$341 Find Cheap Flights from San Diego to Portugal

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 Portugal departing on 12/2. 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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Cheap Flights from San Diego to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon1 stop$735
Porto
Porto1 stop$747
Faro
Faro3 stops$1,114
Funchal
Funchal1 stop$1,099
Ponta Delgada
Ponta Delgada2 stops$1,108
Lisbon
Lisbon1 stop$735
Porto
Porto1 stop$747
Faro
Faro3 stops$1,114
Funchal
Funchal1 stop$1,099
Ponta Delgada
Ponta Delgada2 stops$1,108

Book Cheap San Diego to Portugal Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Diego to Portugal 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 Portugal

Wed, Nov 11 - Wed, Nov 18
British Airways Logo
6:00 pm - 9:50 pm
SAN
-
LIS
19h 50m
1 stop
British Airways Logo
11:05 am - 9:39 pm
LIS
-
SAN
18h 34m
1 stop
$735British Airways
Tue, Oct 27 - Tue, Nov 3
Delta Logo
3:05 pm - 3:25 pm
SAN
-
OPO
17h 20m
1 stop
Delta Logo
5:00 am - 12:10 pm
OPO
-
SAN
15h 10m
1 stop
$747Delta
Wed, Nov 11 - Wed, Nov 18
British Airways Logo
6:00 pm - 5:40 pm
SAN
-
LIS
15h 40m
1 stop
British Airways Logo
11:05 am - 6:53 pm
LIS
-
SAN
15h 48m
1 stop
$749British Airways
Sun, Nov 1 - Wed, Nov 18
British Airways Logo
6:00 pm - 5:45 pm
SAN
-
LIS
15h 45m
1 stop
British Airways Logo
11:05 am - 9:39 pm
LIS
-
SAN
18h 34m
1 stop
$751British Airways
Sun, Dec 6 - Thu, Dec 10
United Airlines Logo
9:55 pm - 9:30 am
SAN
-
OPO
27h 35m
2 stops
United Airlines Logo
6:00 am - 9:57 pm
OPO
-
SAN
23h 57m
2 stops
$756United Airlines
Tue, Oct 27 - Tue, Nov 3
Delta Logo
6:20 am - 10:30 am
SAN
-
OPO
21h 10m
2 stops
Delta Logo
5:00 am - 6:27 pm
OPO
-
SAN
21h 27m
2 stops
$757Delta
Sun, Dec 6 - Thu, Dec 10
United Airlines Logo
7:00 am - 9:30 am
SAN
-
OPO
18h 30m
2 stops
United Airlines Logo
12:35 pm - 10:38 pm
OPO
-
SAN
18h 03m
1 stop
$765United Airlines
Tue, Oct 6 - Tue, Oct 20
Lufthansa Logo
5:15 pm - 11:25 pm
SAN
-
OPO
22h 10m
1 stop
Lufthansa Logo
6:20 am - 3:25 pm
OPO
-
SAN
17h 05m
1 stop
$775Lufthansa
Fri, Jul 3 - Mon, Jul 6
KLM Logo
3:51 pm - 9:05 pm
SAN
-
FAO
21h 14m
2 stops
KLM Logo
8:55 pm - 11:50 am
FAO
-
SAN
22h 55m
1 stop
$1,490KLM
Fri, Jul 3 - Mon, Jul 6
KLM Logo
5:01 pm - 9:05 pm
SAN
-
FAO
20h 04m
2 stops
KLM Logo
8:55 pm - 3:08 pm
FAO
-
SAN
26h 13m
2 stops
$1,500KLM
Booking Insights

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

Get data-powered insights and trends into flights from San Diego to Portugal 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 Portugal?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Diego to Portugal, 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 Portugal is December, when tickets cost $443 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $691 and $650 respectively.

How far in advance should I book a flight from San Diego to Portugal?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Diego to Portugal, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Diego to Portugal, you should book around 2 weeks before departure, which saves you about 5% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$341
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from San Diego to Lisbon

FAQs - booking Portugal flights

  • Can I fly with my pets from San Diego to Portugal?

    KLM allows pets up to 8 kg to fly inside the cabin; heavier pets can fly in the cargo. If you are flying with British Airways, your service dogs and emotional support dogs can travel with you inside the cabin free of cost.

  • What are kid-friendly flights from San Diego to Portugal?

    If you’re flying with children under the age of two, you should fly with American Airlines. They have a Kids Fly Free policy, in which kids under two years of age can fly free with a parent and be seated in their lap. The cabin includes infant seat belts, baby food, and bottle heating services.

  • What are possible layovers on my route from San Diego to Portugal?

    Most of the flights from San Diego to Portugal are one-stop flights. You will most likely have a layover at the London Heathrow (LHR) or Philadelphia (PHL) airports. Lounge access is available at these airports, depending on your airline. Both British Airways and American Airlines offer complimentary access to lounges for their business-class passengers.

  • Can I get vegan meals while flying from San Diego to Portugal?

    If you’re flying with KLM Airlines or British Airlines from San Diego to Lisbon Humberto Delgado (LIS), you can request vegan and dairy-free meals 24 hours prior to taking off or while booking your tickets. You can also opt for low-fat, low-sodium, or kid-friendly meals on your flight.

