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, any airlines

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.


American + Unitedtwo ticketsDetails →	SYR 06:00 → ORD 07:24AA 4134 · flown by Envoy	3h 30m Chicago	ORD 10:54 → DEN 12:45UA 581	8h 45m	96%	92%
Delta + Unitedtwo ticketsDetails →	SYR 07:32 → MSP 09:11DL 2834	2h 23m Minneapolis	MSP 11:34 → DEN 12:45UA 2232	7h 13m	93%	87%
Delta + Unitedtwo ticketsDetails →	SYR 06:00 → ATL 08:27DL 1108	2h 43m Atlanta	ATL 11:10 → DEN 12:28UA 1327	8h 28m	97%	85%
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%
American + Unitedtwo ticketsDetails →	SYR 10:36 → BOS 11:55AA 4635 · flown by Republic	3h 15m Boston	BOS 15:10 → DEN 17:55UA 2297	9h 19m	99%	84%
Delta + Unitedtwo ticketsDetails →	SYR 06:00 → LGA 07:14DL 5355 · flown by Endeavor	2h 46m New York	LGA 10:00 → DEN 12:20UA 716	8h 20m	93%	83%
Delta + Frontiertwo ticketsDetails →	SYR 09:11 → DTW 10:48DL 4123 · flown by SkyWest	2h 31m Detroit	DTW 13:19 → DEN 14:35F9 3565	7h 24m	96%	82%
United Details →	SYR 06:15 → ORD 07:29UA 1008	1h 11m Chicago	ORD 08:40 → DEN 10:31UA 526	6h 16m	95%	81%
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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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