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 4% of the time at 12 pm and 27% of the time at 10 pm.

Nonstops


Delta	SLC	BOS	4h 38m	84%	1.3%	1,083	Flying now
JetBlue	SLC	BOS	4h 32m	73%	6.4%	173	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 2 h ahead of Salt Lake City). Layovers up to 4 hours. Pick a connection for the details.


American Details →	SLC 23:25 → CLT 05:22AA 2611	3h 33m Charlotte	CLT 08:55 → BOS 11:08 +1AA 1533	9h 43m	96%	92%
Delta Details →	SLC 23:35 → ATL 05:15DL 912	3h 20m Atlanta	ATL 08:35 → BOS 11:14 +1DL 2432	9h 39m	100%	91%
Delta Details →	SLC 23:38 → EWR 06:00DL 2038	3h 30m Newark	EWR 09:30 → BOS 10:55 +1DL 5764 · flown by Republic	9h 17m	99%	90%
Delta Details →	SLC 23:36 → TPA 05:45DL 2077	1h 15m Tampa	TPA 07:00 → BOS 10:11 +1DL 2406	8h 35m	94%	87%
United Details →	SLC 23:59 → IAD 06:13UA 726	2h 22m Dulles	IAD 08:35 → BOS 10:20 +1UA 641	8h 21m	98%	87%
Southwest Details →	SLC 23:35 → BWI 05:40WN 3735	2h 35m Baltimore	BWI 08:15 → BOS 09:50 +1WN 884	8h 15m	100%	86%
Delta Details →	SLC 23:40 → BWI 05:49DL 2079	3h 11m Baltimore	BWI 09:00 → BOS 10:39 +1DL 5703 · flown by Republic	8h 59m	99%	86%
Delta Details →	SLC 23:59 → PHL 06:12DL 2075	3h 18m Philadelphia	PHL 09:30 → BOS 10:59 +1DL 5845 · flown by Republic	9h 00m	99%	85%
Tight connection: often missed
Delta Details →	SLC 20:44 → SEA 22:05DL 2016	1h 10m Seattle	SEA 23:15 → BOS 07:35 +1DL 473	8h 51m	62%	50%
United Details →	SLC 09:49 → SFO 11:13UA 5970 · flown by SkyWest	1h 12m San Francisco	SFO 12:25 → BOS 21:21UA 1372	9h 32m	43%	33%
American Details →	SLC 14:00 → DFW 17:50AA 2613	1h 23m Dallas-Fort Worth	DFW 19:13 → BOS 23:59AA 1767	7h 59m	74%	28%

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

MSP · 1h 14m · leaves 08:00 4%

DEN · 58m · leaves 07:00 5%

TPA · 1h 15m · leaves 23:36 6%

Afternoon and evening

MIA · 53m · leaves 13:57 36%

SEA · 1h 10m · leaves 20:44 38%

DEN · 50m · leaves 16:45 82%

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 3735 SLC 23:35 → BWI Delta DL 5703 BWI 09:00 → BOS Connection details →	3h 20m	9h 04m	100%	88%
Delta DL 1586 SLC 18:30 → DEN United UA 2656 DEN 23:59 → BOS Connection details →	3h 57m	9h 28m	96%	87%
Delta DL 1451 SLC 17:25 → PHX American AA 2701 PHX 21:45 → BOS Connection details →	3h 38m	10h 20m	100%	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