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$207 Cheap Flights from Philadelphia (PHL) to Santa Rosa (STS)

View $207 flight on Wed, Dec 2, 2026Opens in a new window

Popular airlines from Philadelphia Intl. Airport (PHL) to Santa Rosa, CA (STS-Sonoma County)

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Cheap Flights from Philadelphia to Santa Rosa (PHL-STS)

Prices were available within the past 7 days and start at $207 for one-way flights and $411 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bargain Flight
Tue, Sep 29 - Tue, Oct 6
PHL
Philadelphia
STS
Santa Rosa
$411 Roundtrip, found 4 days ago
$411
Roundtrip
found 4 days ago
Select Bargain Flight flight, departing Tue, Sep 29 from Philadelphia to Santa Rosa, returning Tue, Oct 6, priced at $411 found 4 days ago
Bargain Flight
Sat, Oct 31 - Tue, Nov 3
PHL
Philadelphia
STS
Santa Rosa
$412 Roundtrip, found 1 day ago
$412
Roundtrip
found 1 day ago
Select Bargain Flight flight, departing Sat, Oct 31 from Philadelphia to Santa Rosa, returning Tue, Nov 3, priced at $412 found 1 day ago
Southwest Airlines
Sat, Mar 20 - Wed, Mar 24
PHL
Philadelphia
STS
Santa Rosa
$413 Roundtrip, found 1 day ago
$413
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Sat, Mar 20 from Philadelphia to Santa Rosa, returning Wed, Mar 24, priced at $413 found 1 day ago
American Airlines
Tue, Jan 12 - Sat, Jan 16
PHL
Philadelphia
STS
Santa Rosa
$413 Roundtrip, found 8 hours ago
$413
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Tue, Jan 12 from Philadelphia to Santa Rosa, returning Sat, Jan 16, priced at $413 found 8 hours ago
Bargain Flight
Sat, Sep 26 - Sat, Sep 26
PHL
Philadelphia
STS
Santa Rosa
$413 Roundtrip, found 4 days ago
$413
Roundtrip
found 4 days ago
Select Bargain Flight flight, departing Sat, Sep 26 from Philadelphia to Santa Rosa, returning Sat, Sep 26, priced at $413 found 4 days ago
Bargain Flight
Sat, Oct 10 - Thu, Oct 15
PHL
Philadelphia
STS
Santa Rosa
$417 Roundtrip, found 2 days ago
$417
Roundtrip
found 2 days ago
Select Bargain Flight flight, departing Sat, Oct 10 from Philadelphia to Santa Rosa, returning Thu, Oct 15, priced at $417 found 2 days ago
Alaska Airlines
Tue, Oct 13 - Thu, Oct 15
PHL
Philadelphia
STS
Santa Rosa
$418 Roundtrip, found 1 day ago
$418
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Oct 13 from Philadelphia to Santa Rosa, returning Thu, Oct 15, priced at $418 found 1 day ago
Southwest Airlines
Tue, Jan 12 - Sat, Jan 16
PHL
Philadelphia
STS
Santa Rosa
$418 Roundtrip, found 8 hours ago
$418
Roundtrip
found 8 hours ago
Select Southwest Airlines flight, departing Tue, Jan 12 from Philadelphia to Santa Rosa, returning Sat, Jan 16, priced at $418 found 8 hours ago
Delta
Tue, Jan 12 - Sat, Jan 16
PHL
Philadelphia
STS
Santa Rosa
$423 Roundtrip, found 8 hours ago
$423
Roundtrip
found 8 hours ago
Select Delta flight, departing Tue, Jan 12 from Philadelphia to Santa Rosa, returning Sat, Jan 16, priced at $423 found 8 hours ago
Southwest Airlines
Tue, Jan 12 - Sat, Jan 16
PHL
Philadelphia
STS
Santa Rosa
$423 Roundtrip, found 8 hours ago
$423
Roundtrip
found 8 hours ago
Select Southwest Airlines flight, departing Tue, Jan 12 from Philadelphia to Santa Rosa, returning Sat, Jan 16, priced at $423 found 8 hours ago

Alternative airports near Santa Rosa

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

Select flight to Sonoma County STS. Cheapest and Closest option available. Average driving time to city center is 10 minutes. Flights from $660
STS
Sonoma County
CheapestClosest
Average driving time to city center10 min
Flights from $660

What you need to know for your flight from Philadelphia Intl. to Sonoma County

Philadelphia (PHL) to Santa Rosa (STS) at a glance

Travel between Philadelphia (PHL) and Santa Rosa (STS) with a range of airlines on this domestic long-haul route. Evaluate both full-service and budget carriers to discover the itinerary that aligns with your budget, schedule, and travel goals while you delve into Santa Rosa's renowned attractions and neighborhoods. Get essential information about flights departing from Philadelphia International Airport (PHL) to Sonoma County Airport (STS).

