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 4 in 5 on time.

Nonstops


United	IAD	ATL	2h 01m	81%	0.7%	1,202	Flying now
Delta	IAD	ATL	1h 58m	81%	2.8%	2,224	Flying now
Frontier	IAD	ATL	2h 16m	70%	2.1%	652	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	IAD 06:10 → ORD 07:27UA 2070	3h 02m Chicago	ORD 10:29 → ATL 13:44UA 2684	7h 34m	100%	86%
Delta Details →	IAD 06:00 → DTW 07:40DL 3826 · flown by SkyWest	2h 45m Detroit	DTW 10:25 → ATL 12:25DL 2856	6h 23m	96%	83%
Delta Details →	IAD 06:00 → MSP 07:55DL 3996 · flown by SkyWest	2h 45m Minneapolis	MSP 10:40 → ATL 14:05DL 1046	8h 05m	96%	79%
Delta Details →	IAD 11:10 → DTW 12:44DL 2884	2h 13m Detroit	DTW 14:57 → ATL 17:05DL 1983	5h 55m	100%	78%
Delta Details →	IAD 11:44 → MSP 13:39DL 3699 · flown by SkyWest	2h 30m Minneapolis	MSP 16:09 → ATL 19:46DL 1028	8h 02m	96%	77%
American Details →	IAD 05:03 → CLT 06:35AA 5054 · flown by PSA	2h 35m Charlotte	CLT 09:10 → ATL 10:41AA 5039 · flown by PSA	5h 38m	94%	76%
United Details →	IAD 06:33 → EWR 07:52UA 2147	3h 08m Newark	EWR 11:00 → ATL 13:23UA 642	6h 50m	100%	73%
United Details →	IAD 10:31 → ORD 11:53UA 1252	2h 02m Chicago	ORD 13:55 → ATL 17:10UA 356	6h 39m	98%	71%
Tight connection: often missed
United Details →	IAD 17:42 → ORD 18:50UA 2497	1h 19m Chicago	ORD 20:09 → ATL 23:30UA 2770	5h 48m	71%	47%
United Details →	IAD 15:39 → ORD 17:02UA 1393	1h 18m Chicago	ORD 18:20 → ATL 21:41UA 1398	6h 02m	72%	40%
Frontier Details →	IAD 17:47 → FLL 20:34F9 2959	1h 13m Fort Lauderdale	FLL 21:47 → ATL 23:24F9 3013	6h 12m	62%	27%

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

EWR · 1h 05m · leaves 08:29 10%

IAH · 56m · leaves 08:40 13%

CLT · 1h 10m · leaves 06:33 13%

Afternoon and evening

MCO · 1h 19m · leaves 13:38 19%

ORD · 1h 19m · leaves 17:42 29%

FLL · 1h 13m · leaves 17:47 38%

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.


United UA 1108 IAD 08:25 → CHS Delta DL 3107 CHS 13:05 → ATL Connection details →	2h 54m	5h 55m	100%	89%
United UA 6119 IAD 08:30 → PIT Southwest WN 3359 PIT 12:25 → ATL Connection details →	2h 45m	5h 40m	96%	89%
United UA 4236 IAD 08:15 → MYR Delta DL 3182 MYR 13:54 → ATL Connection details →	3h 55m	7h 05m	100%	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