tailodds FORECAST
Tickets
Any day
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 ONT → HOU (3h 00m), on time 2 times in 3. Southwest via Phoenix (5h 25m) is more reliable, 92%, but takes 2h 25m longer.

Nonstops (seasonal or thin)

Nonstop details →
Southwest ONT HOU 3h 00m 67% 0.0% 362 Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Houston on time. Total trip = scheduled departure to arrival, layover included (Houston is 2 h ahead of Ontario). Layovers up to 4 hours. Pick a connection for the details.
SouthwestDetails → ONT 05:15 → PHX 06:30WN 864 1h 35m Phoenix PHX 08:05 → HOU 12:40WN 2833 5h 25m 98% 92%
DeltaDetails → ONT 22:00 → ATL 05:18DL 2892 3h 02m Atlanta ATL 08:20 → HOU 09:28 +1DL 1509 9h 24m 100% 84%
SouthwestDetails → ONT 06:30 → SJC 07:50WN 383 1h 30m San Jose SJC 09:20 → HOU 15:10WN 3673 6h 40m 100% 82%
SouthwestDetails → ONT 21:40 → BWI 05:30WN 3143 1h 20m Baltimore BWI 06:50 → HOU 09:00 +1WN 3246 9h 20m 100% 81%
SouthwestDetails → ONT 05:50 → DEN 09:05WN 3144 1h 10m Denver DEN 10:15 → HOU 13:55WN 1543 6h 05m 98% 79%
Frontier + Southwesttwo ticketsDetails → ONT 06:00 → DEN 09:24F9 1500 3h 06m Denver DEN 12:30 → HOU 16:05WN 1544 8h 05m 97% 76%
SouthwestDetails → ONT 05:30 → LAS 06:35WN 3150 1h 10m Las Vegas LAS 07:45 → HOU 12:55WN 981 5h 23m 98% 75%
SouthwestDetails → ONT 23:55 → MDW 05:40WN 3153 1h 00m Chicago MDW 06:40 → HOU 09:15 +1WN 4497 7h 20m 83% 73%
Tight connection: often missed
SouthwestDetails → ONT 12:50 → DEN 16:05WN 3146 1h 03m Denver DEN 17:08 → HOU 20:45WN 1545 5h 58m 45% 18%
SouthwestDetails → ONT 14:30 → DEN 17:40WN 3147 1h 00m Denver DEN 18:40 → HOU 22:15WN 606 5h 45m 24% 8%

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
BWI · 1h 20m · leaves 21:40 0%
DEN · 1h 10m · leaves 05:50 2%
LAS · 1h 10m · leaves 05:30 2%
Afternoon and evening
DFW · 1h 19m · leaves 10:25 7%
DEN · 1h 03m · leaves 12:50 55%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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