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 90-minute layover misses 7% of the time at 11 am and 27% of the time at 9 pm.

Nonstops


United	DTW	DEN	3h 15m	84%	0.6%	727	Flying now
Frontier	DTW	DEN	3h 16m	84%	0.2%	473	Flying now
Delta	DTW	DEN	3h 13m	80%	0.2%	1,246	Flying now
Southwest	DTW	DEN	3h 10m	76%	0.6%	649	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 Detroit). Layovers up to 4 hours. Pick a connection for the details.


United Details →	DTW 07:05 → ORD 07:42UA 5553 · flown by SkyWest	3h 12m Chicago	ORD 10:54 → DEN 12:45UA 581	7h 40m	97%	95%
Southwest Details →	DTW 07:00 → STL 07:35WN 1783	1h 07m St Louis	STL 08:42 → DEN 10:02WN 3910	5h 02m	98%	88%
Delta Details →	DTW 07:25 → ATL 09:26DL 965	3h 24m Atlanta	ATL 12:50 → DEN 14:04DL 957	8h 39m	98%	87%
United Details →	DTW 06:00 → IAD 07:34UA 4058 · flown by Mesa	2h 39m Dulles	IAD 10:13 → DEN 12:05UA 1865	8h 05m	92%	86%
United Details →	DTW 05:30 → ORD 05:53UA 3483 · flown by Republic	2h 47m Chicago	ORD 08:40 → DEN 10:31UA 526	7h 01m	100%	86%
United Details →	DTW 06:15 → IAH 08:11UA 1229	1h 21m Houston	IAH 09:32 → DEN 11:08UA 1450	6h 53m	100%	85%
Delta Details →	DTW 06:17 → ATL 08:12DL 1611	3h 33m Atlanta	ATL 11:45 → DEN 12:59DL 706	8h 42m	99%	85%
Southwest Details →	DTW 05:50 → BWI 07:20WN 4534	2h 20m Baltimore	BWI 09:40 → DEN 11:25WN 275	7h 35m	100%	84%
Tight connection: often missed
United Details →	DTW 17:29 → SFO 19:40UA 1863	1h 20m San Francisco	SFO 21:00 → DEN 00:47 +1UA 301	9h 18m	67%	57%
United Details →	DTW 18:20 → ORD 18:57UA 5264 · flown by SkyWest	1h 03m Chicago	ORD 20:00 → DEN 22:01UA 767	5h 41m	72%	46%
Southwest Details →	DTW 20:25 → MDW 20:35WN 1782	50m Chicago	MDW 21:25 → DEN 23:05WN 2770	4h 45m	21%	12%

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

STL · 1h 07m · leaves 07:00 2%

IAD · 58m · leaves 10:13 9%

ATL · 1h 20m · leaves 08:25 11%

Afternoon and evening

SFO · 1h 20m · leaves 17:29 33%

DFW · 1h 01m · leaves 19:51 52%

MDW · 50m · leaves 20:25 79%

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.


Delta DL 4456 DTW 07:30 → ORD United UA 581 ORD 10:54 → DEN Connection details →	2h 55m	7h 15m	97%	95%
Delta DL 1746 DTW 07:01 → MSP United UA 2232 MSP 11:34 → DEN Connection details →	3h 39m	7h 44m	98%	92%
Delta DL 698 DTW 08:25 → SLC United UA 4720 SLC 13:05 → DEN Connection details →	2h 42m	8h 26m	98%	89%

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