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 4% of the time at 9 am and 28% of the time at 5 pm.

Nonstops


United	IAH	IAD	3h 08m	82%	0.4%	1,871	Flying now
United	IAH	BWI	3h 07m	81%	0.9%	906	Flying now
United	IAH	DCA	3h 08m	76%	0.7%	2,406	Flying now
Southwest	HOU	BWI	2h 55m	75%	1.4%	1,479	Flying now
American	IAH	DCA	3h 10m	74%	5.6%	873	Flying now
Southwest	HOU	DCA	2h 55m	71%	1.7%	1,052	Flying now
Frontier	IAH	BWI	3h 15m	52%	5.4%	149	Flying now
Spirit	IAH	BWI	2h 58m	79%	1.8%	332	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	HOU 07:35 → ABQ 08:40WN 1943	1h 15m Albuquerque	ABQ 09:55 → BWI 15:40WN 103	7h 05m	97%	93%
United Details →	IAH 07:30 → MSY 08:46UA 491	3h 31m New Orleans	MSY 12:17 → IAD 15:50UA 2497	7h 20m	100%	91%
United Details →	IAH 07:20 → SAT 08:27UA 2250	3h 34m San Antonio	SAT 12:01 → IAD 16:28UA 2250	8h 08m	100%	91%
United Details →	IAH 05:15 → DEN 06:47UA 1874	1h 13m Denver	DEN 08:00 → IAD 13:26UA 1101	7h 11m	97%	90%
United Details →	IAH 08:00 → MCI 10:03UA 2266	2h 27m Kansas City	MCI 12:30 → IAD 16:03UA 688	7h 03m	100%	89%
United Details →	IAH 05:04 → ORD 07:59UA 1044	3h 08m Chicago	ORD 11:07 → IAD 14:12UA 1869	8h 08m	100%	89%
United Details →	IAH 07:35 → AUS 08:39UA 2016	3h 21m Austin	AUS 12:00 → IAD 16:19UA 2344	7h 44m	100%	89%
Southwest Details →	HOU 05:50 → ATL 08:50WN 2622	1h 25m Atlanta	ATL 10:15 → BWI 12:10WN 186	5h 20m	100%	88%
Tight connection: often missed
United Details →	IAH 11:55 → ORD 14:51UA 2827	1h 02m Chicago	ORD 15:53 → IAD 19:02UA 2437	6h 07m	68%	47%
American Details →	HOU 12:46 → DFW 14:09AA 6413 · flown by SkyWest	47m Dallas-Fort Worth	DFW 14:56 → DCA 18:59AA 3101	5h 13m	68%	33%
American Details →	IAH 13:36 → ORD 16:35AA 1915	1h 21m Chicago	ORD 17:56 → DCA 20:59AA 1787	6h 24m	65%	33%

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

MCO · 1h 20m · leaves 05:00 0%

ORD · 1h 01m · leaves 05:04 3%

DEN · 1h 13m · leaves 05:15 3%

Afternoon and evening

DFW · 1h 06m · leaves 16:14 38%

PHL · 48m · leaves 14:31 55%

TPA · 50m · leaves 14:40 76%

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.


Southwest WN 4483 HOU 05:00 → MCO American AA 2088 MCO 10:40 → DCA Connection details →	2h 15m	6h 59m	100%	91%
Southwest WN 1796 HOU 07:50 → MSY United UA 2497 MSY 12:17 → IAD Connection details →	3h 17m	7h 00m	100%	91%
Southwest WN 1970 HOU 05:30 → DEN United UA 789 DEN 09:30 → DCA Connection details →	2h 35m	8h 29m	100%	91%

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