Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: airlines and hours on this route all land within a few points of 73% on time.

Nonstops


American	ORD	BWI	2h 03m	76%	3.9%	1,199	Flying now
United	ORD	BWI	2h 04m	71%	1.4%	1,241	Flying now
Southwest	ORD	BWI	2h 05m	73%	0.0%	93	Not flying now
Frontier	ORD	BWI	2h 05m	67%	4.3%	140	Not flying now
Spirit	ORD	BWI	–	89%few flights	0.0%	18	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 Chicago). Layovers up to 4 hours. Pick a connection for the details.


United Details →	ORD 06:00 → DEN 07:42UA 2806	2h 04m Denver	DEN 09:46 → BWI 15:17UA 1362	8h 17m	100%	87%
Delta Details →	ORD 05:30 → ATL 08:33DL 1264	2h 37m Atlanta	ATL 11:10 → BWI 13:03DL 2711	6h 33m	98%	85%
United Details →	ORD 07:35 → IAH 10:36UA 1231	1h 40m Houston	IAH 12:16 → BWI 16:30UA 1720	7h 55m	97%	78%
Delta Details →	ORD 08:52 → DTW 11:23DL 4456 · flown by SkyWest	3h 46m Detroit	DTW 15:09 → BWI 16:45DL 2480	6h 53m	97%	77%
American Details →	ORD 05:07 → CLT 08:10AA 2842	3h 25m Charlotte	CLT 11:35 → BWI 13:03AA 846	6h 56m	98%	74%
Delta Details →	ORD 08:05 → ATL 11:08DL 2426	2h 54m Atlanta	ATL 14:02 → BWI 15:53DL 2799	6h 48m	98%	74%
Delta Details →	ORD 09:45 → ATL 12:51DL 1178	3h 36m Atlanta	ATL 16:27 → BWI 18:23DL 2928	7h 36m	99%	67%
Delta Details →	ORD 10:29 → BOS 13:59DL 2570	1h 51m Boston	BOS 15:50 → BWI 17:42DL 5644 · flown by Republic	6h 13m	91%	67%
Tight connection: often missed
Delta Details →	ORD 15:22 → ATL 18:36DL 1477	54m Atlanta	ATL 19:30 → BWI 21:25DL 1257	5h 03m	72%	49%
American Details →	ORD 18:47 → CLT 21:59AA 689	46m Charlotte	CLT 22:45 → BWI 00:14 +1AA 1318	4h 27m	50%	35%
American Details →	ORD 16:05 → MIA 20:26AA 2910	51m Miami	MIA 21:17 → BWI 23:54AA 3216	6h 49m	27%	15%

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

DEN · 51m · leaves 07:05 11%

DFW · 1h 16m · leaves 07:00 13%

Afternoon and evening

DFW · 1h 09m · leaves 15:50 31%

CLT · 46m · leaves 18:47 50%

MIA · 51m · leaves 16:05 73%

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 1076 ORD 07:33 → BOS Southwest WN 733 BOS 13:20 → BWI Connection details →	2h 15m	6h 27m	99%	90%
American AA 4439 ORD 06:45 → IND Southwest WN 4388 IND 11:32 → BWI Connection details →	2h 31m	5h 22m	96%	87%
United UA 2034 ORD 07:30 → ALB Southwest WN 4863 ALB 13:00 → BWI Connection details →	2h 17m	5h 50m	96%	84%

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