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 3% of the time at 7 am and 2 times in 5 at 6 pm.

Nonstops


United	IAH	PDX	4h 31m	83%	0.2%	874	Flying now
Alaska	IAH	PDX	4h 31m	77%	1.1%	353	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Alaska Details →	IAH 06:02 → SEA 08:40AS 453	1h 34m Seattle	SEA 10:14 → PDX 11:21AS 3090 · flown by SkyWest	7h 19m	97%	93%
United Details →	IAH 08:30 → DEN 10:05UA 2816	3h 22m Denver	DEN 13:27 → PDX 15:13UA 2455	8h 43m	100%	90%
United Details →	IAH 05:22 → SFO 07:22UA 487	1h 00m San Francisco	SFO 08:22 → PDX 10:20UA 2265	6h 58m	97%	88%
Alaska Details →	IAH 08:00 → SEA 10:41AS 241	3h 04m Seattle	SEA 13:45 → PDX 14:48AS 3204 · flown by SkyWest	8h 48m	99%	87%
Delta Details →	IAH 07:10 → LAX 08:39DL 1216	1h 21m Los Angeles	LAX 10:00 → PDX 12:25DL 2766	7h 15m	98%	86%
United Details →	IAH 05:15 → DEN 06:47UA 1874	1h 18m Denver	DEN 08:05 → PDX 09:47UA 1247	6h 32m	97%	85%
United Details →	IAH 09:35 → SFO 11:35UA 2358	3h 20m San Francisco	SFO 14:55 → PDX 16:47UA 2851	9h 12m	98%	84%
United Details →	IAH 06:30 → DEN 08:02UA 2643	3h 25m Denver	DEN 11:27 → PDX 13:09UA 644	8h 39m	100%	84%
Tight connection: often missed
Delta Details →	IAH 14:35 → MSP 17:26DL 2678	1h 08m Minneapolis	MSP 18:34 → PDX 20:17DL 2151	7h 42m	72%	55%
JetBlue Details →	IAH 13:27 → BOS 18:20B6 932	59m Boston	BOS 19:19 → PDX 22:31B6 95	11h 04m	59%	38%
American Details →	IAH 18:53 → DFW 20:25AA 1929	2h 27m Dallas-Fort Worth	DFW 22:52 → PDX 00:52 +1AA 2620	8h 00m	69%	26%

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

ORD · 1h 01m · leaves 05:04 3%

SFO · 1h 00m · leaves 05:22 3%

DEN · 1h 18m · leaves 05:15 3%

Afternoon and evening

BOS · 59m · leaves 13:27 41%

DFW · 1h 07m · leaves 14:04 46%

DTW · 49m · leaves 15:27 46%

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.


United UA 2110 IAH 06:00 → LAX Frontier F9 4499 LAX 09:18 → PDX Connection details →	1h 49m	7h 41m	100%	95%
Frontier F9 3131 IAH 06:10 → ONT Alaska AS 1699 ONT 10:54 → PDX Connection details →	3h 22m	8h 59m	98%	92%
United UA 469 IAH 09:53 → LAX Alaska AS 1315 LAX 14:27 → PDX Connection details →	2h 57m	8h 54m	99%	89%

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