$109 Cheap Flights from Santa Rosa (STS) to Portland (PDX)

View $109 flight on Tue, Aug 12, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $109 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
Tue, Aug 12 - Tue, Aug 19
STS
Santa Rosa
PDX
Portland
$177 Roundtrip, found 2 hours ago
$177
Roundtrip
found 2 hours ago
Select Hawaiian Airlines flight, departing Tue, Aug 12 from Santa Rosa to Portland, returning Tue, Aug 19, priced at $177 found 2 hours ago
Alaska Airlines
Fri, Aug 15 - Tue, Aug 19
STS
Santa Rosa
PDX
Portland
$187 Roundtrip, found 2 hours ago
$187
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Fri, Aug 15 from Santa Rosa to Portland, returning Tue, Aug 19, priced at $187 found 2 hours ago
Alaska Airlines
Tue, Aug 12 - Tue, Aug 19
STS
Santa Rosa
PDX
Portland
$197 Roundtrip, just found
$197
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Aug 12 from Santa Rosa to Portland, returning Tue, Aug 19, priced at $197 just found
Hawaiian Airlines
Tue, Aug 12 - Sat, Aug 16
STS
Santa Rosa
PDX
Portland
$207 Roundtrip, found 2 hours ago
$207
Roundtrip
found 2 hours ago
Select Hawaiian Airlines flight, departing Tue, Aug 12 from Santa Rosa to Portland, returning Sat, Aug 16, priced at $207 found 2 hours ago
Alaska Airlines
Fri, Aug 15 - Tue, Aug 19
STS
Santa Rosa
PDX
Portland
$207 Roundtrip, found 2 hours ago
$207
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Fri, Aug 15 from Santa Rosa to Portland, returning Tue, Aug 19, priced at $207 found 2 hours ago
Hawaiian Airlines
Thu, Aug 14 - Tue, Aug 19
STS
Santa Rosa
PDX
Portland
$217 Roundtrip, found 2 hours ago
$217
Roundtrip
found 2 hours ago
Select Hawaiian Airlines flight, departing Thu, Aug 14 from Santa Rosa to Portland, returning Tue, Aug 19, priced at $217 found 2 hours ago
Alaska Airlines
Tue, Aug 12 - Wed, Aug 13
STS
Santa Rosa
PDX
Portland
$217 Roundtrip, just found
$217
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Aug 12 from Santa Rosa to Portland, returning Wed, Aug 13, priced at $217 just found
Alaska Airlines
Tue, Aug 5 - Wed, Aug 13
STS
Santa Rosa
PDX
Portland
$227 Roundtrip, found 3 hours ago
$227
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Tue, Aug 5 from Santa Rosa to Portland, returning Wed, Aug 13, priced at $227 found 3 hours ago
Alaska Airlines
Fri, Aug 15 - Tue, Aug 19
STS
Santa Rosa
PDX
Portland
$230 Roundtrip, found 2 hours ago
$230
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Fri, Aug 15 from Santa Rosa to Portland, returning Tue, Aug 19, priced at $230 found 2 hours ago
American Airlines
Thu, Aug 14 - Tue, Aug 19
STS
Santa Rosa
PDX
Portland
$444 Roundtrip, found 4 days ago
$444
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Aug 14 from Santa Rosa to Portland, returning Tue, Aug 19, priced at $444 found 4 days ago

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

January is typically the cheapest month to fly

From $146 - $315 per traveler.

