REDMOND – Need to get to San Francisco for a must-make meeting? Take the noon-hour flight from Redmond, but avoid the midafternoon flight, which is late a quarter of the time.

If you have a lunch meeting in Portland, the late-morning flight on United Express will get you there on time — it has never been more than six minutes late in the last two months.

While flights in and out of the Redmond Airport were on time about 83 percent of the time in the last two months, well above the national average of about 75 percent, a handful of arrivals and departures were far less reliable, based on a review of flight statistics for May and June.

The Allegiant Airlines flights to and from Las Vegas were generally the worst performers, with on-time arrivals only about 60 percent of the time. But the delays typically averaged only 20 minutes.

Tyra Squyres, a spokeswoman for Allegiant in Las Vegas, said there was no “recurring theme” for why her airline’s flights to and from Redmond were so frequently delayed. Factors like maintenance holdups, crew issues, air traffic control and planes being delayed from other airports all held up various flights, she said. “It is something that we take seriously, and we have an area with room for improvement.”

Overall, the worst flight is SkyWest 5792, the United Express flight that flies from San Francisco to Redmond and back each afternoon. It ranked the lowest of any flight at Redmond based on data from FlightStats.com, a company that ranks flights based on FAA data showing how often they are delayed and how long the average delays are. The flight from San Francisco was late nearly 40 percent of the time, and delays averaged 24 minutes.

The longest delay for that flight in the last two months was more than three hours, which happened at least twice last week, as haze slowed down the flow of traffic in and out of San Francisco.

Preston Callicott is no stranger to the delays on the San Francisco flight. For the last five years, the Bend resident has commuted weekly to his job as the chief information officer of a financial services company in the Bay Area.

“When I fly down, I always assume it’s going to be late, and so I never plan anything, meetings or otherwise,” Callicott said.

He’s among a group of business travelers who commute regularly between Central Oregon and San Francisco, and have learned to tolerate the delays.

But almost always, those delays are out of SkyWest’s control, said Marissa Snow, a spokeswoman in St. George, Utah, for the airline.

“Overall on-time performance and a quality operation is a really high priority for us, but there are things we can’t control,” Snow said. “Weather and air traffic control would be some of those.”

She noted that in April, the most recent month for which data was available from the U.S. Department of Transportation, SkyWest’s nationwide on-time record was better than any other airline.

During the winter months, SkyWest’s flights between Portland and Redmond arrived as scheduled about 90 percent of the time, compared with 98 percent of them in the past two months.

The San Francisco flights were much less reliable between November and March, though. The flights were late 35 percent of the time, and, when late, arrived in San Francisco an average of 90 minutes later than they were supposed to.

During the winter, the time it takes to de-ice the planes in Redmond can push back departure times an hour or more, Callicott said. It’s something he’s learned to tolerate, although “it’s definitely wearing thin.”

Delays for all airlines are somewhat common at San Francisco, where fog or storms can reduce visibility, cutting in half the number of planes that can take off and land each hour. And there’s not much the airlines can do about that.

“The fires in the last couple of weeks make it difficult to do a visual approach, which slows the airport down,” Snow said.

Carrie Novick, manager of the Redmond Airport, said it’s rare to hear complaints from passengers about airline service, though she has heard some gripes about delays on the San Francisco route.

“If you go into San Francisco, you have to expect (delays) because of the weather there, but that’s the only thing I’ve ever heard any complaints about, ever,” Novick said.

On the plus side, Redmond has a number of things working in its favor. With the exception of Allegiant’s Las Vegas flights, all the other flights at Redmond carry no more than 74 passengers. That means airlines can quickly unload and clean a plane before boarding passengers.

And it’s rare that poor weather here adds any substantial delays for flights. A new air traffic control radar antenna that went into service this spring also could cut delays when the weather turns bad, since controllers can keep an eye on flights all the way down to the ground on their radar scopes.

Almost all of Horizon’s flights to and from Redmond beat the national average, though the late- evening flights between Redmond and Seattle are late about a quarter of the time, on par with nationwide figures. Across Horizon’s entire network of flights in the last two months, 88 percent of its flights have been on time, according to the FlightStats data. In that same period, SkyWest’s flights nationwide were on schedule 84 percent of the time. Horizon’s record isn’t tracked by the Department of Transportation.

The route with the most consistent track record is between Redmond and Salt Lake City. Those flights, operated by SkyWest under the Delta Connection banner, were on time 96 percent of the time.

And flights between Portland and Redmond, on both SkyWest and Horizon, were almost always right on schedule at least 90 percent of the time. Several of those flights had a perfect record over the last two months and were never more than 10 minutes late on arrival.

The passengers at Redmond Airport on Thursday morning seemed unconcerned with delays, even those getting off a Horizon flight from Los Angeles that was about 20 minutes late.

“I really like this flight,” said Dan Hudson, who visits family in La Pine regularly. The minor delays didn’t bother him.

“They’re pretty much on time,” said Susan Levin, who was there to pick someone up, and regularly flies in and out of Redmond.