SAN - OPO

$415 Find Cheap Flights from San Diego to Porto - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Diego to Porto departing on 8/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$746
Typical prices: $789-$1,100
Delta
Tue 10/27Tue 11/3
SAN - OPO • 2 stops
Cheapest one-way
$415
Typical prices: $358-$471
Multiple Airlines
Wed 8/5
SAN - OPO • 3 stops
Top airlines
Cheapest • from $743 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between San Diego and Porto. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $913 (round-trip)
Shortest trip • 16h 00m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 41% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Porto!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Diego to Porto (SAN-OPO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Diego to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Diego to Porto

Tue, Oct 27 - Tue, Nov 3
Delta Logo
2:05 pm - 10:00 pm
SAN
-
OPO
24h 55m
2 stops
Delta Logo
5:00 am - 12:10 pm
OPO
-
SAN
15h 10m
1 stop
$746Delta
Mon, Nov 30 - Tue, Dec 8
Multiple Airlines Logo
5:00 pm - 9:30 am
SAN
-
OPO
32h 30m
2 stops
Multiple Airlines Logo
6:00 am - 5:59 pm
OPO
-
SAN
19h 59m
2 stops
$751Multiple Airlines
Tue, Oct 27 - Tue, Nov 3
Delta Logo
6:15 am - 10:35 am
SAN
-
OPO
21h 20m
2 stops
Delta Logo
5:00 am - 5:49 pm
OPO
-
SAN
20h 49m
2 stops
$756Delta
Mon, Oct 19 - Tue, Oct 27
Delta Logo
7:20 am - 10:30 am
SAN
-
OPO
19h 10m
1 stop
Delta Logo
5:00 am - 1:10 pm
OPO
-
SAN
15h 10m
1 stop
$759Delta
Mon, Oct 19 - Mon, Oct 26
Multiple Airlines Logo
1:15 pm - 3:25 pm
SAN
-
OPO
18h 10m
2 stops
Multiple Airlines Logo
11:15 am - 1:10 pm
OPO
-
SAN
32h 55m
1 stop
$763Multiple Airlines
Mon, Oct 19 - Wed, Oct 28
Multiple Airlines Logo
12:35 pm - 7:00 am
SAN
-
OPO
34h 25m
2 stops
Multiple Airlines Logo
7:20 pm - 10:28 pm
OPO
-
SAN
34h 08m
2 stops
$769Multiple Airlines
Tue, Oct 20 - Tue, Oct 27
Delta Logo
9:43 am - 3:25 pm
SAN
-
OPO
21h 42m
2 stops
Delta Logo
5:00 am - 7:14 pm
OPO
-
SAN
21h 14m
2 stops
$773Delta
Wed, Sep 30 - Mon, Oct 12
Delta Logo
1:15 pm - 3:25 pm
SAN
-
OPO
18h 10m
2 stops
Delta Logo
11:25 am - 11:50 am
OPO
-
SAN
32h 25m
1 stop
$780Delta
Mon, Aug 10 - Thu, Aug 20
Multiple Airlines Logo
7:00 am - 7:00 am
SAN
-
OPO
16h 00m
1 stop
Multiple Airlines Logo
6:20 am - 3:25 pm
OPO
-
SAN
17h 05m
1 stop
$816Multiple Airlines
Mon, Aug 10 - Tue, Aug 25
Multiple Airlines Logo
5:00 pm - 7:00 am
SAN
-
OPO
30h 00m
2 stops
Multiple Airlines Logo
6:20 am - 3:25 pm
OPO
-
SAN
17h 05m
1 stop
$817Multiple Airlines
Booking Insights

KAYAK's insights & trends for San Diego to Porto flights

Get data-powered insights and trends into flights from San Diego to Porto to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from San Diego to Porto?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Diego to Porto departing in October.

What is the cheapest month to fly from San Diego to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Diego to Porto, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Diego to Porto is February, where tickets cost $585 (return) on average. On the other hand, the most expensive months are August and May, where the average cost of round-trip tickets is $1,393 and $1,342 respectively.

Good to know

Low seasonFebruary
Cheapest flight$415
Best time to beat the crowds with an average 41% drop in price.
Most popular time to fly with an average 36% increase in price.
Flight from San Diego to Porto

When to book flights from San Diego to Porto

Are your dates flexible? Find out the best times to travel from San Diego to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Diego to Porto

  • What is the cheapest flight from San Diego to Porto?

    In the last 5 days, the lowest price for a flight from San Diego to Porto was $407 for a one-way ticket and $743 for a round-trip.

  • Do I need a passport to fly between San Diego and Porto?

    Yes, you'll most likely have to show a valid passport before boarding the plane in San Diego and on arrival in Porto.

  • Which airports will I be using when flying from San Diego to Porto?

    San Diego and Porto are both served by 1 main airport. You will leave San Diego from San Diego and will be arriving at Porto.

  • Which aircraft models fly most regularly from San Diego to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from San Diego to Porto?

