Cheap flights from Portland to San Luis Obispo from $109

In general, September is the cheapest month to fly from Portland to San Luis Obispo. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $260. The month of December is another great option to travel to San Luis Obispo, with average flight prices from Portland averaging around $277.

On average, the least expensive day to fly to San Luis Obispo from Portland is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $286. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Portland to San Luis Obispo for around $377.

Flying to San Luis Obispo from Portland at noon is the least expensive time of day to depart. momondo users have found prices as low as $320 when looking at flights departing at noon. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $411 on average. Flights to San Luis Obispo from Portland in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Portland to San Luis Obispo County for the best Portland - San Luis Obispo County flight prices

You are more likely to see cheaper flights to San Luis Obispo from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to San Luis Obispo for around $338 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Luis Obispo from Portland for as low as $198 on momondo.

There are 2 cabin classes available to choose from on Portland to San Luis Obispo County flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 25% on your flight if you consider stops on a Portland to San Luis Obispo flight.

As of February 2026, prices for Portland to San Luis Obispo flights are approximately 80% more expensive when compared to flights at the same time last year.

Alaska Airlines and United Airlines are the most popular carriers operating from Portland to San Luis Obispo County

Alaska Airlines, United Airlines and Southwest are the top three most popular airlines that fly to San Luis Obispo from Portland according to our data. Alaska Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to San Luis Obispo. Keep in mind that there are 5 different airlines that fly to San Luis Obispo on a routine basis, so you have a few additional options to choose from.

1 flights are operational daily from Portland to San Luis Obispo as of February 2026. The most popular departure time for this route is 2:00PM, with 100% of flights per day taking off in the afternoon.

The number of flights available between Portland and San Luis Obispo is 12 per week as of February 2026. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.