The airlines you fly without knowing it

You book American. You board an aircraft painted as American. The crew wear American uniforms. The flight is operated by a separate company with its own certificate, its own pilots and its own operational record, and that company is who the Department of Transportation holds accountable for the on-time filing.

This is not a loophole. It is how a large share of US domestic flying works, and it explains why carriers you have never heard of appear in the tables on this site.

How the arrangement works

Under a capacity purchase agreement, a mainline carrier buys an entire aircraft's flying for a period. The mainline sets the schedule, sells the seats, sets the fares and takes the revenue. The regional supplies the aircraft, the crew and the operation, and is paid a fee.

The passenger sees one brand. The DOT sees two companies, and requires the operating one to file the record. That is why SkyWest Airlines, Republic Airways, Envoy Air and others appear here with their own pages, their own grades and their own figures.

Since a rule change extended the reporting requirement, mainline carriers must also report their partners' flights, which closed a real gap: a flight sold as a mainline product but operated by a regional used to be able to vanish from the mainline's published numbers entirely.

Why their records differ

Regionals fly a different kind of route with a different kind of aircraft, and both work against them.

Smaller jets on shorter sectors have less scheduled block time in absolute minutes, so a late departure cannot be recovered in the air. Regional flying concentrates on spoke stations where the mainline has three gates rather than thirty, with no spare aircraft, no reserve crews and no maintenance base. When something breaks there, the options are thin.

The result is visible in the figures. Cancellation rates among regionals run above the mainline average, and it is a structural consequence of where and how they fly rather than a verdict on how well they fly.

What this means when you book

You usually cannot tell in advance which company will operate the flight, and even when the booking page discloses it, the assignment can change.

What you can do is read the right number. If you are flying a mainline brand on a route it operates itself, the mainline's figures apply. If you are flying a short regional sector into a spoke airport, the regional's figures are the relevant ones, and they will generally be weaker.

A useful proxy: the smaller the aircraft and the smaller the airport at the far end, the more likely you are on a regional and the more the cancellation column deserves your attention.

Reading their pages here

Regional carriers get pages on this site like anyone else, labelled as regional operators so the context is visible. Their figures are computed identically.

Two cautions. Their route networks change more than mainline ones, because contracts move between operators, so a carrier's figures can shift for reasons unconnected to its performance. And the mainline whose brand is on the ticket bears no reporting consequence for the regional's record, which is worth remembering when a mainline advertises its punctuality.

The airline-at-airport pages are the more useful view for this question, because they show how a specific operator performs at a specific field rather than blending a whole network.

The aircraft is a clue

You cannot always tell who is operating your flight, but the equipment narrows it considerably.

Regional jets seating roughly fifty to seventy-six passengers are almost always flown by a regional operator under a capacity purchase agreement. Turboprops on short sectors, likewise. Narrowbody jets of a hundred and thirty seats and above are usually mainline.

The distinction matters for more than statistics. Smaller aircraft have lower crosswind limits and are more often held or diverted in marginal weather, and they carry no spare capacity for a mechanical problem: if the aircraft breaks at a spoke station, there is rarely another one nearby.

Why the mainline's number looks better than your experience

This is the practical consequence for a traveller, and it is worth stating plainly.

A frequent flyer whose trips are mostly short sectors into secondary cities is flying regionals most of the time, while reading the mainline's national figure and wondering why their experience does not match it. The mainline figure is the weighted average of a network dominated by larger, longer, hub-to-hub flying. The regional sector is a different product with a different record.

The fix is to look at the route rather than the brand. Every route page here lists the operating carriers on that city pair with their own figures, which is the number that actually describes the flight you are about to book.

A last note on the tables here. Regional carriers are labelled as such on their pages and in the comparison tables, so you can tell at a glance whether a row represents a brand you can book or an operator you are assigned. That labelling is the reason a name you have never heard of can sit above a household one in a ranking without the ranking being broken.

What to ask before you book

Three questions, none of which needs the DOT data to answer.

What aircraft type is scheduled? A fifty-seat jet on a two-hour sector is almost certainly a regional operation, and the cancellation column on that operator's page is the number that describes your risk.

How many daily departures does the route have? Regional routes into secondary cities are frequently flown two or three times a day, which means a cancellation is not a three-hour problem.

Is there a mainline alternative on the same city pair, even at a worse hour? On a trip that cannot slip, a mainline narrowbody at an inconvenient time is often the better bet than a regional jet at a good one, and the route page here shows both operators side by side with their own figures.

---

Look at the operators directly: SkyWest (OO) · Republic (YX) · American Airlines