PHL - STS

$202 Find Cheap Flights from Philadelphia to Santa Rosa - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Santa Rosa departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Santa Rosa

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Santa Rosa, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Santa Rosa, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$403
Alaska Airlines
Tue 9/1Sat 9/5
PHL - STS • 1 stop
Cheapest one-way
$202
Alaska Airlines
Wed 10/21
PHL - STS • 1 stop
Top airlines
Alaska Airlines
Cheapest • from $403 (round-trip)
American Airlines
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Philadelphia and Santa Rosa. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Boston (BOS)
Cheapest • Avg $256 (round-trip)
Denver (DEN)
Shortest trip • 7h 30m (one-way)
Insights
Insights
Insights
Insights
When to travel
April
Cheapest • 100% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Santa Rosa!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Santa Rosa that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Santa Rosa

Tue, Sep 1 - Sat, Sep 5
Alaska Airlines Logo
7:02 am - 12:43 pm
PHL
-
STS
8h 41m
1 stop
Alaska Airlines Logo
5:34 pm - 5:40 am
STS
-
PHL
9h 06m
1 stop
$403Alaska Airlines
Wed, Oct 21 - Mon, Oct 26
Alaska Airlines Logo
7:00 am - 1:06 pm
PHL
-
STS
9h 06m
1 stop
Alaska Airlines Logo
5:04 pm - 5:40 am
STS
-
PHL
9h 36m
1 stop
$426Alaska Airlines
Mon, Oct 26 - Thu, Oct 29
Delta Logo
6:40 am - 4:08 pm
PHL
-
STS
12h 28m
2 stops
Delta Logo
4:50 pm - 11:00 am
STS
-
PHL
15h 10m
2 stops
$439Delta
Tue, Sep 15 - Wed, Sep 23
Alaska Airlines Logo
7:00 am - 6:07 pm
PHL
-
STS
14h 07m
2 stops
Alaska Airlines Logo
5:34 pm - 5:40 am
STS
-
PHL
9h 06m
1 stop
$449Alaska Airlines
Wed, Oct 7 - Sun, Oct 11
Alaska Airlines Logo
7:00 am - 1:06 pm
PHL
-
STS
9h 06m
1 stop
Alaska Airlines Logo
7:00 am - 5:40 am
STS
-
PHL
19h 40m
1 stop
$457Alaska Airlines
Sat, Oct 3 - Wed, Oct 7
American Airlines Logo
5:00 am - 12:09 pm
PHL
-
STS
10h 09m
1 stop
American Airlines Logo
4:20 pm - 5:35 am
STS
-
PHL
10h 15m
1 stop
$458American Airlines
Fri, Oct 23 - Tue, Oct 27
Alaska Airlines Logo
6:39 pm - 1:06 pm
PHL
-
STS
21h 27m
1 stop
Alaska Airlines Logo
5:04 pm - 5:40 am
STS
-
PHL
9h 36m
1 stop
$459Alaska Airlines
Sat, Oct 3 - Wed, Oct 7
American Airlines Logo
7:00 am - 3:50 pm
PHL
-
STS
11h 50m
2 stops
American Airlines Logo
4:23 pm - 5:26 am
STS
-
PHL
10h 03m
1 stop
$463American Airlines
Mon, Sep 14 - Wed, Sep 23
Alaska Airlines Logo
7:00 am - 12:46 pm
PHL
-
STS
8h 46m
1 stop
Alaska Airlines Logo
5:34 pm - 5:40 am
STS
-
PHL
9h 06m
1 stop
$471Alaska Airlines
Wed, Oct 21 - Wed, Oct 28
Alaska Airlines Logo
7:00 am - 4:55 pm
PHL
-
STS
12h 55m
2 stops
Alaska Airlines Logo
5:04 pm - 5:40 am
STS
-
PHL
9h 36m
1 stop
$474Alaska Airlines
Booking Insights

KAYAK's insights & trends for Philadelphia to Santa Rosa flights

Get data-powered insights and trends into flights from Philadelphia to Santa Rosa to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Philadelphia to Santa Rosa?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Santa Rosa, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to Santa Rosa is April, where tickets cost $0 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,088 and $854 respectively.

Find deals

Good to know

Low seasonMarch
Cheapest flight$202
Best time to beat the crowds with an average 62% drop in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from Philadelphia to Santa Rosa

When to book flights from Philadelphia to Santa Rosa

Are your dates flexible? Find out the best times to travel from Philadelphia to Santa Rosa based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Santa Rosa

  • What is the cheapest flight from Philadelphia to Santa Rosa?

    In the last 5 days, the lowest price for a flight from Philadelphia to Santa Rosa was $202 for a one-way ticket and $403 for a round-trip.

  • Do I need a passport to fly between Philadelphia and Santa Rosa?

    No, a passport isn't needed to fly from Philadelphia to Santa Rosa. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Philadelphia to Santa Rosa?

    Philadelphia and Santa Rosa are both served by 1 main airport. You will leave Philadelphia from Philadelphia and will be arriving at Santa Rosa Sonoma County.

  • Which aircraft models fly most regularly from Philadelphia to Santa Rosa?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Philadelphia to Santa Rosa?

    oneworld is the only airline alliance operating flights between Philadelphia and Santa Rosa.

  • How does KAYAK find such low prices on flights from Philadelphia to Santa Rosa?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Santa Rosa.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Santa Rosa?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Santa Rosa from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Santa Rosa?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Santa Rosa with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and STS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Santa Rosa?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Santa Rosa from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Philadelphia to Santa Rosa

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Santa Rosa. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Santa Rosa? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11768 reviews
7.5Boarding
7.2Comfort
6.8Entertainment
6.4Food
7.9Crew
Airline reviews

They are always late and seats was also not having working charger

6.0 GoodDheeraj, Feb 2026
PHL - LAX
Read more American Airlines reviews

They are always late and seats was also not having working charger

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

Did not get the seat I selected and paid for.

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

One bottle of water and a package of cookies for comfort plus. We had to literally beg a flight attendant for an extra bottle of water later in the flight due to feeling dehydrated.

For coast to coast travel the A321 and even the NEO, even in first class will never be excellent. That would take a B787 or 777 to accomplish.

I was unhappy with having the seat I chose changed at the last minute. I was moved to an aisle seat which did not recline and was next to the bathroom. The bathroom odors made the flight entirely unpleasant. Having carefully chosen my seat months before I was not pleased with my AA experience. In addition, they ran out of tea during flight service, really?

There were delays on both ends. It made it less than excellent. This plane was great though

Attendants were rude. Scowling. Seats were miserable and we paid extra.

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

Everything you need to know for your flight from Philadelphia to Santa Rosa

Information on your arrival and departure airports

Philadelphia (PHL)
Santa Rosa (STS)