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$242+ 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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — STS
jul. 6 — jul. 131
dom. 7/6
dom. 7/13
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 julio 1, 2025.

Round-trip from

$430
(Alaska Airlines)

One-way from

$242
(Alaska Airlines)

Popular in

August

Cheapest in

November

Average price

$653
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. 11% potential increase in price ($81 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 julio 1, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/30. 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.
mar. 9/166:57 pmPHL - STS
2 stops24h 17mAlaska Airlines
mar. 9/233:07 pmSTS - PHL
2 stops11h 55mAlaska Airlines
Deal found 6/30$430
This American Airlines deal was found by Cheapflights users on 6/29. 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.
mar. 7/2910:45 amPHL - STS
1 stop7h 51mAmerican Airlines
mar. 8/194:17 pmSTS - PHL
1 stop10h 08mAmerican Airlines
Deal found 6/29$529

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 julio 1, 2025.
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

mar. 9/16

6:57 pm-4:14 pm

2 stops24h 17m

Santa Rosa Sonoma County

mar. 9/23

3:07 pm-6:02 am

2 stops11h 55m

$430

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

mar. 7/29

10:45 am-3:36 pm

1 stop7h 51m

Santa Rosa Sonoma County

mar. 8/19

4:17 pm-5:25 am

1 stop10h 08m

$529

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

jue. 9/18

6:57 pm-11:59 pm

2 stops32h 02m

$242

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

vie. 8/1

6:46 am-11:40 am

1 stop7h 54m

$405

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

mar. 7/8

6:45 am-1:25 pm

1 stop9h 40m

$469

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

jue. 9/18

6:30 am-11:50 pm

3 stops20h 20m

$579

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

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 $202). Flying from Philadelphia to Santa Rosa in June is currently the most expensive (average of $395). 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 julio 1, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Hawaiian Airlines, and 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,539 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines flying from Philadelphia to Santa Rosa round-trip?

    Alaska Airlines, at $430, was found to be the cheapest airline from Philadelphia to Santa Rosa. An alternate airline flying to your destination would be American Airlines. Alaska Airlines is priced at 34% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Philadelphia to Santa Rosa one-way?

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $242. However, be on the lookout for offers from American Airlines and Hawaiian Airlines, as they are both options that can get you from Philadelphia to Santa Rosa for a low price.

  • 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 $202). Flying from Philadelphia to Santa Rosa in June is currently the most expensive (average of $395). 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 Philadelphia?

Book flights to Philadelphia 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 julio 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$289Average$678FlexibilityNo cancel feeOn-time71%

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