RDU to BOS flight delays
Raleigh/Durham, NC (RDU) Boston, MA (BOS) · 612 miles
242 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
81.39%
Arrived on time
Within 15 minutes of schedule
4.55%
Cancelled
Share of scheduled flights
89 min
When late, late by
Average across delayed arrivals
17 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Cancellation, not delay, is the risk worth pricing here: 4.55% of scheduled flights never operated. A late flight still gets you there. A cancelled one leaves you rebooking, and on a route with few daily departures that can mean losing a day.
The shape of the lateness matters here. Flights on this route are not late often, but when they are late they are late by about 89 minutes — long enough to lose a connection or an evening. The on-time percentage looks reassuring and understates the consequence of being on the wrong flight.
Only Delta Air Lines 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 — 242 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 March 2025 – August 2026, Delta Air Lines arrived on time most often on RDU to BOS.
Every airline on RDU 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 |
|---|---|---|---|---|---|
| Delta Air Lines | 134 | 83.59% | 4.48% | 92 min | C |
| JetBlue Airways | 87 | 79.27% | 5.75% | 83 min | — |
| Frontier Airlines | 17 | 76.47% | 0% | 79 min | — |
| Republic Airways | 4 | 75% | 0% | 167 min | — |
The return leg
BOS to RDU Boston back to Raleigh/Durham 79.4% on time COther routes from Raleigh/Durham
Common questions
Are flights from Raleigh/Durham to Boston usually delayed?
81.39% of flights on the RDU to BOS route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airlines fly from Raleigh/Durham to Boston?
Only Delta Air Lines appears in the published record on this route, with 134 flights and 83.59% arriving on time.
How often are RDU to BOS flights cancelled?
4.55% of scheduled flights did not operate — about 46 in every thousand. That is high enough that cancellation, not delay, is the risk worth planning around.
When RDU to BOS flights are late, how late are they?
About 89 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 RDU to BOS during March 2025 – August 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 →