Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

Connect in the morning. The same one-hour layover misses 12% of the time at 11 am and 1 time in 3 at 8 pm.

Nonstops


Delta	JFK	SEA	6h 20m	73%	3.1%	1,338	Flying now
JetBlue	JFK	SEA	6h 28m	71%	4.2%	166	Flying now
Alaska	JFK	SEA	6h 32m	69%	3.2%	1,402	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Seattle on time. Total trip = scheduled departure to arrival, layover included (Seattle is 3 h behind New York). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	JFK 08:30 → PDX 11:34DL 1574	3h 52m Portland	PDX 15:26 → SEA 16:40DL 4062 · flown by SkyWest	11h 11m	99%	88%
Delta Details →	JFK 16:29 → SLC 20:00DL 887	2h 45m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	10h 30m	96%	87%
Delta Details →	JFK 06:00 → SLC 09:03DL 892	2h 32m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	9h 52m	99%	86%
Delta Details →	JFK 08:10 → PHX 10:30DL 791	1h 35m Phoenix	PHX 12:05 → SEA 15:18DL 2419	10h 08m	95%	85%
Delta Details →	JFK 06:00 → ATL 08:24DL 2286	2h 46m Atlanta	ATL 11:10 → SEA 13:38DL 648	10h 38m	99%	85%
Delta Details →	JFK 07:00 → AUS 10:03DL 1406	1h 16m Austin	AUS 11:19 → SEA 13:54DL 1684	9h 54m	97%	84%
Delta Details →	JFK 07:00 → LAS 09:25DL 607	1h 34m Las Vegas	LAS 10:59 → SEA 13:51DL 2922	9h 51m	95%	83%
Alaska Details →	JFK 09:33 → ANC 13:30AS 1536	3h 00m Anchorage	ANC 16:30 → SEA 21:05AS 268	14h 32m	96%	81%
Tight connection: often missed
Delta Details →	JFK 07:35 → SNA 10:32DL 403	48m Santa Ana	SNA 11:20 → SEA 14:24DL 3966 · flown by SkyWest	9h 49m	65%	47%
American Details →	JFK 16:00 → MIA 19:26AA 1479	1h 09m Miami	MIA 20:35 → SEA 00:07 +1AA 3252	11h 07m	71%	46%
Alaska Details →	JFK 11:30 → SFO 14:50AS 41	1h 00m San Francisco	SFO 15:50 → SEA 18:00AS 1340	9h 30m	64%	43%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

AUS · 1h 16m · leaves 07:00 3%

DFW · 57m · leaves 06:49 9%

LAX · 1h 01m · leaves 08:00 21%

Afternoon and evening

SFO · 59m · leaves 16:20 33%

CLT · 49m · leaves 17:00 37%

SLC · 47m · leaves 18:29 38%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.


American AA 2002 JFK 07:50 → LAS Delta DL 2905 LAS 13:35 → SEA Connection details →	2h 56m	11h 33m	100%	87%
American AA 2683 JFK 08:00 → SNA Alaska AS 760 SNA 14:45 → SEA Connection details →	3h 47m	12h 32m	100%	86%
Delta DL 738 JFK 15:00 → LAX Alaska AS 495 LAX 21:12 → SEA Connection details →	3h 04m	11h 59m	96%	86%

Rank all connections, any airlines →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON