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

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

66.2% of 260 official scheduled DAL-to-BOS flights arrived on time; 21.9% arrived at least 30 minutes late and 0.8% 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 SIGNALVariable
66.2%arrived on time
21.9%30+ min late
0.8%cancelled
260scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late13.1%all scheduled flights
120+ minutes late4.2%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+16.3 mincompleted flights

Which departure time was most reliable for DAL to BOS?

Among qualifying DAL-to-BOS departure window results, Early morning had the highest on-time rate: 83.6% of 122 flights. Afternoon was lowest at 41.7% across 96 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning12283.6%6.6%0.8%
Afternoon9641.7%43.8%1.0%

Which weekday was most reliable for DAL to BOS?

Among qualifying DAL-to-BOS weekday results, Saturday had the highest on-time rate: 72.5% of 40 flights. Thursday was lowest at 57.9% across 38 flights.

DayFlightsOn time30+ minCancelled
Monday4065.0%30.0%0.0%
Thursday3857.9%23.7%2.6%
Friday4362.8%27.9%0.0%
Saturday4072.5%12.5%2.5%
Sunday4468.2%25.0%0.0%

Which airline was most reliable for DAL to BOS?

Only Southwest Airlines met the DAL-to-BOS airline threshold: 66.2% of 260 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines26066.2%21.9%0.8%

Which month was most reliable for DAL to BOS?

Among qualifying DAL-to-BOS month results, November 2025 had the highest on-time rate: 94.4% of 18 flights. September 2025 was lowest at 19.0% across 21 flights.

MonthFlightsOn time30+ minCancelled
July 20253148.4%38.7%0.0%
August 20252373.9%21.7%0.0%
September 20252119.0%61.9%4.8%
October 20253040.0%36.7%0.0%
November 20251894.4%5.6%0.0%
December 20251553.3%40.0%0.0%
March 20262781.5%3.7%3.7%
April 20263083.3%6.7%0.0%
May 20263187.1%3.2%0.0%
June 20263073.3%16.7%0.0%

What drove DAL to BOS delay minutes?

National airspace was the largest recorded DAL-to-BOS delay category, accounting for 48.9% of 5,197 BTS-attributed delay minutes during July 2025–June 2026.

Airline18.5%
Late aircraft24.4%
National airspace48.9%
Weather8.1%
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.