How reliable is Salt Lake City International Airport?
Flights from SLC departed within 15 minutes of schedule in 85% of 700,683 flights in official BTS history — and weather is calmest in Jun. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Weather favorability
year-round climate
Origin-airport operations
What the departure punctuality at SLC looks like
On-time departures
across 700,683 flights
Source: BTS Airport Operations · data through 2026-06-25. Role-specific BTS departure history; advisory context, not a guarantee for any flight.
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Weather by month
When the weather works for you at Salt Lake City
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 99/100 favorability
Roughest month
Most disruptive — low visibility & fog, snow · 81/100 favorability
Connecting through SLC
How much layover you really need
Allow at least this between domestic flights at SLC. Below it, one small delay risks a misconnect.
International transfers add immigration and bag recheck — give yourself this buffer at SLC or more.
PlaneSane connection-time estimate tuned for SLC's terminal layout. We score every connecting itinerary against conservative connection floors.
The read on SLC
What the numbers say about flying through Salt Lake City International Airport
Across official performance history, flights from Salt Lake City left within 15 minutes of schedule about 85% of the time over 700,683 flights. That's one of the more dependable operational records you'll see. Pair it with a low cancellation rate of 0.8%, so flights here rarely vanish outright. When a departure does run late, the typical delay is around 8 minutes.
On weather, Salt Lake City is an unusually calm-weather airport year-round. June is the calmest stretch for flying, scoring 99 out of 100 for favorable conditions, while December is the most disruptive at 81, driven mainly by low visibility & fog and snow. The seasonal swing is real but manageable; favor the calmer months when your dates are flexible.
If you're connecting through SLC, give yourself room. A domestic connection wants at least about 45 minutes, and international transfer wants roughly 90 minutes once immigration and a bag recheck are in the mix. Those are floors, not comfortable buffers — one inbound delay can erase them, so add margin when the connection matters.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Salt Lake City, read how we weigh it all in how the PlaneSane Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about SLC
- How reliable is Salt Lake City International Airport (SLC)?
- Flights from Salt Lake City left within 15 minutes of schedule roughly 85% of the time across 700,683 flights of official history — one of the more dependable operational records you'll see. The cancellation rate runs about 0.8%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from SLC for good weather?
- June has the calmest flying weather at Salt Lake City International Airport. December is the most disruptive, mainly from low visibility & fog and snow.
- How much layover time do you need at SLC?
- Allow at least about 45 minutes for a domestic connection and about 90 minutes for an international one as a floor. These are minimums, not comfortable buffers — a single inbound delay can wipe them out, so add margin when you can.
Planning a trip through Salt Lake City?
Score real flights to and from SLC on reliability, weather, and connection safety — not just price.