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Route Reliability

Baltimore → Birmingham

BWI–BHM · 682 miles · Baltimore/Washington International Thurgood Marshall Airport to Birmingham–Shuttlesworth International Airport

83
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
4 min
Average arrival delay
1.2%
Cancelled
345
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 345 flights. No comparison to make.

What the data says

Morning flights do better here.

BWI–BHM flights departing between 6–9 AM arrived on time 90% of the time, versus 54% between 6–9 PM.

Sunday scaries are real for this one.

BWI–BHM flights arrived on time 92% of the time on Wednesdays and just 73% on Sundays. That gap is worth planning around.

Recent months have been rougher.

BWI–BHM flights arrived on time 78% of the time over the last three months in the data, compared with 91% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon78%(51 flights)
  • Tue87%(52 flights)
  • Wed92%(50 flights)
  • Thu75%(52 flights)
  • Fri85%(52 flights)
  • Sat90%(20 flights)
  • Sun73%(62 flights)
On-time by departure window
  • 6–9 AM90%(30 flights)
  • 9 AM–12 PM89%(165 flights)
  • 12–3 PM73%(117 flights)
  • 3–6 PM85%(13 flights)
  • 6–9 PM54%(13 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
76%
May

Jun 73% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%33
July 202576%33
August 202571%28
September 202581%26
October 202582%27
November 202594%31
December 202587%31
January 202696%25
February 202689%27
March 202674%27
April 202685%26
May 202676%25

Same trip, other airports

Keep nerding

Based on 345 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.