C$152 Cheap Flights from Santa Rosa (STS) to Seattle (SEAA)

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Flight deals from Santa Rosa to Seattle

Looking for a cheap last-minute deal or the best return flight from Santa Rosa Airport to Seattle? If you want to travel next month, return fares start from C$276. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Santa Rosa to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Santa Rosa to Seattle flights are currently cheapest in May.

Which airlines fly from Santa Rosa to Seattle?

Santa Rosa to Seattle: Flight information

The things to know before you go.
Cheapest flight foundC$152
Cheapest month to flyMay
Average flight time2 hrs, 3 mins
Most popular airlineAlaska Airlines
Average flights per week42

Finding cheap flights from Santa Rosa to Seattle: Frequently asked questions

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a return flight from Santa Rosa to Seattle is C$276. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 3 minutes is the average flight time from Santa Rosa to Seattle.
Alaska Airlines, Horizon Air and Qatar Airways fly direct from Santa Rosa to Seattle.
As of April 2026, there are 42 flights per week flying from Santa Rosa to Seattle.
The cheapest month to fly from Santa Rosa to Seattle is usually May.
If you're flying from Santa Rosa Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from C$276.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Santa Rosa Airport to Seattle on Saturday, May 23, 2026.
Yes – the average flight time is 2 hours and 3 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seattle but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.
In April, the average temperature is usually around 8°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.
Currently, Alaska Airlines offers the cheapest flight tickets to Seattle.

Flying from Sonoma County Airport (STS) to Seattle: what you need to know

  • Jump on a direct flight from Sonoma County Airport to Seattle and you'll be in the air for around 2 hours 3 minutes.

  • Santa Rosa (the location of Sonoma County Airport) and Seattle are in the same timezone — UTC-7.

  • Sonoma County Airport (STS) to Seattle-Tacoma International Airport (SEA) is the most popular route, with 11 departures a week to pick from. If you have things to do before heading off, the last flight from STS to SEA is with Alaska Airlines at 18:59. Choose the first departure with Alaska Airlines at 07:00 if you want to fly out earlier.

  • To ensure you get on your flight from STS to Seattle, leave enough time for things like baggage drop and finding your gate. Turning up two hours before international departures and one hour before domestic flights is the general travel rule.

  • Going away during a peak time like October? High seasons (like spring break, summer and New Year) can add another hour at security. Play things extra safe and arrive up to four hours ahead of international flights and two hours before domestic departures.

  • You can book a direct flight from Sonoma County Airport to Seattle. Begin your trip at STS and land at Seattle-Tacoma International Airport (SEA).

  • Take to the skies with Alaska Airlines. This well-known carrier operates direct flights from Sonoma County Airport to Seattle.

  • For a flight within United States, you won't need a passport or visa. However, you'll have to present another form of identification, like an ID card or driver's licence. Once you've booked flight tickets from Sonoma County Airport to Seattle, make sure your ID is up to date.

  • Travelling from central Santa Rosa to STS takes around 36 minutes on public transport. If you drive, ride-share or grab a cab, you'll cover the 13 kilometres in 14 minutes or so, depending on traffic.

  • Want a convenient hotel close to STS? If you're catching an early flight from Sonoma County Airport to Seattle, these accommodation options will have you moments from your departure lounge:

How to find the cheapest flights from Sonoma County Airport (STS) to Seattle

  • C$152 is the lowest price we've seen for a one-way ticket from Sonoma County Airport to Seattle. For a return flight on this route, the best price is C$276. Depending on when you book and the availability, these fares could change.

  • To secure cheap tickets from STS to Seattle, book your trip 9 months before your planned departure.

  • The cheapest month for tickets from Sonoma County Airport to Seattle is May. Compare prices using the 'Whole month' tool and choose the date that offers the best deal.

  • Log into your online account or use the app to create a Price Alert. We'll let you know straight away if there's a better deal on this route. It's simple to do, and it'll save you from looking for cheap tickets from STS to Seattle every day.

  • Play around with the filters to find your ideal journey. To see the 'Cheapest,' 'Fastest' or 'Best' flights from Sonoma County Airport to Seattle, use the 'Sort by' tool. You can also filter results by departure and arrival times, airline, and number of stops.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport (SEA) is around 23 kilometres from the centre of Seattle. With your own car rental or if you take a cab, the drive is about 18 minutes.

  • It takes roughly 54 minutes if you're using public transport.

  • The last thing you need is a lengthy journey to your hotel if you're landing late on a flight from Sonoma County Airport to Seattle. Stay at one of these accommodation options near SEA instead:

Lake Union Sea Plane Base Airport (LKE)

Best time to go to Seattle

  • It's time to pick your trip dates for your flight from Sonoma County Airport to Seattle. July is the busiest month for a trip to Seattle. If you like a more peaceful vibe, go in May.

  • Book your flight from Sonoma County Airport to Seattle for August to experience the city during its warmest month. You can expect temperatures to range from 12ºC to 28ºC.

  • If you like travelling in cooler conditions, lock in a cheap flight from STS to Seattle in February when temperatures average between -1ºC and 11ºC.

More about Seattle

Complete your Seattle trip with a car rental

  • Select one of our car rentals in Seattle and see the sights on your own schedule. Easily compare rates in one go to find the perfect set of wheels once you've booked your hotel and cheap flights from Sonoma County Airport to Seattle.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.