How often are IAD to LGA flights on time?

Flights from Washington (IAD) to New York (LGA) arrive on time 90% of the time across 11,718 flights of official data.

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

Delta Air Lines has the best on-time record on this route at 94% across 458 flights.

Route reliability

Flights from Washington to New York arrive on time 90% of the time across 11,718 flights. Here’s how each airline really performs.

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On-time rate

11,718 flights

Airline	On-time	Flights
Delta Air Lines	94%	458
United Airlines	90%	11,260

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

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