Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from San Francisco to Porto from $400

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Porto departing on 9/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? to track prices.

Find the cheapest flights from San Francisco to Porto

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from San Francisco to Porto.
7:40 pm - 11:00 amSFO-OPO
31h 20m1 stop
12:15 pm - 4:30 pmOPO-SFO
36h 15m1 stop
$552Scandinavian Airlines
Find Deal
Mon, Apr 21 - Wed, May 7
7:40 pm - 11:00 amSFO-OPO
31h 20m1 stop
11:50 am - 4:30 pmOPO-SFO
36h 40m1 stop
$632Scandinavian Airlines
Find Deal
Mon, Sep 1 - Wed, Sep 10
7:30 pm - 6:30 pmSFO-OPO
15h 00m1 stop
12:20 pm - 4:10 pmOPO-SFO
35h 50m1 stop
$807SWISS
Find Deal
Wed, May 14 - Wed, May 21
4:20 pm - 3:00 pmSFO-OPO
14h 40m1 stop
7:00 am - 2:35 pmOPO-SFO
15h 35m1 stop
$848TAP AIR PORTUGAL
Find Deal
Mon, Sep 1 - Wed, Sep 10
7:30 pm - 7:55 amSFO-OPO
28h 25m1 stop
8:40 am - 4:10 pmOPO-SFO
15h 30m1 stop
$867SWISS
Find Deal
Sun, Apr 27 - Sat, May 10
7:20 pm - 5:00 pmSFO-OPO
13h 40m1 stop
7:00 am - 2:35 pmOPO-SFO
15h 35m1 stop
$900TAP AIR PORTUGAL
Find Deal
Sat, Sep 6 - Wed, Sep 10
11:45 pm - 9:35 amSFO-OPO
25h 50m1 stop
12:50 pm - 3:05 pmOPO-SFO
34h 15m2 stops
$958United Airlines
Find Deal
Sun, Aug 31 - Tue, Sep 16
11:47 pm - 9:25 amSFO-OPO
25h 38m1 stop
12:35 pm - 7:41 amOPO-SFO
27h 06m2 stops
$985United Airlines
Find Deal
Tue, Jul 1 - Wed, Jul 16
2:40 pm - 10:50 pmSFO-OPO
24h 10m1 stop
11:05 am - 7:00 pmOPO-SFO
15h 55m1 stop
$1,001Lufthansa
Find Deal
Sun, May 4 - Thu, May 29
2:40 pm - 3:40 pmSFO-OPO
17h 00m1 stop
12:10 pm - 12:40 pmOPO-SFO
32h 30m1 stop
$1,020Lufthansa
Find Deal
Sun, May 4 - Mon, Jun 2

American Airlines flights from San Francisco to Porto

Our best American Airlines deals on San Francisco to Porto flight tickets
American Airlines
May 4
SFO11:32 amSan Francisco
20h 23m
2 stops
OPO3:55 pmPorto
May 16
OPO8:15 amPorto
20h 20m
2 stops
SFO8:35 pmSan Francisco
American Airlines
Mar 28
SFO7:27 amSan Francisco
17h 13m
2 stops
OPO7:40 amPorto
Mar 31
OPO12:20 pmPorto
20h 08m
2 stops
SFO12:28 amSan Francisco
American Airlines
May 15
SFO5:45 pmSan Francisco
18h 10m
1 stop
OPO7:55 pmPorto
May 24
OPO8:15 amPorto
20h 45m
2 stops
SFO9:00 pmSan Francisco

Air Transat flights from San Francisco to Porto

Our best Air Transat deals on San Francisco to Porto flight tickets
Air Transat
May 18
SFO1:30 pmSan Francisco
14h 15m
1 stop
OPO11:45 amPorto
May 29
OPO1:30 pmPorto
31h 00m
1 stop
SFO12:30 pmSan Francisco
Air Transat
May 18
SFO1:30 pmSan Francisco
14h 15m
1 stop
OPO11:45 amPorto
May 27
OPO1:30 pmPorto
31h 00m
1 stop
SFO12:30 pmSan Francisco
Air Transat
May 18
SFO1:30 pmSan Francisco
14h 15m
1 stop
OPO11:45 amPorto
May 31
OPO1:30 pmPorto
31h 00m
1 stop
SFO12:30 pmSan Francisco

