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 75-minute layover misses 4% of the time at 10 am and 31% of the time at 7 pm.

Nonstops


Delta	BOS	SLC	5h 13m	79%	1.2%	1,083	Flying now
JetBlue	BOS	SLC	5h 34m	59%	5.2%	173	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Salt Lake City on time. Total trip = scheduled departure to arrival, layover included (Salt Lake City is 2 h behind Boston). Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	BOS 06:03 → PDX 09:19AS 311	1h 36m Portland	PDX 10:55 → SLC 13:59AS 3112 · flown by SkyWest	9h 56m	99%	91%
Delta Details →	BOS 05:30 → ATL 08:15DL 2242	1h 50m Atlanta	ATL 10:05 → SLC 12:10DL 387	8h 40m	100%	90%
United Details →	BOS 06:21 → LAX 09:35UA 360	3h 20m Los Angeles	LAX 12:55 → SLC 15:48UA 5371 · flown by SkyWest	11h 27m	100%	89%
Delta Details →	BOS 07:15 → MSP 09:30DL 1138	2h 59m Minneapolis	MSP 12:29 → SLC 14:22DL 2651	9h 07m	99%	87%
Delta Details →	BOS 06:20 → LAX 09:35DL 479	3h 35m Los Angeles	LAX 13:10 → SLC 16:07DL 1647	11h 47m	99%	84%
United Details →	BOS 07:45 → DEN 10:19UA 647	3h 21m Denver	DEN 13:40 → SLC 15:13UA 1840	9h 28m	100%	83%
Delta Details →	BOS 08:45 → CVG 11:09DL 5601 · flown by Republic	1h 21m Hebron	CVG 12:30 → SLC 14:14DL 678	7h 29m	95%	83%
Delta Details →	BOS 08:05 → ATL 10:49DL 923	3h 06m Atlanta	ATL 13:55 → SLC 15:51DL 423	9h 48m	98%	83%
Tight connection: often missed
Delta Details →	BOS 09:05 → JFK 10:24DL 5720 · flown by Republic	46m New York	JFK 11:10 → SLC 14:18DL 917	7h 13m	75%	60%
United Details →	BOS 17:00 → ORD 19:00UA 2040	1h 10m Chicago	ORD 20:10 → SLC 22:48UA 1710	7h 48m	69%	38%
JetBlue Details →	BOS 16:07 → JFK 17:25B6 317	52m New York	JFK 18:17 → SLC 21:49B6 71	7h 41m	56%	38%

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

MIA · 1h 01m · leaves 05:10 4%

DEN · 1h 15m · leaves 06:25 5%

ORD · 57m · leaves 06:00 7%

Afternoon and evening

ORD · 1h 10m · leaves 17:00 31%

PHL · 59m · leaves 17:05 42%

JFK · 52m · leaves 16:07 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.


United UA 360 BOS 06:21 → LAX Delta DL 1194 LAX 11:41 → SLC Connection details →	2h 06m	10h 13m	97%	87%
American AA 2315 BOS 07:00 → PHX Delta DL 1431 PHX 13:20 → SLC Connection details →	3h 47m	11h 01m	99%	87%
Alaska AS 311 BOS 06:03 → PDX Delta DL 1209 PDX 13:15 → SLC Connection details →	3h 56m	12h 09m	100%	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