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 50-minute layover misses 1 time in 10 at 9 am and barely half the time at 8 pm.

Nonstops (seasonal or thin)


United	IAH	TUS	2h 53m	86%	0.7%	719	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


United + Deltatwo ticketsDetails →	IAH 09:45 → SLC 11:59UA 756	3h 01m Salt Lake City	SLC 15:00 → TUS 16:07DL 3717 · flown by SkyWest	8h 22m	100%	94%
United + Deltatwo ticketsDetails →	IAH 06:00 → LAX 07:29UA 2110	2h 01m Los Angeles	LAX 09:30 → TUS 11:08DL 3766 · flown by SkyWest	7h 09m	100%	91%
United Details →	IAH 08:30 → DEN 10:05UA 2816	1h 25m Denver	DEN 11:30 → TUS 12:32UA 1188	6h 02m	100%	86%
United + Deltatwo ticketsDetails →	IAH 14:25 → SLC 16:40UA 6207 · flown by Mesa	3h 50m Salt Lake City	SLC 20:30 → TUS 21:33DL 4054 · flown by SkyWest	9h 07m	100%	86%
United + Americantwo ticketsDetails →	IAH 05:04 → ORD 07:59UA 1044	1h 49m Chicago	ORD 09:48 → TUS 11:39AA 2867	8h 29m	98%	84%
Delta Details →	IAH 05:40 → ATL 08:43DL 1069	2h 52m Atlanta	ATL 11:35 → TUS 12:19DL 937	8h 39m	99%	83%
United + Deltatwo ticketsDetails →	IAH 14:54 → LAX 16:27UA 1951	2h 54m Los Angeles	LAX 19:21 → TUS 21:00DL 3846 · flown by SkyWest	8h 06m	100%	82%
United + Americantwo ticketsDetails →	IAH 09:40 → PHX 10:34UA 1895	3h 01m Phoenix	PHX 13:35 → TUS 14:28AA 6373 · flown by SkyWest	6h 48m	98%	82%
Tight connection: often missed
United Details →	IAH 09:35 → SFO 11:35UA 2358	48m San Francisco	SFO 12:23 → TUS 14:47UA 6023 · flown by SkyWest	7h 12m	61%	44%
United Details →	IAH 18:05 → SFO 20:10UA 1341	47m San Francisco	SFO 20:57 → TUS 23:26UA 5688 · flown by SkyWest	7h 21m	49%	37%
American Details →	IAH 18:53 → DFW 20:25AA 1929	2h 29m Dallas-Fort Worth	DFW 22:54 → TUS 23:11AA 1109	6h 19m	70%	31%

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

LAX · 51m · leaves 07:10 10%

DFW · 1h 20m · leaves 09:27 12%

SFO · 48m · leaves 09:35 39%

Afternoon and evening

SFO · 47m · leaves 18:05 51%

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