BOS to SLC flight delays & on-time performance
Nonstop flights from Boston Logan International Airport to Salt Lake City International Airport · 2,105 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BOS or SLC right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Boston (BOS) to Salt Lake City (SLC) arrived on time 75% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.8% were cancelled, and 7% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (79% on time); JetBlue was the least (54%).
- Departures scheduled around 6am did best (88% on time); around 7pm did worst (41%).
- Monday was the most reliable day to fly (83% on time) and Sunday the least (69%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (45%).
Which airline is most on time from BOS to SLC?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 79% | 1.2% | 16 min | 6.0% | 1,083 |
| JetBlue | 54% | 5.2% | 27 min | 13.4% | 173 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am88%364 flights
- 8am54%26 flights
- 10am77%275 flights
- 11am77%64 flights
- 4pm89%27 flights
- 5pm72%97 flights
- 6pm68%334 flights
- 7pm41%51 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday83%4.9% cancelled
- Tuesday74%2.4% cancelled
- Wednesday78%1.9% cancelled
- Thursday72%0.0% cancelled
- Friday82%1.1% cancelled
- Saturday71%0.5% cancelled
- Sunday69%1.6% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)45%
- Air traffic control & airport congestion27%
- Late-arriving aircraft26%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather73%
- Airline (crew, maintenance, cleaning, fueling)23%
- Air traffic control & airport congestion5%
- Security0%
BOS to SLC: common questions
- How often are BOS to SLC flights on time?
- 75% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Boston to Salt Lake City cancelled?
- 1.8% of scheduled flights were cancelled (22 of 1,256).
- How long are typical delays?
- Across all flights the average arrival delay was 17 min (early arrivals count as zero). Flights that were late arrived 65 min behind schedule on average, and 7.0% of flights were an hour or more late.
- How long is taxi time at BOS?
- Flights on this route spent 22 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SLC to BOS — 82% on time
More flights from Boston
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BOS → SLC, nonstop flights by US airlines that report to the DOT. How we calculate this.