$399 Find Cheap Flights from Portugal to San Diego

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to San Diego departing on 1/16. 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 San Diego

 
These are the airlines KAYAK users have selected most often from within our search results for flights to San Diego, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to San Diego, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$838
Overall average: $824
Scandinavian Airlines
Mon 1/19Mon 6/8
LIS - SAN • 2 stops
Cheapest one-way
$399
Typical prices: $800-$920
Multiple Airlines
Fri 1/16
LIS - SAN • 3 stops
When to travel
January
Cheapest • 12% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Diego!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portugal to San Diego

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

Mon, Jan 19 - Mon, Jun 8
Scandinavian Airlines Logo
4:55 pm - 10:47 pm
LIS
-
SAN
37h 52m2 stops
Scandinavian Airlines Logo
10:00 am - 9:00 am
SAN
-
LIS
39h 00m2 stops
$838Scandinavian Airlines
Mon, Jan 12 - Sun, Jan 25
Lufthansa Logo
3:55 pm - 5:28 pm
LIS
-
SAN
33h 33m2 stops
Lufthansa Logo
5:35 pm - 11:30 pm
SAN
-
LIS
21h 55m1 stop
$884Lufthansa
Mon, Jan 12 - Sun, Jan 25
Delta Logo
10:00 am - 10:31 pm
LIS
-
SAN
20h 31m2 stops
Delta Logo
6:15 am - 11:20 am
SAN
-
LIS
21h 05m2 stops
$885Delta
Mon, Jan 12 - Sun, Jan 25
Virgin Atlantic Logo
10:00 am - 12:05 am
LIS
-
SAN
22h 05m1 stop
Virgin Atlantic Logo
7:05 am - 8:00 am
SAN
-
LIS
16h 55m1 stop
$889Virgin Atlantic
Fri, Jan 16 - Mon, Jan 19
United Airlines Logo
5:00 am - 10:33 pm
LIS
-
SAN
25h 33m2 stops
United Airlines Logo
7:00 am - 8:10 am
SAN
-
LIS
17h 10m2 stops
$891United Airlines
Mon, Jan 12 - Sun, Jan 25
Scandinavian Airlines Logo
4:55 pm - 9:05 pm
LIS
-
SAN
36h 10m2 stops
Scandinavian Airlines Logo
7:05 am - 4:05 pm
SAN
-
LIS
25h 00m2 stops
$892Scandinavian Airlines
Mon, Jan 12 - Sun, Jan 25
United Airlines Logo
5:00 am - 10:33 pm
LIS
-
SAN
25h 33m2 stops
United Airlines Logo
7:00 am - 8:10 am
SAN
-
LIS
17h 10m1 stop
$897United Airlines
Fri, Jan 16 - Mon, Jan 19
American Airlines Logo
8:20 am - 10:26 pm
LIS
-
SAN
22h 06m2 stops
American Airlines Logo
6:00 pm - 9:55 pm
SAN
-
LIS
19h 55m1 stop
$903American Airlines
Fri, Jan 16 - Mon, Jan 19
American Airlines Logo
11:05 am - 10:58 pm
LIS
-
SAN
19h 53m1 stop
American Airlines Logo
6:00 pm - 9:55 pm
SAN
-
LIS
19h 55m1 stop
$905American Airlines
Mon, Jan 19 - Mon, Jun 8
British Airways Logo
11:05 am - 10:58 pm
LIS
-
SAN
19h 53m1 stop
British Airways Logo
4:45 pm - 11:10 pm
SAN
-
LIS
22h 25m1 stop
$906British Airways
Booking Insights

KAYAK's insights & trends for flights to San Diego

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

What is the cheapest month to fly to San Diego?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to San Diego, 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 to San Diego is February, where tickets cost $837 on average for one-way flights. On the other hand, the most expensive months are July and March, where the average cost of tickets from Portugal is $1,034 and $996 respectively. For return trips, the best month to travel is January with an average price of $824.

Good to know

Low seasonSeptember
Cheapest flight$399
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Lisbon to San Diego

FAQs - booking San Diego flights

  • How far is San Diego Airport from central San Diego?

    Central San Diego is 3 miles away from San Diego Airport.

  • What is the name of San Diego’s airport?

    When flying to San Diego, you'll arrive at San Diego Airport (SAN). The airport is also known as Lindbergh Field, San Diego, or San Diego Intl.

