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

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

Historically, 88.2% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 719 flights.

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

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

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%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

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%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

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

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

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 reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

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.