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 1 time in 10 at 11 am and 35% of the time at 7 pm.

Nonstops


United	DEN	JAX	3h 27m	82%	0.0%	638	Flying now
Southwest	DEN	JAX	3h 10m	70%	0.0%	382	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


American Details →	DEN 23:45 → MIA 05:41AA 1737	2h 21m Miami	MIA 08:02 → JAX 09:27 +1AA 3609 · flown by Envoy	7h 42m	97%	94%
Southwest Details →	DEN 05:00 → AUS 08:05WN 411	2h 35m Austin	AUS 10:40 → JAX 14:10WN 320	7h 10m	100%	88%
United Details →	DEN 23:59 → IAD 05:27UA 1924	3h 05m Dulles	IAD 08:32 → JAX 10:42 +1UA 2084	8h 43m	100%	88%
Delta Details →	DEN 00:40 → ATL 05:42DL 302	3h 48m Atlanta	ATL 09:30 → JAX 10:43DL 2356	8h 03m	100%	86%
Southwest Details →	DEN 23:50 → BWI 05:15WN 1501	3h 00m Baltimore	BWI 08:15 → JAX 10:20 +1WN 969	8h 30m	100%	86%
American Details →	DEN 23:59 → CLT 05:13AA 3156	1h 54m Charlotte	CLT 07:07 → JAX 08:32 +1AA 1989	6h 33m	96%	84%
Delta Details →	DEN 00:59 → DTW 05:48DL 1096	2h 41m Detroit	DTW 08:29 → JAX 10:49DL 2333	7h 50m	97%	83%
Delta Details →	DEN 06:00 → MSP 08:59DL 1129	3h 58m Minneapolis	MSP 12:57 → JAX 16:54DL 2392	8h 52m	99%	82%
Tight connection: often missed
United Details →	DEN 15:35 → IAH 19:10UA 489	50m Houston	IAH 20:00 → JAX 23:20UA 2293	5h 45m	65%	49%
American Details →	DEN 09:08 → ORD 12:56AA 1747	50m Chicago	ORD 13:46 → JAX 17:18AA 3317	6h 10m	72%	46%
American Details →	DEN 14:22 → ORD 18:16AA 1760	1h 13m Chicago	ORD 19:29 → JAX 22:57AA 2096	6h 43m	67%	32%

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

EWR · 1h 12m · leaves 06:00 3%

IAH · 55m · leaves 07:42 10%

ORD · 1h 00m · leaves 06:00 11%

Afternoon and evening

IAH · 50m · leaves 15:35 35%

MDW · 1h 00m · leaves 15:00 39%

CLT · 1h 06m · leaves 15:57 40%

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.


Frontier F9 1280 DEN 23:40 → MIA American AA 3609 MIA 08:02 → JAX Connection details →	2h 11m	7h 47m	89%	86%
Southwest WN 411 DEN 05:00 → AUS Delta DL 3772 AUS 10:11 → JAX Connection details →	2h 06m	6h 57m	100%	86%
United UA 1214 DEN 23:59 → PHL American AA 2916 PHL 08:30 → JAX Connection details →	2h 59m	8h 56m	97%	86%

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