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$346+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — OPO
ene. 14 — ene. 211
mié. 1/14
mié. 1/21
1 adult, Economy
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Cheapflights Tip: The best prices from Fremont to Porto are usually found in January or November, booked 89 days in advance, depart on a Thursday or Monday and return on a Wednesday

Cheap 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 diciembre 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/249:40 pmSFO - OPO
2 stops31h 35mMultiple Airlines
dom. 12/288:45 amOPO - SFO
1 stop15h 45mMultiple Airlines
Deal found 12/15$1,478
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/257:55 pmSFO - OPO
1 stop18h 45mMultiple Airlines
dom. 12/286:15 amOPO - SFO
1 stop21h 55mMultiple Airlines
Deal found 12/15$1,480
This Kiwi.com deal was found by Cheapflights users on 12/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/286:20 pmSFO - OPO
1 stop33h 45mMultiple Airlines
mar. 12/308:00 pmOPO - SFO
1 stop26h 30mMultiple Airlines
Deal found 12/13$1,501
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/249:40 pmSFO - OPO
2 stops31h 35mMultiple Airlines
lun. 12/296:55 amOPO - SFO
1 stop15h 40mMultiple Airlines
Deal found 12/15$1,506
This Kiwi.com deal was found by Cheapflights users on 12/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/254:40 pmSFO - OPO
1 stop21h 40mMultiple Airlines
mar. 12/308:00 pmOPO - SFO
1 stop26h 30mMultiple Airlines
Deal found 12/13$1,568
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/257:55 pmSFO - OPO
2 stops27h 20mMultiple Airlines
lun. 12/296:55 amOPO - SFO
1 stop15h 40mMultiple Airlines
Deal found 12/15$1,575
This Kiwi.com deal was found by Cheapflights users on 12/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/265:20 pmSFO - OPO
1 stop18h 15mMultiple Airlines
mar. 12/308:00 pmOPO - SFO
1 stop26h 30mMultiple Airlines
Deal found 12/13$1,605
This KAYAK deal was found by Cheapflights users on 12/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/281:30 pmSFO - OPO
1 stop15h 20mLufthansa
mar. 12/3012:30 pmOPO - SFO
2 stops34h 20mLufthansa
Deal found 12/13$1,611

Find flight deals from Fremont to Porto

Keep the following information in mind while searching for Fremont to Porto flight deals. Data was last updated diciembre 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$546
(FlightHub)

One-way from

$346
(Trip.com)

Popular in

July

Cheapest in

January

Average price

$925
Provider with most accurate pricing for San Francisco-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Porto flights.
Search Deals
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 ($238 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 diciembre 15, 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

mié. 3/11

4:03 pm-4:55 pm

2 stops41h 52m

Porto

mié. 3/18

10:25 am-3:35 pm

1 stop36h 10m

$630

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

jue. 4/30

4:45 pm-8:40 am

1 stop31h 55m

Porto

sáb. 5/9

9:30 am-2:40 pm

1 stop37h 10m

$649

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

jue. 2/5

6:50 pm-9:55 am

1 stop31h 05m

Porto

mié. 2/11

10:55 am-4:45 pm

1 stop37h 50m

$661

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

sáb. 3/21

5:35 pm-3:00 pm

1 stop14h 25m

Porto

sáb. 3/28

6:55 am-3:45 pm

1 stop15h 50m

$717

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

mié. 1/21

6:50 pm-3:10 pm

1 stop36h 20m

Porto

mié. 1/28

10:55 am-4:45 pm

1 stop37h 50m

$718

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

mar. 1/13

6:50 pm-9:55 am

1 stop31h 05m

Porto

mar. 1/20

10:50 am-4:45 pm

1 stop37h 55m

$730

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

mié. 3/11

7:50 pm-9:55 am

1 stop31h 05m

Porto

mié. 3/18

10:55 am-5:45 pm

1 stop37h 50m

$736

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

mar. 2/17

10:55 pm-10:30 am

2 stops27h 35m

Porto

jue. 2/26

11:15 am-11:50 am

1 stop32h 35m

$782

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

sáb. 2/14

10:55 pm-3:25 pm

2 stops32h 30m

Porto

mar. 2/24

5:00 am-11:50 am

1 stop14h 50m

$788

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

mié. 3/11

9:15 am-10:30 am

2 stops18h 15m

Porto

mié. 3/18

5:00 am-5:28 pm

2 stops19h 28m

$789

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 19 results
1
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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 December 12, 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 89 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 $543). Flying from Fremont to Porto in July is currently the most expensive (average of $806). 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 diciembre 15, 2025.

When flying from Fremont to Porto, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 16% versus a flight in the evening.

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. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 diciembre 15, 2025.
Peruse reviews from past customers who have flown with SWISS, United Airlines, and TAP AIR PORTUGAL from Fremont to Porto 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.
SWISS
7.5
Good
1,812 reviews

Crew

8.3

Boarding

7.7

Overall

7.5

Entertainment

6.8

Comfort

7.4

Food

7.1

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
SWISS
7.5
Good
1,812 reviews
SWISS
7.5
Good
1,812 reviews

Crew

8.3

Boarding

7.7

Overall

7.5

Entertainment

6.8

Comfort

7.4

Food

7.1

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
United Airlines
7.4
Good
9,094 reviews
SWISS
7.5
Good
1,812 reviews

Crew

8.3

Boarding

7.7

Overall

7.5

Entertainment

6.8

Comfort

7.4

Food

7.1

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
TAP AIR PORTUGAL
7.2
Good
2,089 reviews
SWISS
7.5
Good
1,812 reviews

Crew

8.3

Boarding

7.7

Overall

7.5

Entertainment

6.8

Comfort

7.4

Food

7.1

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
Air Canada
7.1
Good
10,527 reviews
SWISS
7.5
Good
1,812 reviews

Crew

8.3

Boarding

7.7

Overall

7.5

Entertainment

6.8

Comfort

7.4

Food

7.1

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
Lufthansa
6.8
Okay
7,631 reviews
SWISS
7.5
Good
1,812 reviews

Crew

8.3

Boarding

7.7

Overall

7.5

Entertainment

6.8

Comfort

7.4

Food

7.1

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight

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.

  • How long is the flight from Fremont to Porto?

    Airlines like Scandinavian Airlines, Turkish Airlines, and TAP AIR PORTUGAL fly from Fremont to Porto in about 14h 25m. The time it takes to get you to your destination can typically vary by up to 27h 27m. Fremont and Porto are separated by a distance of 5566 mi. This flight may include one or multiple stops.

  • 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 $317. TAP AIR PORTUGAL flights start at $382 while deals on United Airlines start at $408 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 $543). Flying from Fremont to Porto in July is currently the most expensive (average of $806). 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 Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Arcos de Valdevez
Coimbra
Vila Nova de Gaia

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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 diciembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$527Average$781FlexibilityNo cancel feeOn-time77%
IberiaCheapest$540Average$1,116FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$574Average$850FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$625Average$1,090FlexibilityNo cancel feeOn-time76%
SWISSCheapest$626Average$944FlexibilityNo cancel feeOn-time79%
DeltaCheapest$661Average$1,145FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$673Average$879FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$709Average$1,042FlexibilityNo cancel feeOn-time69%
VuelingCheapest$756Average$949FlexibilityNo cancel feeOn-time88%
Air CanadaCheapest$776Average$1,051FlexibilityNo cancel feeOn-time67%

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