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 3 in 4 on time.

Nonstops


United	ORD	PIT	1h 41m	78%	2.1%	2,167	Flying now
American	ORD	PIT	1h 39m	72%	2.5%	1,854	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Pittsburgh on time. Total trip = scheduled departure to arrival, layover included (Pittsburgh 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 32m Dulles	IAD 12:56 → PIT 14:03UA 2066	6h 33m	100%	87%
Delta Details →	ORD 05:30 → ATL 08:33DL 1264	2h 27m Atlanta	ATL 11:00 → PIT 12:42DL 1345	6h 12m	98%	82%
Delta Details →	ORD 09:45 → ATL 12:51DL 1178	2h 38m Atlanta	ATL 15:29 → PIT 17:15DL 1568	6h 30m	99%	80%
United Details →	ORD 07:35 → IAH 10:36UA 1231	1h 24m Houston	IAH 12:00 → PIT 15:56UA 315	7h 21m	96%	80%
United Details →	ORD 07:05 → DEN 08:55UA 1217	1h 10m Denver	DEN 10:05 → PIT 15:16UA 1308	7h 11m	94%	80%
American Details →	ORD 06:59 → LGA 10:15AA 2723	3h 14m New York	LGA 13:29 → PIT 15:04AA 4479 · flown by Republic	7h 05m	98%	79%
Delta Details →	ORD 08:05 → ATL 11:08DL 2426	2h 59m Atlanta	ATL 14:07 → PIT 15:50DL 1353	6h 44m	98%	78%
Delta Details →	ORD 06:00 → LGA 09:09DL 2767	1h 29m New York	LGA 10:38 → PIT 12:20DL 5694 · flown by Republic	5h 20m	97%	78%
Tight connection: often missed
American Details →	ORD 07:00 → DFW 09:35AA 1902	58m Dallas-Fort Worth	DFW 10:33 → PIT 14:19AA 2311	6h 19m	74%	52%
United Details →	ORD 18:12 → IAD 21:22UA 2202	1h 08m Dulles	IAD 22:30 → PIT 23:36UA 3540 · flown by Republic	4h 24m	67%	51%
American Details →	ORD 13:25 → DFW 15:59AA 1120	1h 56m Dallas-Fort Worth	DFW 17:55 → PIT 21:48AA 680	7h 23m	74%	40%

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

DEN · 1h 10m · leaves 07:05 6%

IAD · 1h 04m · leaves 08:40 7%

ATL · 1h 19m · leaves 06:35 7%

Afternoon and evening

PHL · 51m · leaves 13:32 38%

CLT · 48m · leaves 18:47 47%

LGA · 49m · leaves 14:30 52%

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 1186 ORD 06:05 → BOS Delta DL 5731 BOS 11:45 → PIT Connection details →	2h 16m	6h 35m	98%	89%
United UA 425 ORD 07:12 → ATL Delta DL 1353 ATL 14:07 → PIT Connection details →	3h 40m	7h 37m	100%	85%
Delta DL 1247 ORD 06:35 → ATL Southwest WN 236 ATL 13:10 → PIT Connection details →	3h 29m	7h 15m	98%	82%

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