$139+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — STS
Sep 14 — Sep 211
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Philadelphia to Santa Rosa with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Philadelphia to Santa Rosa
Cheapest
Best
Last-minute
One-way
Cheapest flights from Philadelphia to Santa RosaExplore 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 August 15, 2026.
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 August 15, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/13. 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.
Sat 10/107:02 am -
1 stop9h 04m
Fri 10/165:06 pm -
1 stop9h 35m
Deal found 8/13![Alaska Airlines logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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 9/227:00 am -
1 stop8h 46m
Sat 9/265:34 pm -
1 stop9h 06m
Deal found 8/10![Alaska Airlines logo]()
$349
This Expedia deal was found by Cheapflights users on 8/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/227:00 am -
1 stop8h 46m
Wed 9/307:03 am -
1 stop19h 37m
Deal found 8/12![Alaska Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 8/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:55 am -
2 stops11h 10m
Mon 11/211:21 am -
2 stops10h 34m
Deal found 8/10![Delta logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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.
Mon 9/217:00 am -
1 stop8h 46m
Tue 9/295:34 pm -
1 stop9h 06m
Deal found 8/10![Alaska Airlines logo]()
$384
This Alaska Airlines deal was found by Cheapflights users on 8/12. 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.
Sat 10/37:02 am -
1 stop9h 04m
Wed 10/710:00 am -
2 stops16h 41m
Deal found 8/12![Alaska Airlines logo]()
$399
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:00 am -
2 stops11h 50m
Wed 10/74:23 pm -
1 stop10h 03m
Deal found 8/13![American Airlines logo]()
$400
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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.
Mon 9/217:00 am -
1 stop8h 46m
Wed 9/305:34 pm -
1 stop9h 06m
Deal found 8/10![Alaska Airlines logo]()
$416
Best flights from Philadelphia to Santa RosaDiscover carefully curated flight deals from Philadelphia to Santa Rosa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 15, 2026.
Discover carefully curated flight deals from Philadelphia to Santa Rosa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 15, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/13. 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.
Sat 10/37:02 am -
1 stop9h 04m
Wed 10/75:06 pm -
1 stop9h 35m
Deal found 8/13![Alaska Airlines logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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 10/287:02 am -
1 stop9h 04m
Tue 11/35:23 pm -
1 stop9h 09m
Deal found 8/10![Alaska Airlines logo]()
$349
This Alaska Airlines deal was found by Cheapflights users on 8/14. 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.
Tue 10/207:02 am -
1 stop9h 04m
Wed 10/215:06 pm -
1 stop9h 35m
Deal found 8/14![Alaska Airlines logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 8/13. 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.
Fri 9/256:59 pm -
1 stop20h 50m
Sun 9/277:03 am -
1 stop19h 37m
Deal found 8/13![Alaska Airlines logo]()
$430
This Alaska Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 10/74:17 pm -
1 stop19h 40m
Sun 10/117:00 am -
1 stop19h 41m
Deal found 8/12![Alaska Airlines logo]()
$435
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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.
Mon 9/217:00 am -
1 stop8h 46m
Mon 9/285:34 pm -
1 stop9h 06m
Deal found 8/10![Alaska Airlines logo]()
$470
Last-minute flights from Philadelphia to Santa RosaDiscover last-minute flight deals from Philadelphia to Santa Rosa. Data last updated August 15, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Santa Rosa. Data last updated August 15, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/10. 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.
Tue 8/259:35 am -
1 stop8h 57m
Sat 8/2912:58 pm -
1 stop7h 30m
Deal found 8/10![American Airlines logo]()
$423
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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 9/207:00 am -
1 stop8h 46m
Sat 9/265:34 pm -
1 stop9h 06m
Deal found 8/10![Alaska Airlines logo]()
$435
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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.
Mon 9/217:00 am -
1 stop8h 46m
Tue 9/295:34 pm -
1 stop9h 06m
Deal found 8/10![Alaska Airlines logo]()
$384
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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.
Mon 9/217:00 am -
1 stop8h 46m
Wed 9/305:34 pm -
1 stop9h 06m
Deal found 8/10![Alaska Airlines logo]()
$416
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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.
Mon 9/217:00 am -
1 stop8h 46m
Thu 10/15:34 pm -
1 stop9h 06m
Deal found 8/10![Alaska Airlines logo]()
$419
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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 9/227:00 am -
1 stop8h 46m
Sat 9/265:34 pm -
1 stop9h 06m
Deal found 8/10![Alaska Airlines logo]()
$349
This Expedia deal was found by Cheapflights users on 8/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/227:00 am -
1 stop8h 46m
Wed 9/307:03 am -
1 stop19h 37m
Deal found 8/12![Alaska Airlines logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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.
Thu 9/247:00 am -
2 stops14h 07m
Tue 9/295:34 pm -
1 stop9h 06m
Deal found 8/10![Alaska Airlines logo]()
$422
This Alaska Airlines deal was found by Cheapflights users on 8/13. 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.
Fri 9/256:59 pm -
1 stop20h 50m
Sun 9/277:03 am -
1 stop19h 37m
Deal found 8/13![Alaska Airlines logo]()
$430
One-way flights from Philadelphia to Santa RosaSearch for one-way flight options from Philadelphia to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated August 15, 2026.
Search for one-way flight options from Philadelphia to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated August 15, 2026.
