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 8% of the time at 11 am and 37% of the time at 5 pm.

Nonstops


Frontier	DEN	GRR	2h 34m	89%	0.0%	148	Flying now
United	DEN	GRR	2h 35m	79%	0.1%	728	Flying now
Southwest	DEN	GRR	2h 25m	69%	0.3%	359	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	DEN 10:25 → DTW 15:20DL 2787	2h 40m Detroit	DTW 18:00 → GRR 19:01DL 5800 · flown by Republic	6h 36m	98%	91%
Southwest Details →	DEN 05:55 → MDW 09:20WN 1598	55m Chicago	MDW 10:15 → GRR 12:05WN 2779	4h 10m	94%	84%
American Details →	DEN 07:05 → ORD 10:45AA 2771	1h 11m Chicago	ORD 11:56 → GRR 14:05AA 3553 · flown by Envoy	5h 00m	91%	81%
Delta Details →	DEN 07:15 → ATL 12:12DL 431	3h 07m Atlanta	ATL 15:19 → GRR 17:14DL 2058	8h 00m	99%	81%
United Details →	DEN 06:00 → EWR 11:49UA 2345	2h 03m Newark	EWR 13:52 → GRR 16:03UA 3419 · flown by Republic	8h 03m	99%	79%
Delta Details →	DEN 14:15 → ATL 19:20DL 706	2h 39m Atlanta	ATL 21:59 → GRR 23:54DL 2865	7h 40m	97%	77%
Delta Details →	DEN 09:19 → MSP 12:15DL 1675	3h 47m Minneapolis	MSP 16:02 → GRR 18:28DL 1555	7h 09m	98%	77%
United Details →	DEN 06:00 → ORD 09:42UA 1377	2h 58m Chicago	ORD 12:40 → GRR 14:55UA 4598 · flown by GoJet	6h 55m	99%	76%
Tight connection: often missed
United Details →	DEN 12:40 → EWR 18:35UA 1283	55m Newark	EWR 19:30 → GRR 21:50UA 3580 · flown by Republic	7h 10m	66%	48%
American Details →	DEN 15:57 → CLT 21:27AA 1735	1h 01m Charlotte	CLT 22:28 → GRR 00:21 +1AA 3113	6h 23m	55%	35%
American Details →	DEN 15:13 → PHL 20:59AA 1759	51m Philadelphia	PHL 21:50 → GRR 23:58AA 5493 · flown by PSA	6h 45m	54%	34%

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

MDW · 55m · leaves 05:55 6%

IAH · 1h 00m · leaves 07:42 8%

ORD · 1h 11m · leaves 07:05 9%

Afternoon and evening

ORD · 57m · leaves 13:25 37%

CLT · 1h 01m · leaves 15:57 45%

PHL · 51m · leaves 15:13 46%

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 1915 DEN 09:35 → DTW Delta DL 5800 DTW 18:00 → GRR Connection details →	3h 33m	7h 26m	100%	93%
United UA 1377 DEN 06:00 → ORD American AA 3553 ORD 11:56 → GRR Connection details →	2h 14m	6h 05m	95%	85%
Southwest WN 1526 DEN 12:20 → DTW Delta DL 4081 DTW 20:00 → GRR Connection details →	2h 55m	6h 40m	100%	80%

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