Sun, Oct 4 has passed, so this is the 12-month record.

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 3% of the time at 9 am and 1 time in 5 at 9 pm.

Nonstops (seasonal or thin)


United	MCI	IAD	2h 34m	89%	1.3%	715	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Dulles on time. Total trip = scheduled departure to arrival, layover included (Dulles is 1 h ahead of Kansas City). Layovers up to 4 hours. Pick a connection for the details.


United Details →	MCI 06:00 → DEN 06:56UA 355	1h 04m Denver	DEN 08:00 → IAD 13:26UA 1101	6h 26m	97%	88%
United Details →	MCI 06:00 → ORD 07:58UA 5485 · flown by SkyWest	3h 09m Chicago	ORD 11:07 → IAD 14:12UA 1869	7h 12m	98%	85%
United Details →	MCI 11:33 → DEN 12:38UA 5358 · flown by SkyWest	1h 15m Denver	DEN 13:53 → IAD 19:22UA 347	6h 49m	97%	84%
Delta Details →	MCI 05:38 → ATL 08:44DL 1204	3h 33m Atlanta	ATL 12:17 → IAD 14:02DL 2135	7h 24m	100%	83%
United Details →	MCI 09:10 → DEN 10:17UA 280	2h 09m Denver	DEN 12:26 → IAD 17:58UA 2853	7h 48m	99%	81%
Delta Details →	MCI 09:13 → MSP 10:50DL 4867 · flown by Endeavor	3h 40m Minneapolis	MSP 14:30 → IAD 18:04DL 3783 · flown by SkyWest	7h 51m	100%	79%
Delta Details →	MCI 10:33 → DTW 13:30DL 2826	1h 40m Detroit	DTW 15:10 → IAD 16:42DL 1787	5h 09m	95%	79%
United Details →	MCI 08:30 → IAH 10:38UA 2228	1h 35m Houston	IAH 12:13 → IAD 16:30UA 2366	7h 00m	96%	78%
Tight connection: often missed
United Details →	MCI 13:03 → ORD 14:55UA 5309 · flown by SkyWest	58m Chicago	ORD 15:53 → IAD 19:02UA 2437	4h 59m	75%	51%
United Details →	MCI 17:24 → DEN 18:25UA 2123	48m Denver	DEN 19:13 → IAD 00:45 +1UA 1412	6h 21m	47%	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

ATL · 1h 06m · leaves 05:38 3%

DEN · 1h 04m · leaves 06:00 3%

CLT · 1h 05m · leaves 06:31 6%

Afternoon and evening

SLC · 52m · leaves 14:55 20%

ORD · 1h 07m · leaves 18:41 21%

DEN · 48m · leaves 17:24 53%

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 2528 MCI 06:50 → AUS United UA 2344 AUS 12:00 → IAD Connection details →	3h 20m	8h 29m	100%	89%
American AA 3845 MCI 05:30 → ORD United UA 1869 ORD 11:07 → IAD Connection details →	3h 36m	7h 42m	97%	86%
Southwest WN 2529 MCI 12:20 → AUS United UA 376 AUS 17:00 → IAD Connection details →	2h 50m	7h 59m	100%	86%

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