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 5% of the time at 11 am and 27% of the time at 12 am.

Nonstops


Delta	SEA	ATL	4h 53m	85%	0.6%	2,380	Flying now
Alaska	SEA	ATL	4h 54m	83%	0.6%	897	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	SEA 21:25 → BWI 05:20WN 3613	3h 00m Baltimore	BWI 08:20 → ATL 10:20 +1WN 3931	9h 53m	100%	92%
Delta Details →	SEA 17:00 → SMF 19:01DL 4043 · flown by SkyWest	2h 59m Sacramento	SMF 22:00 → ATL 05:32 +1DL 878	9h 32m	99%	91%
Delta Details →	SEA 23:59 → MSP 05:17DL 953	3h 11m Minneapolis	MSP 08:28 → ATL 11:54 +1DL 1052	8h 55m	100%	88%
Southwest Details →	SEA 23:05 → MDW 05:00WN 2304	2h 15m Chicago	MDW 07:15 → ATL 10:05 +1WN 3054	8h 00m	95%	88%
American Details →	SEA 22:35 → PHL 06:48AA 2522	2h 44m Philadelphia	PHL 09:32 → ATL 11:53 +1AA 4338 · flown by Republic	10h 18m	100%	88%
Delta Details →	SEA 08:25 → SJC 10:49DL 3736 · flown by SkyWest	1h 57m San Jose	SJC 12:46 → ATL 20:35DL 809	9h 10m	97%	88%
Delta Details →	SEA 08:35 → BOI 11:15DL 3678 · flown by SkyWest	2h 49m Boise	BOI 14:04 → ATL 20:19DL 874	8h 44m	100%	87%
Delta Details →	SEA 23:15 → MCO 07:42DL 448	2h 23m Orlando	MCO 10:05 → ATL 11:41 +1DL 2204	9h 26m	100%	86%
Tight connection: often missed
American Details →	SEA 12:44 → PHL 21:06AA 2534	52m Philadelphia	PHL 21:58 → ATL 00:15 +1AA 443	8h 31m	72%	54%
Delta Details →	SEA 10:10 → SNA 13:10DL 952	50m Santa Ana	SNA 14:00 → ATL 21:27DL 329	8h 17m	64%	49%
Frontier Details →	SEA 20:13 → LAS 22:54F9 2408	56m Las Vegas	LAS 23:50 → ATL 06:57 +1F9 2428	7h 46m	61%	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

DEN · 1h 17m · leaves 05:00 1%

DFW · 1h 08m · leaves 05:05 5%

LAX · 1h 00m · leaves 07:15 7%

Afternoon and evening

PHL · 52m · leaves 12:44 28%

LAS · 56m · leaves 20:13 39%

MDW · 50m · leaves 11:45 64%

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 3931 BWI 08:20 → ATL Connection details →	2h 39m	9h 42m	100%	92%
Alaska AS 624 SEA 22:39 → IND Delta DL 1901 IND 08:05 → ATL Connection details →	2h 21m	8h 05m	96%	92%
Alaska AS 280 SEA 22:12 → CMH Delta DL 3165 CMH 08:08 → ATL Connection details →	2h 28m	8h 33m	100%	91%

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