  • Fastest flight duration: around 7h 30m in-flight, plus roughly 55 minutes layover with one stop
  • Route distance: roughly 2,500 miles (4,020 km)
  • Flights per week: around 7 departures on average
  • Typical fares (one-way): economy tickets often range from $205–$565, depending on seasonality and how far ahead you book

Flights from Philadelphia International Airport (PHL) to Sonoma County Airport (STS)

According to recent traveler bookings, the top airlines flying from Philadelphia to Santa Rosa are favored for one-stop and multi-stop flights, often featuring convenient layovers at Sky Harbor International Airport (PHX, approximately 50 minutes) and Seattle-Tacoma International Airport (SEA, around 1 hour 15 minutes). This variety allows you to customize your journey by balancing price, total travel time, and cabin class to secure the best travel itinerary.

  • American Airlines: This major carrier provides full-service one-stop options, with one-way ticket prices generally ranging from $205 to $970. It dominates the route, responsible for about 78% of departures, featuring an in-flight duration of 7 hours and 30 minutes and a total travel time of around 8 hours and 45 minutes, including the layover.
  • Alaska Airlines: Another full-service option, Alaska Airlines offers one-stop flights with one-way fares typically between $205 and $495. It accounts for approximately 12% of the departures on this route, with the same in-flight time of 7 hours and 30 minutes and a total journey time of roughly 8 hours and 45 minutes, factoring in the layover.

Alternative routes from Philadelphia (PHL) to Santa Rosa (STS)

  • Wilmington to Santa Rosa (ILG-STS): New Castle Airport (ILG) is located approximately 24 miles from Philadelphia International Airport (PHL).
  • Philadelphia to Novato (PHL-NOT): Gnoss Field Airport (NOT) lies around 29 miles from Sonoma County Airport (STS).
  • Philadelphia to Napa (PHL-APC): Napa Valley Airport (APC) is about 35 miles distant from Sonoma County Airport (STS).

How to find the best prices for flights from Philadelphia (PHL) to Santa Rosa (STS)

Getting some of the best deals on flights from Philadelphia to Santa Rosa is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking within two weeks, although most travelers tend to book two to eight weeks in advance. Departures in the morning (5 a.m. to 12 p.m.) often offer lower prices and are the most sought-after flight times. Additionally, flying on Wednesday typically results in cheaper fares, while Saturday remains the most popular travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find Santa Rosa hotel and flight deals.
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Sonoma County Airport from Philadelphia International Airport

Santa Rosa welcomes travelers from Philadelphia with a range of transport options based on price, convenience, and proximity. Santa Rosa city center is approximately a 10-minute drive (covering about 9 miles) from Sonoma County Airport, depending on traffic. Here's how to reach Santa Rosa efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Santa Rosa, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from Sonoma County Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Sonoma County Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Sonoma County Airport, Santa Rosa Station, a train station, is located about 7.6 miles away by car, offering convenient access for travelers seeking rail connections.

Frequently asked questions

How much does a flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County) cost?
You can find cheap one-way flights from $207 and cheap return flights from $411 Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County) with Expedia. One-way flights typically cost between $271 and $1636, and return flights often range between $582 and $1492. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The cheapest month to fly from PHL to STS is September when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County)?
Enter PHL to STS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County)?
American Airlines is one of the cheapest airlines offering connecting flights from Philadelphia, PA (PHL) to Santa Rosa, CA (STS) with a layover in Los Angeles Intl. (LAX), starting from around $438. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County)?
To find a cheap flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The earliest flight from Philadelphia, PA (PHL) to Santa Rosa, CA (STS) typically leaves at around 5:00 AM, operated by American Airlines. An early start like this allows you to arrive in Santa Rosa with plenty of time to explore. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The most popular departure times for flights from Philadelphia (PHL) to Santa Rosa (STS) are in the early morning, from 6am to 9am. About 53% of passengers prefer this time window. United Airlines and Delta Airlines offer flights during this window. This timing works well because it allows you to start your day early and enjoy Santa Rosa upon arrival.
How long does it take to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County)?
A flight from PHL to STS with a layover takes around 8 hours 20 minutes, with the route covering approximately 2,518 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County)?
First class seats are offered on the PHL to STS route with American Airlines.
How do I earn miles on a Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County) flight with Expedia?
It's easy to earn miles on a Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Santa Rosa from Philadelphia Intl. (PHL)?
From Philadelphia Intl. (PHL), you can fly into Sonoma County (STS) to reach Santa Rosa. Some flights may connect through major hubs like Denver Intl. (DEN), O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL) before reaching Santa Rosa. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County) at the last minute?
Typically, booking a last minute flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County) flight and hotel package?
Securing a Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County)?
If you booked your Philadelphia, PA (PHL-Philadelphia Intl.) to Santa Rosa, CA (STS-Sonoma County) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Philadelphia Intl.
Destination airport
Sonoma County
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines
Roundtrip price
$411
Distance
2518 mi

Book with confidence

Philadelphia to Santa Rosa Flights

The cheapest times to fly from Philadelphia 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 Philadelphia to Santa Rosa are during the month of September. You can find some of the cheapest flights from Philadelphia to Santa Rosa with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Philadelphia 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 Philadelphia 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 Philadelphia to Santa Rosa in 2026. You can also book with separate airlines for your outbound and return journeys, from $207 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 Philadelphia 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 Philadelphia 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.

 

Philadelphia to Santa Rosa Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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