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 5% of the time at 8 am and 23% of the time at 9 pm.

Nonstops


United	JAX	DEN	4h 00m	88%	0.3%	638	Flying now
Southwest	JAX	DEN	3h 50m	74%	0.3%	382	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 Jacksonville). Layovers up to 4 hours. Pick a connection for the details.


United Details →	JAX 07:20 → ORD 09:12UA 1733	1h 42m Chicago	ORD 10:54 → DEN 12:45UA 581	7h 25m	97%	93%
American Details →	JAX 06:00 → MIA 07:23AA 2711	1h 34m Miami	MIA 08:57 → DEN 11:19AA 1739	7h 19m	95%	90%
Delta Details →	JAX 08:20 → ATL 09:36DL 2569	3h 14m Atlanta	ATL 12:50 → DEN 14:04DL 957	7h 44m	99%	87%
United Details →	JAX 09:20 → IAD 11:16UA 1434	1h 32m Dulles	IAD 12:48 → DEN 14:42UA 1587	7h 22m	96%	87%
United Details →	JAX 06:24 → EWR 08:48UA 2673	3h 07m Newark	EWR 11:55 → DEN 14:13UA 1999	9h 49m	100%	85%
Delta Details →	JAX 07:00 → ATL 08:15DL 2450	3h 30m Atlanta	ATL 11:45 → DEN 12:59DL 706	7h 59m	99%	83%
Delta Details →	JAX 05:30 → ATL 06:42DL 2722	3h 08m Atlanta	ATL 09:50 → DEN 11:07DL 995	7h 37m	99%	82%
United Details →	JAX 09:35 → EWR 11:59UA 1144	1h 31m Newark	EWR 13:30 → DEN 15:53UA 577	8h 18m	94%	81%
Tight connection: often missed
American Details →	JAX 16:35 → PHL 18:54AA 5248 · flown by PSA	1h 16m Philadelphia	PHL 20:10 → DEN 22:33AA 2500	7h 57m	61%	33%
Southwest Details →	JAX 19:02 → MDW 20:30WN 2164	55m Chicago	MDW 21:25 → DEN 23:05WN 2770	6h 08m	55%	29%
American Details →	JAX 19:40 → DFW 21:25AA 1980	1h 20m Dallas-Fort Worth	DFW 22:45 → DEN 23:55AA 662	6h 15m	58%	23%

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

BNA · 1h 05m · leaves 06:20 2%

EWR · 1h 12m · leaves 06:24 3%

IAH · 1h 03m · leaves 07:05 5%

Afternoon and evening

PHL · 1h 16m · leaves 16:35 39%

DFW · 1h 20m · leaves 19:40 42%

MDW · 55m · leaves 19:02 45%

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 2155 JAX 06:20 → BNA United UA 502 BNA 10:26 → DEN Connection details →	3h 36m	8h 03m	100%	92%
Delta DL 2450 JAX 07:00 → ATL United UA 1327 ATL 11:10 → DEN Connection details →	2h 55m	7h 28m	99%	87%
Delta DL 5632 JAX 06:45 → BOS United UA 414 BOS 12:22 → DEN Connection details →	2h 46m	10h 08m	96%	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