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 4% of the time at 6 am and 1 time in 3 at 4 pm.

Nonstops (seasonal or thin)


Delta	RDU	SEA	6h 06m	85%	1.4%	364	Flying now
Alaska	RDU	SEA	5h 58m	75%	1.6%	554	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 Raleigh/Durham). Layovers up to 4 hours. Pick a connection for the details.


United Details →	RDU 06:00 → IAD 07:11UA 1789	1h 49m Dulles	IAD 09:00 → SEA 11:51UA 2101	8h 51m	99%	89%
Delta Details →	RDU 07:00 → AUS 09:11DL 4921 · flown by Endeavor	2h 08m Austin	AUS 11:19 → SEA 13:54DL 1684	9h 54m	97%	89%
American Details →	RDU 05:01 → MIA 07:12AA 1088	1h 08m Miami	MIA 08:20 → SEA 11:56AA 654	9h 55m	93%	85%
American Details →	RDU 06:50 → PHX 08:27AA 2601	3h 05m Phoenix	PHX 11:32 → SEA 14:49AA 3440 · flown by Envoy	10h 56m	99%	85%
Delta Details →	RDU 07:10 → SLC 09:42DL 580	3h 38m Salt Lake City	SLC 13:20 → SEA 14:40DL 2921	10h 30m	100%	84%
Delta Details →	RDU 06:00 → MSP 07:46DL 2538	3h 24m Minneapolis	MSP 11:10 → SEA 12:58DL 889	9h 58m	98%	84%
Delta Details →	RDU 07:30 → ATL 08:59DL 2478	2h 11m Atlanta	ATL 11:10 → SEA 13:38DL 648	9h 08m	97%	83%
United Details →	RDU 08:30 → DEN 10:17UA 2383	3h 43m Denver	DEN 14:00 → SEA 16:00UA 2164	10h 30m	98%	82%
Tight connection: often missed
Delta Details →	RDU 13:53 → JFK 15:50DL 5009 · flown by Endeavor	1h 00m New York	JFK 16:50 → SEA 20:19DL 740	9h 26m	68%	44%
American Details →	RDU 11:41 → DFW 13:45AA 2366	48m Dallas-Fort Worth	DFW 14:33 → SEA 16:47AA 727	8h 06m	65%	36%
American Details →	RDU 17:30 → MIA 19:49AA 2406	46m Miami	MIA 20:35 → SEA 00:07 +1AA 3252	9h 37m	39%	25%

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

ATL · 1h 13m · leaves 09:58 2%

CLT · 1h 05m · leaves 05:01 4%

MCO · 1h 17m · leaves 06:00 5%

Afternoon and evening

DEN · 1h 10m · leaves 16:55 45%

DFW · 58m · leaves 19:31 53%

MIA · 46m · leaves 17:30 61%

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 2601 RDU 06:50 → PHX Delta DL 2419 PHX 12:05 → SEA Connection details →	3h 38m	11h 28m	99%	92%
United UA 1789 RDU 06:00 → IAD Alaska AS 361 IAD 09:30 → SEA Connection details →	2h 19m	9h 16m	98%	85%
Southwest WN 1795 RDU 13:15 → PHX American AA 4307 PHX 17:55 → SEA Connection details →	3h 10m	10h 50m	100%	84%

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