DAL to BOS flight delays
Dallas, TX (DAL) Boston, MA (BOS) · 1,554 miles
324 flights · July 2024 – July 2026 · US Bureau of Transportation Statistics
64.91%
Arrived on time
Within 15 minutes of schedule
0.62%
Cancelled
Share of scheduled flights
62 min
When late, late by
Average across delayed arrivals
23 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In May it ran 67.1 points more punctual than in September — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The route has been getting better. The later months in the record run 36.8 points more punctual than the earlier ones, which usually means a schedule that was too tight has been given more room.
This is a late route. Flights from Dallas to Boston miss their scheduled arrival often enough that a tight connection at the far end is a connection at risk.
The two directions do not behave alike. BOS to DAL arrives on time 8.1 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Which airline should you fly on this route?
Over July 2024 – July 2026, Southwest Airlines arrived on time most often on DAL to BOS. Flights ran closest to schedule in November and worst in September.
Every airline on DAL to BOS
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 324 | 64.91% | 0.62% | 62 min | F |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
BOS to DAL Boston back to Dallas 56.83% on time FOther routes from Dallas
Common questions
Are flights from Dallas to Boston usually delayed?
64.91% of flights on the DAL to BOS route arrived within 15 minutes of schedule, so roughly 4 in every ten arrived late. That is worse than the average route in this record.
Which airlines fly from Dallas to Boston?
Only Southwest Airlines appears in the published record on this route, with 324 flights and 64.91% arriving on time.
How often are DAL to BOS flights cancelled?
0.62% of scheduled flights did not operate — about 6 in every thousand. That is in the normal range.
What is the best month to fly Dallas to Boston?
May, when 87.1% of flights arrived on time. The worst was September at 20%.
When DAL to BOS flights are late, how late are they?
About 62 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on DAL to BOS during July 2024 – July 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →