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

The nonstop is quickest: Southwest SEA → DAL (3h 55m), on time almost half the time. Southwest via Phoenix (6h 50m) is more reliable, 74%, but takes 2h 55m longer.

Nonstops (seasonal or thin)


Southwest	SEA	DAL	3h 55m	46%	0.0%	219	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Dallas on time. Total trip = scheduled departure to arrival, layover included (Dallas is 2 h ahead of Seattle). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	SEA 23:59 → ATL 07:46DL 652	2h 29m Atlanta	ATL 10:15 → DAL 11:24 +1DL 1115	9h 25m	99%	89%
Southwest Details →	SEA 21:25 → BWI 05:20WN 3613	2h 55m Baltimore	BWI 08:15 → DAL 10:25 +1WN 930	11h 00m	100%	85%
Delta Details →	SEA 22:58 → ATL 06:45DL 409	1h 27m Atlanta	ATL 08:12 → DAL 09:24 +1DL 441	8h 28m	97%	85%
Southwest Details →	SEA 23:05 → MDW 05:00WN 2304	1h 40m Chicago	MDW 06:40 → DAL 09:00 +1WN 3796	7h 55m	89%	82%
Delta Details →	SEA 06:00 → ATL 13:49DL 569	2h 49m Atlanta	ATL 16:38 → DAL 17:55DL 2780	9h 55m	100%	76%
Southwest Details →	SEA 06:30 → PHX 09:15WN 3001	1h 40m Phoenix	PHX 10:55 → DAL 15:20WN 3255	6h 50m	100%	74%
Southwest Details →	SEA 06:15 → OAK 08:25WN 266	2h 35m Oakland	OAK 11:00 → DAL 16:25WN 3014	8h 10m	100%	73%
Delta Details →	SEA 11:56 → ATL 19:54DL 554	1h 21m Atlanta	ATL 21:15 → DAL 22:34DL 1104	8h 38m	89%	71%
Tight connection: often missed
Southwest Details →	SEA 14:25 → SAN 17:20WN 4910	50m San Diego	SAN 18:10 → DAL 23:15WN 3492	6h 45m	26%	10%

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 15m · leaves 05:15 4%

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 464 SEA 23:31 → ATL Delta DL 1115 ATL 10:15 → DAL Connection details →	2h 51m	9h 53m	98%	88%
Alaska AS 781 SEA 21:36 → BWI Southwest WN 930 BWI 08:15 → DAL Connection details →	2h 34m	10h 49m	100%	85%
Alaska AS 639 SEA 21:18 → TPA Southwest WN 1327 TPA 09:00 → DAL Connection details →	3h 12m	11h 12m	99%	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