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Route · SEA → JFK · 2020–2025 BTS data

Seattle to New York

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to JFK (Seattle to New York) ranks #540 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

77.3%
On-time
-1.7 pts
vs US avg
71 min
Delay when late
16,268
Flights
#540 of 4927
Corpus placement

Cancelled

1.5%

Best Month

Nov 2024 93%

Worst Month

Jul 2025 52%

Distance

2,422 mi

Carriers

8

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 232 61 13 0 DL,AS
Nov 2025 234 36 6 10 DL,AS
Oct 2025 273 64 5 2 AS,B6,DL
Sep 2025 270 63 1 2 DL,AS,B6
Aug 2025 278 95 2 2 AS,B6,DL
Jul 2025 279 135 8 5 AS,B6,DL
Jun 2025 270 125 4 0 AS,B6,DL
May 2025 279 98 1 0 AS,B6,DL
Apr 2025 228 52 1 2 DL,AS,B6
Mar 2025 217 49 0 0 AS,DL
Feb 2025 162 30 1 0 AS,DL
Jan 2025 163 33 0 1 AS,DL
Dec 2024 237 44 0 0 AS,DL
Nov 2024 234 16 0 0 AS,DL
Oct 2024 248 46 0 1 AS,DL,B6
Sep 2024 269 67 0 0 AS,B6,DL
Aug 2024 279 80 11 2 AS,B6,DL
Jul 2024 279 92 10 1 AS,B6,DL
Jun 2024 270 63 1 0 AS,B6,DL
May 2024 279 69 1 1 AS,B6,DL
Apr 2024 253 62 0 1 AS,B6,DL
Mar 2024 224 50 2 1 AS,B6,DL
Feb 2024 177 43 2 0 AS,B6,DL
Jan 2024 186 32 21 2 AS,B6,DL

SEA–JFK seasonal on-time pattern

Best: November (84.8%) · weakest: June (68.6%)

65%70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 74.1%

Strongest calendar month

November

84.8% on-time · ~230 flights/mo

Busiest calendar month

August

~264 flights/mo avg

Weakest calendar month

June

68.6% on-time · ~229 flights/mo

Cancellation Rate

1.5%

90 of 5,820 flights

Diversion Rate

0.6%

33 of 5,820 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

SEA - Seattle

Full on-time, delay-cause, and seasonal performance for Seattle, WA.

SEA on-time profile

JFK - New York

Full on-time, delay-cause, and seasonal performance for New York, NY.

JFK on-time profile

Compare the two airports

See SEA and JFK side by side on delays, cancellations, and reliability.

Compare SEA vs JFK

Origin-hub reliability standing

Mid-pack among SEA departures

From SEA, this corridor sits with 63 other 75–85% on-time routes out of 89 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: New York · fleet on-time rank #4032 of 4927.

What the Data Says About SEA to JFK

The Seattle to New York corridor (SEA to JFK) posts a 77.3% on-time rate on the lower edge of the average band, based on 16,268 tracked flights. Late flights run 70.6 minutes behind on average. 8 carriers cover the 2,422-mile route; over the last 24 months, 90 of 5,820 flights were cancelled (1.5%) and 0.6% diverted.

The monthly split is wide on this route: Nov 2024 posted the strongest performance at 93% on-time, while Jul 2025 came in at just 52% - a 42-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–JFK peaks in November at 84.8% on-time while August carries the heaviest traffic (~264 flights per month) ; the softest month is June at 68.6%, a 16.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to JFK rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to JFK ranks #540 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from SEA to JFK? ▼
Flights from Seattle to New York have a 77.3% on-time rate based on 16,268 flights. The average delay is 70.6 minutes. The best recent month was Nov 2024 with 93% on-time.
What is the cancellation rate for SEA to JFK? ▼
Over the last 24 months, 1.5% of flights on this route were cancelled (90 of 5,820 flights) and 0.6% were diverted.
How far is the flight from SEA to JFK? ▼
The flight distance from Seattle (SEA) to New York (JFK) is approximately 2,422 miles. This route is served by 8 carriers.
When is the best time to fly from SEA to JFK? ▼
The best recent month for on-time performance was Nov 2024 (93% on-time). The worst was Jul 2025 (52% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
JFK Airport

New York
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using SEA–JFK data

SEA–JFK is mid-pack at 77.3% on-time; month and carrier mix move more than the corridor headline.

  • Compare SEA and JFK airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, November (84.8% on-time) beats June (68.6%) on this corridor. Seasonal chart
  • 4 other routes post a similar 77.3% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.