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 1 time in 10 at 6 am and almost half the time at 6 pm.

Nonstops


United	SEA	ORD	4h 10m	81%	0.9%	1,503	Flying now
Delta	SEA	ORD	4h 10m	78%	1.2%	907	Flying now
American	SEA	ORD	4h 16m	74%	1.9%	1,350	Flying now
Alaska	SEA	ORD	4h 09m	74%	1.3%	1,791	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	SEA 23:10 → DTW 06:27DL 810	3h 48m Detroit	DTW 10:15 → ORD 10:50 +1DL 3673 · flown by SkyWest	9h 40m	99%	88%
United Details →	SEA 23:49 → IAH 06:10UA 2379	1h 55m Houston	IAH 08:05 → ORD 11:01 +1UA 1617	9h 12m	97%	88%
United Details →	SEA 17:04 → LAX 19:53UA 1730	2h 42m Los Angeles	LAX 22:35 → ORD 04:51 +1UA 353	9h 47m	97%	86%
United Details →	SEA 23:20 → IAD 07:22UA 264	3h 09m Dulles	IAD 10:31 → ORD 11:53 +1UA 1252	10h 33m	98%	86%
United Details →	SEA 17:20 → SFO 19:37UA 2164	3h 53m San Francisco	SFO 23:30 → ORD 05:57 +1UA 368	10h 37m	100%	85%
Alaska Details →	SEA 19:22 → PDX 20:17AS 2372 · flown by Horizon	2h 42m Portland	PDX 22:59 → ORD 05:00 +1AS 376	7h 38m	98%	83%
Delta Details →	SEA 21:45 → ATL 05:36DL 567	1h 49m Atlanta	ATL 07:25 → ORD 08:35 +1DL 1178	8h 50m	97%	83%
American Details →	SEA 21:35 → CLT 05:41AA 2793	2h 05m Charlotte	CLT 07:46 → ORD 09:02 +1AA 2843	9h 27m	97%	82%
Tight connection: often missed
American Details →	SEA 15:21 → DFW 21:24AA 757	48m Dallas-Fort Worth	DFW 22:12 → ORD 00:50 +1AA 1193	7h 29m	64%	32%
American Details →	SEA 11:40 → DFW 17:50AA 767	48m Dallas-Fort Worth	DFW 18:38 → ORD 21:22AA 1424	7h 42m	53%	20%
United Details →	SEA 08:45 → SFO 11:03UA 2831	57m San Francisco	SFO 12:00 → ORD 18:35UA 2317	7h 50m	28%	13%

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

LAX · 1h 19m · leaves 07:15 3%

ATL · 1h 16m · leaves 23:59 6%

PHX · 57m · leaves 06:16 7%

Afternoon and evening

ATL · 48m · leaves 08:40 41%

DFW · 48m · leaves 11:40 47%

SFO · 47m · leaves 15:33 60%

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 367 SEA 22:43 → IAD United UA 1252 IAD 10:31 → ORD Connection details →	3h 52m	11h 10m	100%	91%
Delta DL 448 SEA 23:15 → MCO United UA 2466 MCO 10:52 → ORD Connection details →	3h 10m	11h 47m	100%	91%
Alaska AS 639 SEA 21:18 → TPA United UA 2804 TPA 07:50 → ORD Connection details →	2h 02m	10h 42m	93%	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