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 3% of the time at 6 am and 37% of the time at 7 pm.

Nonstops


United	BWI	DEN	3h 58m	87%	0.5%	871	Flying now
Southwest	BWI	DEN	4h 00m	74%	1.5%	1,900	Flying now
Frontier	BWI	DEN	4h 03m	60%	0.0%	43	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Denver on time. Total trip = scheduled departure to arrival, layover included (Denver is 2 h behind Baltimore). Layovers up to 4 hours. Pick a connection for the details.


United Details →	BWI 06:15 → ORD 07:30UA 709	3h 24m Chicago	ORD 10:54 → DEN 12:45UA 581	8h 30m	100%	97%
American Details →	BWI 05:02 → CLT 06:26AA 1708	1h 13m Charlotte	CLT 07:39 → DEN 09:10AA 1754	6h 08m	97%	90%
United Details →	BWI 08:16 → ORD 09:30UA 2749	3h 26m Chicago	ORD 12:56 → DEN 14:46UA 1150	8h 30m	100%	87%
Delta Details →	BWI 07:00 → ATL 08:56DL 2579	3h 54m Atlanta	ATL 12:50 → DEN 14:04DL 957	9h 04m	99%	87%
United Details →	BWI 07:00 → LAX 09:29UA 2318	1h 26m Los Angeles	LAX 10:55 → DEN 14:27UA 2061	9h 27m	93%	83%
Delta Details →	BWI 07:10 → SLC 09:49DL 1176	3h 31m Salt Lake City	SLC 13:20 → DEN 14:56DL 1623	9h 46m	99%	82%
United Details →	BWI 10:32 → ORD 11:48UA 704	1h 42m Chicago	ORD 13:30 → DEN 15:17UA 2802	6h 45m	100%	82%
Southwest Details →	BWI 07:00 → PHX 08:50WN 1049	2h 10m Phoenix	PHX 11:00 → DEN 13:45WN 3262	8h 45m	100%	81%
Tight connection: often missed
United Details →	BWI 17:32 → ORD 18:55UA 590	1h 05m Chicago	ORD 20:00 → DEN 22:01UA 767	6h 29m	63%	44%
United Details →	BWI 15:03 → IAH 17:19UA 2095	1h 00m Houston	IAH 18:19 → DEN 20:14UA 1654	7h 11m	65%	42%
American Details →	BWI 20:00 → ORD 21:32AA 4717 · flown by Republic	1h 02m Chicago	ORD 22:34 → DEN 00:17 +1AA 1387	6h 16m	70%	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

HOU · 1h 20m · leaves 06:50 2%

SFO · 1h 12m · leaves 06:38 3%

CLT · 1h 13m · leaves 05:02 3%

Afternoon and evening

AUS · 1h 00m · leaves 13:50 43%

LAS · 1h 05m · leaves 18:40 45%

DFW · 1h 03m · 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 865 BWI 08:08 → AUS United UA 1541 AUS 12:55 → DEN Connection details →	2h 23m	8h 06m	98%	94%
Southwest WN 986 BWI 08:05 → MCO United UA 1520 MCO 12:50 → DEN Connection details →	2h 30m	8h 46m	100%	93%
American AA 4659 BWI 05:44 → ORD United UA 581 ORD 10:54 → DEN Connection details →	3h 42m	9h 01m	98%	93%

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