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 90-minute layover misses 2% of the time at 8 am and 27% of the time at 10 pm.

Nonstops


American	PHL	SEA	6h 14m	73%	2.2%	649	Flying now
Delta	PHL	SEA	6h 14m	72%	0.0%	82	Flying now
Alaska	PHL	SEA	6h 04m	69%	1.7%	657	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	PHL 06:10 → IAD 07:19UA 3693 · flown by Republic	1h 41m Dulles	IAD 09:00 → SEA 11:51UA 2101	8h 41m	99%	89%
American Details →	PHL 07:05 → PHX 09:05AA 428	2h 27m Phoenix	PHX 11:32 → SEA 14:49AA 3440 · flown by Envoy	10h 41m	99%	84%
Delta Details →	PHL 05:15 → ATL 07:22DL 1269	3h 48m Atlanta	ATL 11:10 → SEA 13:38DL 648	11h 23m	100%	84%
United Details →	PHL 08:00 → DEN 10:01UA 2307	3h 59m Denver	DEN 14:00 → SEA 16:00UA 2164	11h 00m	100%	84%
Delta Details →	PHL 07:23 → SLC 10:06DL 2023	1h 29m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	8h 29m	95%	83%
United Details →	PHL 08:05 → ORD 09:34UA 1811	3h 56m Chicago	ORD 13:30 → SEA 16:09UA 1660	11h 04m	99%	83%
American Details →	PHL 09:45 → PHX 11:49AA 2820	2h 46m Phoenix	PHX 14:35 → SEA 17:44AA 4035 · flown by Envoy	10h 59m	99%	83%
Delta Details →	PHL 05:40 → MSP 07:23DL 2791	3h 47m Minneapolis	MSP 11:10 → SEA 12:58DL 889	10h 18m	97%	82%
Tight connection: often missed
Alaska Details →	PHL 17:46 → PDX 20:37AS 1787	53m Portland	PDX 21:30 → SEA 22:27AS 2421 · flown by Horizon	7h 41m	58%	52%
American Details →	PHL 11:02 → DFW 13:38AA 417	55m Dallas-Fort Worth	DFW 14:33 → SEA 16:47AA 727	8h 45m	74%	40%
American Details →	PHL 16:22 → DFW 19:09AA 2356	1h 04m Dallas-Fort Worth	DFW 20:13 → SEA 22:26AA 2003	9h 04m	72%	37%

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

IAH · 1h 16m · leaves 06:15 3%

SFO · 1h 17m · leaves 06:00 4%

ORD · 1h 15m · leaves 06:00 4%

Afternoon and evening

PDX · 53m · leaves 17:46 42%

BNA · 53m · leaves 13:55 48%

DEN · 55m · leaves 16:50 73%

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.


American AA 428 PHL 07:05 → PHX Delta DL 2419 PHX 12:05 → SEA Connection details →	3h 00m	11h 13m	99%	91%
American AA 3090 PHL 08:20 → PDX Delta DL 4062 PDX 15:26 → SEA Connection details →	3h 53m	11h 21m	99%	88%
Delta DL 2023 PHL 07:23 → SLC Alaska AS 664 SLC 12:51 → SEA Connection details →	2h 45m	9h 41m	97%	85%

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