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 3% of the time at 6 am and 35% of the time at 7 pm.

Nonstops


United	BWI	IAH	3h 32m	85%	1.3%	906	Flying now
Frontier	BWI	IAH	3h 28m	61%	6.0%	149	Flying now
Spirit	BWI	IAH	3h 33m	76%	2.4%	331	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 Baltimore). Layovers up to 4 hours. Pick a connection for the details.


American Details →	BWI 05:02 → CLT 06:26AA 1708	1h 16m Charlotte	CLT 07:42 → IAH 09:25AA 1930	5h 23m	97%	89%
United Details →	BWI 08:16 → ORD 09:30UA 2749	3h 10m Chicago	ORD 12:40 → IAH 15:40UA 1448	8h 24m	100%	88%
United Details →	BWI 06:15 → ORD 07:30UA 709	2h 55m Chicago	ORD 10:25 → IAH 13:23UA 2638	8h 08m	100%	87%
Delta Details →	BWI 07:00 → ATL 08:56DL 2579	3h 34m Atlanta	ATL 12:30 → IAH 13:38DL 1572	7h 38m	99%	83%
United Details →	BWI 10:32 → ORD 11:48UA 704	2h 27m Chicago	ORD 14:15 → IAH 17:20UA 2451	7h 48m	100%	78%
Delta Details →	BWI 05:40 → ATL 07:31DL 2950	2h 34m Atlanta	ATL 10:05 → IAH 11:18DL 1682	6h 38m	99%	78%
American Details →	BWI 10:31 → ORD 11:46AA 3446 · flown by Envoy	1h 43m Chicago	ORD 13:29 → IAH 16:27AA 4426 · flown by Republic	6h 54m	97%	77%
Delta Details →	BWI 06:08 → DTW 07:40DL 2601	1h 00m Detroit	DTW 08:40 → IAH 10:36DL 1043	5h 28m	94%	76%
Tight connection: often missed
American Details →	BWI 18:39 → MIA 21:25AA 1619	50m Miami	MIA 22:15 → IAH 23:59AA 2230	6h 20m	59%	40%
United Details →	BWI 17:32 → ORD 18:55UA 590	1h 07m Chicago	ORD 20:02 → IAH 22:59UA 2813	6h 27m	65%	35%
American Details →	BWI 19:17 → DFW 21:42AA 1626	1h 05m Dallas-Fort Worth	DFW 22:47 → IAH 23:58AA 1914	5h 41m	53%	22%

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

CLT · 1h 16m · leaves 05:02 3%

ATL · 1h 09m · leaves 07:00 6%

DTW · 1h 00m · leaves 06:08 6%

Afternoon and evening

ORD · 1h 07m · leaves 17:32 35%

MIA · 50m · leaves 18:39 41%

DFW · 1h 05m · leaves 19:17 47%

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 984 BWI 06:35 → MCO United UA 1493 MCO 11:57 → IAH Connection details →	3h 02m	7h 54m	98%	92%
Southwest WN 4689 BWI 06:20 → ATL United UA 425 ATL 11:37 → IAH Connection details →	3h 22m	7h 27m	100%	89%
Southwest WN 1119 BWI 06:45 → TPA United UA 2421 TPA 11:55 → IAH Connection details →	2h 45m	7h 37m	100%	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