$349 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 10/12. 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

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

Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

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$790
Porto
Porto2 stops$777
Faro
Faro2 stops$888
Funchal
Funchal2 stops$1,171
Ponta Delgada
Ponta Delgada1 stop$1,017
Lisbon
Lisbon1 stop$790
Porto
Porto2 stops$777
Faro
Faro2 stops$888
Funchal
Funchal2 stops$1,171
Ponta Delgada
Ponta Delgada1 stop$1,017

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

Tue, Sep 22 - Tue, Oct 6
Delta Logo
3:59 pm - 10:05 pm
SAN
-
OPO
22h 06m
2 stops
Delta Logo
5:00 am - 11:50 am
OPO
-
SAN
14h 50m
1 stop
$777Delta
Mon, Sep 28 - Tue, Oct 13
United Airlines Logo
10:20 pm - 7:00 am
SAN
-
OPO
24h 40m
2 stops
United Airlines Logo
12:15 pm - 8:29 pm
OPO
-
SAN
40h 14m
2 stops
$778United Airlines
Mon, Sep 28 - Tue, Oct 13
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
$779Lufthansa
Tue, Sep 22 - Tue, Oct 6
Delta Logo
1:40 pm - 10:15 pm
SAN
-
OPO
24h 35m
1 stop
Delta Logo
5:00 am - 11:50 am
OPO
-
SAN
14h 50m
1 stop
$782Delta
Mon, Oct 19 - Fri, Oct 30
British Airways Logo
7:40 pm - 11:10 pm
SAN
-
LIS
19h 30m
1 stop
British Airways Logo
11:05 am - 10:24 pm
LIS
-
SAN
18h 19m
1 stop
$790British Airways
Mon, Oct 19 - Fri, Oct 30
British Airways Logo
4:45 pm - 11:10 pm
SAN
-
LIS
22h 25m
1 stop
British Airways Logo
11:05 am - 8:39 pm
LIS
-
SAN
16h 34m
1 stop
$791British Airways
Mon, Oct 5 - Sun, Oct 11
KLM Logo
1:30 pm - 5:25 pm
SAN
-
FAO
19h 55m
2 stops
KLM Logo
6:55 pm - 6:46 pm
FAO
-
SAN
31h 51m
2 stops
$892KLM
Wed, Jun 3 - Tue, Jun 9
United Airlines Logo
6:35 am - 9:50 am
SAN
-
FAO
19h 15m
2 stops
United Airlines Logo
11:40 am - 11:40 pm
FAO
-
SAN
20h 00m
1 stop
$1,080United Airlines
Wed, Jun 3 - Mon, Jun 8
KLM Logo
1:37 pm - 7:30 pm
SAN
-
FAO
21h 53m
2 stops
KLM Logo
9:45 pm - 11:50 am
FAO
-
SAN
22h 05m
1 stop
$1,083KLM
Mon, Sep 21 - Mon, Sep 28
Lufthansa Logo
6:35 am - 9:10 am
SAN
-
FAO
18h 35m
1 stop
Lufthansa Logo
3:55 pm - 3:25 pm
FAO
-
SAN
31h 30m
1 stop
$1,103Lufthansa
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 22% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$349
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly with an average 30% increase in price.
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 8467 reviews
7.8Entertainment
8.1Boarding
7.9Comfort
7.2Food
8.5Crew
Airline reviews

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!

10.0 ExcellentTeresa, Apr 2026
SMF - LAX
Read more Delta reviews

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.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

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

The flight was delayed. The aircraft was unclean. Promised seat was not given due to change in Aircraft. Not one crew on ground was in a position to give any response. Amsterdam Airport is AVIODABLE Over crowded. Over Expensive. Poor Services.

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.

Couldn’t get boarding pass in SLC even with help from a redcoat, so had to find a desk in AMS to get boarding pass. Technical problems so not sure why. Very inconvenient. The KLM app is not as user friendly as most apps. Also had to wait almost an hour on the tarmac for a fuel truck, which caused us to miss a connecting bus in LUX.

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

Due to cancellation of connecting flight (Lufthansa) I didn’t fly with United

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

It was perfect! I've never flown with United before, but I definitely will in the future

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.

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

Everything was really great just The aircraft was too old and sounded it will break during takeoff

Extremely pleased with the crew. Best flight attendants ever! Very friendly, genuinely caring and attentive.

Best flight attendants ever! Very customer and service oriented, courteous, professional and helpful.

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

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

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

Information on your arrival and departure airports