  • What is the cheapest day to fly to San Diego?

    Based on KAYAK data, the cheapest day to fly to San Diego is Saturday where tickets can be as cheap as $809. On the other hand, the most expensive day to fly is Sunday, where prices are $974 on average.

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

    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 to San Diego.

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

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

    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 San Diego 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 to San Diego?

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

  • What is the cheapest time of day to fly to San Diego?

    The cheapest time of day to fly to San Diego is generally in the morning, when flights cost $845 on average. The most expensive time of day to fly to San Diego is generally in the morning, which is peak travel time and where the average cost of a ticket is $845.

  • How many direct flights to San Diego are there each week?

    Each week there are around 3,253 direct flights from within Portugal to San Diego. The most common day for departures is Monday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to San Diego

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest San Diego flight deals.

Reviews of the top airlines flying from Portugal to San Diego

 
See real verified KAYAK customer reviews for airlines flying to San Diego. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Portugal to San Diego. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to San Diego? 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.
7.4
United AirlinesOverall score based on 9093 reviews
7.7Boarding
7.1Entertainment
8.1Crew
7.3Comfort
6.6Food
Airline reviews

Movie selection is good. Crew did not understand mileage program and were no help. Sick later. Food?

6.0 GoodSue, Dec 2025
SJO - SFO
Read more United Airlines reviews

Movie selection is good. Crew did not understand mileage program and were no help. Sick later. Food?

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

The flight attendants were very rude, beyond comprehension. I took a business class from London to SFO for the first time on United. When I asked for a second piece of bread during dinner, the serving attendant threw a 3rd bread on my plate and said, “here. You can have this one too”! I couldn’t believe the rudeness of the attendant. Most all attendants were very rude, unhelpful, sing the food was absolutely disgusting. Never fly United internationally in business class. My flight back to SFO was a nightmare!!

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Flight from Rome to SFO was excellent compared To our flight to Europe from SFO. The food was much tastier. You can see how UNITED is skimping, though. Instead of getting something mid flight you had to ask for it. It was not automatically served. There was a cookie at the end of the arrival meal, for example that tasted like it just came out of a box. They used to serve a little container of nuts, now … a tiny container of nuts, mixed with pretzels. This was business class that you really have to pay for! But this is minor complaints compared to the overall. My major complaint is the position of the even numbered seats by the windows. You have to turn around to see your window & the positioning as some other controls are harder to get at. This is compared to the odd number seat that are perfectly aligned.

The food quality sucks. One must starve if they do not eat flesh Or wheat based products Some variety would be expected. The trivial amount of snacks and or food is inhumane

Flight was timely, relatively comfortable, with decent entertainment and food served. Only problem encountered was with the free messaging which I highly appreciate, but it did not work from iphone to non-iphones.

The internet service I paid for didn’t work at all and the flight crew was not very friendly.

Subject: Formal Complaint: Discriminatory and Unprofessional Conduct – Request for Immediate Action & Compensation Dear [Airline Customer Relations Team], I am writing to file a formal complaint regarding my recent travel experience with [Airline], which was by far the worst I have ever encountered. What occurred was not only unprofessional, but in several instances discriminatory, unsafe, and unacceptable. On the first leg of my trip, I arrived only four minutes past check-in. Instead of making any attempt to resolve the matter, your representative flatly denied me boarding and made me wait while she attended to passengers who arrived after me. By the time a manager intervened, it was too late to board, costing me time, money, and unnecessary frustration. The second leg of my trip (Chicago–San Francisco) raised even more serious concerns. From the outset, it was apparent that the staff—particularly two attendants—prioritized Caucasian passengers while dismissing African American and minority passengers. • When a Caucasian passenger in the exit row refused to comply with federal safety requirements, I, as a first responder, immediately offered to switch seats and assume the responsibility. My offer was blatantly ignored, and instead, a Caucasian passenger seated further up was chosen. This was discriminatory and deeply insulting, especially as I was actively de-escalating the situation that could have delayed the flight further. • During a lengthy tarmac delay of over 90 minutes, passengers were given conflicting and unreasonable instructions that created unnecessary distress and tension. • Throughout the flight, a visibly intoxicated passenger directly in front of me was disruptive, rude to others, failed to comply with seatbelt and electronic device rules, and yet faced no enforcement from the crew. In stark contrast, I was singled out for repeated compliance checks even though I was following every rule. This unequal treatment was so obvious that multiple passengers around me spoke up in my defense. This pattern of behavior demonstrated a clear lack of professionalism, disregard for passenger safety, and discriminatory treatment. I expect far better from an airline of your stature. As a paying customer subjected to this unacceptable treatment, I am formally requesting: 1. A full investigation into the conduct of the staff on both flights. 2. A written apology acknowledging the discriminatory and unprofessional behavior I endured. 3. Appropriate compensation for the distress, inconvenience, and mishandling of my travel. If this matter is not addressed promptly and thoroughly, I will have no choice but to escalate my complaint further, including filing with the U.S. Department of Transportation and sharing my experience through other channels. I trust [Airline] will take this complaint seriously and provide a timely resolution.

