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Route Reliability

Portland → Baltimore

PWM–BWI · 452 miles · Portland International Jetport to Baltimore/Washington International Thurgood Marshall Airport

85
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
8 min
Average arrival delay
0.9%
Cancelled
1,343
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 82% of the time across 1,343 flights. No comparison to make.

What the data says

Morning-you made the right choice.

PWM–BWI flights departing between 6–9 AM arrived on time 90% of the time, versus 69% between 3–6 PM.

Friday is doing you no favors.

PWM–BWI flights arrived on time 87% of the time on Wednesdays. On Fridays: 76%.

Flights on this route

The breakdown

On-time by weekday
  • Mon80%(194 flights)
  • Tue80%(181 flights)
  • Wed87%(180 flights)
  • Thu83%(194 flights)
  • Fri76%(201 flights)
  • Sat84%(186 flights)
  • Sun82%(190 flights)
On-time by departure window
  • 3–6 AM89%(341 flights)
  • 6–9 AM90%(60 flights)
  • 9 AM–12 PM89%(177 flights)
  • 12–3 PM83%(362 flights)
  • 3–6 PM69%(385 flights)
  • 6–9 PM—(1 flights)
On-time trend by month
83%
May

Jun 75% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%118
July 202567%119
August 202585%134
September 202591%121
October 202589%123
November 202588%108
December 202577%107
January 202679%93
February 202688%89
March 202678%105
April 202682%103
May 202683%106

Same trip, other airports

Keep nerding

Based on 1,343 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.