PHL - STS

$237 Find Cheap Flights from Philadelphia to Santa Rosa

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 9/9. 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

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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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

Fri, Sep 12 - Wed, Sep 24
Alaska Airlines Logo
6:57 pm - 8:23 pmPHL-STS
28h 26m1 stop
Alaska Airlines Logo
7:00 am - 6:02 amSTS-PHL
20h 02m1 stop
$422Alaska Airlines
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Fri, Sep 19 - Sat, Sep 27
Hawaiian Airlines Logo
6:57 pm - 8:23 pmPHL-STS
28h 26m1 stop
Hawaiian Airlines Logo
7:00 am - 6:02 amSTS-PHL
20h 02m1 stop
$423Hawaiian Airlines
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Fri, Sep 12 - Thu, Sep 25
Alaska Airlines Logo
6:57 pm - 1:36 pmPHL-STS
21h 39m1 stop
Alaska Airlines Logo
2:28 pm - 6:02 amSTS-PHL
12h 34m1 stop
$432Alaska Airlines
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Tue, Sep 16 - Tue, Sep 23
Alaska Airlines Logo
7:22 am - 7:12 pmPHL-STS
14h 50m2 stops
Alaska Airlines Logo
7:03 am - 6:02 amSTS-PHL
19h 59m2 stops
$460Alaska Airlines
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Wed, Sep 10 - Tue, Sep 23
Alaska Airlines Logo
6:57 pm - 8:23 pmPHL-STS
28h 26m1 stop
Alaska Airlines Logo
7:00 am - 6:02 amSTS-PHL
20h 02m1 stop
$462Alaska Airlines
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Sat, Sep 13 - Tue, Sep 23
Alaska Airlines Logo
7:22 am - 1:36 pmPHL-STS
9h 14m1 stop
Alaska Airlines Logo
7:03 am - 6:02 amSTS-PHL
19h 59m2 stops
$463Alaska Airlines
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Wed, Sep 10 - Thu, Sep 25
Alaska Airlines Logo
6:57 pm - 8:23 pmPHL-STS
28h 26m1 stop
Alaska Airlines Logo
2:28 pm - 6:02 amSTS-PHL
12h 34m1 stop
$472Alaska Airlines
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Fri, Jan 9 - Mon, Jan 12
American Airlines Logo
6:40 pm - 12:28 pmPHL-STS
20h 48m1 stop
American Airlines Logo
12:45 pm - 6:06 amSTS-PHL
14h 21m1 stop
$546American Airlines
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Fri, Sep 19 - Sat, Sep 27
Logo
7:22 am - 11:50 pmPHL-STS
19h 28m2 stops
Logo
6:00 am - 6:02 amSTS-PHL
21h 02m2 stops
$673
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Fri, Sep 19 - Sat, Sep 27
American Airlines Logo
8:20 am - 3:48 pmPHL-STS
10h 28m2 stops
American Airlines Logo
1:00 pm - 1:10 amSTS-PHL
9h 10m2 stops
$694American Airlines
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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’s the cheapest day of the week to fly from Philadelphia to Santa Rosa?

The average price of all round-trip flights from Philadelphia to Santa Rosa clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Santa Rosa on a Saturday and more expensive on a Wednesday. On your return trip to Philadelphia, you should consider flying back on a Tuesday, and avoid Fridays for better deals.

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Good to know

Low seasonNovember
Cheapest flight$237
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly and prices are also 0% 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 3 days, the lowest price for a flight from Philadelphia to Santa Rosa was $237 for a one-way ticket and $422 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.
7.2
American AirlinesOverall score based on 10000 reviews
7.5Boarding
6.9Entertainment
7.2Comfort
6.5Food
8.0Crew
Airline reviews

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

2.0 MediocreAnonymous, Aug 2025PHL - TYS
Read more American Airlines reviews

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

Flight was delayed and after being in the airport for like seven hours, it was canceled.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

Overall very good, only complaint I have is the crew from CLT to SAT could have collected trash sooner.

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

We started with trouble checking in 24 hours early. Then my husband did not get his TSA precheck. Finally flight delayed due to no crew. I know things happen

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

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.

It’s a great flight. Service is good. Staff is awesome.

Everything about the flight was lovely…We left early, arrived early, cabin crew were efficient and helpful. Flight was easy and most pleasant.

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)

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