Sun, Oct 4 has passed, so this is the 12-month record.

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 5% of the time at 9 am and 30% of the time at 7 pm.

Best connections, one ticket

Ranked by chance you reach Ontario on time. Total trip = scheduled departure to arrival, layover included (Ontario 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 22m Salt Lake City	SLC 22:59 → ONT 23:48DL 1614	8h 58m	97%	85%
American Details →	DCA 05:00 → DFW 07:22AA 2243	58m Dallas-Fort Worth	DFW 08:20 → ONT 09:29AA 2238	7h 29m	91%	79%
Delta Details →	DCA 06:00 → ATL 07:48DL 410	1h 27m Atlanta	ATL 09:15 → ONT 10:40DL 665	7h 40m	97%	78%
United Details →	DCA 14:55 → IAH 17:14UA 1381	3h 17m Houston	IAH 20:31 → ONT 21:55UA 1563	10h 00m	98%	77%
Frontier Details →	DCA 18:00 → DEN 20:07F9 689	2h 22m Denver	DEN 22:29 → ONT 23:49F9 1261	8h 49m	92%	73%
Alaska Details →	DCA 17:16 → PDX 20:04AS 9	1h 26m Portland	PDX 21:30 → ONT 23:51AS 97	9h 35m	87%	71%
American Details →	DCA 06:59 → DFW 09:26AA 1839	1h 14m Dallas-Fort Worth	DFW 10:40 → ONT 11:45AA 2242	7h 46m	95%	70%
American Details →	DCA 07:49 → PHX 09:39AA 2006	1h 06m Phoenix	PHX 10:45 → ONT 12:02AA 2244	7h 13m	94%	69%
Tight connection: often missed
United Details →	DCA 16:59 → IAH 19:27UA 1785	1h 04m Houston	IAH 20:31 → ONT 21:55UA 1563	7h 56m	70%	55%
American Details →	DCA 17:50 → CLT 19:37AA 2182	1h 06m Charlotte	CLT 20:43 → ONT 22:34AA 3036	7h 44m	74%	44%
United Details →	DCA 18:10 → ORD 19:32UA 2148	46m Chicago	ORD 20:18 → ONT 22:51UA 658	7h 41m	34%	19%

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

DFW · 1h 14m · leaves 06:59 5%

PHX · 1h 06m · leaves 07:49 6%

Afternoon and evening

CLT · 1h 06m · leaves 17:50 26%

IAH · 1h 04m · leaves 16:59 30%

ORD · 46m · leaves 18:10 66%

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 1 DCA 08:00 → SEA Delta DL 4031 SEA 14:35 → ONT Connection details →	3h 37m	12h 19m	99%	86%
Frontier F9 685 DCA 07:00 → DEN United UA 430 DEN 11:25 → ONT Connection details →	2h 18m	8h 47m	96%	84%
American AA 2051 DCA 08:00 → LAS Frontier F9 1357 LAS 13:59 → ONT Connection details →	3h 49m	10h 09m	99%	81%

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