C$478 Cheap Flights from San Diego International (SAN) to Porto (OPO)

Compare San Diego International to Porto flight deals

Find the cheapest month or even day of the year to fly to Porto

Book the best Porto fare with no extra fees

Flight deals from San Diego International to Porto

Looking for a cheap last-minute deal or the best return flight from San Diego International Airport to Porto Airport? If you want to travel next month, return fares start from C$1,462. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from San Diego International to Porto from C$478 one-way

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Diego International to Porto flights are currently cheapest in October.

San Diego International to Porto: Alternative routes

Compare routes from San Diego International to Porto below. You may find an airport to fly into that's cheaper, faster, or easier than Porto.

San Diego to Porto: Flight information

The things to know before you go.
Cheapest flight foundC$478
Cheapest month to flyOctober

Finding cheap flights from San Diego International to Porto: Frequently asked questions

The best price we found for a return flight from San Diego International to Porto is C$1,045. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from San Diego International to Porto. But we found flights with one or more stops from C$1,045.
As of May 2026, there are no flights flying from San Diego International to Porto.
The cheapest month to fly from San Diego International to Porto is usually November.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Diego International Airport to Porto Airport on Saturday, November 14, 2026.
No airlines currently offer direct flights between San Diego International Airport and Porto Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Porto but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Porto is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, KLM offers the cheapest flight tickets to Porto.

Traveling from San Diego International Airport (SAN) to Porto Airport (OPO): what you need to know

  • You'll likely experience longer lines during popular months such as July and other peak seasons. Arriving up to fours hours ahead of international flights and two hours for domestic departures is a good idea.

  • To break up your flight from San Diego International Airport to Porto Airport, consider adding a stopover. Simply uncheck 'Direct flights only' to find a destination that appeals to you. The most popular stopovers on the SAN - OPO route are:

    • Newark Liberty International Airport

    • Montreal-Pierre Elliott Trudeau International Airport

    • Pearson International Airport

How to find the cheapest flights from San Diego International Airport (SAN) to Porto Airport (OPO)

  • The lowest price we've found for a one-way ticket from San Diego International Airport to Porto Airport is C$478. For a return flight on this route, the best price is C$1,045. Depending on the availability and when you book, these fares could change.

  • To pick up cheap flight tickets from SAN to OPO, book as early as you can. Airlines typically offer their most competitively priced fares when flights are first released.

  • Finding cheap flight tickets from San Diego International Airport to Porto Airport is easier if you can be flexible with your dates. Try using the 'Whole month' search function to see the best prices across the month and snap up a great deal.

  • Getting a cheap ticket from SAN to OPO is a breeze with Price Alerts. Simply create one of these automatic alerts and we'll notify you as soon as the price has dropped.

  • Use filters to find the perfect trip for you. To see the 'Best,' 'Fastest' or 'Cheapest' flights from San Diego International Airport to Porto Airport, use the 'Sort by' tool. You can also filter by arrival and departure times, airline, and number of stops.

Handy information about San Diego International Airport (SAN)

  • Located around 5 kilometres from the center of San Diego, San Diego International Airport can be reached in approximately 9 minutes by car (depending on traffic). The same journey on public transport is roughly 20 minutes.

  • Want a hassle-free start to your vacation? Stay near SAN. Whether you have an early flight from San Diego International Airport to Porto Airport or just don't want to be rushed, these stays are perfect:

Arriving at Porto Airport (OPO)

  • The last thing you want is a lengthy journey to your hotel if you're arriving on a late flight from San Diego International Airport to Porto Airport. Reserve one of these accommodation options near OPO instead:

Getting from Porto Airport (OPO) to central Porto

  • From Porto Airport, Porto is approximately 16 kilometres away. It takes around 21 minutes to get to the center driving.

  • It takes around 49 minutes to get there using public transport.

When to fly to Porto Airport (OPO)

  • August is the busiest month for flights from San Diego International Airport to Porto Airport. To skip the crowds, head to Porto in February.

  • When reserving your flight from San Diego International Airport to Porto Airport, think about the type of weather you enjoy. August is the warmest month in Porto, with the temperature ranging from 14ºC to 32ºC.

  • If you want cooler conditions, look for a cheap ticket from SAN to OPO in January. Average temperatures are between 3ºC and 14ºC then.

More about Porto

Complete your Porto trip with hotels and a car rental

  • You've locked in your cheap ticket to Porto Airport — next up is finding a place to stay, and perhaps even a set of wheels. We've compared prices across hundreds of companies to bring you the top hotels and car rental deals in Porto.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.