SAN - OPO

$356 Find Cheap Flights from San Diego to Porto

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 7/20. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to Porto, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to Porto, as well as popular online travel agencies
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Flights 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 28 - Tue, Nov 11
Lufthansa Logo
11:02 am - 10:25 pmSAN-OPO
28h 23m2 stops
Lufthansa Logo
12:30 pm - 7:52 pmOPO-SAN
39h 22m2 stops
$597Lufthansa
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Tue, Oct 28 - Tue, Nov 11
Lufthansa Logo
11:02 am - 2:45 pmSAN-OPO
20h 43m2 stops
Lufthansa Logo
1:45 pm - 3:45 pmOPO-SAN
34h 00m1 stop
$601Lufthansa
Find Deal
Tue, Oct 28 - Tue, Nov 11
United Airlines Logo
8:00 am - 2:45 pmSAN-OPO
23h 45m3 stops
United Airlines Logo
6:00 am - 12:12 amOPO-SAN
26h 12m2 stops
$614United Airlines
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Tue, Oct 28 - Tue, Nov 11
Iberia Logo
7:00 am - 7:40 amSAN-OPO
17h 40m2 stops
Iberia Logo
8:40 pm - 8:07 pmOPO-SAN
31h 27m2 stops
$617Iberia
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Mon, Dec 1 - Mon, Dec 22
 Logo
11:02 am - 2:55 pmSAN-OPO
19h 53m2 stops
 Logo
12:05 pm - 10:37 pmOPO-SAN
42h 32m2 stops
Mon, Dec 1 - Mon, Dec 22
United Airlines Logo
7:40 pm - 2:45 pmSAN-OPO
35h 05m3 stops
United Airlines Logo
12:30 pm - 2:23 pmOPO-SAN
57h 53m2 stops
$650United Airlines
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Wed, Sep 24 - Thu, Oct 2
Delta Logo
10:00 am - 3:30 pmSAN-OPO
21h 30m2 stops
Delta Logo
4:20 pm - 11:21 amOPO-SAN
27h 01m2 stops
$785Delta
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Mon, Aug 4 - Wed, Aug 20
Delta Logo
9:59 am - 3:30 pmSAN-OPO
21h 31m2 stops
Delta Logo
11:25 am - 12:00 pmOPO-SAN
32h 35m1 stop
$792Delta
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Sun, Jun 29 - Sat, Jul 5
KLM Logo
1:55 pm - 3:35 pmSAN-OPO
17h 40m1 stop
KLM Logo
7:00 pm - 12:00 pmOPO-SAN
25h 00m1 stop
$1,210KLM
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Wed, Jun 25 - Sat, Jul 5
KLM Logo
5:04 pm - 7:35 pmSAN-OPO
18h 31m2 stops
KLM Logo
7:00 pm - 12:00 pmOPO-SAN
25h 00m1 stop
$1,215KLM
Find Deal
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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.

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 $648 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,699 and $1,273 respectively.

Good to know

Low seasonApril
High seasonDecember
Cheapest flight$356
Best time to beat the crowds but there is an average 11% increase in price.
Most popular time to fly with an average 9% 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 3 days, the lowest price for a flight from San Diego to Porto was $356 for a one-way ticket and $597 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, oneworld, 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 $1,072 and an overall rating of 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $860 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.

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.
8.0
DeltaOverall score based on 7950 reviews
7.3Food
8.2Boarding
8.5Crew
7.9Entertainment
7.9Comfort
Airline reviews

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

10.0 ExcellentIrene, Jun 2025LAX - HNL
Read more Delta reviews

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

Delta flight was on time, seats were comfortable, and crew was nice.

Bathrooms dirty sinks clogged. No one seemed to clean them. Plane very old

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

Klm start boarding while somw air issue in the plan

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

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!

You should not have to pay for WiFi in business class

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

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

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

Overall very poor. Flight was disorganised, staff were rude and this is my second experience with KLM that I've had baggage go missing. It feels like, if you are an economy customer, KLM staff do not show you any care. I shall never fly with KLM again. Worst airline in Europe

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

The food was the worst I’ve had on any flight I’ve ever been on.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.

The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

Very small and uncomfortable seats, Hard to hear entertainment system sound. Horrible food. Staff doesn't care much about the passengers. 2nd time they didn't give me my vegetarian meal. They asked me regular food with meat. The airline and staff was from United airlines.

Checkin took along timen only.few angents available at.checkin desk. Customer support over phone no existence

At baggage claim, I was given the wrong printed ticket. The ticket belonged to another passenger for a different flight — to Zurich instead of Frankfurt (layover). I was even allowed to pass security, and when I asked the Lufthansa employee if I was on the correct flight, and why it was changed. The employee said everything was correct and I should board. When I got on the plane, there was someone in my seat, and the crew on the plane finally realized that I was on the wrong plane. When I got off the plane, nobody was willing to help, and the security refused to provide my original printed ticket. That was until I showed them that I took a photo of the ticket; once they realized I had photographic evidence, they were suddenly ready to help me. The Lufthansa employee began communicating with other airlines and found a flight that would take me to my destination via Polish Airlines. I was required to once again go through security, re-check my bag, and once again pay for my checked bag and weight overage fees. This experience was incredibly stressful and very frustrating, as you can imagine. A Lufthansa employee told me I would be eligible for a refund. Please tell me what steps I need to take in order to make that happen. Thank you!

Good service … bus transfer upon arrival from plane to terminal: atrocious!!!

helpful and friendly. The Lufthanza people I dealt with before my holiday were so unhelpful by comparison.

My flight was late from US to Frankfurt so I missed my connecting flight flight and I had to wait for long to catch the next flight which was very tiring. Otherwise everyone was very nice.

Everything went really well. Snacks could be better and there was no tea/coffee service after dinner. Crew was helpful and friendly.

Lufthansa charged me $280 to take skiiis when in the US the boot bag and skiis are one check-in bag. This was not advertised and a real shock at the airport. They only took the boot bag as a check-in item. The seats have been squeezed together like any economy airline and legroom is not as good as it used to be. Otherwise, the flight was fine and staff was helpful for making my connection.

Professional crew and staff, very organized boarding and on time flights, baggage handling. Indian vegetarian meals were good, though could improve by offering Indian bread (naan/paratha/roti) as well. Very helpful pre flight emails with details of onboard experience 👍 Above average selection of movies. Consider offering more movies with subtitles and ratings indicators (e.g., IMDB scores).

Terrible experience. Should be a short simple flight from San Francisco to Palm Springs. Disgusting insult that United Air doesn’t have a cabin crew ready to receive a plane that’s already an hour plus late in departure. Lots of misinformation along the way from cockpit and crew. Definitely unimpressed with both union and management.

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