Which airline is most reliable for PDX (Portland) to ORD (Chicago)?

The most reliable airline on the PDX to ORD route is United Airlines, with an on-time arrival rate of 86%.

How often are flights delayed from PDX to ORD?

About 18% of flights from PDX to ORD experience delays. 82% arrive on time.

What's the average delay on PDX to ORD flights?

When flights from PDX to ORD are delayed, the average delay is approximately 75 minutes.

Is a short connection safe after a PDX to ORD flight?

With 82% of PDX to ORD flights arriving on time and an average delay of 75 minutes when late, a connection under 60 minutes at ORD is risky. We recommend at least 75-90 minutes for domestic connections after this route.

PDX → ORD

PDX (Portland) to ORD (Chicago)

PDX (Portland) to ORD (Chicago) flights arrive on time 82% of the time. The most reliable airline on this route is United Airlines at 86%. The average delay is 75 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated October 2026.

PDX → ORD on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

Worse

Better

This route is on time most of the time. About 82% of flights arrive on schedule.

Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Accurate?

United Airlines is significantly more reliable on this route at 86% on time vs Spirit Airlines at 51%.

Airline Comparison

United Airlines leads at 86% on time; Spirit Airlines trails at 51%.

Accurate?

Good to know

Departing from PDX

83% on time

Expect ~17 min sitting on the taxiway after your gate pushes back. PDX has long runway queues.

TSA is currently ~5 min. Best time: 4 AM (about 5 min).

More about PDX →

Arriving at ORD

77% on time

When flights into ORD are late, the average delay is 79 minutes. Build buffer if you have ground plans.

If connecting at ORD: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.

More about ORD →Connection times at ORD →

Flight cancelled or delayed?

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Flying out of PDX? We'll brief you.

Delays, TSA, weather, gates — we'll let you know if something matters.

PDX Airport ORD Airport

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Data last updated October 2026. Source: Bureau of Transportation Statistics.