Carrier route record
B6SLC→BOS
JetBlue Airways · Salt Lake City to Boston
- Flights
- 181
- Period
- September 2025 to August 2026
- Share of route
- 14%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on SLC to BOS draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 181 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.3%, so JetBlue on SLC to BOS runs 10 points behind the country as a whole. Across a thousand flights that is about 97 extra late arrivals.
Key figures
On time
67.6%
Arrivals under 15 minutes late, of 170 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
6.08%
National rate is 1.89%
Whole route
80.6%
Every carrier on SLC to BOS, 1,264 flights
These figures cover 181 flights between September 2025 and August 2026. Beyond the headline rate, 13.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
JetBlue against every carrier on SLC to BOS
JetBlue flew 181 of the 1,264 flights on SLC to BOS, about 14% of it. Its 67.6% on time is 13 points worse than the route as a whole, which runs 80.6%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Delta at 82.7% to JetBlue at 67.6%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 1,083 | 82.7% | 59 min | 1.29% | B |
| JetBlue Airways (this page)thin sample | 181 | 67.6% | 71 min | 6.08% | C− |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When JetBlue runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 181 flights.
There are not enough flights in each departure window to split JetBlue's SLC to BOS record by time of day without the percentages moving on noise. The headline rate of 67.6% is the reliable figure here.
Across the year
JetBlue on SLC to BOS through the year
- Jul–Sep 20252 flights—
- Oct–Dec 202525 flights—
- Jan–Mar 202672 flights70.6%
- Apr–Jun 202620 flights—
- Jul–Sep 202662 flights51.8%
Scale runs 45% to 75%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 67.6% on time across 181 flights.
Split by quarter, JetBlue on SLC to BOS logged 2 flights in Jul–Sep 2025, 25 flights in Oct–Dec 2025, 72 flights in Jan–Mar 2026, 20 flights in Apr–Jun 2026 and 62 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 67.6% annual figure is the one to use.
Arrival by arrival
How late JetBlue on SLC to BOS runs when it is late
JetBlue on SLC to BOS often beats the schedule: 43 of 170 completed flights, 25%, arrived 15 minutes or more early. The 55 late arrivals split 16 under half an hour, 16 between 30 and 60 minutes, and 23 an hour or more.
- 15+ min early43 flights25.3%
- Within 15 min72 flights42.4%
- 15–29 min late16 flights9.4%
- 30–59 min late16 flights9.4%
- 1–2 hours late11 flights6.5%
- 2+ hours late12 flights7.1%
Scale runs 0% to 100%.
Share of 170 completed flights by arrival against schedule.
22 of 74 late departures made up the time and arrived on time, 30% of them. Only 3 left on time and still arrived late.
The worst days
Worst days for JetBlue on SLC to BOS
The latest arrival of the period was on 8 August 2026, 3 hours 14 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 August 2026 | 3 hours 14 minutes | Late-arriving aircraft |
| 27 July 2026 | 3 hours 6 minutes | Late-arriving aircraft |
| 18 June 2026 | 2 hours 55 minutes | Late-arriving aircraft |
| 20 February 2026 | 2 hours 53 minutes | Late-arriving aircraft |
| 11 August 2026 | 2 hours 43 minutes | Late-arriving aircraft |
Delay causes
Why JetBlue runs late on this route
Late-arriving aircraft accounts for 75% of the 3,887 delay minutes carriers reported here, and the remaining four split what is left.
- 75%Late-arriving aircraft
- 19%Carrier
- 5%National Airspace System
- 1%Extreme weather
75% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,887 reported delay minutes here, that single category outweighs weather by 75 to one. The split is drawn from 3,887 reported delay minutes.
Cancellations run at 6.08%, against 1.89% nationally. That is roughly one flight in fifteen cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
13.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 2,105 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg is a different operation and performs like one: it runs 48.0% on time across 181 flights, 20 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 20 points of difference.
One caution: this is a thin sample. 181 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking JetBlue on SLC to BOS
Put together: the delay figures matter less here than the 6.08% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 8pm–5am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 170 completed flights over 12 months sit behind that.
Related
Where to go next
- SLC to BOS, every carrier
- JetBlue on BOS to SLC, the return leg
- Delta Air Lines on SLC to BOS82.7%
- JetBlue Airways network-wide record
- Salt Lake City International (SLC) delay statistics
- Boston Logan International (BOS) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.