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 75-minute layover misses 3% of the time at 8 am and 30% of the time at 4 pm.

Nonstops


United	PHL	IAH	3h 46m	86%	1.0%	1,023	Flying now
American	PHL	IAH	3h 47m	78%	2.9%	840	Flying now
Frontier	PHL	IAH	3h 41m	68%	1.4%	72	Flying now
Spirit	PHL	IAH	3h 44m	67%few flights	0.0%	12	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Houston on time. Total trip = scheduled departure to arrival, layover included (Houston is 1 h behind Philadelphia). Layovers up to 4 hours. Pick a connection for the details.


United Details →	PHL 08:05 → ORD 09:34UA 1811	3h 06m Chicago	ORD 12:40 → IAH 15:40UA 1448	8h 35m	98%	84%
United Details →	PHL 06:10 → IAD 07:19UA 3693 · flown by Republic	1h 21m Dulles	IAD 08:40 → IAH 10:59UA 1524	5h 49m	97%	84%
Delta Details →	PHL 06:25 → ATL 08:32DL 1152	3h 58m Atlanta	ATL 12:30 → IAH 13:38DL 1572	8h 13m	99%	83%
United Details →	PHL 06:00 → ORD 07:30UA 660	2h 55m Chicago	ORD 10:25 → IAH 13:23UA 2638	8h 23m	100%	82%
Delta Details →	PHL 05:15 → ATL 07:22DL 1269	2h 43m Atlanta	ATL 10:05 → IAH 11:18DL 1682	7h 03m	99%	78%
United Details →	PHL 10:00 → DEN 12:01UA 1537	3h 34m Denver	DEN 15:35 → IAH 19:10UA 489	10h 10m	98%	77%
American Details →	PHL 08:58 → ORD 10:38AA 2095	2h 51m Chicago	ORD 13:29 → IAH 16:27AA 4426 · flown by Republic	8h 27m	95%	76%
Delta Details →	PHL 05:40 → MSP 07:23DL 2791	3h 01m Minneapolis	MSP 10:24 → IAH 13:15DL 2673	8h 37m	97%	74%
Tight connection: often missed
Frontier Details →	PHL 12:54 → MCO 15:30F9 4173	1h 06m Orlando	MCO 16:36 → IAH 18:27F9 3469	6h 35m	70%	52%
American Details →	PHL 07:39 → ORD 09:08AA 3074	52m Chicago	ORD 10:00 → IAH 12:46AA 1915	6h 07m	75%	49%
American Details →	PHL 15:00 → DFW 17:50AA 402	46m Dallas-Fort Worth	DFW 18:36 → IAH 19:54AA 1392	5h 54m	57%	27%

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 00m · leaves 05:00 6%

DTW · 50m · leaves 06:10 11%

IAD · 55m · leaves 10:39 16%

Afternoon and evening

FLL · 1h 04m · leaves 17:02 33%

ATL · 1h 01m · leaves 17:12 38%

DFW · 46m · leaves 15:00 43%

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.


American AA 2093 PHL 07:00 → MCO United UA 1493 MCO 11:57 → IAH Connection details →	2h 13m	7h 29m	98%	92%
American AA 3139 PHL 06:00 → CLT United UA 6236 CLT 11:48 → IAH Connection details →	3h 55m	8h 34m	99%	87%
Frontier F9 2059 PHL 07:20 → RDU United UA 6296 RDU 12:45 → IAH Connection details →	4h 00m	8h 24m	99%	86%

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