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 1 time in 10 at 8 am and almost half the time at 6 pm.

Nonstops


Delta	ORD	ATL	2h 06m	81%	2.5%	2,628	Flying now
United	ORD	ATL	2h 11m	76%	1.4%	1,684	Flying now
American	ORD	ATL	2h 06m	70%	2.7%	1,370	Flying now
Frontier	ORD	ATL	2h 22m	69%	3.5%	715	Flying now
Spirit	ORD	ATL	1h 59m	78%	0.0%	45	Not 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 (Atlanta is 1 h ahead of Chicago). Layovers up to 4 hours. Pick a connection for the details.


United Details →	ORD 06:30 → IAD 09:24UA 1689	3h 11m Dulles	IAD 12:35 → ATL 14:34UA 471	7h 04m	100%	84%
United Details →	ORD 06:00 → DEN 07:42UA 2806	2h 18m Denver	DEN 10:00 → ATL 15:10UA 2424	8h 10m	100%	83%
American Details →	ORD 05:00 → PHL 08:05AA 2970	1h 27m Philadelphia	PHL 09:32 → ATL 11:53AA 4338 · flown by Republic	5h 53m	92%	83%
Delta Details →	ORD 06:05 → JFK 09:26DL 5741 · flown by Republic	3h 44m New York	JFK 13:10 → ATL 15:45DL 2342	8h 40m	96%	83%
Delta Details →	ORD 06:30 → MSP 08:06DL 1717	2h 34m Minneapolis	MSP 10:40 → ATL 14:05DL 1046	6h 35m	96%	81%
United Details →	ORD 06:29 → IAH 09:18UA 1799	2h 37m Houston	IAH 11:55 → ATL 15:16UA 4079 · flown by Mesa	7h 47m	100%	79%
American Details →	ORD 06:00 → LGA 09:16AA 327	2h 35m New York	LGA 11:51 → ATL 14:28AA 4605 · flown by Republic	7h 26m	98%	78%
American Details →	ORD 05:07 → CLT 08:10AA 2842	1h 00m Charlotte	CLT 09:10 → ATL 10:41AA 5039 · flown by PSA	4h 34m	90%	77%
Tight connection: often missed
American Details →	ORD 14:24 → MIA 18:39AA 3148	1h 25m Miami	MIA 20:04 → ATL 22:09AA 1045	6h 45m	74%	42%
American Details →	ORD 16:05 → MIA 20:26AA 2910	1h 30m Miami	MIA 21:56 → ATL 23:59AA 659	6h 54m	60%	37%
American Details →	ORD 15:50 → DFW 18:28AA 2754	58m Dallas-Fort Worth	DFW 19:26 → ATL 22:36AA 3212	5h 45m	61%	33%

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

IAH · 1h 19m · leaves 07:35 5%

DEN · 1h 05m · leaves 07:05 6%

CLT · 1h 00m · leaves 05:07 10%

Afternoon and evening

DCA · 58m · leaves 13:20 42%

PHL · 46m · leaves 13:32 45%

MSP · 55m · leaves 15:55 46%

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 5581 ORD 05:59 → MKE Delta DL 2999 MKE 10:11 → ATL Connection details →	3h 11m	6h 15m	97%	89%
United UA 5703 ORD 06:59 → SDF Delta DL 1481 SDF 13:02 → ATL Connection details →	3h 36m	6h 33m	100%	89%
American AA 4439 ORD 06:45 → IND Delta DL 2952 IND 11:23 → ATL Connection details →	2h 22m	5h 15m	96%	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