Skip to content
WanderNerd
Check a flight

Route Reliability

Baltimore → Denver

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

78
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
8 min
Average arrival delay
1.2%
Cancelled
2,920
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.United Airlines87%932 flights
  2. 2.Southwest Airlines73%1,911 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.

BWI–DEN flights departing between 6–9 AM arrived on time 91% of the time, versus 52% between 9 PM–12 AM.

Friday is doing you no favors.

BWI–DEN flights arrived on time 80% of the time on Tuesdays. On Fridays: 73%.

United Airlines runs this route best.

United Airlines arrived on time 87% of the time on this route; Southwest Airlines managed 73%.

Ticking up lately.

BWI–DEN flights arrived on time 79% of the time over the last three months in the data, compared with 74% 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
  • Mon79%(437 flights)
  • Tue80%(402 flights)
  • Wed74%(405 flights)
  • Thu76%(413 flights)
  • Fri73%(441 flights)
  • Sat78%(389 flights)
  • Sun78%(388 flights)
On-time by departure window
  • 6–9 AM91%(877 flights)
  • 9 AM–12 PM87%(431 flights)
  • 12–3 PM75%(345 flights)
  • 3–6 PM64%(801 flights)
  • 6–9 PM66%(359 flights)
  • 9 PM–12 AM52%(62 flights)
On-time trend by month
80%
May

Jun 67% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%297
July 202565%306
August 202577%279
September 202585%266
October 202590%268
November 202584%235
December 202563%239
January 202679%191
February 202679%181
March 202671%204
April 202688%202
May 202680%207

Same trip, other airports

Keep nerding

Based on 2,920 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.