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 1 time in 10 at 10 am and 1 time in 5 at 3 pm.

Nonstops


United	IAH	BWI	3h 07m	81%	0.9%	906	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 Baltimore on time. Total trip = scheduled departure to arrival, layover included (Baltimore 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 59m Denver	DEN 09:46 → BWI 15:17UA 1362	9h 02m	99%	87%
Delta Details →	IAH 05:40 → ATL 08:43DL 1069	2h 27m Atlanta	ATL 11:10 → BWI 13:03DL 2711	6h 23m	99%	85%
United Details →	IAH 05:04 → ORD 07:59UA 1044	2h 52m Chicago	ORD 10:51 → BWI 13:57UA 2653	7h 53m	100%	83%
Delta Details →	IAH 08:05 → ATL 11:09DL 644	2h 53m Atlanta	ATL 14:02 → BWI 15:53DL 2799	6h 48m	100%	78%
United Details →	IAH 20:15 → LAX 21:54UA 2095	1h 11m Los Angeles	LAX 23:05 → BWI 07:14 +1UA 1605	9h 59m	84%	76%
Delta Details →	IAH 05:20 → DTW 09:11DL 1389	59m Detroit	DTW 10:10 → BWI 11:47DL 1546	5h 27m	90%	76%
Delta Details →	IAH 15:27 → DTW 19:15DL 1865	2h 25m Detroit	DTW 21:40 → BWI 23:18DL 2715	6h 51m	98%	74%
Delta Details →	IAH 19:01 → SLC 21:15DL 1299	2h 25m Salt Lake City	SLC 23:40 → BWI 05:49 +1DL 2079	9h 48m	94%	72%
Tight connection: often missed
United Details →	IAH 07:20 → DEN 08:52UA 1575	54m Denver	DEN 09:46 → BWI 15:17UA 1362	6h 57m	74%	65%
Delta Details →	IAH 18:34 → ATL 21:54DL 1223	51m Atlanta	ATL 22:45 → BWI 00:40 +1DL 2590	5h 06m	67%	49%
United Details →	IAH 14:30 → ORD 17:22UA 699	58m Chicago	ORD 18:20 → BWI 21:26UA 440	5h 56m	66%	34%

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

ATL · 1h 05m · leaves 07:02 9%

DTW · 59m · leaves 05:20 10%

DEN · 54m · leaves 07:20 26%

Afternoon and evening

MCO · 1h 11m · leaves 13:16 18%

ORD · 1h 01m · leaves 17:02 22%

ATL · 51m · leaves 18:34 33%

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 6149 IAH 07:20 → MKE Southwest WN 2937 MKE 12:25 → BWI Connection details →	2h 20m	7h 00m	94%	80%
United UA 1030 IAH 07:20 → ATL Delta DL 2799 ATL 14:02 → BWI Connection details →	3h 23m	7h 33m	99%	78%
United UA 2643 IAH 06:30 → DEN Southwest WN 4434 DEN 10:55 → BWI Connection details →	2h 53m	8h 55m	100%	78%

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