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Route Reliability

Baltimore → Greenville

BWI–GSP · 426 miles · Baltimore/Washington International Thurgood Marshall Airport to Greenville–Spartanburg International Airport

85
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
6 min
Average arrival delay
1.3%
Cancelled
720
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 720 flights. No comparison to make.

What the data says

Morning-you made the right choice.

BWI–GSP flights departing between 9 AM–12 PM arrived on time 93% of the time, versus 50% between 9 PM–12 AM.

Sunday scaries are real for this one.

BWI–GSP flights arrived on time 85% of the time on Thursdays. On Sundays: 78%.

Flights on this route

The breakdown

On-time by weekday
  • Mon79%(104 flights)
  • Tue84%(104 flights)
  • Wed84%(104 flights)
  • Thu85%(103 flights)
  • Fri83%(102 flights)
  • Sat85%(92 flights)
  • Sun78%(102 flights)
On-time by departure window
  • 6–9 AM92%(272 flights)
  • 9 AM–12 PM93%(91 flights)
  • 3–6 PM80%(10 flights)
  • 6–9 PM73%(324 flights)
  • 9 PM–12 AM50%(14 flights)
On-time trend by month
82%
May

Jun 63% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%59
July 202572%61
August 202586%62
September 202592%60
October 202590%58
November 202589%56
December 202572%60
January 202691%56
February 202684%55
March 202684%62
April 202687%60
May 202682%62

Same trip, other airports

Keep nerding

Based on 720 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.