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 90-minute layover misses 2% of the time at 9 am and 1 time in 4 at 3 pm.

Nonstops


United	EWR	SEA	6h 11m	77%	1.5%	996	Flying now
Alaska	EWR	SEA	6h 13m	72%	2.8%	1,267	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 Newark). Layovers up to 4 hours. Pick a connection for the details.


United Details →	EWR 06:00 → IAD 07:22UA 1366	1h 38m Dulles	IAD 09:00 → SEA 11:51UA 2101	8h 51m	98%	87%
United Details →	EWR 06:30 → DEN 08:45UA 670	2h 37m Denver	DEN 11:22 → SEA 13:22UA 1424	9h 52m	99%	85%
United Details →	EWR 06:00 → LAX 08:53UA 2434	2h 50m Los Angeles	LAX 11:43 → SEA 14:36UA 325	11h 36m	96%	84%
United Details →	EWR 07:59 → ORD 09:43UA 2488	3h 47m Chicago	ORD 13:30 → SEA 16:09UA 1660	11h 10m	100%	82%
Delta Details →	EWR 07:15 → SLC 10:13DL 1009	3h 07m Salt Lake City	SLC 13:20 → SEA 14:40DL 2921	10h 25m	97%	81%
American Details →	EWR 07:15 → PHX 09:28AA 1282	2h 04m Phoenix	PHX 11:32 → SEA 14:49AA 3440 · flown by Envoy	10h 31m	93%	80%
Alaska Details →	EWR 06:30 → PDX 09:33AS 1630	2h 30m Portland	PDX 12:03 → SEA 13:03AS 3078 · flown by SkyWest	9h 33m	96%	80%
Delta Details →	EWR 06:00 → ATL 08:24DL 2353	2h 46m Atlanta	ATL 11:10 → SEA 13:38DL 648	10h 38m	95%	80%
Tight connection: often missed
United Details →	EWR 15:40 → IAH 18:46UA 2815	1h 09m Houston	IAH 19:55 → SEA 22:42UA 2456	10h 02m	71%	50%
American Details →	EWR 12:21 → DFW 15:10AA 1441	1h 45m Dallas-Fort Worth	DFW 16:55 → SEA 19:15AA 2009	9h 52m	70%	39%
United Details →	EWR 15:41 → DEN 18:23UA 663	47m Denver	DEN 19:10 → SEA 21:10UA 360	8h 29m	52%	34%

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

IAH · 1h 19m · leaves 06:00 2%

CLT · 1h 19m · leaves 06:00 4%

ORD · 1h 03m · leaves 06:00 8%

Afternoon and evening

MSP · 1h 08m · leaves 18:45 23%

ATL · 55m · leaves 13:29 23%

IAH · 1h 09m · leaves 15:40 29%

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.


United UA 2035 EWR 06:05 → AUS Delta DL 1684 AUS 11:19 → SEA Connection details →	2h 17m	10h 49m	100%	94%
United UA 2646 EWR 06:30 → PHX Delta DL 2419 PHX 12:05 → SEA Connection details →	3h 23m	11h 48m	100%	92%
United UA 2423 EWR 06:42 → SNA Alaska AS 548 SNA 12:05 → SEA Connection details →	2h 30m	11h 12m	98%	89%

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