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 70-minute layover misses 2% of the time at 9 am and 23% of the time at 8 pm.

Nonstops


Delta	PHX	BOS	4h 58m	78%	2.1%	429	Flying now
American	PHX	BOS	4h 51m	78%	1.6%	1,313	Flying now
JetBlue	PHX	BOS	4h 49m	74%	2.2%	273	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 (Boston is 3 h ahead of Phoenix). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	PHX 23:55 → MDW 05:10WN 3298	4h 00m Chicago	MDW 09:10 → BOS 12:28 +1WN 1405	9h 33m	100%	92%
American Details →	PHX 23:35 → CLT 06:35AA 849	2h 20m Charlotte	CLT 08:55 → BOS 11:08 +1AA 1533	8h 33m	96%	92%
United Details →	PHX 18:54 → LAX 20:31UA 4722 · flown by SkyWest	3h 28m Los Angeles	LAX 23:59 → BOS 08:40 +1UA 2210	10h 46m	100%	89%
Delta Details →	PHX 23:59 → ATL 06:39DL 929	1h 56m Atlanta	ATL 08:35 → BOS 11:14 +1DL 2432	8h 15m	98%	89%
Delta Details →	PHX 17:05 → SLC 19:43DL 1738	3h 48m Salt Lake City	SLC 23:31 → BOS 06:05 +1DL 696	10h 00m	98%	89%
American Details →	PHX 21:50 → JFK 05:47AA 1587	2h 37m New York	JFK 08:24 → BOS 09:48 +1AA 4376 · flown by Republic	8h 58m	98%	87%
Southwest Details →	PHX 22:25 → BWI 05:40WN 1170	2h 35m Baltimore	BWI 08:15 → BOS 09:50 +1WN 884	8h 25m	100%	86%
American Details →	PHX 23:52 → DCA 07:14AA 1542	2h 26m Washington	DCA 09:40 → BOS 11:24 +1AA 4691 · flown by Republic	8h 32m	99%	86%
Tight connection: often missed
American Details →	PHX 14:03 → CLT 21:18AA 1211	1h 08m Charlotte	CLT 22:26 → BOS 00:37 +1AA 1843	7h 34m	68%	47%
United Details →	PHX 13:16 → SFO 15:19UA 1427	56m San Francisco	SFO 16:15 → BOS 01:11 +1UA 2001	8h 55m	49%	43%
Southwest Details →	PHX 15:25 → DEN 18:10WN 3265	55m Denver	DEN 19:05 → BOS 01:00 +1WN 1494	6h 35m	27%	4%

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

SLC · 1h 10m · leaves 06:00 2%

LAX · 58m · leaves 06:00 6%

DEN · 1h 00m · leaves 06:15 8%

Afternoon and evening

EWR · 50m · leaves 11:40 35%

SFO · 56m · leaves 13:16 51%

DEN · 55m · leaves 15:25 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.


American AA 2156 PHX 22:14 → EWR Delta DL 5764 EWR 09:30 → BOS Connection details →	3h 30m	9h 41m	96%	89%
Southwest WN 1170 PHX 22:25 → BWI Delta DL 5703 BWI 09:00 → BOS Connection details →	3h 20m	9h 14m	100%	88%
Southwest WN 2438 PHX 18:55 → LAX United UA 2210 LAX 23:59 → BOS Connection details →	3h 39m	10h 45m	98%	87%

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