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 2% of the time at 7 am and 44% of the time at 9 pm.

Nonstops


Delta	BOS	PHL	1h 42m	78%	3.4%	1,234	Flying now
American	BOS	PHL	1h 40m	78%	2.9%	2,812	Flying now
JetBlue	BOS	PHL	1h 39m	73%	3.3%	892	Flying now
Frontier	BOS	PHL	1h 40m	84%	0.0%	43	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Philadelphia 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	2h 00m Chicago	MDW 09:00 → PHL 11:55WN 4901	6h 30m	100%	96%
Southwest Details →	BOS 05:50 → STL 07:45WN 752	2h 15m St Louis	STL 10:00 → PHL 13:10WN 3222	7h 20m	100%	88%
American Details →	BOS 09:35 → ACK 10:49AA 4708 · flown by Republic	2h 07m Nantucket	ACK 12:56 → PHL 14:40AA 4735 · flown by Republic	5h 05m	100%	86%
American Details →	BOS 07:00 → STL 09:09AA 3814 · flown by Envoy	2h 07m St Louis	STL 11:16 → PHL 14:36AA 2720	7h 35m	95%	86%
United Details →	BOS 09:25 → IAD 11:07UA 2098	1h 48m Dulles	IAD 12:55 → PHL 14:10UA 3541 · flown by Republic	4h 45m	98%	83%
Delta Details →	BOS 05:30 → DTW 07:39DL 1019	2h 31m Detroit	DTW 10:10 → PHL 11:46DL 2331	6h 19m	98%	83%
Delta Details →	BOS 07:15 → MSP 09:30DL 1138	1h 39m Minneapolis	MSP 11:09 → PHL 14:43DL 2679	7h 27m	98%	82%
Delta Details →	BOS 06:50 → ATL 09:33DL 695	1h 48m Atlanta	ATL 11:21 → PHL 13:24DL 2279	6h 36m	95%	78%
Tight connection: often missed
American Details →	BOS 15:15 → MIA 18:58AA 1565	57m Miami	MIA 19:55 → PHL 22:53AA 3061	7h 38m	64%	44%
American Details →	BOS 18:56 → CLT 21:34AA 1552	55m Charlotte	CLT 22:29 → PHL 00:17 +1AA 2189	5h 21m	65%	44%
American Details →	BOS 17:38 → ORD 19:59AA 1592	1h 43m Chicago	ORD 21:42 → PHL 00:55 +1AA 490	7h 18m	74%	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

IAD · 1h 12m · leaves 05:45 2%

ORD · 1h 08m · leaves 06:00 4%

CLT · 59m · leaves 06:05 5%

Afternoon and evening

CLT · 55m · leaves 18:56 35%

MIA · 57m · leaves 15:15 36%

ORD · 1h 05m · leaves 18:43 44%

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 695 BOS 06:50 → ATL American AA 4338 ATL 12:25 → PHL Connection details →	2h 52m	7h 46m	96%	89%
JetBlue B6 1883 BOS 06:30 → RDU American AA 1846 RDU 10:36 → PHL Connection details →	2h 03m	5h 40m	93%	84%
Delta DL 2066 BOS 06:20 → RDU American AA 948 RDU 10:36 → PHL Connection details →	2h 08m	5h 49m	93%	79%

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