This Delta deal was found by Cheapflights users on 8/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:20 am -
2 stops13h 45m
Deal found 8/11![Delta logo]()
$139
This Alaska Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 10/217:02 am -
1 stop9h 04m
Deal found 8/13![Alaska Airlines logo]()
$170
This Priceline deal was found by Cheapflights users on 8/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:02 am -
1 stop9h 04m
Deal found 8/11![Alaska Airlines logo]()
$175
This Travelocity deal was found by Cheapflights users on 8/11. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/74:17 pm -
1 stop19h 40m
Deal found 8/11![Alaska Airlines logo]()
$180
This American Airlines deal was found by Cheapflights users on 8/10. 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.
Wed 9/169:35 am -
1 stop9h 15m
Deal found 8/10![American Airlines logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 8/12. 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.
Mon 8/317:02 am -
1 stop8h 41m
Deal found 8/12![Alaska Airlines logo]()
$233
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:00 am -
1 stop10h 09m
Deal found 8/13![American Airlines logo]()
$261
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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 8/297:02 am -
1 stop8h 54m
Deal found 8/10![Alaska Airlines logo]()
$267
Find 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 August 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $339 (Alaska Airlines) |
One-way from | $139 (Delta) |
Popular in | December |
Cheapest in | March |
Average price | $538 |
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 August 15, 2026.
Use the filters below to find and compare flights from Philadelphia to Santa Rosa that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaSanta Rosa
PHL Philadelphia - STS Santa Rosa Sonoma County
PHLSTS
Philadelphia
Sat 10/3
7:02 am-1:06 pm
1 stop9h 04m
Santa Rosa Sonoma County
Wed 10/7
5:06 pm-5:41 am
1 stop9h 35m
$339
PhiladelphiaSanta Rosa
PHL Philadelphia - STS Santa Rosa Sonoma County
PHLSTS
Philadelphia
Wed 10/28
7:02 am-1:06 pm
1 stop9h 04m
Santa Rosa Sonoma County
Tue 11/3
5:23 pm-5:32 am
1 stop9h 09m
$349
PhiladelphiaSanta Rosa
PHL Philadelphia - STS Santa Rosa Sonoma County
PHLSTS
Philadelphia
Tue 10/20
7:02 am-1:06 pm
1 stop9h 04m
Santa Rosa Sonoma County
Wed 10/21
5:06 pm-5:41 am
1 stop9h 35m
$413
PhiladelphiaSanta Rosa
PHL Philadelphia - STS Santa Rosa Sonoma County
PHLSTS
Philadelphia
Fri 9/25
6:59 pm-12:49 pm
1 stop20h 50m
Santa Rosa Sonoma County
Sun 9/27
7:03 am-5:40 am
1 stop19h 37m
$430
PhiladelphiaSanta Rosa
PHL Philadelphia - STS Santa Rosa Sonoma County
PHLSTS
Philadelphia
Wed 10/7
4:17 pm-8:57 am
1 stop19h 40m
Santa Rosa Sonoma County
Sun 10/11
7:00 am-5:41 am
1 stop19h 41m
$435
Quickest round-trip
PhiladelphiaSanta Rosa
PHL Philadelphia - STS Santa Rosa Sonoma County
PHLSTS
Philadelphia
Mon 9/21
7:00 am-12:46 pm
1 stop8h 46m
Santa Rosa Sonoma County
Mon 9/28
5:34 pm-5:40 am
1 stop9h 06m
$470
Cheapest one-way
PhiladelphiaSanta Rosa
PHL Philadelphia - STS Santa Rosa Sonoma County
PHLSTS
Philadelphia
Wed 10/21
7:02 am-1:06 pm
1 stop9h 04m
$170
PhiladelphiaSanta Rosa
PHL Philadelphia - STS Santa Rosa Sonoma County
PHLSTS
Philadelphia
Sat 8/29
7:02 am-12:56 pm
1 stop8h 54m
$267
Quickest one-way
PhiladelphiaSanta Rosa
PHL Philadelphia - STS Santa Rosa Sonoma County
PHLSTS
Philadelphia
Thu 8/27
7:02 am-12:43 pm
1 stop8h 41m
$335
PhiladelphiaSanta Rosa
PHL Philadelphia - STS Santa Rosa Sonoma County
PHLSTS
Philadelphia
Fri 8/28
7:02 am-12:43 pm
1 stop8h 41m
$335
Showing 1-10 of 13 resultsSorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Philadelphia-Santa Rosa flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Santa Rosa flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
PHL-STS
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
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 August 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.
Overall
7.1
Crew
7.9
Comfort
7.2
Food
6.4
Entertainment
6.8
Boarding
7.5
Reviews
1 / 20
8.0
Excellentameenah,Feb 2024
PHL - DFW
Overall
7.1
Crew
7.9
Comfort
7.2
Food
6.4
Entertainment
6.8
Boarding
7.5
Reviews
1 / 20
8.0
Excellentameenah,Feb 2024
PHL - DFW
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.
Traveling to a place near Santa Rosa?
Book flights to Santa Rosa if you plan to visit one of these locationsFort Bragg
Ukiah
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Philadelphia
Popular flights
Santa Rosa flight routes
Alternative routes for Philadelphia to Santa Rosa
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Santa Rosa by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Philadelphia to Santa Rosa by cabin class
Find flights from Philadelphia to Santa Rosa, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Philadelphia and Santa Rosa flights
Browse other Philadelphia and Santa Rosa flight options. Last updated on August 15, 2026.
Other flights from Philadelphia
Browse through other flights departing from Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on August 15, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Santa Rosa
Explore flights to Santa Rosa departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 15, 2026.
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 August 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$489 | Average$725 | FlexibilityNo cancel fee | On-time71% |