    Star Alliance, and SkyTeam are the airline alliances operating flights between San Diego and Porto, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from San Diego to Porto, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from San Diego to Porto are Delta and KLM. With an average price for the route of $1,001 and an overall rating of 7.8, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $1,061 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from San Diego to Porto?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Diego to Porto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Diego to Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from San Diego is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Diego to Porto?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to San Diego with another airline. Booking your flights between San Diego and OPO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Diego to Porto?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from San Diego up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from San Diego to Porto

 
See real verified KAYAK customer reviews for airlines flying from San Diego to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Diego to Porto? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1532 reviews
7.7Comfort
7.3Food
7.2Entertainment
8.4Crew
7.8Boarding
Airline reviews

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

2.0 MediocreNewton, Mar 2026
IAD - AMS
Read more KLM reviews

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

Transfer at CDG to connecting KLM flight to Amsterdam was a NIGHTMARE. LONG WALKWAYS, NO MOVING WALKWAYS, POOR signage, Have to take a train & No staff visible to help navigate the maze. AVOID TRANSFER AT CDG AT ALL COST.

Seats were comfortable crew members support was very good but AVML ordered or selected by us needs a lot of improvement.

The IFE was quite old, but it worked fine and the content was good. The cabin crew were excellent and the food was as also very good

Very good flight. Crew was great. No issues and we even arrived early.

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

There was a loud squeaky sound the whole time we were flying.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Like most domestic flights in the US, you are basically on your own with this airline when it comes to food, so be sure to purchase meals and drinks ahead of time or expect to arrive starving and dehydrated (like I was).

Service was professional and quick. Premium economy seat was comfortable given the class

The staff was extremely helpful and friendly at all times! They went above and beyond to get us into an earlier flight in San Diego to make our connection in SFO possible, because our original flight did actually not make it! I did so much appreciate the UA team and how they made this possible. We also didn’t have seats together on the long flight to Singapore, but they found us seats together last moment with no additional cost! Nobody sat next to us, so that we were able to sleep! Thanks to UA for improving their service and Underpricer for booking this trip! Please be careful: 1,5 hrs for transfer in San Francisco might not be enough time in the future

Over 2.5 hour maintenance delay on first morning flight with no acknowledgement, compensation or even gesture of good will. Aircraft had overnighted at airport so issue should have been addressed prior to boarding. Over 3.5 hours before first slow and deliberate beverage service.

Complimentary light meal would be appreciated. But great flight crew service on all legs

The food was terrible this time. Otherwise pleasant, quiet, on-time.

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

As usual, United scheduling is completely misleading. A 54-minute layover at O’Hare is too short to make a lot of connections, especially since the flight landed “on time” but had to wait on the taxiway 15 minutes for a gate to open up. Then it takes another 10 minutes to exit the plane before one can run to another concourse to catch a connecting flight.

Flight was ok. Unfortunately it was a Boeing 737, which is a cramped / tight airplane. I prefer the Airbus as they are a more comfortable flight experience.

We were traveling as a family of 5 and they refused to seat us together. There were entire rows open, and my 13 year old daughter had to sit alone. Ridiculous!

Definitely get premium economy on a flight this long if you can. Your legs and while body will thank you.

Lufthansa still has a good level of quality compared to US airlines, especially with respect to (1) food quality - actually tasty, (2) good French red wine - free, (3) good movie selection. Also my ticket price includes 1 free check-in luggage, while some other budget airlines sneak in an extra $150 for a checkin.

The food could be better, more snacks. And have some plugs to chargue the phone.

Second time I took this flight, and they lost my luggage both times. Waiting for my suitcase now, last time it took two days to get it back.

Used to love Lufthansa, but Rowe are too close together in Economy and passengers are allowed to recline their seats so far back it is impossible for those behind them to even reach for carry-on essentials during flight - except for meal service when flight attendants ask for seat backs to be raised, we can’t sleep on planes so this flight was most uncomfortable ever! Rod Rose

Prompt boarding, safe landing and they didn't lose our luggage. No entertainment and no USB plugs to charge phones. No food, though I might have been asleep.

There were several delays in boarding. Then our group wasn’t called. Good thing we went up to the counter to see what was going on. We boarded next and last. I felt sorry for the staff but that was our third flight to get to our destination and we were tired.

The food could have been better. Had a wide range of entertainment to choose from.

I was traveling with a young child and the flight attendants were rude and unhelpful when simple requests were made like an early cracker or cookie to help distract him while everyone else was boarding. Also, my wife received dirty looks from an attendant when she asked if she could get by while holding our crying infant. They made us feel like a burden instead of a paying customer. The food was really sub par, especially the breakfast sandwich; cold, soggy veggie sandwich with no flavor (zero seasoning or vinegar or oil) and as mentioned the bread was cold and soggy wet. Also, there seemed to be something wrong with one of the bathroom’s ventilation, the smell was terrible throughout the entire flight. In the past Lufthansa had a good reputation for customer service, they are actively destroying it with how they currently treat passengers. If our return flight is as bad we will never fly Lufthansa again.

Dear Lufthansa, thank you for the excellent flight. We arrived early which really helped us with our connection. Crew was so nice!

Everything you need to know for your flight from San Diego to Porto

Information on your arrival and departure airports