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 8 am and almost half the time at 7 pm.

Nonstops (seasonal or thin)


United	IAD	MIA	3h 01m	87%	0.6%	512	Flying now
Frontier	IAD	MIA	2h 52m	69%	1.8%	113	Not flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Miami on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


American Details →	IAD 06:33 → CLT 08:00AA 1216	3h 01m Charlotte	CLT 11:01 → MIA 13:11AA 969	6h 37m	97%	83%
United + Americantwo ticketsDetails →	IAD 08:29 → EWR 09:55UA 2396	2h 25m Newark	EWR 12:20 → MIA 15:29AA 1822	7h 00m	98%	80%
Delta Details →	IAD 06:00 → ATL 07:46DL 2127	3h 14m Atlanta	ATL 11:00 → MIA 13:04DL 1332	7h 04m	98%	78%
United + Americantwo ticketsDetails →	IAD 06:10 → ORD 07:27UA 2070	2h 37m Chicago	ORD 10:04 → MIA 14:16AA 1474	8h 07m	95%	78%
United + Americantwo ticketsDetails →	IAD 08:35 → BOS 10:20UA 641	3h 22m Boston	BOS 13:42 → MIA 17:22AA 1589	8h 42m	100%	77%
American Details →	IAD 05:03 → CLT 06:35AA 5054 · flown by PSA	2h 50m Charlotte	CLT 09:25 → MIA 11:37AA 1436	6h 34m	94%	76%
Delta Details →	IAD 06:00 → MSP 07:55DL 3996 · flown by SkyWest	1h 00m Minneapolis	MSP 08:55 → MIA 13:37DL 2129	7h 37m	91%	76%
United Details →	IAD 06:33 → EWR 07:52UA 2147	3h 39m Newark	EWR 11:31 → MIA 14:38UA 2295	8h 05m	100%	76%
Tight connection: often missed
Delta Details →	IAD 12:29 → JFK 13:58DL 5835 · flown by Republic	1h 16m New York	JFK 15:14 → MIA 18:54DL 2500	6h 25m	61%	38%
United Details →	IAD 17:42 → EWR 19:10UA 1831	54m Newark	EWR 20:04 → MIA 23:22UA 1128	5h 40m	50%	34%
Delta Details →	IAD 15:02 → ATL 16:54DL 2135	51m Atlanta	ATL 17:45 → MIA 19:56DL 1631	4h 54m	68%	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 09m · leaves 06:00 8%

MSP · 1h 00m · leaves 06:00 9%

IAH · 1h 01m · leaves 08:40 11%

Afternoon and evening

ATL · 51m · leaves 15:02 32%

EWR · 54m · leaves 17:42 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.

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