72% of DCA → DEN flights arrived on time in June-August 2026 (336 flights). The most reliable was F9 685, on time 89% of the time on this route. Morning flights did best (89%), evening flights worst (56%). Reagan National (DCA): no delay reported. Denver (DEN): no delay reported.
Best time of day to fly DCA → DEN
| Morning (before noon) | |
| Afternoon (noon-5 PM) | |
| Evening (after 5 PM) |
Flights DCA → DEN, most reliable first
| Flight | Departs | On time on this route | Cancelled |
|---|---|---|---|
| F9 685 Frontier | 7:00 AM | 1.1% | |
| UA 746 United | 4:13 PM | 1.1% | |
| F9 687 Frontier | 1:59 PM | 0% | |
| F9 689 Frontier | 6:00 PM | 1.3% |
DCA conditions · DEN conditions · DEN → DCA · Cancellations
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From BTS on-time data, June-August 2026; flights with 20+ trips on this route. On-time rates cover each flight number's whole day, which can include other legs. Departure times are local.