Which airline is most reliable for SEA (Seattle) to CHS (Charleston)?

The most reliable airline on the SEA to CHS route is Alaska Airlines, with an on-time arrival rate of 84%.

How often are flights delayed from SEA to CHS?

About 16% of flights from SEA to CHS experience delays. 84% arrive on time.

What's the average delay on SEA to CHS flights?

When flights from SEA to CHS are delayed, the average delay is approximately 40 minutes.

Is a short connection safe after a SEA to CHS flight?

With 84% of SEA to CHS flights arriving on time and an average delay of 40 minutes when late, a connection under 60 minutes at CHS is risky. We recommend at least 75-90 minutes for domestic connections after this route.

SEA → CHS

SEA (Seattle) to CHS (Charleston)

SEA (Seattle) to CHS (Charleston) flights arrive on time 84% of the time. The most reliable airline on this route is Alaska Airlines at 84%. The average delay is 40 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated October 2026.

SEA → CHS on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

Worse

Better

This route is on time most of the time. About 84% of flights arrive on schedule.

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

Accurate?

Good to know

Departing from SEA

81% on time

Expect ~20 min sitting on the taxiway after your gate pushes back. SEA has long runway queues.

TSA is currently ~27 min. Best time: 4 AM (about 5 min).

More about SEA →

Arriving at CHS

80% on time

When flights into CHS are late, the average delay is 75 minutes. Build buffer if you have ground plans.

If connecting at CHS: TSA is ~22 min right now. Allow at least 60 minutes for a domestic connection.

More about CHS →Connection times at CHS →

Flight cancelled or delayed?

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SEA Airport CHS Airport

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