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

Boston, MA (BOS) to Dallas, TX (DAL) flight delay odds

Historically, 52.7% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 260 flights.

HISTORICAL ROUTE SIGNALHigher disruption
52.7%arrived on time
33.8%30+ min late
0.0%cancelled
260scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late17.3%all scheduled flights
120+ minutes late5.4%all scheduled flights
Diverted0.8%did not reach as scheduled
Average arrival+26.5 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
Afternoon13657.4%30.1%0.0%
Evening9231.5%48.9%0.0%

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
Monday4050.0%35.0%0.0%
Thursday3847.4%42.1%0.0%
Friday4365.1%23.3%0.0%
Saturday4067.5%17.5%0.0%
Sunday4450.0%40.9%0.0%

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 Airlines26052.7%33.8%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20253167.7%12.9%0.0%
August 20252365.2%21.7%0.0%
September 20252128.6%57.1%0.0%
October 20253056.7%30.0%0.0%
November 20251883.3%16.7%0.0%
December 20251586.7%6.7%0.0%
January 20264100.0%0.0%0.0%
March 20262737.0%44.4%0.0%
April 20263043.3%43.3%0.0%
May 20263138.7%45.2%0.0%
June 20263036.7%50.0%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.

Airline20.2%
Late aircraft58.2%
National airspace18.4%
Weather3.3%
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.