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$237+ Cheap flights from Philadelphia to Santa Rosa (PHL - STS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — STS
Feb 14 — Feb 211
Sat 2/14
Sat 2/21
1 adult, Economy
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Cheap flight deals from Philadelphia to Santa Rosa

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Santa Rosa (STS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 15, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$393
(Alaska Airlines)

One-way from

$237
(Alaska Airlines)

Popular in

December

Cheapest in

March

Average price

$428
Provider with most accurate pricing for Philadelphia-Santa Rosa Sonoma County flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Santa Rosa Sonoma County flights.
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From Philadelphia to Santa Rosa Sonoma County
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One-way flight from Philadelphia to Santa Rosa Sonoma County
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Highest demand for flights based on searches. 7% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Philadelphia to Santa Rosa

Cheapest flights from Philadelphia to Santa Rosa
Explore the most affordable flight options available from Philadelphia to Santa Rosa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 15, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:58 pm
PHL
-
STS
1 stop20h 23m
Alaska Airlines
Wed 4/291:13 pm
STS
-
PHL
1 stop13h 49m
Alaska Airlines
Deal found 1/14$393
This Alaska Airlines deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/246:20 pm
PHL
-
STS
1 stop30h 32m
Alaska Airlines
Sat 2/287:57 pm
STS
-
PHL
1 stop18h 23m
Alaska Airlines
Deal found 1/12$413
This Alaska Airlines deal was found by Cheapflights users on 1/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:47 pm
PHL
-
STS
1 stop18h 43m
Alaska Airlines
Sun 4/56:53 pm
STS
-
PHL
1 stop8h 12m
Alaska Airlines
Deal found 1/13$458
This Alaska Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/57:25 am
PHL
-
STS
1 stop30h 05m
Alaska Airlines
Sat 4/117:02 pm
STS
-
PHL
2 stops32h 03m
Alaska Airlines
Deal found 1/15$486
This American Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/58:38 am
PHL
-
STS
1 stop10h 15m
American Airlines
Sat 4/114:23 pm
STS
-
PHL
1 stop10h 15m
American Airlines
Deal found 1/15$487

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Santa Rosa that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 15, 2026.
Use the filters below to find and compare flights from Philadelphia to Santa Rosa that are best for you.

Fly from

Philadelphia

Fly to

Santa Rosa

Route

Depart

Return

Price

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Fri 4/24

6:58 pm-12:21 pm

1 stop20h 23m

Santa Rosa Sonoma County

Wed 4/29

1:13 pm-6:02 am

1 stop13h 49m

$393

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Tue 2/24

6:20 pm-9:52 pm

1 stop30h 32m

Santa Rosa Sonoma County

Sat 2/28

7:57 pm-5:20 pm

1 stop18h 23m

$413

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Wed 4/1

7:25 am-6:01 pm

1 stop13h 36m

Santa Rosa Sonoma County

Sat 4/4

6:53 pm-6:05 am

1 stop8h 12m

$453

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Wed 4/1

7:25 am-6:01 pm

1 stop13h 36m

Santa Rosa Sonoma County

Sun 4/5

6:53 pm-6:05 am

1 stop8h 12m

$458

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Tue 3/31

6:47 pm-10:30 am

1 stop18h 43m

Santa Rosa Sonoma County

Sun 4/5

6:53 pm-6:05 am

1 stop8h 12m

$458

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Tue 4/14

6:47 pm-10:30 am

1 stop18h 43m

$237

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Wed 4/15

7:25 am-5:10 pm

2 stops12h 45m

$237

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Fri 7/3

9:35 am-3:53 pm

1 stop9h 18m

$250

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Mon 6/15

5:15 pm-11:22 pm

1 stop9h 07m

$250

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Fri 6/26

5:15 pm-11:22 pm

1 stop9h 07m

$250

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 15 results
1
2

Compare providers for flights from Philadelphia to Santa Rosa

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Santa Rosa in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-Santa Rosa flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Philadelphia-Santa Rosa flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Philadelphia-Santa Rosa flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Santa Rosa flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Santa Rosa flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Philadelphia to Santa Rosa

Have a flexible travel schedule? Discover the best time to fly to Santa Rosa from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Philadelphia to Santa Rosa?

Currently, February is the cheapest month in which you can book a flight from Philadelphia to Santa Rosa (average of $71). Flying from Philadelphia to Santa Rosa in May is currently the most expensive (average of $183). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Santa Rosa

Get insights into the airlines that provide service to Santa Rosa. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Santa Rosa. Reviews last updated January 15, 2026.
Peruse reviews from past customers who have flown with American Airlines from Philadelphia to Santa Rosa to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,136 reviews

Boarding

7.5

Food

6.4

Comfort

7.2

Overall

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Anonymous,May 2025

PHL - LHR

A very good flight. They were not as accommodating in relation to the food and beverage options. Last year on the same flight to London, they offered an additional glass of wine beer or vodka. They also offered extra snacks and were constantly checking on us. This flight, they barely acknowledged our presence. They were not rude just not sociable or readily accessible.
American Airlines
7.2
Good
11,136 reviews
American Airlines
7.2
Good
11,136 reviews

Boarding

7.5

Food

6.4

Comfort

7.2

Overall

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Anonymous,May 2025

PHL - LHR

A very good flight. They were not as accommodating in relation to the food and beverage options. Last year on the same flight to London, they offered an additional glass of wine beer or vodka. They also offered extra snacks and were constantly checking on us. This flight, they barely acknowledged our presence. They were not rude just not sociable or readily accessible.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Santa Rosa. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Philadelphia to Santa Rosa?

    Airlines like Alaska Airlines fly from Philadelphia to Santa Rosa in about 20h 23m. The time it takes to get you to your destination can typically vary by up to . The distance from Philadelphia to Santa Rosa is about 2517 mi.

  • What is the cheapest airline to fly from Philadelphia to Santa Rosa round-trip?

    American Airlines, at $289, was found to be the cheapest airline from Philadelphia to Santa Rosa.. American Airlines is priced at 55% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Philadelphia to Santa Rosa that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Santa Rosa flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Santa Rosa?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Santa Rosa.

  • Can I find deals for business class flights from Philadelphia to Santa Rosa?

    Yes. Cheapflights offers flight deals from Philadelphia to Santa Rosa by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, February is the cheapest month in which you can book a flight from Philadelphia to Santa Rosa (average of $71). Flying from Philadelphia to Santa Rosa in May is currently the most expensive (average of $183). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Santa Rosa?

Book flights to Santa Rosa if you plan to visit one of these locations
Fort Bragg
Ukiah

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Alternative routes for Philadelphia to Santa Rosa

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Philadelphia to Santa Rosa

Discover the top airline that operate flights from Philadelphia to Santa Rosa. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$289Average$678FlexibilityNo cancel feeOn-time71%

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