How often are DEN to MDW flights on time?

Flights from Denver (DEN) to Chicago (MDW) arrive on time 78% of the time across 18,357 flights of official data.

Which airline is most reliable on the DEN to MDW route?

Frontier Airlines has the best on-time record on this route at 80% across 1,452 flights.

Route reliability

Flights from Denver to Chicago arrive on time 78% of the time across 18,357 flights. Here’s how each airline really performs.

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On-time rate

18,357 flights

Airline	On-time	Flights
Frontier Airlines	80%	1,452
Southwest Airlines	78%	16,905

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

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