes on flights that arrived 15+ minutes late. "Air-traffic system" includes non-extreme weather that slows traffic.
JFK to SEA delays by day of week
| Day | Delayed 15+ min | Flights observed |
|---|---|---|
| Mon | 20.14% | 1,281 |
| Tue | 17.38% | 1,243 |
| Wed | 18.89% | 1,244 |
| Thu | 22.99% | 1,266 |
| Fri | 23.22% | 1,279 |
| Sat | 21.95% | 1,221 |
| Sun | 22.23% | 1,273 |
Month-by-month cancellation pattern
Share of scheduled JFK–SEA flights cancelled in each month, from BTS 2024–2025 on-time reporting. These are cancellations, not delays. Delay figures on this page cover January 2023 to December 2025.
| Month | Cancelled | Flights scheduled |
|---|---|---|
| Jan | 5.67% | 353 |
| Feb | 1.18% | 339 |
| Mar | 0.23% | 439 |
| Apr | 0.62% | 481 |
| May | 0.36% | 558 |
| Jun | 1.11% | 540 |
| Jul | 3.41% | 558 |
| Aug | 2.15% | 557 |
| Sep | 0.37% | 540 |
| Oct | 1.16% | 519 |
| Nov | 1.49% | 469 |
| Dec | 2.78% | 468 |
Airlines on JFK to SEA: delays and cancellations
Alaska Airlines, Delta Air Lines and JetBlue Airways fly this route today. Only carriers with at least 200 scheduled flights on the pairing are listed. Delay rates cover January 2023 to December 2025; cancellation rates cover 2024 to 2025.
| Airline | Share of flights | Delayed 15+ min | Cancelled | Flights scheduled |
|---|---|---|---|---|
| Alaska Airlines | 46% | 19.7% | 2.37% | 2,698 |
| Delta Air Lines | 45% | 20.49% | 1.02% | 2,644 |
| JetBlue Airways | 8% | 28.71% | 0.84% | 479 |
Related pages
- JFK delays: rate, worst hours and live risk
- SEA delays: rate, worst hours and live risk
- US airline cancellation rates
- Thanksgiving and Christmas 2026 flight delay guide
- Predict a JFK to SEA flight
Check your odds: Will my flight be delayed? · Will my flight be cancelled?
JFK vs SEA: airport conditions
Both ends of a route shape its delay profile. These are DelayGuard's operational scores for New York and Seattle.
| Measure | JFK (New York) | SEA (Seattle) |
|---|---|---|
| Congestion | high | high |
| Weather risk | moderate | moderate |
| NAS vulnerability | high | moderate |
| Average taxi-out | 28 min | 14 min |
| Runways | 4 | 3 |
JFK to SEA questions
- How long is the flight from New York to Seattle?
- Scheduled gate-to-gate time from JFK to SEA is a median 6 h 20 min, and flights actually took a median 6 h 7 min including 5 h 27 min in the air. 4.8% ran 30+ minutes over schedule (BTS data, January 2023 to December 2025).
- How often do JFK to SEA flights get delayed?
- Across 8,807 recorded JFK–SEA departures, January 2023 to December 2025 (BTS), 20.98% arrived at least 15 minutes late. Departure time matters most: 10:00 departures run 9.02% late against 39.46% for 18:00. Actual delay frequency varies by airline, time of day, and season.
- What is the best time of year to fly JFK to SEA?
- New York (NY) sees its highest delays during December–February (winter weather) and June–August (summer storms). Seattle (WA) peaks during November–February (coastal fog) with generally low risk year-round. The dominant seasonal risk on this route sits at the origin (New York) — use the DelayGuard predictor to check conditions for your specific travel date.
- Which airline is most reliable on JFK to SEA?
- On JFK→SEA, Alaska Airlines has the lowest measured delay rate at 19.7% of 4,011 flights, and JetBlue Airways the highest at 28.71% (BTS, January 2023 to December 2025). JetBlue Airways cancels the fewest at 0.84% (2024 to 2025). These are route-specific figures, not airline-wide averages.
- How late are JFK to SEA flights when they are delayed?
- When a JFK to SEA flight was late (15+ minutes), it arrived an average of 65 minutes late (median 38). 6.9% of all completed flights arrived an hour or more late (BTS data, 2023 to 2025).
- How accurate is DelayGuard's delay prediction for this route?
- DelayGuard's delay risk score comes from an ML model trained on BTS data (3.95 million US domestic flights, 2023 to mid-2025), with live weather data (within 5 days of departure) and FAA NAS advisories (within 6 hours) — a likelihood of delay, not a guarantee.
Delay figures reflect arrivals 15 or more minutes late in BTS on-time reporting. Cancellation figures are separate and count flights that never operated. Hours, days and months with fewer than 100 recorded flights are omitted rather than estimated.