American vs. United: Which Legacy Carrier Is More Reliable?

United is the more reliable legacy carrier: 79.5% of United flights arrived on time over the past 24 months versus 74.7% for American, and United cancelled just 1.1% of flights versus American's 2.0%. Based on FlightRecord's dataset of 14.1 million US DOT flight records, June 2024–May 2026.

Key takeaways

• United: 79.5% on-time across 1,587,899 flights. American: 74.7% across 1,962,986 flights — a 4.8-point gap, one of the widest of any legacy-carrier matchup.
• United cancels flights at roughly half American's rate: 1.1% versus 2.0%.
• The gap holds up on head-to-head routes — on Chicago O'Hare to Newark, American's on-time rate was 58.1% versus United's 71.7%.
• American's regional partners are a mixed bag: Envoy Air actually beats American mainline at 79.7% on-time, but PSA Airlines trails badly at 74.3% on-time and 3.9% cancelled.
• Both carriers land within reach of the 78.2% national on-time average — United comfortably above it, American below it.

Which airline has the better on-time record, American or United?

United wins clearly. Over the 24 months in FlightRecord's dataset, United Airlines arrived on time on 79.5% of its 1,587,899 flights, with an average arrival delay of 15.5 minutes. American Airlines arrived on time on 74.7% of its 1,962,986 flights, with an average arrival delay of 22.1 minutes. That 4.8-point on-time gap and nearly seven-minute delay gap are both large by the standards of this site’s airline comparisons — most legacy-carrier matchups run tighter than this.

Both sample sizes are enormous — well above the 30-flight minimum FlightRecord uses to avoid publishing noisy statistics — so this isn’t a small-sample fluke. It’s a consistent, 24-month pattern across nearly 3.6 million combined flights.

How do their cancellation rates compare?

American cancelled 2.0% of its roughly 2 million flights over the period; United cancelled 1.1% of its roughly 1.6 million flights. In other words, American cancels flights at almost double United's rate. Against the 1.6% national average across all 15 US carriers, United sits comfortably below it and American sits above it.

The cancellation gap matters more than it might look on paper. Over a full year of flying at these volumes, American's higher rate translates into tens of thousands more cancelled trips than United would produce carrying a similar number of passengers.

Do the results hold up on routes both airlines fly?

Yes, on most of the routes where both carriers compete head-to-head with a meaningful number of flights. A few examples from routes with well over 300 flights per carrier over the 24-month window:

• Chicago O’Hare to Los Angeles: American 73.7% on-time (5,904 flights) versus United 79.5% on-time (6,514 flights).
• Dallas–Fort Worth to Chicago O’Hare: American 69.8% on-time (8,274 flights) versus United 76.0% on-time (3,874 flights).
• Chicago O’Hare to Newark: American 58.1% on-time (1,517 flights) versus United 71.7% on-time (8,634 flights) — the widest gap of any shared route in the dataset.
• Denver to Dallas–Fort Worth: American 74.3% on-time (6,051 flights) versus United 77.0% on-time (3,857 flights).

It isn’t a total sweep. On Washington Reagan National to Chicago O’Hare, American actually edges United slightly, 77.8% versus 76.5%. But on the reverse direction, Chicago O’Hare to Washington Reagan, United comes back ahead, 72.6% versus 69.0%. The overall pattern favors United on the large majority of shared routes, even if it isn’t universal.

How do American’s and United’s regional partners compare?

American mainline flies alongside two regional carriers that operate almost exclusively as American Eagle: Envoy Air and PSA Airlines. The two post very different numbers. Envoy actually outperforms American mainline — 79.7% on-time and a 1.9% cancellation rate across 597,586 flights. PSA is the opposite story: 74.3% on-time and a 3.9% cancellation rate across 489,281 flights, the highest cancellation rate of any US carrier in this dataset.

United's most prominent regional partner, SkyWest, doesn't offer as clean a comparison. SkyWest flies as United Express, but it also flies as Delta Connection and Alaska Horizon — FlightRecord's data can't isolate the United-only slice of SkyWest's operation. SkyWest's overall numbers (79.4% on-time, 1.4% cancelled across 1,647,064 flights) look solid, but attributing them specifically to United would overstate what the data actually shows.

What the clean comparison does show: if you’re booking an American Eagle flight, which carrier actually operates it matters. Envoy is more reliable than American mainline. PSA is meaningfully less reliable.

Which airline should you fly if reliability matters most?

On the two measures that matter most for avoiding a bad travel day — on-time arrival and outright cancellation — United beats American by a wide margin across nearly two full years of US DOT data. If you’re choosing between the two for a specific trip, it’s worth checking the actual route and, where flight numbers are published far enough in advance, the specific flight, since performance varies by route and by time of day even within one airline’s network.

Past performance isn’t a guarantee for any specific future flight — weather, air traffic control, and mechanical issues affect individual departures regardless of which airline’s tail number is on the jet bridge. But as a 24-month base rate across nearly 3.6 million combined flights, United’s advantage over American is one of the more decisive gaps on this site.

Frequently Asked Questions

Is American or United more likely to cancel my flight?

American is more likely to cancel. Over the past 24 months American cancelled 2.0% of its flights compared to United’s 1.1%, based on FlightRecord’s dataset of 14.1 million US DOT flight records. That means American’s cancellation rate runs almost double United’s across nearly 3.6 million combined flights.

What is American Airlines' on-time rate?

American Airlines arrived on time on 74.7% of its 1,962,986 flights over the 24 months ending May 2026, with an average arrival delay of 22.1 minutes on delayed flights. That’s below the 78.2% national average across all 15 US carriers in the dataset.

What is United Airlines' on-time rate?

United Airlines arrived on time on 79.5% of its 1,587,899 flights over the same period, with an average arrival delay of 15.5 minutes. That's above the 78.2% national average and 4.8 points ahead of American.

Are American Eagle flights included in American’s on-time rate?

No. Regional carriers like Envoy Air and PSA Airlines fly under their own carrier codes in US DOT data even when marketed as American Eagle, so their statistics are tracked separately from American mainline. See why American Eagle flights don’t show as American Airlines for the full explanation.

Does United have regional partners like American does?

Yes — United Express flights are operated by carriers including SkyWest, but SkyWest also flies as Delta Connection and Alaska Horizon, so its performance can’t be cleanly attributed to United alone the way Envoy and PSA can be attributed to American.

Which American or United routes are the least reliable?

It varies by route rather than following one uniform pattern. On Chicago O’Hare to Newark, American’s on-time rate fell to 58.1% versus United’s 71.7% — the widest gap between the two carriers on any shared route with a statistically meaningful sample in this dataset.

Methodology

This comparison uses FlightRecord's full 24-month aggregated dataset (June 2024–May 2026, 14.1 million US DOT flight records). Airline-level figures come from each carrier's complete flight volume over the window; on-time is the DOT standard (arrived less than 15 minutes late), and cancelled/diverted flights are reported separately rather than folded into delay averages. Route-level comparisons only include origin-destination pairs where both American and United logged more than 300 flights over the 24 months, to avoid small-sample noise — well above the site's 30-flight minimum for any published statistic. Full detail on the methodology is at flightrecord.app/methodology.

Past on-time and cancellation rates describe historical patterns across large flight volumes — they don’t guarantee how any single upcoming flight will perform.