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

No clear winner: Alaska’s SEA → PIT flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops (seasonal or thin)


Alaska	SEA	PIT	4h 38m	79%	0.6%	470	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	SEA 23:05 → MDW 05:00WN 2304	2h 45m Chicago	MDW 07:45 → PIT 10:15 +1WN 846	8h 10m	98%	95%
Delta Details →	SEA 22:58 → ATL 06:45DL 409	2h 18m Atlanta	ATL 09:03 → PIT 10:45 +1DL 1363	8h 46m	100%	91%
American Details →	SEA 21:35 → CLT 05:41AA 2793	2h 24m Charlotte	CLT 08:05 → PIT 09:30 +1AA 2310	8h 55m	99%	89%
American Details →	SEA 23:56 → ORD 06:02AA 2881	2h 23m Chicago	ORD 08:25 → PIT 11:10 +1AA 4478 · flown by Republic	8h 14m	99%	88%
Delta Details →	SEA 23:59 → MSP 05:17DL 953	2h 12m Minneapolis	MSP 07:29 → PIT 10:33 +1DL 845	7h 34m	100%	88%
Delta Details →	SEA 23:10 → DTW 06:27DL 810	2h 03m Detroit	DTW 08:30 → PIT 09:47 +1DL 5606 · flown by Republic	7h 38m	98%	88%
Delta Details →	SEA 21:45 → ATL 05:36DL 567	1h 54m Atlanta	ATL 07:30 → PIT 09:11 +1DL 1380	8h 26m	98%	86%
Delta Details →	SEA 05:30 → SLC 08:30DL 1128	2h 15m Salt Lake City	SLC 10:45 → PIT 16:30DL 1188	8h 00m	98%	85%
Tight connection: often missed
United Details →	SEA 13:55 → ORD 20:21UA 2101	59m Chicago	ORD 21:20 → PIT 23:59UA 3464 · flown by Republic	7h 04m	64%	49%
United Details →	SEA 10:52 → ORD 17:05UA 2835	1h 00m Chicago	ORD 18:05 → PIT 20:51UA 1946	6h 59m	72%	45%
Southwest Details →	SEA 11:45 → MDW 18:00WN 3081	50m Chicago	MDW 18:50 → PIT 21:15WN 4211	6h 30m	36%	18%

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%

ATL · 1h 17m · leaves 23:59 6%

IAD · 1h 08m · leaves 23:20 9%

Afternoon and evening

PHL · 58m · leaves 08:20 19%

ORD · 59m · leaves 13:55 36%

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 343 SEA 22:22 → DTW Delta DL 5606 DTW 08:30 → PIT Connection details →	2h 49m	8h 26m	98%	89%
Alaska AS 328 SEA 00:17 → ORD American AA 4484 ORD 09:45 → PIT Connection details →	3h 25m	9h 15m	99%	88%
United UA 747 SEA 23:11 → ORD American AA 4478 ORD 08:25 → PIT Connection details →	3h 07m	8h 59m	96%	88%

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