Cheap flights from San Luis Obispo to Seattle from $159

In general, February is the cheapest month to fly from San Luis Obispo to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $287. If you don’t want to visit Seattle in February, then you should wait until May to fly from San Luis Obispo, when ticket prices are also cheap, with an average price of $300.

On average, the least expensive day to fly to Seattle from San Luis Obispo is on a Friday. momondo users have found tickets for Friday departures for as low as $397. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from San Luis Obispo because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $622.

Flying to Seattle from San Luis Obispo in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $405 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the morning, with an average ticket price of $523. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from San Luis Obispo County to Seattle/Tacoma Intl for the best San Luis Obispo County - Seattle/Tacoma Intl flight prices

You are more likely to see cheaper flights to Seattle from San Luis Obispo when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $385 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from San Luis Obispo for as low as $278 on momondo.

There are 4 cabin classes available to choose from on San Luis Obispo to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between San Luis Obispo to Seattle.

As of October 2026, prices for San Luis Obispo to Seattle flights are approximately 82% more expensive when compared to flights at the same time last year.

Alaska Airlines and United Airlines are the most popular carriers operating from San Luis Obispo County to Seattle/Tacoma Intl

Alaska Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Seattle from San Luis Obispo according to our data. Alaska Airlines is the first choice among our users, with 74% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 4 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

San Diego (SAN) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via San Diego (SAN) offer the lowest average round-trip price of $173.

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 4h 13m.

San Francisco (SFO) has the shortest average layover time for this route: 0h 52m.

3 flights are operational daily from San Luis Obispo to Seattle as of October 2026. The most popular departure time for this route is 10:00AM, with 50% of flights per day taking off at noon.

As of October 2026, there are 25 flights per week flying from San Luis Obispo to Seattle. The most common day of the week flights depart is Wed, with 16% of flights taking off on this day.