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 70-minute layover misses 6% of the time at 10 am and 1 time in 5 at 3 pm.

Nonstops


United	IAH	PHL	3h 24m	82%	1.0%	1,023	Flying now
American	IAH	PHL	3h 20m	77%	3.0%	842	Flying now
Frontier	IAH	PHL	3h 31m	72%	1.4%	72	Flying now
Spirit	IAH	PHL	3h 16m	91%few flights	8.3%	12	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	IAH 05:15 → DEN 06:47UA 1874	2h 48m Denver	DEN 09:35 → PHL 15:12UA 1575	8h 57m	99%	87%
United Details →	IAH 07:20 → IAD 11:28UA 1549	1h 27m Dulles	IAD 12:55 → PHL 14:10UA 3541 · flown by Republic	5h 50m	97%	83%
Delta Details →	IAH 05:40 → ATL 08:43DL 1069	2h 38m Atlanta	ATL 11:21 → PHL 13:24DL 2279	6h 46m	99%	81%
United Details →	IAH 18:19 → DEN 20:14UA 1654	3h 45m Denver	DEN 23:59 → PHL 05:31 +1UA 1214	10h 12m	98%	81%
American Details →	IAH 20:15 → LAX 21:55AA 5005 · flown by SkyWest	1h 47m Los Angeles	LAX 23:42 → PHL 07:57 +1AA 2758	10h 42m	95%	80%
Delta Details →	IAH 06:30 → MSP 09:18DL 1050	1h 51m Minneapolis	MSP 11:09 → PHL 14:43DL 2679	7h 12m	95%	80%
American Details →	IAH 05:02 → DFW 06:19AA 2551	2h 21m Dallas-Fort Worth	DFW 08:40 → PHL 13:02AA 2128	7h 00m	95%	79%
Delta Details →	IAH 07:35 → SLC 09:51DL 1583	1h 29m Salt Lake City	SLC 11:20 → PHL 17:39DL 2022	9h 05m	93%	79%
Tight connection: often missed
American Details →	IAH 20:15 → LAX 21:55AA 5005 · flown by SkyWest	51m Los Angeles	LAX 22:46 → PHL 07:00 +1AA 3276	9h 45m	69%	42%
Frontier Details →	IAH 08:20 → FLL 12:01F9 1496	49m Fort Lauderdale	FLL 12:50 → PHL 15:42F9 2932	6h 25m	46%	28%
American Details →	IAH 16:18 → DFW 17:48AA 3583 · flown by Envoy	47m Dallas-Fort Worth	DFW 18:35 → PHL 22:57AA 3242	5h 39m	60%	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 07m · leaves 05:04 2%

CLT · 1h 17m · leaves 06:01 6%

ATL · 1h 16m · leaves 07:02 7%

Afternoon and evening

ATL · 1h 01m · leaves 18:34 27%

LAX · 51m · leaves 20:15 31%

DFW · 47m · leaves 16:18 40%

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.


Delta DL 1069 IAH 05:40 → ATL American AA 4338 ATL 12:25 → PHL Connection details →	3h 42m	7h 56m	99%	92%
United UA 1874 IAH 05:15 → DEN American AA 2344 DEN 08:41 → PHL Connection details →	1h 54m	8h 05m	96%	80%
United UA 6131 IAH 13:58 → DTW Delta DL 2402 DTW 21:35 → PHL Connection details →	3h 36m	8h 19m	100%	79%

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