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 4 in 5 on time.

Nonstops


Delta	BOS	BWI	1h 49m	83%	3.8%	1,094	Flying now
Southwest	BOS	BWI	1h 40m	78%	2.1%	2,374	Flying now
Spirit	BOS	BWI	1h 30m	70%	4.4%	45	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. Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	BOS 05:25 → MDW 07:00WN 3239	1h 55m Chicago	MDW 08:55 → BWI 11:45WN 1355	6h 20m	100%	90%
Delta Details →	BOS 05:30 → ATL 08:15DL 2242	2h 55m Atlanta	ATL 11:10 → BWI 13:03DL 2711	7h 33m	100%	87%
Delta Details →	BOS 05:30 → DTW 07:39DL 1019	2h 31m Detroit	DTW 10:10 → BWI 11:47DL 1546	6h 17m	98%	82%
United Details →	BOS 06:00 → ORD 07:58UA 1414	2h 53m Chicago	ORD 10:51 → BWI 13:57UA 2653	7h 57m	100%	81%
United Details →	BOS 07:25 → IAH 10:35UA 226	1h 41m Houston	IAH 12:16 → BWI 16:30UA 1720	9h 05m	99%	79%
Delta Details →	BOS 08:05 → ATL 10:49DL 923	3h 13m Atlanta	ATL 14:02 → BWI 15:53DL 2799	7h 48m	98%	77%
Delta Details →	BOS 09:15 → DTW 11:25DL 1748	3h 44m Detroit	DTW 15:09 → BWI 16:45DL 2480	7h 30m	98%	76%
American Details →	BOS 06:05 → CLT 08:30AA 418	3h 05m Charlotte	CLT 11:35 → BWI 13:03AA 846	6h 58m	99%	75%
Tight connection: often missed
American Details →	BOS 17:38 → ORD 19:59AA 1592	1h 26m Chicago	ORD 21:25 → BWI 00:33 +1AA 4663 · flown by Republic	6h 55m	62%	43%
United Details →	BOS 15:13 → ORD 17:05UA 1475	1h 15m Chicago	ORD 18:20 → BWI 21:26UA 440	6h 13m	70%	36%
JetBlue Details →	BOS 08:20 → FLL 11:44B6 669	46m Fort Lauderdale	FLL 12:30 → BWI 14:58B6 2094	6h 38m	71%	36%

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

BNA · 1h 20m · leaves 09:05 4%

CLT · 1h 05m · leaves 08:05 11%

FLL · 46m · leaves 08:20 29%

Afternoon and evening

ATL · 1h 10m · leaves 12:30 10%

CLT · 1h 11m · leaves 18:56 24%

ORD · 1h 01m · leaves 17:38 62%

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.


Delta DL 2242 BOS 05:30 → ATL Southwest WN 186 ATL 10:15 → BWI Connection details →	2h 00m	6h 40m	100%	87%
JetBlue B6 1883 BOS 06:30 → RDU Southwest WN 1059 RDU 11:18 → BWI Connection details →	2h 45m	5h 58m	97%	86%
American AA 4435 BOS 07:00 → IND Southwest WN 4388 IND 11:32 → BWI Connection details →	1h 47m	6h 07m	93%	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