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 7% of the time at 7 am and barely half the time at 8 pm.

Nonstops


United	IAH	BOS	3h 53m	76%	1.1%	1,559	Flying now
JetBlue	IAH	BOS	3h 57m	59%	2.8%	460	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	IAH 18:19 → DEN 20:14UA 1654	3h 45m Denver	DEN 23:59 → BOS 05:58 +1UA 2656	10h 39m	98%	88%
United Details →	IAH 05:15 → DEN 06:47UA 1874	58m Denver	DEN 07:45 → BOS 13:49UA 558	7h 34m	96%	86%
United Details →	IAH 05:04 → ORD 07:59UA 1044	1h 16m Chicago	ORD 09:15 → BOS 12:57UA 1117	6h 53m	99%	86%
United Details →	IAH 20:15 → LAX 21:54UA 2095	2h 05m Los Angeles	LAX 23:59 → BOS 08:40 +1UA 2210	11h 25m	96%	85%
Delta Details →	IAH 19:01 → SLC 21:15DL 1299	2h 16m Salt Lake City	SLC 23:31 → BOS 06:05 +1DL 696	10h 04m	94%	84%
United Details →	IAH 06:30 → DEN 08:02UA 2643	1h 38m Denver	DEN 09:40 → BOS 15:44UA 1232	8h 14m	98%	83%
United Details →	IAH 06:00 → LAX 07:29UA 2110	1h 06m Los Angeles	LAX 08:35 → BOS 17:20UA 1783	10h 20m	100%	82%
American Details →	IAH 06:01 → CLT 09:43AA 2011	1h 35m Charlotte	CLT 11:18 → BOS 13:33AA 1611	6h 32m	94%	82%
Tight connection: often missed
United Details →	IAH 12:13 → IAD 16:30UA 2366	55m Dulles	IAD 17:25 → BOS 19:14UA 688	6h 01m	74%	45%
United Details →	IAH 11:55 → ORD 14:51UA 2827	1h 04m Chicago	ORD 15:55 → BOS 19:30UA 2466	6h 35m	69%	33%
American Details →	IAH 13:36 → ORD 16:35AA 1915	46m Chicago	ORD 17:21 → BOS 20:59AA 1461	6h 24m	43%	19%

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 16m · leaves 05:04 1%

ATL · 1h 17m · leaves 05:40 3%

DEN · 58m · leaves 05:15 4%

Afternoon and evening

ATL · 56m · leaves 18:34 30%

EWR · 50m · leaves 14:49 52%

ORD · 46m · leaves 13:36 57%

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 1874 IAH 05:15 → DEN Southwest WN 3690 DEN 10:00 → BOS Connection details →	3h 13m	9h 50m	97%	80%
American AA 5005 IAH 20:15 → LAX United UA 2210 LAX 23:59 → BOS Connection details →	2h 04m	11h 25m	86%	76%
United UA 1697 IAH 07:00 → LGA Delta DL 5739 LGA 14:00 → BOS Connection details →	2h 31m	7h 29m	98%	75%

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