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

    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 Portugal.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from San Diego to Portugal 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 Portugal?

    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 from San Diego to Portugal with an airline and back with another airline.

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

    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 from San Diego to Portugal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Portugal

  • If you fly from San Diego to Portugal, you might arrive at Lisbon Humberto Delgado (LIS). This airport is the hub for TAP Air Portugal. Airlines frequently fly to Faro International Airport (FAO), Francisco Sá Carneiro Airport (OPO), and Santa Maria Airport (SMA). You can also book nonstop flights from Lisbon Airport to Madrid, Barcelona, and other Spanish destinations.
  • Those flying from San Diego to Lisbon Humberto Delgado (LIS) might want to book British Airways, which offers a one-stop flight. Your layover on this flight will be at Philadelphia Airport (PHL). During your layover, you can relax at the British Airways Galleries Club Lounge in Terminal A.
  • The cheapest flight from San Diego is with Delta Air Lines. It will take 13 hours to fly into Lisbon Airport (LIS) and has a layover at Minneapolis, St. Paul Airport (MSP). You can upgrade your ticket to premium economy for priority boarding and assisted airport transfers. You will also get extra legroom and a variety of snacks with a premium economy ticket.
  • KLM Airlines is the most sustainable airline on this route. It is dedicated to reducing the carbon footprint. They use low-emission fuel, lighter serving utensils, and seats made of more lightweight material to minimize the weight on board and help reduce fuel consumption.
  • You can also fly comfortably from San Diego to Lisbon Humberto Delgado (LIS) with Air France. This airline provides passengers with a pillow, blanket, and a USB charging port on every seat. You will also get free snacks and drinks on this flight.

Reviews of the top 5 airlines serving from San Diego to Portugal

 
Need help choosing which airline to fly with from San Diego to Portugal? 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.
7.9
DeltaOverall score based on 8403 reviews
8.5Crew
7.2Food
7.8Comfort
7.8Entertainment
8.1Boarding
Airline reviews

Flight delayed four separate times. I’m now one hour hours late to landing.

2.0 MediocreTravis, Jun 2026
SFO - LAX
Read more Delta reviews

Flight delayed four separate times. I’m now one hour hours late to landing.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Long story short, it was one of the better flight experiences I've had in some time when compared with other airlines.

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

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

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

As always, it’s a pleasure to travel with KLM. It is one of my favorite airlines.

Brand new plane lots of room the snack was very flavourful and enjoyable

There were no charge points for phones on the economy seats. The seats were comfortable overall. Food was okay.. flight was on time

It was really nice journey i personally recommend klm flight

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

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

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.

I was promised by United Airline (operated by ANA) that I will be seated together with my kids as I am the only adult flying with two minors. We did not get seats together in our 11 hours flight from LA to Tokyo. When asked at the gate, ANA representative said United Airline should have informed them that there is a parent flying with two minors. He said they can’t do anything in the system as the flight is full. He ask me to ask passengers next to me and the kids if they are willing to change seats. This is ridiculous! However, I went in the flight and asked other passages but no one willing to change seats. 11 hours and we were seating separately. I was very disappointed with this. It made things super inconvenient for me.

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

It was perfect! United Airlines staff was extremely caring, super friendly and professional

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.

United has maintenance issues and can then never recover. No operations ability and simple issues always turn into multiple hours long cascading delays. Worst airline on earth.

I paid for a confirmed upgraded aisle seat and was moved to a center seat in the back of the plane at the last minute.

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Flight attendants were fine, seats a bit hard but I use a cushion for extra support. The only issue was it was a bit too cool and I needed to ask for and received and extra blanket. I survived!!!

Very few things and/or people are excellent. It was very good.

Food choices limited & not enticing Seats quite uncomfortable & difficult to control

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

Boarding was disorganized. The door to one to the toilets wouldn’t lock. The plane was shockingly cramped, and clearly used for domestic flights due to the menus for items to sell domestic travelers. United should be ashamed of its small seats, tiny unclean toilets, and money grubbing stance toward services, compared to Lufthansa, Emirates, and most international carriers United is awful.

Terrible. Lost our luggage for 4 days. Did not advise passengers there was a strike in Barcelona Airport and had zero personnel on hand at airport to advise passengers on where to go to file claims. We had to fend for ourselves. No assistance at all other than an online claims submission process that we had to find out about on our own.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Late flight Delays Poor service Poor staff Worst airline ever

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.

Canceled flight late London to Florence. Help at airport very poor. Treated poorly. Had to sleep in the airport. Lost bags- still do not have them. Horrible. I should be reimbursed!

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

Flight delayed, connection was not at gate listed and so missed, staff were rude at Heathrow, phone tree stupid and difficult, took me 21 actual hours to reach my destination. Almost lost my hotel reservation after walking in a strange city alone after midnight because they would not put me up in a hotel at sfo or heathrow. I will never fly BA again and will tell all people and Instagram followers never to fly BA.

Check-in in SAN was long. ORD was good. Flight delayed On board crew was ok. No warmth or personality. LHrR barely made connection

Wish the food and overall service was better. They treat Business class passengers same as economy

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

Awful it always is unfortunately is the only way to fly direct to london

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

Information on your arrival and departure airports