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$302+ Cheap flights from Fremont, CA to Porto (OPO)

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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — OPO
Apr 6 — Apr 131
Sun 4/6
Sun 4/13
1 adult, Economy
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Cheapflights Tip: The best prices from Fremont to Porto are usually found in January or February, booked 55 days in advance, depart on a Thursday or Monday and return on a Wednesday

Cheap flight deals from Fremont to Porto

Keep the following information in mind while searching for Fremont to Porto flight deals. Data was last updated April 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$615
(Gotogate)

One-way from

$391
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$895
Provider with most accurate pricing for San Francisco-Porto flight deals.
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Provider most trusted by Cheapflights users for San Francisco-Porto flights.
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From Fremont to Porto
Search Deals
One-way flight from Fremont to Porto
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($256 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Fremont to Porto

Cheapest flights from Fremont to Porto
Explore the most affordable flight options available from Fremont to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.

This Gurufare deal was found by Cheapflights users on 3/31. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/84:40 pmSFO - OPO
1 stop34h 35mScandinavian Airlines
Fri 11/145:55 pmOPO - SFO
1 stop28h 40mScandinavian Airlines
Deal found 3/31$599
This Mytrip deal was found by Cheapflights users on 3/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/19:50 amSFO - OPO
2 stops28h 10mMultiple Airlines
Tue 4/87:35 amOPO - SFO
2 stops22h 10mMultiple Airlines
Deal found 3/31$623
This Iberia deal was found by Cheapflights users on 3/31. 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.
Tue 10/142:28 pmSFO - OPO
2 stops17h 27mIberia
Wed 10/2210:00 pmOPO - SFO
1 stop28h 10mIberia
Deal found 3/31$700
This American Airlines deal was found by Cheapflights users on 3/31. 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 10/142:28 pmSFO - OPO
2 stops17h 27mAmerican Airlines
Wed 10/2212:20 pmOPO - SFO
2 stops19h 06mAmerican Airlines
Deal found 3/31$705
This SWISS deal was found by Cheapflights users on 3/31. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/147:30 pmSFO - OPO
1 stop31h 55mSWISS
Wed 10/2212:20 pmOPO - SFO
1 stop35h 50mSWISS
Deal found 3/31$722
This Gurufare deal was found by Cheapflights users on 3/31. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/88:40 pmSFO - OPO
2 stops27h 00mBritish Airways
Fri 11/148:40 pmOPO - SFO
2 stops26h 20mBritish Airways
Deal found 3/31$727
This Booking.com deal was found by Cheapflights users on 3/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2411:50 amSFO - OPO
1 stop13h 35mAir Canada
Sun 10/126:00 amOPO - SFO
2 stops36h 28mAir Canada
Deal found 3/31$742
This United Airlines deal was found by Cheapflights users on 3/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/311:03 pmSFO - OPO
2 stops26h 42mUnited Airlines
Fri 5/166:00 amOPO - SFO
2 stops19h 19mUnited Airlines
Deal found 3/31$813
This Lufthansa deal was found by Cheapflights users on 3/31. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/152:40 pmSFO - OPO
1 stop17h 05mLufthansa
Thu 4/2411:05 amOPO - SFO
1 stop15h 55mLufthansa
Deal found 3/31$816
This Delta deal was found by Cheapflights users on 3/31. 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 4/231:45 pmSFO - OPO
2 stops21h 50mDelta
Tue 4/2911:25 amOPO - SFO
1 stop32h 20mDelta
Deal found 3/31$820
This KLM deal was found by Cheapflights users on 3/31. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/153:05 pmSFO - OPO
1 stop16h 25mKLM
Thu 4/246:30 amOPO - SFO
2 stops21h 28mKLM
Deal found 3/31$821
This FlightHub deal was found by Cheapflights users on 4/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/267:20 pmSFO - OPO
1 stop13h 40mTAP AIR PORTUGAL
Fri 5/210:00 amOPO - SFO
1 stop14h 50mTAP AIR PORTUGAL
Deal found 4/1$834

Cheapflights Fare Finder

Customize your flight search to find flights from Fremont to Porto 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 April 1, 2025.
Use the filters below to find and compare flights from Fremont to Porto that are best for you.