See travel insights to Porto from

How to get the cheapest flight ticket from San Francisco to Porto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from San Francisco, with most prices found around $690. If you aren’t able to travel during the month of January, then book flights to Porto from San Francisco during February instead. Flights to Porto in February, while not as cheap as those in January, still average around $725.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Thursday when prices can be found for as low as $981. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $1,148. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the afternoon is the cheapest time of day to fly from San Francisco to Porto when you can find flight prices for as low as $896. Flying to Porto in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,138 on average. Flights to Porto from San Francisco in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from San Francisco when booking 20 weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $969 when searching 20 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from San Francisco for as low as $877 on momondo.

How have San Francisco to Porto flight prices changed over time?

As of March 2025, prices for San Francisco to Porto flights are approximately 8% cheaper when compared to flights at the same time last year.

When to book flights from San Francisco to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Francisco to Porto (SFO to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Porto

Best Price Found

$400

Fastest flight time

13h 40m

Direct flights

None

Airports in Porto

1 airport
The best one-way flight to Porto from San Francisco in the past 72 hours is $400. The best round-trip flight deal from San Francisco to Porto found on momondo in the last 72 hours is $552.
The fastest flight from San Francisco to Porto takes 13h 40m
There are no direct flights from San Francisco to Porto. Popular non-direct route for this connection is San Francisco Airport - Porto Airport.
There is 1 airport near Porto: Porto (OPO)

  • How far is San Francisco to Porto by plane?

    Porto is 5565.0 mi away from San Francisco. Typically, this will take 13h 40m by plane in normal conditions.

  • When did momondo last update prices for flights from San Francisco Airport to Porto Airport?

    Prices for flights from San Francisco Airport to Porto Airport were last updated today.

  • How many operators does momondo search for flights from San Francisco Airport to Porto Airport?

  • How old do you have to be to fly from San Francisco Airport to Porto Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Francisco Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The necessary travel and health documents for your Porto Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from San Francisco to Porto?


Best airlines flying from San Francisco to Porto

Compare and see reviews for airlines that fly from San Francisco to Porto with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $375Free CancellationRating
7.1
1,827 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $556Free CancellationRating
7.0
2,651 reviews
Search Iberia flights
Air CanadaPriceFrom $653Free CancellationRating
7.0
8,981 reviews
Search Air Canada flights
DeltaPriceFrom $685Free CancellationRating
8.0
7,895 reviews
Search Delta flights
KLMPriceFrom $702Free CancellationRating
7.8
1,321 reviews
Search KLM flights
United AirlinesPriceFrom $706Free CancellationRating
7.4
8,603 reviews
Search United Airlines flights
SWISSPriceFrom $713Free CancellationRating
7.5
1,570 reviews
Search SWISS flights
Air TransatPriceFrom $781Free CancellationRating
7.8
381 reviews
Search Air Transat flights
VuelingPriceFrom $786Free CancellationRating
7.1
1,146 reviews
Search Vueling flights
LufthansaPriceFrom $814Free CancellationRating
6.7
6,955 reviews
Search Lufthansa flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Coimbra
Aveiro
Caminha
Matosinhos
Vila Nova de Gaia
Braga
Chaves
Guimarães
Arcos de Valdevez
Esposende
Viseu
Espinho
Lamego
Ponte de Lima
Mira
Baiao
Pinhao
Santa Maria da Feira
Curia
Mesao Frio

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Porto?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Porto from San Francisco.

Can I find flights from San Francisco to Porto with flexible booking policies on momondo?

Flights from San Francisco to Porto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from San Francisco to Porto?

Once all potential San Francisco to Porto flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from San Francisco to Porto right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Porto, momondo offers a useful price alert feature which will track prices for flights to Porto from San Francisco and alert you when they change.


An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Wed 4/2
Wed 4/9

Find better results for your trip to Portugal