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

The nonstop is quickest: Southwest DAL → ONT (3h 15m), on time 7 times in 10. Southwest via Phoenix (5h 05m) is more reliable, 90%, but takes 1h 50m longer.

Nonstops (seasonal or thin)


Southwest	DAL	ONT	3h 15m	70%	1.3%	399	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Ontario on time. Total trip = scheduled departure to arrival, layover included (Ontario is 2 h behind Dallas). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	DAL 06:00 → PHX 06:28WN 1379	1h 22m Phoenix	PHX 07:50 → ONT 09:05WN 759	5h 05m	100%	90%
Southwest Details →	DAL 06:05 → LAS 06:50WN 1318	2h 15m Las Vegas	LAS 09:05 → ONT 10:10WN 4179	6h 05m	100%	82%
Southwest Details →	DAL 07:25 → LAS 08:10WN 2964	3h 20m Las Vegas	LAS 11:30 → ONT 12:32WN 2298	7h 07m	96%	79%
Southwest Details →	DAL 18:50 → PHX 19:15WN 4258	3h 40m Phoenix	PHX 22:55 → ONT 00:08 +1WN 223	7h 17m	100%	77%
Southwest Details →	DAL 06:00 → DEN 07:00WN 1296	50m Denver	DEN 07:50 → ONT 09:10WN 1660	5h 10m	86%	73%
Southwest Details →	DAL 10:25 → PHX 10:55WN 1166	3h 00m Phoenix	PHX 13:55 → ONT 15:05WN 670	6h 40m	100%	68%
Southwest Details →	DAL 07:40 → SMF 09:15WN 4218	2h 45m Sacramento	SMF 12:00 → ONT 13:25WN 300	7h 45m	93%	66%
Southwest Details →	DAL 15:15 → AUS 16:15WN 2411	3h 55m Austin	AUS 20:10 → ONT 21:05WN 372	7h 50m	92%	60%
Tight connection: often missed
Southwest Details →	DAL 18:00 → AUS 19:00WN 1269	1h 10m Austin	AUS 20:10 → ONT 21:05WN 372	5h 05m	69%	45%
Southwest Details →	DAL 15:10 → BWI 19:10WN 1283	1h 00m Baltimore	BWI 20:10 → ONT 22:25WN 200	9h 15m	60%	26%
Southwest Details →	DAL 18:50 → PHX 19:15WN 4258	1h 45m Phoenix	PHX 21:00 → ONT 22:10WN 2862	5h 20m	69%	25%

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 · 50m · leaves 06:00 14%

Afternoon and evening

ATL · 1h 11m · leaves 15:59 24%

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 1408 DAL 07:00 → SLC Delta DL 3172 SLC 11:19 → ONT Connection details →	2h 39m	7h 10m	100%	91%
Southwest WN 1296 DAL 06:00 → DEN Frontier F9 2907 DEN 08:44 → ONT Connection details →	1h 44m	6h 05m	94%	85%
Southwest WN 486 DAL 10:40 → LAS Frontier F9 1357 LAS 13:59 → ONT Connection details →	2h 34m	6h 29m	88%	70%

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