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 6% of the time at 12 pm and 27% of the time at 5 pm.

Nonstops (seasonal or thin)


United	DEN	BDL	3h 49m	81%	0.8%	727	Flying now
Southwest	DEN	BDL	3h 30m	57%	3.7%	163	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	DEN 23:50 → BWI 05:15WN 1501	1h 30m Baltimore	BWI 06:45 → BDL 08:05 +1WN 869	6h 15m	97%	93%
American Details →	DEN 23:59 → CLT 05:13AA 3156	2h 17m Charlotte	CLT 07:30 → BDL 09:28 +1AA 1449	7h 29m	97%	90%
Delta Details →	DEN 00:40 → ATL 05:42DL 302	2h 33m Atlanta	ATL 08:15 → BDL 10:34DL 2951	7h 54m	99%	88%
Delta Details →	DEN 00:59 → DTW 05:48DL 1096	1h 17m Detroit	DTW 07:05 → BDL 08:48DL 2859	5h 49m	94%	86%
United Details →	DEN 06:13 → IAD 11:41UA 1279	59m Dulles	IAD 12:40 → BDL 14:06UA 632	5h 53m	94%	84%
Delta Details →	DEN 06:05 → DTW 10:57DL 1745	3h 30m Detroit	DTW 14:27 → BDL 16:13DL 2814	8h 08m	98%	83%
American Details →	DEN 23:55 → PHL 05:32AA 2500	3h 28m Philadelphia	PHL 09:00 → BDL 10:22 +1AA 5997 · flown by Piedmont	8h 27m	93%	82%
United Details →	DEN 13:53 → IAD 19:22UA 347	3h 03m Dulles	IAD 22:25 → BDL 23:59UA 444	8h 06m	98%	80%
Tight connection: often missed
Southwest Details →	DEN 10:55 → BWI 16:20WN 4434	50m Baltimore	BWI 17:10 → BDL 18:30WN 428	5h 35m	75%	45%
United Details →	DEN 13:25 → ORD 17:05UA 617	1h 05m Chicago	ORD 18:10 → BDL 21:33UA 516	6h 08m	73%	36%
American Details →	DEN 14:22 → ORD 18:16AA 1760	48m Chicago	ORD 19:04 → BDL 22:26AA 1453	6h 04m	50%	30%

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

DTW · 1h 17m · leaves 00:59 6%

IAD · 59m · leaves 06:13 6%

Afternoon and evening

IAD · 1h 14m · leaves 15:40 20%

BWI · 50m · leaves 10:55 25%

ORD · 48m · leaves 14:22 50%

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.


Southwest WN 4854 DEN 05:00 → MCO JetBlue B6 2938 MCO 12:45 → BDL Connection details →	2h 05m	8h 40m	100%	93%
United UA 1214 DEN 23:59 → PHL American AA 5997 PHL 09:00 → BDL Connection details →	3h 29m	8h 23m	98%	90%
Frontier F9 1450 DEN 23:46 → ATL Delta DL 2951 ATL 08:15 → BDL Connection details →	3h 13m	8h 48m	96%	84%

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