Carrier route record
B6BOS→SLC
JetBlue Airways · Boston to Salt Lake City
- 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 BOS to SLC earns an F−, which is as low as this site's scale goes for a reason. Only 48.0% of flights arrive inside the 15-minute window, 29 points worse than the national rate of 77.3%. Late arrivals average about an hour. Treat any tight connection here as a coin flip. That rests on 181 flights, with a median arrival 15 minutes late.
The national on-time rate over the same period is 77.3%, so JetBlue on BOS to SLC runs 29 points behind the country as a whole. Across a thousand flights that is about 293 extra late arrivals.
Key figures
On time
48.0%
Arrivals under 15 minutes late, of 171 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
5.52%
National rate is 1.89%
Whole route
73.4%
Every carrier on BOS to SLC, 1,264 flights
These figures cover 181 flights between September 2025 and August 2026. Beyond the headline rate, 17.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
JetBlue against every carrier on BOS to SLC
JetBlue flew 181 of the 1,264 flights on BOS to SLC, about 14% of it. Its 48.0% on time is 25 points worse than the route as a whole, which runs 73.4%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Delta at 77.5% to JetBlue at 48.0%.
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 | 77.5% | 67 min | 1.20% | B |
| JetBlue Airways (this page)thin sample | 181 | 48.0% | 58 min | 5.52% | F− |
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 BOS to SLC record by time of day without the percentages moving on noise. The headline rate of 48.0% is the reliable figure here.
Across the year
JetBlue on BOS to SLC through the year
- Jul–Sep 20252 flights—
- Oct–Dec 202525 flights—
- Jan–Mar 202672 flights47.8%
- Apr–Jun 202620 flights—
- Jul–Sep 202662 flights35.7%
Scale runs 25% to 55%. 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 48.0% on time across 181 flights.
Split by quarter, JetBlue on BOS to SLC 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 48.0% annual figure is the one to use.
Arrival by arrival
How late JetBlue on BOS to SLC runs when it is late
The 89 late arrivals split 29 under half an hour, 30 between 30 and 60 minutes, and 30 an hour or more.
- 15+ min early15 flights8.8%
- Within 15 min67 flights39.2%
- 15–29 min late29 flights17.0%
- 30–59 min late30 flights17.5%
- 1–2 hours late19 flights11.1%
- 2+ hours late11 flights6.4%
Scale runs 0% to 100%.
Share of 171 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 68 departures that left 15 minutes late or more, only 7 made it up before arrival. In the other direction, 28 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SLC.
The worst days
Worst days for JetBlue on BOS to SLC
The latest arrival of the period was on 18 June 2026, 3 hours 29 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 June 2026 | 3 hours 29 minutes | Late-arriving aircraft |
| 27 July 2026 | 3 hours 18 minutes | Carrier |
| 22 July 2026 | 3 hours 1 minute | Late-arriving aircraft |
| 8 August 2026 | 2 hours 48 minutes | Late-arriving aircraft |
| 20 July 2026 | 2 hours 43 minutes | Carrier |
Delay causes
Why JetBlue runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 5,176 reported delay minutes.
- 34%Carrier
- 33%National Airspace System
- 30%Late-arriving aircraft
- 2%Extreme weather
33% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,733 minutes out of 5,176, against a national NAS share of 21%. The split is drawn from 5,176 reported delay minutes.
Cancellations run at 5.52%, against 1.89% nationally. That is roughly one flight in twenty 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
17.5% 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 67.6% on time across 181 flights, 20 points above 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 BOS to SLC
Put together: the delay figures matter less here than the 5.52% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 5pm–8pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 171 completed flights over 12 months sit behind that.
Related
Where to go next
- BOS to SLC, every carrier
- JetBlue on SLC to BOS, the return leg
- Delta Air Lines on BOS to SLC77.5%
- JetBlue Airways network-wide record
- Boston Logan International (BOS) delay statistics
- Salt Lake City International (SLC) delay statistics
- The US routes with the most cancellations
- What a cancellation rate actually tells you (and what it hides)
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.