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

Baltimore, MD (BWI) to San Juan, PR (SJU) flight delay odds

Historically, 64.9% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,183 flights.

HISTORICAL ROUTE SIGNALVariable
64.9%arrived on time
21.6%30+ min late
2.5%cancelled
1,183scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.1%all scheduled flights
120+ minutes late3.7%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+20.0 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 morning45076.0%11.1%2.7%
Late morning13664.7%25.7%4.4%
Afternoon12157.0%29.8%3.3%
Evening46657.1%27.3%1.7%

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
Monday17258.1%25.0%4.7%
Tuesday14971.1%16.8%2.7%
Wednesday14678.1%15.1%0.7%
Thursday17162.6%25.1%0.6%
Friday17163.7%26.3%1.2%
Saturday19166.5%18.8%4.2%
Sunday18357.4%22.4%3.3%

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 Airlines82167.4%20.0%0.9%
Spirit Airlines20567.3%17.1%5.9%
Frontier Airlines15749.0%35.7%7.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202514153.9%28.4%3.5%
August 202510358.3%34.0%1.0%
September 20257077.1%11.4%0.0%
October 20256173.8%18.0%0.0%
November 20257569.3%16.0%1.3%
December 202511560.9%25.2%0.9%
January 202610861.1%16.7%11.1%
February 20269164.8%23.1%4.4%
March 202610968.8%19.3%3.7%
April 202611173.0%15.3%0.9%
May 20269070.0%16.7%0.0%
June 202610961.5%25.7%0.9%

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.

Airline36.9%
Late aircraft29.4%
National airspace24.3%
Weather8.7%
Security0.8%
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.