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 5% of the time at 8 am and barely half the time at 7 pm.

Nonstops


Delta	BWI	BOS	1h 39m	82%	3.7%	1,094	Flying now
Southwest	BWI	BOS	1h 30m	73%	2.4%	2,376	Flying now
Spirit	BWI	BOS	1h 26m	71%	4.3%	47	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Boston on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


American Details →	BWI 05:02 → CLT 06:26AA 1708	2h 29m Charlotte	CLT 08:55 → BOS 11:08AA 1533	6h 06m	99%	94%
Southwest Details →	BWI 06:10 → MDW 07:10WN 995	2h 00m Chicago	MDW 09:10 → BOS 12:28WN 1405	6h 18m	95%	87%
American Details →	BWI 06:15 → CLT 07:53AA 2670	3h 25m Charlotte	CLT 11:18 → BOS 13:33AA 1611	7h 18m	99%	87%
United Details →	BWI 06:15 → ORD 07:30UA 709	1h 45m Chicago	ORD 09:15 → BOS 12:57UA 1117	6h 42m	100%	87%
American Details →	BWI 05:44 → ORD 07:12AA 4659 · flown by Republic	1h 18m Chicago	ORD 08:30 → BOS 12:07AA 4106 · flown by Envoy	6h 23m	95%	85%
Delta Details →	BWI 05:40 → ATL 07:31DL 2950	1h 04m Atlanta	ATL 08:35 → BOS 11:14DL 2432	5h 34m	95%	84%
Delta Details →	BWI 07:00 → ATL 08:56DL 2579	2h 14m Atlanta	ATL 11:10 → BOS 13:47DL 862	6h 47m	99%	81%
Southwest Details →	BWI 06:25 → STL 07:45WN 1109	2h 20m St Louis	STL 10:05 → BOS 13:40WN 3891	7h 15m	100%	80%
Tight connection: often missed
United Details →	BWI 15:03 → IAH 17:19UA 2095	56m Houston	IAH 18:15 → BOS 23:19UA 521	8h 16m	62%	42%
United Details →	BWI 17:32 → ORD 18:55UA 590	50m Chicago	ORD 19:45 → BOS 23:21UA 1032	5h 49m	45%	26%
American Details →	BWI 15:46 → DFW 18:12AA 1629	1h 01m Dallas-Fort Worth	DFW 19:13 → BOS 23:59AA 1767	8h 13m	58%	21%

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

ORD · 1h 18m · leaves 05:44 5%

CLT · 1h 02m · leaves 06:15 5%

ATL · 1h 04m · leaves 05:40 5%

Afternoon and evening

IAH · 56m · leaves 15:03 38%

DFW · 1h 01m · leaves 15:46 42%

ORD · 50m · leaves 17:32 55%

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 4566 BWI 06:55 → BUF American AA 4666 BUF 11:22 → BOS Connection details →	3h 12m	6h 02m	100%	92%
Southwest WN 1035 BWI 08:20 → ORF Delta DL 5809 ORF 11:55 → BOS Connection details →	2h 30m	5h 28m	100%	91%
American AA 1708 BWI 05:02 → CLT Delta DL 5626 CLT 09:40 → BOS Connection details →	3h 14m	7h 06m	99%	85%

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