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 11 am and 23% of the time at 6 pm.

Nonstops (seasonal or thin)


Alaska	SEA	RDU	5h 11m	82%	0.7%	554	Flying now
Delta	SEA	RDU	5h 02m	78%	1.4%	364	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	SEA 22:58 → ATL 06:45DL 409	1h 58m Atlanta	ATL 08:43 → RDU 10:10 +1DL 1699	8h 12m	100%	92%
Delta Details →	SEA 23:59 → ATL 07:46DL 652	3h 28m Atlanta	ATL 11:14 → RDU 12:44 +1DL 1488	9h 45m	99%	89%
Delta Details →	SEA 21:45 → ATL 05:36DL 567	1h 49m Atlanta	ATL 07:25 → RDU 08:53 +1DL 2634	8h 08m	97%	89%
United Details →	SEA 23:00 → EWR 07:18UA 1274	2h 42m Newark	EWR 10:00 → RDU 11:52 +1UA 3631 · flown by Republic	9h 52m	98%	88%
United Details →	SEA 23:49 → IAH 06:10UA 2379	2h 05m Houston	IAH 08:15 → RDU 12:02 +1UA 6148 · flown by Mesa	9h 13m	97%	87%
United Details →	SEA 05:00 → DEN 08:43UA 2601	1h 06m Denver	DEN 09:49 → RDU 15:16UA 2269	7h 16m	98%	86%
Delta Details →	SEA 23:10 → DTW 06:27DL 810	3h 48m Detroit	DTW 10:15 → RDU 11:57 +1DL 2164	9h 50m	99%	86%
American Details →	SEA 20:45 → MIA 05:37AA 1471	2h 28m Miami	MIA 08:05 → RDU 10:20 +1AA 2405	10h 35m	95%	86%
Tight connection: often missed
Delta Details →	SEA 08:40 → ATL 16:33DL 797	51m Atlanta	ATL 17:24 → RDU 18:54DL 1097	7h 14m	62%	44%
American Details →	SEA 08:20 → PHL 16:42AA 3219	48m Philadelphia	PHL 17:30 → RDU 19:11AA 5590 · flown by PSA	7h 51m	71%	39%
Southwest Details →	SEA 11:45 → MDW 18:00WN 3081	55m Chicago	MDW 18:55 → RDU 21:45WN 4221	7h 05m	49%	21%

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

DEN · 1h 06m · leaves 05:00 2%

DFW · 1h 10m · leaves 05:05 4%

IAD · 59m · leaves 23:20 11%

Afternoon and evening

ATL · 51m · leaves 08:40 38%

MDW · 55m · leaves 11:45 51%

DEN · 1h 00m · leaves 14:35 86%

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.


Alaska AS 781 SEA 21:36 → BWI Southwest WN 1067 BWI 08:10 → RDU Connection details →	2h 29m	8h 54m	100%	100%
Alaska AS 394 SEA 21:33 → MCO Southwest WN 684 MCO 08:20 → RDU Connection details →	2h 04m	9h 32m	95%	90%
Alaska AS 464 SEA 23:31 → ATL Delta DL 1488 ATL 11:14 → RDU Connection details →	3h 50m	10h 13m	100%	90%

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