Which airline is most reliable for IAD (Washington) to RDU (Raleigh)?

The most reliable airline on the IAD to RDU route is United Airlines, with an on-time arrival rate of 85%.

How often are flights delayed from IAD to RDU?

About 16% of flights from IAD to RDU experience delays. 84% arrive on time.

What's the average delay on IAD to RDU flights?

When flights from IAD to RDU are delayed, the average delay is approximately 69 minutes.

Is a short connection safe after a IAD to RDU flight?

With 84% of IAD to RDU flights arriving on time and an average delay of 69 minutes when late, a connection under 60 minutes at RDU is risky. We recommend at least 75-90 minutes for domestic connections after this route.

IAD → RDU

IAD (Washington) to RDU (Raleigh)

IAD (Washington) to RDU (Raleigh) flights arrive on time 84% of the time. The most reliable airline on this route is United Airlines at 85%. The average delay is 69 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated August 2026.

IAD → RDU 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?

Airlines are roughly equal on this route — United Airlines leads slightly at 85% vs Republic Airways at 83%.

Airline Comparison

United Airlines leads at 85% on time; Republic Airways trails at 83%.

Accurate?

Good to know

Departing from IAD

82% on time

Expect ~21 min sitting on the taxiway after your gate pushes back. IAD has long runway queues.

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

More about IAD →

Arriving at RDU

79% on time

When flights into RDU are late, the average delay is 73 minutes. Build buffer if you have ground plans.

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

More about RDU →Connection times at RDU →

Flight cancelled or delayed?

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IAD Airport RDU Airport

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