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$753+ Cheap flights from Santa Rosa (STS) to Portugal

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
STS — LIS
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap flight deals from Santa Rosa to Portugal

Keep the following information in mind while searching for Santa Rosa to Portugal flight deals. Data was last updated May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$753
(American Airlines)

Popular in

June

Cheapest in

February

Average price

$973
Provider with most accurate pricing for San Francisco-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for San Francisco-Lisbon Humberto Delgado flights.
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From Santa Rosa Sonoma County to Portugal
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Highest demand for flights based on searches. 16% potential increase in price ($173 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Santa Rosa to Portugal

Cheapest flights from Santa Rosa to Portugal
Explore the most affordable flight options available from Santa Rosa to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/302:30 pmSTS - LIS
2 stops19h 55mAmerican Airlines
Fri 10/177:20 amLIS - STS
2 stops23h 15mAmerican Airlines
Deal found 4/30$753
This Iberia deal was found by Cheapflights users on 4/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/111:30 pmSTS - LIS
2 stops23h 05mIberia
Mon 11/1010:05 pmLIS - STS
2 stops32h 30mIberia
Deal found 4/30$959
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/147:23 pmSTS - LIS
1 stop32h 22mMultiple Airlines
Sat 6/217:05 pmLIS - STS
2 stops48h 01mMultiple Airlines
Deal found 4/30$961
This Finnair deal was found by Cheapflights users on 4/30. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/161:30 pmSTS - LIS
2 stops49h 40mFinnair
Sat 11/153:55 pmLIS - STS
2 stops38h 40mFinnair
Deal found 4/30$968

Cheapflights Fare Finder

Customize your flight search to find flights from Santa Rosa to Portugal 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 May 1, 2025.
Use the filters below to find and compare flights from Santa Rosa to Portugal that are best for you.

Fly from

Santa Rosa

Fly to

Portugal

Route

Depart

Return

Price

Santa RosaLisbon

STS - LIS

STSLIS

Santa Rosa Sonoma County

Tue 9/30

2:30 pm-6:25 pm

2 stops19h 55m

Lisbon Humberto Delgado

Fri 10/17

7:20 am-10:35 pm

2 stops23h 15m

$753

Santa RosaLisbon

STS - LIS

STSLIS

Santa Rosa Sonoma County

Sat 10/11

1:30 pm-8:35 pm

2 stops23h 05m

Lisbon Humberto Delgado

Mon 11/10

10:05 pm-10:35 pm

2 stops32h 30m

$959

Santa RosaLisbon

STS - LIS

STSLIS

Santa Rosa Sonoma County

Sat 6/14

7:23 pm-11:45 am

1 stop32h 22m

Lisbon Humberto Delgado

Sat 6/21

7:05 pm-11:06 am

2 stops48h 01m

$961

Santa RosaLisbon

STS - LIS

STSLIS

Santa Rosa Sonoma County

Thu 10/16

1:30 pm-11:10 pm

2 stops49h 40m

Lisbon Humberto Delgado

Sat 11/15

3:55 pm-10:35 pm

2 stops38h 40m

$968

Santa RosaLisbon

STS - LIS

STSLIS

Santa Rosa Sonoma County

Tue 5/20

7:00 am-9:05 am

2 stops18h 05m

$875

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/1

Best time to book a flight from Santa Rosa to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Santa Rosa 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 Santa Rosa to Portugal

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

Currently, January is the cheapest month in which you can book a flight from Santa Rosa to Portugal (average of $612). Flying from Santa Rosa to Portugal in June is currently the most expensive (average of $1,178). 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.

Rainfall in Portugal by month

Plan your trip to Portugal by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

Plan your trip to Portugal by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portugal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated May 1, 2025.
Finnair
7.6
Good
1,275 reviews

Overall

7.6

Comfort

7.4

Boarding

7.6

Food

6.7

Crew

8.1

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
Finnair
7.6
Good
1,275 reviews
Finnair
7.6
Good
1,275 reviews

Overall

7.6

Comfort

7.4

Boarding

7.6

Food

6.7

Crew

8.1

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
American Airlines
7.2
Good
10,000 reviews
Finnair
7.6
Good
1,275 reviews

Overall

7.6

Comfort

7.4

Boarding

7.6

Food

6.7

Crew

8.1

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
Iberia
7.0
Good
2,700 reviews
Finnair
7.6
Good
1,275 reviews

Overall

7.6

Comfort

7.4

Boarding

7.6

Food

6.7

Crew

8.1

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

Related info for your journey

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

  • What airport do you fly from for flights from Santa Rosa to Portugal?

    Santa Rosa Sonoma County (STS) is the airport you will fly out of if you book a flight from Santa Rosa to Portugal. It is only a 7.2 mi journey to Sonoma County (STS) from Santa Rosa’s city center.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Santa Rosa to Portugal 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 Santa Rosa to Portugal?

    Currently, January is the cheapest month in which you can book a flight from Santa Rosa to Portugal (average of $612). Flying from Santa Rosa to Portugal in June is currently the most expensive (average of $1,178). 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

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