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

No clear winner: airlines and hours on this route all land within a few points of 78% on time.

Nonstops


United	ATL	IAD	1h 52m	84%	0.8%	1,203	Flying now
Delta	ATL	IAD	1h 45m	79%	2.7%	2,224	Flying now
Frontier	ATL	IAD	1h 57m	64%	1.7%	653	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. Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	ATL 09:18 → DTW 11:10DL 1298	4h 00m Detroit	DTW 15:10 → IAD 16:42DL 1787	7h 24m	100%	83%
American Details →	ATL 06:24 → CLT 07:55AA 5176 · flown by PSA	3h 10m Charlotte	CLT 11:05 → IAD 12:38AA 5220 · flown by PSA	6h 14m	97%	76%
Delta Details →	ATL 15:38 → MSP 17:16DL 2981	2h 39m Minneapolis	MSP 19:55 → IAD 23:25DL 4129 · flown by SkyWest	7h 47m	97%	73%
United Details →	ATL 11:37 → IAH 12:47UA 425	1h 44m Houston	IAH 14:31 → IAD 18:50UA 1478	7h 13m	96%	73%
American Details →	ATL 05:00 → CLT 06:25AA 5507 · flown by PSA	55m Charlotte	CLT 07:20 → IAD 08:50AA 5219 · flown by PSA	3h 49m	85%	73%
Frontier Details →	ATL 05:05 → MCO 06:40F9 1242	3h 55m Orlando	MCO 10:35 → IAD 12:53F9 4230	7h 48m	95%	70%
United Details →	ATL 11:29 → ORD 12:52UA 1239	3h 01m Chicago	ORD 15:53 → IAD 19:02UA 2437	7h 33m	100%	70%
United Details →	ATL 16:25 → EWR 18:54UA 555	2h 56m Newark	EWR 21:50 → IAD 23:19UA 1784	6h 54m	94%	67%
Tight connection: often missed
United Details →	ATL 19:04 → ORD 20:30UA 1046	1h 10m Chicago	ORD 21:40 → IAD 00:45 +1UA 2766	5h 41m	73%	49%
American Details →	ATL 15:06 → CLT 16:36AA 5041 · flown by PSA	1h 34m Charlotte	CLT 18:10 → IAD 19:34AA 1450	4h 34m	69%	34%
American Details →	ATL 16:16 → DFW 17:49AA 1356	55m Dallas-Fort Worth	DFW 18:44 → IAD 22:46AA 1132	6h 36m	41%	19%

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

CLT · 55m · leaves 05:00 15%

Afternoon and evening

IAH · 1h 09m · leaves 15:57 22%

ORD · 1h 10m · leaves 19:04 27%

DFW · 55m · leaves 16:16 59%

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.


Delta DL 1424 ATL 08:58 → MSY United UA 2497 MSY 12:17 → IAD Connection details →	2h 47m	6h 52m	99%	88%
Delta DL 3011 ATL 08:15 → SAV United UA 2057 SAV 12:05 → IAD Connection details →	2h 46m	5h 30m	99%	88%
Delta DL 2650 ATL 10:15 → RIC United UA 4549 RIC 15:00 → IAD Connection details →	3h 04m	5h 50m	99%	87%

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