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 6% of the time at 8 am and 42% of the time at 7 pm.

Nonstops


Alaska	DCA	SEA	5h 59m	79%	0.8%	728	Flying now
Delta	DCA	SEA	5h 55m	69%	2.7%	364	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 Washington). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	DCA 17:50 → SLC 20:37DL 820	2h 08m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	9h 09m	96%	87%
United Details →	DCA 08:25 → ORD 09:43UA 1061	3h 47m Chicago	ORD 13:30 → SEA 16:09UA 1660	10h 44m	100%	84%
Delta Details →	DCA 06:00 → ATL 07:48DL 410	3h 22m Atlanta	ATL 11:10 → SEA 13:38DL 648	10h 38m	99%	84%
Delta Details →	DCA 06:00 → MSP 07:39DL 1193	3h 31m Minneapolis	MSP 11:10 → SEA 12:58DL 889	9h 58m	99%	84%
American Details →	DCA 07:49 → PHX 09:39AA 2006	1h 53m Phoenix	PHX 11:32 → SEA 14:49AA 3440 · flown by Envoy	9h 57m	97%	83%
Delta Details →	DCA 06:59 → ATL 08:51DL 330	3h 44m Atlanta	ATL 12:35 → SEA 14:55DL 629	10h 56m	99%	79%
Frontier Details →	DCA 07:00 → DEN 09:07F9 685	2h 53m Denver	DEN 12:00 → SEA 14:01F9 1175	10h 04m	99%	78%
Alaska Details →	DCA 17:16 → PDX 20:04AS 9	1h 26m Portland	PDX 21:30 → SEA 22:27AS 2421 · flown by Horizon	8h 11m	87%	78%
Tight connection: often missed
Delta Details →	DCA 18:25 → ATL 20:30DL 850	1h 05m Atlanta	ATL 21:35 → SEA 23:59DL 903	8h 34m	72%	55%
Delta Details →	DCA 17:00 → JFK 18:39DL 5713 · flown by Republic	51m New York	JFK 19:30 → SEA 23:08DL 688	9h 08m	61%	37%
United Details →	DCA 17:55 → EWR 19:28UA 4180 · flown by GoJet	1h 02m Newark	EWR 20:30 → SEA 23:44UA 1796	8h 49m	58%	28%

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

SFO · 1h 20m · leaves 07:55 5%

DFW · 1h 03m · leaves 05:00 5%

DTW · 1h 00m · leaves 06:00 6%

Afternoon and evening

JFK · 51m · leaves 17:00 39%

EWR · 1h 02m · leaves 17:55 42%

PHL · 1h 03m · leaves 17:18 59%

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 2006 DCA 07:49 → PHX Delta DL 2419 PHX 12:05 → SEA Connection details →	2h 26m	10h 29m	96%	90%
American AA 2051 DCA 08:00 → LAS Delta DL 2905 LAS 13:35 → SEA Connection details →	3h 25m	11h 23m	99%	87%
American AA 4360 DCA 08:25 → ORD United UA 1660 ORD 13:30 → SEA Connection details →	3h 30m	10h 44m	100%	86%

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