Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: United’s SYR → DEN flights land within a few points of 3 in 4 on time whatever the hour.

Nonstops (seasonal or thin)


United	SYR	DEN	4h 06m	74%	1.1%	476	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 Syracuse). Layovers up to 4 hours. Pick a connection for the details.


United Details →	SYR 06:15 → ORD 07:29UA 1008	3h 25m Chicago	ORD 10:54 → DEN 12:45UA 581	8h 30m	97%	89%
United Details →	SYR 06:00 → IAD 07:28UA 4860 · flown by CommuteAir	2h 45m Dulles	IAD 10:13 → DEN 12:05UA 1865	8h 05m	90%	84%
Delta Details →	SYR 06:00 → ATL 08:27DL 1108	3h 18m Atlanta	ATL 11:45 → DEN 12:59DL 706	8h 59m	98%	82%
Delta Details →	SYR 09:11 → DTW 10:48DL 4123 · flown by SkyWest	1h 54m Detroit	DTW 12:42 → DEN 13:54DL 1648	6h 43m	96%	81%
American Details →	SYR 06:00 → ORD 07:24AA 4134 · flown by Envoy	2h 36m Chicago	ORD 10:00 → DEN 11:44AA 1744	7h 44m	96%	79%
Delta Details →	SYR 07:32 → MSP 09:11DL 2834	1h 49m Minneapolis	MSP 11:00 → DEN 12:10DL 2927	6h 38m	93%	77%
American Details →	SYR 06:00 → PHL 07:20AA 6095 · flown by Piedmont	2h 15m Philadelphia	PHL 09:35 → DEN 11:56AA 3312	7h 56m	91%	76%
United Details →	SYR 10:30 → IAD 11:55UA 4840 · flown by CommuteAir	2h 40m Dulles	IAD 14:35 → DEN 16:29UA 1126	7h 59m	93%	74%
Tight connection: often missed
United Details →	SYR 17:49 → ORD 19:05UA 1067	55m Chicago	ORD 20:00 → DEN 22:01UA 767	6h 12m	59%	40%

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

CLT · 1h 19m · leaves 08:00 10%

DTW · 53m · leaves 06:11 19%

DFW · 51m · leaves 07:16 20%

Afternoon and evening

DTW · 1h 04m · leaves 13:39 18%

PHL · 1h 10m · leaves 14:59 18%

ORD · 55m · leaves 17:49 41%

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 4134 SYR 06:00 → ORD United UA 581 ORD 10:54 → DEN Connection details →	3h 30m	8h 45m	96%	92%
Delta DL 2834 SYR 07:32 → MSP United UA 2232 MSP 11:34 → DEN Connection details →	2h 23m	7h 13m	93%	87%
Delta DL 1108 SYR 06:00 → ATL United UA 1327 ATL 11:10 → DEN Connection details →	2h 43m	8h 28m	97%	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