Audi visual not working for a whole group of seats in first class. How does a plane leave the main hub in such poor condition? How much that we can’t see so immediately is also compromised?

main meals are horrible but then you dont fly for the food

It was good. Couldn’t Check in online and select seats

It was great. Enough space and room for legs . Great service to.

⭐ British Airways Review — A Journey of Highs, Lows, and Lessons ⭐ I recently flew Business Class round-trip from Boston to Mumbai with British Airways, and my experience was a tale of two extremes — from disappointment to exceptional service, and then back to inconsistency. Boston → London: A Surprisingly Poor Start My journey began on a disappointing note. On a 6-hour Business Class flight, I was surprised to discover that there wasn’t a single proper vegetarian meal option available. I was offered a few bakery items only after repeatedly requesting something to eat. The flight attendant shrugged, offered no solution, and eventually — quite literally — threw some bread at me after much delay. This was not only disheartening, it was extremely surprising given my wonderful Business Class experience with BA last year. I stepped off that flight genuinely hungry and had to make a mad dash to the lounge just to get a proper meal. London → Mumbai: A Complete Turnaround The next sector restored my faith in British Airways. The entire crew was warm, welcoming, attentive, and genuinely caring. A special shoutout to Phiroze and the entire team serving the Business Class cabin — their professionalism, hospitality, and thoughtful service were extraordinary. They truly embodied what makes British Airways a global leader, and I am deeply grateful for the experience they provided. This is the BA I know and love. Mumbai → London: A Strange Meal Schedule This sector was generally fine, but the meal timing was puzzling. Lunch at 10:30 AM — for a Business cabin — felt unusual, and most passengers, including myself, barely touched it. The rest of the service was smooth, but the scheduling definitely needs a rethink. London → Boston: Mixed Experience Again The flight itself was decent, but the Business Lounge at Heathrow for this leg was a letdown. Arrived during lunch hours: no hot vegetarian options available Lounge area: dirty dishes everywhere Even after politely alerting the staff, the dishes were ignored and left uncleared For a premium cabin passenger — and at one of the world’s busiest international hubs — this was disappointing. Overall Impression My journey with British Airways felt inconsistent — two great sectors sandwiched between two that fell short of the BA standard. When BA is good, it is world-class. When it misses, the gap is noticeable. I genuinely hope the airline takes this feedback as constructive insight. I continue to believe in British Airways, and I commend the outstanding crew on the London → Mumbai sector — they were the highlight of my entire trip. With a little more focus on vegetarian meal availability, lounge service, and consistency across crews, BA can ensure every Business Class passenger experiences the premium journey they promise.

We were in business class and I had seat # 1. This was a night flight and after dinner was served, lights were dimmed and I went to sleep. The crew were loud and noisy so I didn’t get much sleep. I expect the crew to enjoy themselves but would Appreciate some decency in staying quiet while the passengers sleep

Have travelled business class with other airlines who profess to be the best in the world. They can however not beat the service and comfort that BA provide.

Well unfortunately our connecting was cancelled and next flight delayed. Was in airport 9 hours. Flight itself was good. I’m sure it was a FAA problem.

Great on board entertainment Tasty food Cattle class obviously crammed but not as bad as shorter hall flights

I was attacked in the Miami airport and the staff did nothing. On my flight from London to Miami one of the flight attendants screamed at me and demanded I keep my seat in the upright position at all times during the fight so the man behind me was comfortable for the flight. I will never in my life use British airways again

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