How often are IAD to ATL flights on time?

Flights from Washington (IAD) to Atlanta (ATL) arrive on time 87% of the time across 22,408 flights of official data.

Which airline is most reliable on the IAD to ATL route?

Southwest Airlines has the best on-time record on this route at 91% across 1,864 flights.

Route reliability

Flights from Washington to Atlanta arrive on time 87% of the time across 22,408 flights. Here’s how each airline really performs.

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On-time rate

22,408 flights

On-time = arrived within 15 minutes of schedule, per BTS TranStats. Compare the reverse leg ATL → IAD.

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Score real IAD–ATL flights on reliability, weather, and connection safety — not just price.