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Route Reliability

Denver → Baltimore

DEN–BWI · 1,491 miles · Denver International Airport to Baltimore/Washington International Thurgood Marshall Airport

79
Usually Fine
WanderNerd Reliability Score
78%
Arrive within 15 minutes
6 min
Average arrival delay
1.3%
Cancelled
2,925
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines82%931 flights
  2. 2.Southwest Airlines76%1,917 flights

Not enough history to rank: Frontier Airlines (77 flights). We rank airlines only after 100 flights on the route.

What the data says

Morning flights do better here.

DEN–BWI flights departing between 3–6 AM arrived on time 96% of the time, versus 47% between 6–9 PM.

Wednesday comes out ahead.

A small edge: 81% on time on Wednesdays against 75% on Sundays.

United Airlines has a slight edge here.

United Airlines arrived on time 82% of the time on this route; Southwest Airlines managed 76%.

Slipping a little lately.

DEN–BWI flights arrived on time 80% of the time over the last three months in the data, compared with 84% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon77%(440 flights)
  • Tue81%(403 flights)
  • Wed81%(405 flights)
  • Thu76%(413 flights)
  • Fri79%(434 flights)
  • Sat78%(390 flights)
  • Sun75%(389 flights)
On-time by departure window
  • 12–3 AM—(7 flights)
  • 3–6 AM96%(249 flights)
  • 6–9 AM89%(342 flights)
  • 9 AM–12 PM85%(625 flights)
  • 12–3 PM73%(436 flights)
  • 3–6 PM65%(628 flights)
  • 6–9 PM47%(183 flights)
  • 9 PM–12 AM85%(404 flights)
On-time trend by month
77%
May

Jun 69% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%298
July 202562%305
August 202574%278
September 202580%265
October 202587%269
November 202583%236
December 202581%238
January 202687%191
February 202683%180
March 202678%207
April 202683%202
May 202677%205

Same trip, other airports

Keep nerding

Based on 2,925 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.