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, any airlines

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.


Southwest + Unitedtwo ticketsDetails →	MCI 06:50 → AUS 08:40WN 2528	3h 20m Austin	AUS 12:00 → IAD 16:19UA 2344	8h 29m	100%	89%
United Details →	MCI 06:00 → DEN 06:56UA 355	1h 04m Denver	DEN 08:00 → IAD 13:26UA 1101	6h 26m	97%	88%
American + Unitedtwo ticketsDetails →	MCI 05:30 → ORD 07:31AA 3845 · flown by Envoy	3h 36m Chicago	ORD 11:07 → IAD 14:12UA 1869	7h 42m	97%	86%
Southwest + Unitedtwo ticketsDetails →	MCI 12:20 → AUS 14:10WN 2529	2h 50m Austin	AUS 17:00 → IAD 21:19UA 376	7h 59m	100%	86%
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%
Southwest + Unitedtwo ticketsDetails →	MCI 08:30 → DEN 09:18WN 3169	3h 08m Denver	DEN 12:26 → IAD 17:58UA 2853	8h 28m	100%	82%
Southwest + Unitedtwo ticketsDetails →	MCI 13:30 → IND 16:00WN 1432	3h 42m Indianapolis	IND 19:42 → IAD 21:30UA 3445 · flown by Republic	7h 00m	100%	80%
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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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