BWI to DEN flight delays & on-time performance
Nonstop flights from Baltimore/Washington International Thurgood Marshall Airport to Denver International Airport · 1,491 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BWI or DEN right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Baltimore (BWI) to Denver (DEN) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.2% were cancelled, and 6% arrived an hour or more late.
- United Airlines was the most punctual airline here (86% on time); Southwest Airlines was the least (74%).
- Departures scheduled around 7am did best (88% on time); around 5pm did worst (58%).
- Tuesday was the most reliable day to fly (83% on time) and Friday the least (74%).
- The largest source of delay minutes was late-arriving aircraft (33%).
Which airline is most on time from BWI to DEN?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 86% | 0.5% | 10 min | 4.5% | 871 |
| Southwest Airlines | 74% | 1.5% | 15 min | 6.7% | 1,900 |
| Frontier Airlines | 60% | 0.0% | 26 min | 14.0% | 43 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am85%179 flights
- 7am88%239 flights
- 8am88%455 flights
- 9am88%137 flights
- 10am85%225 flights
- 11am94%32 flights
- 12pm75%116 flights
- 1pm63%115 flights
- 2pm74%126 flights
- 3pm65%152 flights
- 4pm75%476 flights
- 5pm58%154 flights
- 6pm63%161 flights
- 7pm80%89 flights
- 8pm65%106 flights
- 9pm52%42 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday77%1.9% cancelled
- Tuesday83%1.3% cancelled
- Wednesday75%0.3% cancelled
- Thursday76%0.5% cancelled
- Friday74%0.7% cancelled
- Saturday77%0.5% cancelled
- Sunday78%3.1% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft33%
- Air traffic control & airport congestion31%
- Airline (crew, maintenance, cleaning, fueling)31%
- Extreme weather3%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather73%
- Airline (crew, maintenance, cleaning, fueling)18%
- Air traffic control & airport congestion9%
- Security0%
BWI to DEN: common questions
- How often are BWI to DEN flights on time?
- 77% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Baltimore to Denver cancelled?
- 1.2% of scheduled flights were cancelled (33 of 2,814).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 53 min behind schedule on average, and 6.1% of flights were an hour or more late.
- How long is taxi time at BWI?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: DEN to BWI — 77% on time
More flights from Baltimore
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BWI → DEN, nonstop flights by US airlines that report to the DOT. How we calculate this.