Cheap flights from Porto to San Diego

Compare Porto to San Diego flight deals

Find the cheapest month or even day of the year to fly to San Diego

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Flight deals from Porto to San Diego

Looking for a cheap last-minute deal or the best return flight from Porto to San Diego? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Porto to San Diego

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

Alternative Porto to San Diego routes

Looking for the cheapest, fastest or easiest route from Porto to San Diego? You could fly into the following airports instead.

Porto to San Diego: Flight information

The things to know before you go.
Cheapest flight found$582
Cheapest month to flyJune

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

There are 2 airports in San Diego: San Diego International and McClellan-Palomar.
The best price we found for a return flight from Porto to San Diego is $1,094. 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 Porto to San Diego. But we found flights with one or more stops from $1,094.
As of February 2026, there are no flights flying from Porto to San Diego.
The cheapest month to fly from Porto to San Diego is usually April.
If you're flying from Porto Airport, the cheapest airport near San Diego is San Diego International – which is 4.1 km away from the centre of San Diego. We've found flights into this airport from $1,094.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Porto Airport to San Diego on Wednesday, 22 April 2026.
No airlines currently offer direct flights between Porto Airport and San Diego. 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 San Diego 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 San Diego is around 40 days in advance, so don’t leave your flight to the last minute.
In February, the average temperature is usually around 13°C. August is typically the warmest month in San Diego, when it usually averages around 28°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging 10°C. The rainiest month is February.
Currently, Delta offers the cheapest flight tickets to San Diego.

Travelling from Porto Airport (OPO) to San Diego: what you need to know

  • San Diego is seven hours behind Porto, where Porto Airport is located. San Diego runs on the UTC-7 timezone.

  • For stress-free travel, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This leaves you with plenty of time to catch your OPO to San Diego flight.

  • If you're jetting off during a bank holiday or another peak period, give yourself extra time. A good rule is two hours ahead of domestic flights and up to four hours before international departures. Check-in and security lines will be longer.

  • Think about adding a stopover to potentially unlock a cheaper plane ticket from OPO to San Diego. Simply uncheck 'Direct flights only' during your search. Break up your trip (and maybe save some cash) by stopping at one of these connection hubs:

    • Newark Liberty International Airport (EWR)

    • Pearson International Airport (YYZ)

    • Franz Josef Strauss Airport (MUC)

  • OPO is around 11 kilometres from central Porto. If you're catching a cab, driving or ride-sharing from the centre, it'll take you 20 minutes or so to get there, depending on traffic conditions. If you're planning to take public transport, expect the travel time to be around 50 minutes.

  • Searching for a hotel close to OPO? If you're catching an early flight from Porto Airport to San Diego, these accommodation options will put you moments from your departure lounge:

  • When it comes to the on-time performance of Porto Airport, 74.49% of flights arrive within the expected time frame.

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

  • $582 is the lowest price we've found for a one-way Porto Airport to San Diego flight. A round-trip ticket right now is $1,094. Depending on how early you book and the availability, these fares may change.

  • Don't leave things to the last minute. You're more likely to land cheap flights from OPO to San Diego if you book early. Airlines often have some great early bird discounts.

  • The 'Whole month' tool will show you the cheapest tickets from Porto Airport to San Diego across every month. It's an easy way to snap up a bargain if your dates are flexible.

  • Locking in a cheap flight from OPO to San Diego is a breeze with Price Alerts. Simply set up one of these automatic notifications and we'll let you know as soon as a better deal is available.

  • Save money on your flight from Porto Airport to San Diego with the help of our filters. Select your preferred duration, departure time and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in San Diego

San Diego International Airport (SAN)

  • San Diego International Airport (SAN) is around 5 kilometres from the centre of San Diego. If you're getting a cab or a ride-share, the drive takes about 10 minutes.

  • If you're travelling by public transport, expect a journey time of around 20 minutes.

  • Look into staying at a hotel near SAN if you're coming in on a late flight from Porto Airport to San Diego. Pick one of these options and make your first night all about catching up on rest:

  • Fast-track your adventure by picking up a San Diego International Airport rental car. Grab your wheels from Thrifty, Dollar or Budget to explore San Diego and beyond.

  • Lock in the best rate by reserving your vehicle from San Diego International Airport about two weeks before your flight from OPO to San Diego.

  • The street address for SAN is N Harbour Dr.

McClellan-Palomar Airport (CLD)

  • Central San Diego is about 56 kilometres from McClellan-Palomar Airport (CLD). After your flight from Porto Airport to San Diego has hit the runway and you've navigated your way to arrivals, expect a drive of around 40 minutes.

  • Public transport will get you there in around 2 hours 15 minutes.

  • Following your OPO to San Diego flight, rest your head at a hotel near CLD. These are some great accommodation options that'll help you slip into relaxation mode:

  • Forget about public transport timetables or long cab lines. Pick up a McClellan-Palomar Airport rental car and take your trip in whatever direction you choose. Compare offers from Budget, Hertz and Avis.

  • Usually, the earlier you book, the bigger the savings and variety of vehicles. Secure your ride from CLD as soon as you've confirmed your plans.

Best time to go to San Diego

  • Before you book your flights from Porto Airport to San Diego, consider which time of year works best for you. High season in San Diego offers a bustling atmosphere and plenty of activities, while the low season brings cheaper hotel deals and smaller crowds.

  • When booking your Porto Airport to San Diego plane ticket, think about the type of weather you enjoy. August is the warmest month in San Diego, with temperatures ranging from 17ºC (63ºF) to 28ºC (82ºF).

  • Search for cheap tickets from OPO to San Diego in February if you'd rather travel when it's cooler. Temperatures are at their lowest then, ranging between 7ºC (45ºF) and 23ºC (73ºF) on average.

More about San Diego

Explore more of United States

  • San Diego will leave a lasting impression, but there are so many other parts of United States you'll want to see. About 177 kilometres north-west of San Diego, a visit to Los Angeles will keep your itinerary packed. Start with attractions like Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • Phoenix is another must-experience destination in United States and is around 483 kilometres east of San Diego. No trip is complete without experiencing Desert Botanical Garden, Heard Museum and Papago Park.

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