$98 Cheap Flights from Portland (PDX) to Santa Rosa (STS)

Popular airlines from Portland International Airport (PDX) to Santa Rosa, CA (STS-Sonoma County)

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Cheap Flights from Portland to Santa Rosa (PDX-STS)

Prices were available within the past 7 days and start at $98 for one-way flights and $177 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Hawaiian Airlines
Hawaiian Airlines
Alaska Airlines
Alaska Airlines
Alaska Airlines
Alaska Airlines
Alaska Airlines
Alaska Airlines
American Airlines

Find the cheapest month to fly from Portland (PDX) to Santa Rosa (STS)

February is typically the cheapest month to fly

From $145 - $362 per traveler.

Graph displaying average flight prices per month

Alternative airports near Santa Rosa

Prices were available within the past 7 days. Prices and availability are subject to change.

Flights from Portland (PDX) to Santa Rosa (STS)
Origin airport
Portland Intl.
Destination airport
Sonoma County
Airlines serving
Alaska Airlines, American Airlines, Hawaiian Airlines
Roundtrip price
$176
Distance
489 mi
Average flight time
1 hour 38 mins

Portland to Santa Rosa Flights

The cheapest times to fly from Portland to Santa Rosa

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Portland to Santa Rosa are during the month of September. You can find some of the cheapest flights from Portland to Santa Rosa with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to Santa Rosa

Sunday is one of the best days to book for cheap flights from Portland to Santa Rosa: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Portland to Santa Rosa

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Portland to Santa Rosa in 2025. You can also book with separate airlines for your outbound and return journeys, from $98 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Portland to Santa Rosa flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Portland to Santa Rosa airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Sonoma County Airport (STS) cost?
Grab cheap return tickets starting at $157 from Portland Intl. Airport (PDX) to Sonoma County Airport (STS). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Alaska Airlines flight leaving PDX on August 14 2025 and touching down at STS. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from PDX to STS?
The cheapest flights from PDX to STS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Portland Intl. Airport (PDX) to Sonoma County Airport (STS)?
When heading out of Portland Intl. Airport (PDX), you can hop on a direct flight to Sonoma County Airport (STS) with Alaska Airlines.
What is the cheapest airline that flies from PDX to STS?
With fares starting at $99 for a one-way flight from PDX to STS, Alaska Airlines is currently the cheapest carrier flying this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from PDX on October 18 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Portland Intl. Airport (PDX) to Sonoma County Airport (STS)?
On average, only 1 direct flight departs daily from Portland Intl. Airport (PDX) to Sonoma County Airport (STS). Need more options? Use Expedia's filter tool to discover flights with layovers and explore a new city along the way.
What are the most popular departure times for flights from Portland Intl. Airport (PDX) to Sonoma County Airport (STS)?
More passengers fly between PDX and STS at 7 AM than at any other time. Rather go when it's quieter? Pick a flight outside the busiest times and you could save on your ticket as well.
What day of the week has the most flights from PDX to STS?
Friday offers the most flights from Portland Intl. Airport (PDX) to Sonoma County Airport (STS). Consider taking off on this day and you'll have a greater chance of finding a departure that works with your plans.
What is the earliest flight from Portland Intl. Airport (PDX) to Sonoma County Airport (STS)?
The earliest flight jetting off from Portland Intl. Airport (PDX) is at around 7:44AM UTC-8. Hop on this flight and you'll land at Sonoma County Airport (STS) at approximately 9:21AM UTC-8. The total travel time is 1h 37m.
How long does it take to fly from Portland Intl. Airport (PDX) to Sonoma County Airport (STS)?
It takes roughly 1 hour and 37 minutes to fly the 490 mi from PDX to STS.
What airline has the least delays from PDX to STS?
Alaska Airlines has the best performance for on-time direct flights from Portland Intl. Airport (PDX) to Sonoma County Airport (STS), with an on-time score of 84%. Use the Expedia App to view your journey status before you head off and receive notifications about any trip changes.
What is the best time to fly from Portland Intl. Airport (PDX) to Sonoma County Airport (STS)?
To avoid potential delays on the Portland Intl. Airport (PDX) to Sonoma County Airport (STS) route, fly before 3 PM. Departures after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Santa Rosa from Portland Intl. Airport (PDX)?
You can land at any one of these Santa Rosa airports after your direct flight from Portland Intl. Airport (PDX):

  • San Francisco Intl. Airport (SFO)
  • Oakland Intl. Airport (OAK)
  • Sonoma County Airport (STS)

Is it cheaper to buy a plane ticket from Portland Intl. Airport (PDX) to Sonoma County Airport (STS) last-minute?
Holding off until just before your trip to book a flight from PDX to STS often results in higher prices. While you may come across some last-minute offers, they aren't always guaranteed. Be flexible with your travel plans for a better chance of scoring a bargain.
Is it cheaper to book a PDX to STS flight and hotel package?
Compared with arranging flights and hotels separately, booking a PDX to STS flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one place takes the hassle out of planning your trip. Simply pick your flights and choose from our extensive range of hotels, then personalize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Sonoma County Airport (STS)?
In most instances, you're able to reschedule or cancel your PDX to STS flight. However, additional fees may apply, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want more details, head to our Customer Service portal.

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