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

No nonstop, and no clear pattern: the best connection reaches Washington on time 9 times in 10.

Best connections, one ticket

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


Southwest Details →	ONT 23:55 → MDW 05:40WN 3153	2h 35m Chicago	MDW 08:15 → DCA 11:10 +1WN 2569	8h 15m	100%	91%
United Details →	ONT 05:00 → DEN 08:20UA 2446	1h 10m Denver	DEN 09:30 → DCA 14:59UA 789	6h 59m	96%	87%
American Details →	ONT 22:10 → CLT 05:48AA 2237	2h 12m Charlotte	CLT 08:00 → DCA 09:29 +1AA 1977	8h 23m	98%	86%
American Details →	ONT 19:15 → PHX 20:36AA 2639	3h 16m Phoenix	PHX 23:52 → DCA 07:14 +1AA 1542	8h 59m	96%	84%
American Details →	ONT 23:59 → DFW 05:00AA 3006	3h 50m Dallas-Fort Worth	DFW 08:50 → DCA 12:52 +1AA 1177	9h 53m	100%	83%
Delta Details →	ONT 06:00 → SLC 08:50DL 2708	1h 40m Salt Lake City	SLC 10:30 → DCA 16:37DL 820	7h 37m	98%	82%
Delta Details →	ONT 22:00 → ATL 05:18DL 2892	2h 07m Atlanta	ATL 07:25 → DCA 09:15 +1DL 926	8h 15m	100%	80%
United Details →	ONT 06:00 → SFO 07:25UA 2363	55m San Francisco	SFO 08:20 → DCA 16:47UA 1678	7h 47m	87%	77%

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 10m · leaves 05:00 4%

DFW · 1h 13m · leaves 05:34 8%

PHX · 1h 00m · leaves 06:11 8%

Afternoon and evening

DFW · 1h 03m · leaves 12:35 25%

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.


Southwest WN 864 ONT 05:15 → PHX American AA 3191 PHX 08:30 → DCA Connection details →	2h 00m	7h 44m	98%	83%
Delta DL 2892 ONT 22:00 → ATL American AA 5050 ATL 08:58 → DCA Connection details →	3h 40m	10h 00m	100%	77%
Southwest WN 3144 ONT 05:50 → DEN Frontier F9 688 DEN 11:26 → DCA Connection details →	2h 21m	8h 08m	100%	77%

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