Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No nonstop, and no clear pattern: the best connection reaches Dulles on time 4 times in 5.

Best connections, one ticket

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


Delta Details →	DAL 06:05 → ATL 09:15DL 516	3h 02m Atlanta	ATL 12:17 → IAD 14:02DL 2135	6h 57m	98%	80%
Delta Details →	DAL 12:19 → ATL 15:31DL 1115	3h 44m Atlanta	ATL 19:15 → IAD 21:03DL 1309	7h 45m	98%	72%
Delta Details →	DAL 15:59 → ATL 19:14DL 512	3h 39m Atlanta	ATL 22:53 → IAD 00:44 +1DL 2549	7h 45m	97%	70%
Delta Details →	DAL 10:09 → ATL 13:20DL 441	1h 39m Atlanta	ATL 14:59 → IAD 16:47DL 1695	5h 38m	95%	70%
Tight connection: often missed
Delta Details →	DAL 18:40 → ATL 22:00DL 2780	53m Atlanta	ATL 22:53 → IAD 00:44 +1DL 2549	5h 04m	74%	53%

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.

Afternoon and evening

ATL · 53m · leaves 18:40 26%

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 1304 DAL 19:10 → DEN United UA 1924 DEN 23:59 → IAD Connection details →	3h 29m	9h 17m	98%	92%
Southwest WN 3312 DAL 07:00 → MSY United UA 2497 MSY 12:17 → IAD Connection details →	3h 52m	7h 50m	98%	89%
Southwest WN 1379 DAL 06:00 → PHX United UA 1873 PHX 08:50 → IAD Connection details →	2h 22m	9h 17m	100%	88%

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