Fly from

Fremont

Fly to

Porto

Route

Depart

Return

Price

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 4/19

7:40 pm-11:10 am

1 stop31h 30m

Porto

Fri 5/2

5:55 pm-4:30 pm

1 stop30h 35m

$615

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 4/19

7:20 pm-8:25 pm

1 stop17h 05m

Porto

Fri 5/2

10:40 pm-9:25 pm

2 stops30h 45m

$730

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 9/24

11:50 am-9:25 am

1 stop13h 35m

Porto

Sun 10/12

6:00 am-10:28 am

2 stops36h 28m

$742

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 5/4

7:30 pm-6:15 pm

1 stop14h 45m

Porto

Fri 5/16

8:40 am-4:10 pm

1 stop15h 30m

$758

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 5/3

11:03 pm-9:45 am

2 stops26h 42m

Porto

Fri 5/16

6:00 am-5:19 pm

2 stops19h 19m

$813

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 4/15

2:40 pm-3:45 pm

1 stop17h 05m

Porto

Thu 4/24

11:05 am-7:00 pm

1 stop15h 55m

$816

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 4/23

1:45 pm-7:35 pm

2 stops21h 50m

Porto

Tue 4/29

11:25 am-11:45 am

1 stop32h 20m

$820

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 4/15

3:05 pm-3:30 pm

1 stop16h 25m

Porto

Thu 4/24

6:30 am-7:58 pm

2 stops21h 28m

$821

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 4/26

7:20 pm-5:00 pm

1 stop13h 40m

Porto

Fri 5/2

10:00 am-4:50 pm

1 stop14h 50m

$834

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 9/15

1:25 pm-11:45 am

1 stop14h 20m

Porto

Thu 9/25

1:30 pm-12:23 pm

1 stop30h 53m

$843

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 32 results
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Best time to book a flight from Fremont to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Fremont 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 Fremont to Porto

How far ahead should I book a flight from Fremont to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Fremont to Porto. Price data was last updated on March 28, 2025.

The price you pay for your flight from Fremont to Porto may vary depending on when you book. For the best chance of a lower fare, look to book 55 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Fremont to Porto?

Currently, January is the cheapest month in which you can book a flight from Fremont to Porto (average of $523). Flying from Fremont to Porto in June is currently the most expensive (average of $1,081). 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.

What is the cheapest time of day to fly from FR8 to OPO?

Find hourly flight availability from Fremont to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 1, 2025.

When flying from Fremont to Porto, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Fremont to Porto?

Use this chart to determine the cheapest time to fly round-trip from Fremont to Porto. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Fremont to Porto flight should consider departing on Sunday afternoons when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Porto by month

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

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

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

If weather is an important factor for your trip to Porto, 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 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated April 1, 2025.
Read reviews from past customers who have flown Delta, KLM and Air Transat from Fremont to Porto. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Transat
7.8
Good
381 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
771 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,570 reviews
Delta
8.0
Very good
7,899 reviews

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Fremont to Porto. 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 into for flights to Porto from Fremont?

    Most people fly into Porto (OPO) if they book a flight to Porto from Fremont. On average, Porto has 0 inbound flights from Fremont per day from 12 airlines. Porto is conveniently located just 6.8 mi from Porto’s city center.

  • What are the cheapest airlines to fly from Fremont to Porto one-way?

    To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $515. TAP AIR PORTUGAL flights start at $531 while deals on Scandinavian Airlines start at $547 one-way.

  • Can I find deals for flights from Fremont to Porto that include hotel bookings?

    Yes. In addition to deals on Fremont to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Fremont to Porto?

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

  • Can I find deals for business class flights from Fremont to Porto?

    Yes. Cheapflights offers flight deals from Fremont to Porto 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 Fremont to Porto?

    Currently, January is the cheapest month in which you can book a flight from Fremont to Porto (average of $523). Flying from Fremont to Porto in June is currently the most expensive (average of $1,081). 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 Fremont?

Book flights to Fremont if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos
Arcos de Valdevez

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Top 10 airlines flying from Fremont to Porto

Discover the top 10 airlines that operate flights from Fremont to Porto. 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 April 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$375Average$894FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$556Average$1,146FlexibilityNo cancel feeOn-time77%
Scandinavian AirlinesCheapest$624Average$782FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$653Average$776FlexibilityNo cancel feeOn-time67%
DeltaCheapest$685Average$1,036FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$702Average$1,103FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$706Average$1,134FlexibilityNo cancel feeOn-time69%
SWISSCheapest$724Average$994FlexibilityNo cancel feeOn-time79%
Air TransatCheapest$781Average$817FlexibilityNo cancel feeOn-time50%
VuelingCheapest$786Average$958FlexibilityNo cancel feeOn-time88%

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