BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
GSP→BWI

Greer, SC (GSP) to Baltimore, MD (BWI) flight delay odds

88.2% of 719 official scheduled GSP-to-BWI flights arrived on time; 7.1% arrived at least 30 minutes late and 1.5% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
88.2%arrived on time
7.1%30+ min late
1.5%cancelled
719scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.3%all scheduled flights
120+ minutes late1.8%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival-2.0 mincompleted flights

Which departure time was most reliable for GSP to BWI?

Among qualifying GSP-to-BWI departure window results, Late morning had the highest on-time rate: 97.8% of 46 flights. Evening was lowest at 70.4% across 108 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning31993.1%2.5%1.3%
Late morning4697.8%0.0%2.2%
Afternoon24687.8%7.7%1.2%
Evening10870.4%22.2%2.8%

Which weekday was most reliable for GSP to BWI?

Among qualifying GSP-to-BWI weekday results, Wednesday had the highest on-time rate: 93.2% of 103 flights. Monday was lowest at 79.8% across 104 flights.

DayFlightsOn time30+ minCancelled
Monday10479.8%11.5%1.9%
Tuesday10692.5%4.7%0.0%
Wednesday10393.2%3.9%0.0%
Thursday10385.4%8.7%0.0%
Friday10487.5%8.7%1.0%
Saturday9590.5%6.3%3.2%
Sunday10488.5%5.8%4.8%

Which airline was most reliable for GSP to BWI?

Only Southwest Airlines met the GSP-to-BWI airline threshold: 88.2% of 719 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines71988.2%7.1%1.5%

Which month was most reliable for GSP to BWI?

Among qualifying GSP-to-BWI month results, September 2025 had the highest on-time rate: 95.0% of 60 flights. July 2025 was lowest at 71.0% across 62 flights.

MonthFlightsOn time30+ minCancelled
July 20256271.0%17.7%1.6%
August 20256287.1%6.5%0.0%
September 20256095.0%3.3%0.0%
October 20255894.8%1.7%0.0%
November 20255689.3%10.7%0.0%
December 20256085.0%11.7%1.7%
January 20266283.9%1.6%9.7%
February 20265689.3%5.4%5.4%
March 20266191.8%6.6%0.0%
April 20266095.0%3.3%0.0%
May 20266290.3%8.1%0.0%
June 20266086.7%8.3%0.0%

What drove GSP to BWI delay minutes?

Late aircraft was the largest recorded GSP-to-BWI delay category, accounting for 53.0% of 4,813 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.0%
Late aircraft53.0%
National airspace18.2%
Weather2.9%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.