Route
JFK → SEA
John F. Kennedy International Airport Seattle–Tacoma International Airport
How punctual is this route?
- On-time arrivals
- 69.5%
- Less than 15 minutes late
- Cancelled
- 3.4%
- Of scheduled flights
- Average delay when late
- 69 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,906
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 40%
- Airline (crew, maintenance, cleaning) 29%
- Late-arriving aircraft 23%
- Extreme weather 8%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 83.9% | 270 |
| October 2025 | 76.7% | 273 |
| November 2025 | 65.0% | 234 |
| December 2025 | 38.2% | 232 |
| January 2026 | 66.9% | 187 |
| February 2026 | 73.8% | 180 |
| March 2026 | 48.6% | 215 |
| April 2026 | 80.8% | 225 |
| May 2026 | 80.2% | 263 |
| June 2026 | 76.1% | 270 |
| July 2026 | 68.8% | 279 |
| August 2026 | 66.9% | 278 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 1,401 | 68.1% | 3.4% | 69 min |
| Delta Air Lines | 1,339 | 71.4% | 3.2% | 65 min |
| JetBlue Airways | 166 | 65.4% | 6.0% | 98 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
DL699
26% late · 365 flights
-
DL740
31% late · 365 flights
-
AS31
28% late · 363 flights
-
DL688
36% late · 359 flights
-
AS21
31% late · 358 flights
-
AS23
22% late · 356 flights
-
AS17
50% late · 287 flights
-
B6263
35% late · 166 flights
-
DL1719
20% late · 141 flights
-
DL491
13% late · 108 flights
-
AS32
35% late · 34 flights
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