Graph displaying average flight prices per month

Flights from Santa Rosa (STS) to Portland (PDX)
Origin airport
Sonoma County
Destination airport
Portland Intl.
Airlines serving
Alaska Airlines, American Airlines, Hawaiian Airlines
Roundtrip price
$176
Distance
489 mi
Average flight time
1 hour 37 mins

Santa Rosa to Portland Flights

The cheapest times to fly from Santa Rosa to Portland

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 Santa Rosa to Portland are during the month of August. You can find some of the cheapest flights from Santa Rosa to Portland with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Santa Rosa to Portland: 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 Santa Rosa to Portland

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 Santa Rosa to Portland in 2025. You can also book with separate airlines for your outbound and return journeys, from $109 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 Santa Rosa to Portland 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 Santa Rosa to Portland 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 Sonoma County Airport (STS) to Portland Intl. Airport (PDX) cost?
You can book cheap return fares starting from $176 from Sonoma County Airport (STS) to Portland Intl. Airport (PDX). 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 STS on August 7 2025 and touching down at PDX. The price was last updated on July 14 2025 and has not changed since.
What is the cheapest month to fly from STS to PDX?
To lock in a cheap fare, search for direct flights from STS to PDX leaving in November. You can find a one-way Alaska Airlines flight for $109 leaving on November 18 2025. This price is based on the cheapest direct flight found on Expedia for this route in the next 330 days. The price was last updated on July 14 2025 and remains unchanged.
Which airlines fly direct from Sonoma County Airport (STS) to Portland Intl. Airport (PDX)?
If you're departing from Sonoma County Airport (STS), you can jump on a direct flight to Portland Intl. Airport (PDX) with Alaska Airlines.
What is the cheapest airline that flies from STS to PDX?
With fares starting at $109 for a one-way flight from STS to PDX, Alaska Airlines is currently the cheapest airline 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 STS on October 8 2025. Prices were last updated on July 14 2025 and have not changed since.
How many flights per day from Sonoma County Airport (STS) to Portland Intl. Airport (PDX)?
On average, there is just 1 nonstop flight operating from Sonoma County Airport (STS) to Portland Intl. Airport (PDX) every day. If this doesn't work for you, think about flights with layovers. Simply filter your search results on Expedia to include one stop or more to find a better alternative.
What are the most popular departure times for flights from Sonoma County Airport (STS) to Portland Intl. Airport (PDX)?
Flights between STS and PDX are their busiest at 11 AM. If you want a less crowded experience and possibly cheaper prices, choose a departure outside the usual busy windows.
What day of the week has the most flights from STS to PDX?
Jet off on a Friday if you're searching for the best choice of flights from Sonoma County Airport (STS) to Portland Intl. Airport (PDX).
What is the earliest flight from Sonoma County Airport (STS) to Portland Intl. Airport (PDX)?
The earliest flight out of Sonoma County Airport (STS) is at around 11:12AM UTC-8. Hop on this flight and you'll reach Portland Intl. Airport (PDX) at approximately 12:45PM UTC-8. The total travel time is 1h 33m.
How long does it take to fly from Sonoma County Airport (STS) to Portland Intl. Airport (PDX)?
The average flight time from STS to PDX is 1 hour and 33 minutes, covering a total distance of 490 mi.
What airline has the least delays from STS to PDX?
Consider traveling with Alaska Airlines if you'd like to go straight from Sonoma County Airport (STS) to Portland Intl. Airport (PDX) without any interruptions. This carrier has the strongest track record for punctuality, with an on-time score of 81%. Want real-time updates? You can keep an eye on your flight status using the Expedia App.
What is the best time to fly from Sonoma County Airport (STS) to Portland Intl. Airport (PDX)?
To avoid possible delays on the Sonoma County Airport (STS) to Portland Intl. Airport (PDX) route, aim to travel before 3 PM. Flights after this time have a 22% higher chance of being 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 Portland from Sonoma County Airport (STS)?
If you're flying on a direct flight from Sonoma County Airport (STS) to Portland, Portland Intl. Airport (PDX) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Sonoma County Airport (STS) to Portland Intl. Airport (PDX) last-minute?
Booking your plane ticket from STS to PDX just before your journey is generally more expensive. However, if there's some wiggle room with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a STS to PDX flight and hotel package?
You'll generally save money by booking a STS to PDX flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After choosing your ideal flights and accommodations, consider adding extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Sonoma County Airport (STS) to Portland Intl. Airport (PDX)?
If you booked your STS to PDX flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

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