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$293+ 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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — STS
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 September 16, 2025.

Round-trip from

$382
(Alaska Airlines)

One-way from

$293
(Hawaiian Airlines)

Popular in

September

Cheapest in

January

Average price

$918
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. 10% potential increase in price ($84 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 16, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/227:00 amPHL - STS
1 stop9h 36mAlaska Airlines
Tue 10/282:22 pmSTS - PHL
1 stop24h 50mAlaska Airlines
Deal found 9/15$382
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 11/87:02 amPHL - STS
1 stop18h 03mAlaska Airlines
Fri 11/142:22 pmSTS - PHL
1 stop24h 50mAlaska Airlines
Deal found 9/15$402
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 11/97:02 amPHL - STS
1 stop9h 24mAlaska Airlines
Fri 11/142:22 pmSTS - PHL
1 stop24h 50mAlaska Airlines
Deal found 9/15$422
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 11/87:12 pmPHL - STS
1 stop21h 14mAlaska Airlines
Sat 11/157:00 amSTS - PHL
1 stop19h 42mAlaska Airlines
Deal found 9/15$442
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 12/36:54 pmPHL - STS
2 stops25h 25mAlaska Airlines
Sun 12/72:21 pmSTS - PHL
1 stop12h 25mAlaska Airlines
Deal found 9/14$444
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 11/77:02 amPHL - STS
1 stop9h 24mAlaska Airlines
Sat 11/152:22 pmSTS - PHL
1 stop24h 50mAlaska Airlines
Deal found 9/15$467
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 11/77:02 amPHL - STS
1 stop9h 24mAlaska Airlines
Fri 11/142:22 pmSTS - PHL
1 stop12h 20mAlaska Airlines
Deal found 9/15$487
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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.
Wed 11/57:02 amPHL - STS
1 stop9h 24mAlaska Airlines
Sun 11/98:03 pmSTS - PHL
2 stops30h 39mAlaska Airlines
Deal found 9/16$491

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 September 16, 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

Wed 10/22

7:00 am-10:06 pm

1 stop18h 06m

Santa Rosa Sonoma County

Tue 10/28

2:22 pm-5:42 am

1 stop12h 20m

$382

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Wed 12/3

7:06 am-1:29 pm

1 stop9h 23m

Santa Rosa Sonoma County

Sun 12/7

2:21 pm-5:46 am

1 stop12h 25m

$402

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Sun 11/9

7:02 am-1:26 pm

1 stop9h 24m

Santa Rosa Sonoma County

Fri 11/14

2:22 pm-6:12 pm

1 stop24h 50m

$422

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Sat 11/8

7:12 pm-1:26 pm

1 stop21h 14m

Santa Rosa Sonoma County

Sat 11/15

7:00 am-5:42 am

1 stop19h 42m

$442

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Fri 1/23

6:35 pm-1:48 pm

1 stop22h 13m

Santa Rosa Sonoma County

Sun 1/25

2:45 pm-5:31 pm

1 stop23h 46m

$452

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Sun 10/12

7:00 am-1:36 pm

1 stop9h 36m

$293

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Sun 10/12

6:19 am-4:51 pm

2 stops13h 32m

$363

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Sun 10/5

5:00 am-11:55 am

1 stop9h 55m

$390

PhiladelphiaSanta Rosa

PHL - STS

PHLSTS

Philadelphia

Sun 10/5

7:15 am-1:36 pm

3 stops57h 21m

$422

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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 September 16, 2025.
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
10,000 reviews

Comfort

7.2

Crew

8.0

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.4

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
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Comfort

7.2

Crew

8.0

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.4

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 18h 06m. 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 58% 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 $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 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$289Average$697FlexibilityNo cancel feeOn-time71%

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