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 3% of the time at 12 pm and 36% of the time at 8 pm.

Nonstops


United	DEN	PIT	3h 06m	81%	0.5%	850	Flying now
Southwest	DEN	PIT	3h 00m	66%	0.3%	766	Flying now
Frontier	DEN	PIT	3h 07m	98%	0.0%	41	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	DEN 23:55 → MCO 05:40WN 1597	1h 50m Orlando	MCO 07:30 → PIT 09:50 +1WN 4309	7h 55m	100%	94%
United Details →	DEN 06:04 → LAX 07:34UA 1093	1h 26m Los Angeles	LAX 09:00 → PIT 16:51UA 2039	8h 47m	99%	91%
Delta Details →	DEN 00:40 → ATL 05:42DL 302	3h 21m Atlanta	ATL 09:03 → PIT 10:45DL 1363	8h 04m	100%	90%
American Details →	DEN 23:59 → CLT 05:13AA 3156	2h 52m Charlotte	CLT 08:05 → PIT 09:30 +1AA 2310	7h 31m	100%	89%
United Details →	DEN 05:15 → SFO 06:53UA 2367	1h 30m San Francisco	SFO 08:23 → PIT 16:27UA 2836	9h 12m	98%	88%
Delta Details →	DEN 00:59 → DTW 05:48DL 1096	2h 42m Detroit	DTW 08:30 → PIT 09:47DL 5606 · flown by Republic	6h 49m	97%	88%
United Details →	DEN 23:59 → IAD 05:27UA 1924	3h 03m Dulles	IAD 08:30 → PIT 09:40 +1UA 6119 · flown by Mesa	7h 41m	100%	87%
United Details →	DEN 06:00 → ORD 09:42UA 1377	2h 58m Chicago	ORD 12:40 → PIT 15:23UA 3432 · flown by Republic	7h 23m	99%	86%
Tight connection: often missed
United Details →	DEN 13:25 → ORD 17:05UA 617	1h 00m Chicago	ORD 18:05 → PIT 20:51UA 1946	5h 26m	68%	42%
Delta Details →	DEN 16:05 → MSP 19:15DL 2271	50m Minneapolis	MSP 20:05 → PIT 23:10DL 3075	5h 05m	63%	41%
American Details →	DEN 12:34 → ORD 16:31AA 1744	48m Chicago	ORD 17:19 → PIT 19:57AA 2296	5h 24m	70%	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 16m · leaves 06:00 3%

IAD · 1h 15m · leaves 06:13 6%

LAS · 1h 10m · leaves 11:00 10%

Afternoon and evening

CLT · 1h 20m · leaves 15:57 36%

ORD · 1h 06m · leaves 16:29 36%

MSP · 50m · leaves 16:05 37%

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.


United UA 2656 DEN 23:59 → BOS Delta DL 5678 BOS 08:15 → PIT Connection details →	2h 17m	8h 19m	99%	88%
Frontier F9 3219 DEN 06:00 → SLC Delta DL 1188 SLC 10:45 → PIT Connection details →	3h 14m	8h 30m	98%	85%
Frontier F9 3294 DEN 06:30 → ATL Delta DL 1568 ATL 15:29 → PIT Connection details →	3h 51m	8h 45m	99%	82%

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