GRU to BOS flight delays
São Paulo (GRU) Boston, MA (BOS)
347 flights · July 2024 – July 2026 · ANAC Brazil and US Bureau of Transportation Statistics
55.43%
Arrived on time
Within 15 minutes of schedule
1.73%
Cancelled
Share of scheduled flights
50 min
When late, late by
Average across delayed arrivals
24 min
Delay per flight
Averaged over every flight flown
What the record says about this route
This is a late route. Flights from São Paulo to Boston miss their scheduled arrival often enough that a tight connection at the far end is a connection at risk.
This route does worse than its own airport. GRU as a whole runs 20.9 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
Only LATAM Brasil flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
This is a thin route — 347 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
Which airline should you fly on this route?
Over July 2024 – July 2026, LATAM Brasil arrived on time most often on GRU to BOS. Flights ran closest to schedule in October and worst in January.
Every airline on GRU 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 |
|---|---|---|---|---|---|
| LATAM Brasil | 312 | 56.82% | 1.28% | 41 min | F |
| Delta Air Lines | 35 | 42.42% | 5.71% | 110 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
BOS to GRU Boston back to São Paulo 55.13% on time FOther routes from São Paulo
Common questions
Are flights from São Paulo to Boston usually delayed?
55.43% of flights on the GRU 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 São Paulo to Boston?
Only LATAM Brasil appears in the published record on this route, with 312 flights and 56.82% arriving on time.
How often are GRU to BOS flights cancelled?
1.73% of scheduled flights did not operate — about 17 in every thousand. That is in the normal range.
When GRU to BOS flights are late, how late are they?
About 50 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 GRU 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 →