$318 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 9/12. 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

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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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

Thu, Jul 24 - Fri, Aug 8
British Airways Logo
11:05 am - 8:03 pmLIS-SAN
16h 58m1 stop
British Airways Logo
4:40 pm - 11:10 pmSAN-LIS
22h 30m1 stop
$917British Airways
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Thu, Jul 24 - Tue, Aug 12
Iberia Logo
11:05 am - 8:03 pmLIS-SAN
16h 58m1 stop
Iberia Logo
2:48 pm - 4:05 pmSAN-LIS
17h 17m2 stops
$942Iberia
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Thu, Jul 24 - Tue, Aug 12
American Airlines Logo
11:05 am - 8:03 pmLIS-SAN
16h 58m1 stop
American Airlines Logo
4:40 pm - 11:00 pmSAN-LIS
22h 20m1 stop
$967American Airlines
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Thu, Jul 24 - Tue, Aug 12
Finnair Logo
6:35 am - 11:27 pmLIS-SAN
24h 52m2 stops
Finnair Logo
1:08 pm - 11:00 pmSAN-LIS
25h 52m2 stops
$978Finnair
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Thu, Jul 24 - Tue, Aug 12
Iberia Logo
11:05 am - 8:03 pmLIS-SAN
16h 58m1 stop
Iberia Logo
1:52 pm - 4:05 pmSAN-LIS
18h 13m2 stops
$988Iberia
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Thu, Jul 24 - Fri, Aug 8
Delta Logo
5:00 am - 12:00 pmLIS-SAN
15h 00m1 stop
Delta Logo
1:45 pm - 5:50 pmSAN-LIS
20h 05m2 stops
$991Delta
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Thu, Jul 24 - Fri, Aug 8
Delta Logo
5:00 am - 12:00 pmLIS-SAN
15h 00m1 stop
Delta Logo
1:45 pm - 5:50 pmSAN-LIS
20h 05m2 stops
$992Delta
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Fri, Jul 25 - Tue, Aug 12
 Logo
10:00 am - 11:42 pmLIS-SAN
21h 42m1 stop
 Logo
1:55 pm - 10:55 amSAN-LIS
37h 00m1 stop
$1,021
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Thu, Jul 24 - Thu, Aug 14
American Airlines Logo
11:05 am - 9:47 pmLIS-SAN
18h 42m2 stops
American Airlines Logo
6:15 am - 9:05 amSAN-LIS
18h 50m2 stops
$1,098American Airlines
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Sun, Jul 27 - Sun, Aug 3
 Logo
5:30 pm - 7:52 pmLIS-SAN
34h 22m1 stop
 Logo
10:48 am - 10:40 amSAN-LIS
15h 52m1 stop
$3,777
Find Deal
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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 November, where tickets cost $827 on average for return flights. On the other hand, the most expensive months are July and August, where the average cost of tickets from Portugal is $1,171 and $1,035 respectively. For one-way flights, the best month to travel is November with an average price of $827.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to San Diego, 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, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.


Good to know

Low seasonMarch
High seasonAugust
Cheapest flight$318
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 10% 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 Tuesday where round-trip tickets can be as cheap as $818. On the other hand, the most expensive day to fly is Sunday, where round-trip 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 round-trip 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 2,201 direct flights from within Portugal to San Diego. The most common day for departures is Friday, 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.

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 8801 reviews
8.1Crew
7.0Entertainment
7.3Comfort
6.6Food
7.7Boarding
Airline reviews

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

8.0 ExcellentLawrence, Jun 2025HNL - SFO
Read more United Airlines reviews

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

Its good expeince but in enternteiment please be like you tube the music i like or movie

I needed to make changes to my flights. When I called customer service, they assisted me with care professionalism.

A bit rush for transit. Food and entertainment are not available

Wonderful and fast TSA checkpoint. The line was fast and our gate was close by

The gate was too far away for the connecting flight

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

The first class seats were unusable, mine at the end of the flight, my husband's in the middle of the flight, and the one next to me was unusable either, they had to move the person to another seat.

Last minute gate change. Didn’t put our TSA global on our trip even though we asked multiple times to confirm. Did not help with food when could not eat what was served.

Our luggage didn’t arrive with us, that puts a damper on the whole trip.

The cabin was bit colder than I like but the crew members looked after us very well. They did even offer hot water bottle and hot chocolate. I cannot rate the crew enough excellent is not good enough. They really were wonderful.

Boarding is always a challenge as folks in al groups crowd around for no reason, but crew handled it well. I once again applaud the LHR ground baggage staff as they got our bags from a flight at Terminal 5A to a flight in Terminal 5C within 40 minutes...amazing!

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Push back is not working when I complaint a male staff he told me that most of the seats are like that so we can’t do anything

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

Was 3 hrs delayed and my poor friend I met in Barcelona was waiting at airport for 3 hrs. Dallas airport was awful

Everything you need to know for your flight to San Diego

Information on the airport you'll fly into in San Diego

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