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 6% of the time at 9 am and 27% of the time at 7 pm.

Nonstops


Delta	JFK	DEN	4h 34m	75%	2.3%	966	Flying now
JetBlue	JFK	DEN	4h 41m	70%	4.0%	545	Flying now
Frontier	JFK	DEN	4h 40m	67%	0.0%	49	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	JFK 06:00 → ATL 08:24DL 2286	3h 21m Atlanta	ATL 11:45 → DEN 12:59DL 706	8h 59m	99%	85%
Delta Details →	JFK 08:40 → ATL 11:14DL 2227	1h 36m Atlanta	ATL 12:50 → DEN 14:04DL 957	7h 24m	93%	81%
Delta Details →	JFK 07:15 → DTW 09:25DL 5080 · flown by Endeavor	3h 17m Detroit	DTW 12:42 → DEN 13:54DL 1648	8h 39m	98%	80%
American Details →	JFK 05:59 → CLT 07:57AA 2643	3h 33m Charlotte	CLT 11:30 → DEN 12:56AA 1758	8h 57m	98%	78%
Delta Details →	JFK 06:00 → SLC 09:03DL 892	1h 12m Salt Lake City	SLC 10:15 → DEN 11:53DL 1553	7h 53m	94%	76%
Delta Details →	JFK 13:40 → LAX 16:38DL 747	3h 51m Los Angeles	LAX 20:29 → DEN 23:52DL 1729	12h 13m	98%	75%
Delta Details →	JFK 07:15 → MSP 09:26DL 2390	1h 34m Minneapolis	MSP 11:00 → DEN 12:10DL 2927	6h 55m	91%	74%
Delta Details →	JFK 15:40 → ATL 18:24DL 1480	2h 30m Atlanta	ATL 20:54 → DEN 22:12DL 493	8h 32m	93%	73%
Tight connection: often missed
American Details →	JFK 16:00 → MIA 19:26AA 1479	1h 04m Miami	MIA 20:30 → DEN 22:54AA 1737	8h 53m	71%	46%
American Details →	JFK 14:42 → DFW 17:44AA 1953	46m Dallas-Fort Worth	DFW 18:30 → DEN 19:41AA 2235	6h 59m	55%	24%
American Details →	JFK 15:30 → CLT 17:44AA 1294	48m Charlotte	CLT 18:32 → DEN 20:17AA 1736	6h 47m	41%	19%

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 12m · leaves 06:00 6%

Afternoon and evening

MIA · 1h 04m · leaves 16:00 29%

DFW · 46m · leaves 14:42 45%

CLT · 48m · leaves 15:30 59%

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 763 JFK 06:59 → AUS United UA 1541 AUS 12:55 → DEN Connection details →	2h 47m	9h 15m	93%	88%
JetBlue B6 905 JFK 07:05 → ORD United UA 581 ORD 10:54 → DEN Connection details →	2h 04m	7h 40m	94%	88%
American AA 33 JFK 07:05 → LAX United UA 360 LAX 12:46 → DEN Connection details →	2h 39m	11h 11m	97%	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