$329 Find Cheap Flights from Porto to California

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Porto to California departing on 1/18. 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 California

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto to California, 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 Porto to California, as well as popular online travel agencies
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Cheap Flights from Porto to California

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Los Angeles
Los Angeles1 stop$552
San Francisco
San Francisco1 stop$615
Sacramento
Sacramento2 stops$2,093
Los Angeles
Los Angeles1 stop$552
San Francisco
San Francisco1 stop$615
Sacramento
Sacramento2 stops$2,093

Book Cheap Porto to California Plane Tickets

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

Thu, Jan 15 - Thu, Jan 29
Multiple Airlines Logo
8:45 am - 7:10 pmOPO-LAX
18h 25m1 stop
Multiple Airlines Logo
7:55 pm - 7:15 amLAX-OPO
27h 20m1 stop
$552Multiple Airlines
Find Deal
Thu, Jan 15 - Thu, Jan 29
Multiple Airlines Logo
7:00 am - 7:10 pmOPO-LAX
20h 10m2 stops
Multiple Airlines Logo
7:55 pm - 7:15 amLAX-OPO
27h 20m1 stop
$590Multiple Airlines
Find Deal
Thu, Jan 15 - Thu, Jan 29
TAP AIR PORTUGAL Logo
7:00 am - 2:40 pmOPO-LAX
15h 40m1 stop
TAP AIR PORTUGAL Logo
4:45 pm - 3:00 pmLAX-OPO
14h 15m1 stop
$591TAP AIR PORTUGAL
Find Deal
Thu, Jan 15 - Wed, Jan 28
TAP AIR PORTUGAL Logo
6:00 pm - 4:05 pmOPO-SFO
30h 05m1 stop
TAP AIR PORTUGAL Logo
4:35 pm - 11:00 amSFO-OPO
34h 25m1 stop
$615TAP AIR PORTUGAL
Find Deal
Fri, May 15 - Mon, May 18
American Airlines Logo
12:25 pm - 9:34 amOPO-SFO
29h 09m2 stops
American Airlines Logo
4:35 pm - 8:00 pmSFO-OPO
19h 25m2 stops
$638American Airlines
Find Deal
Thu, Jan 15 - Wed, Jan 28
British Airways Logo
12:25 pm - 12:47 amOPO-SFO
20h 22m2 stops
British Airways Logo
11:48 am - 4:45 pmSFO-OPO
20h 57m2 stops
$651British Airways
Find Deal
Wed, Jan 21 - Sun, Jan 25
American Airlines Logo
8:20 am - 12:47 amOPO-SFO
24h 27m2 stops
American Airlines Logo
6:00 am - 11:45 amSFO-OPO
21h 45m2 stops
$652American Airlines
Find Deal
Thu, Jan 15 - Wed, Jan 28
British Airways Logo
5:35 pm - 3:00 pmOPO-SFO
29h 25m1 stop
British Airways Logo
10:30 pm - 5:15 pmSFO-OPO
34h 45m2 stops
$679British Airways
Find Deal
Thu, Jan 15 - Wed, Jan 28
Lufthansa Logo
6:00 am - 3:55 pmOPO-SFO
17h 55m1 stop
Lufthansa Logo
1:30 pm - 1:15 pmSFO-OPO
15h 45m1 stop
$690Lufthansa
Find Deal
Thu, Jan 15 - Sat, Jan 31
Lufthansa Logo
6:00 am - 8:52 pmOPO-LAS
22h 52m2 stops
Lufthansa Logo
7:15 am - 12:50 pmLAS-OPO
21h 35m2 stops
$853Lufthansa
Find Deal
Booking Insights

KAYAK's insights & trends for Porto to California flights

Get data-powered insights and trends into flights from Porto to California to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Porto to California?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Porto to California, 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 Porto to California is February, when tickets cost $725 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of round-trip tickets is $927 and $920 respectively.

What’s the cheapest day of the week to fly from Porto to California?

The average price of all round-trip flights from Porto to California clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to California on a Tuesday and more expensive on a Friday. On your return trip to Porto, you should consider flying back on a Wednesday, and avoid Fridays for better deals.

How far in advance should I book a flight from Porto to California?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Porto to California, 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 Porto to California, you should book around 2 weeks before departure, which saves you about 13% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonOctober
Cheapest flight$329
Best time to beat the crowds but there is an average 15% increase in price.
Most popular time to fly with an average 6% increase in price.
Flight from Porto to Las Vegas

FAQs - booking California flights

  • How does KAYAK find such low prices on flights from Porto to California?

    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 Porto to California.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Porto to California 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 Porto to California?

    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 Porto to California 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 Porto to California?

    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 Porto to California 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 California?

    The cheapest time of day to fly to California is generally in the evening, when round-trip flights cost $802 on average. Morning departures are around 7% more expensive than evening flights, on average. The most expensive time of day to fly to California is generally in the morning, which is peak travel time and where the average cost of a ticket is $857.

Reviews of the top airlines flying from Porto to California

 
See real verified KAYAK customer reviews for airlines flying from Porto to California. 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 Porto to California? 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.
7.1
TAP AIR PORTUGALOverall score based on 2073 reviews
6.3Entertainment
6.2Food
7.1Comfort
7.0Boarding
7.8Crew
Airline reviews

Wonderful just hope the had more direct flights to Boston

10.0 ExcellentAnonymous, Nov 2025OPO - LIS
Read more TAP AIR PORTUGAL reviews

Wonderful just hope the had more direct flights to Boston

Boarding process was fast and efficient. Short flight but on time and well organized. I would certainly fly TAP again.

Very long line at the gate, moved slowly. I had expected that boarding a flagship A330neo would be with a jetway directly at the gate, and not a long bus ride to the airplane.

The layover was only one hour and a huge line for passport control. If I didn’t cut the line and argue was every single official, I would’ve spent the night in this one. Obviously.TAP AIR people. do not take into account.this problem with their flight scheduling, which is extremely frustrating. Poor food choices, on the pasta was offered, they ran out of chicken right away. All the sodas and water poured in a tiny 70 mL cups, which is not enough to keep hydrated on the long flight. I had to ask for 34 cups at a time. Flight attendant seemed to be tired and overworked.

Very borderline, low budget airline without low budget prices There are no counts of soda, everything is dispensed enlarged bottles and poured into tiny cups about 70 mL so in order to keep hydrated you have to take 3-4 cups at a time. Also, there was only one food item offered, pasta, they ran out of chicken right away. Snack was very poor. It was called tuna sandwich, which is truly borderline. The flight attend attendance seemed to be overworked and tired.

I am not very tall, and had a difficult time getting my carry-on placed in the overhead bin while passengers were behind me waiting to get to their seats. After struggling with the luggage, I turned it around, and left it, knowing it was not properly placed, but believing there was adequate room for it in the bin. When the flight attendant came through the cabin, she asked whose bag it was, and scolded me for not positioning it correctly. She turned it around and moved on. I thought that her approach was totally unprofessional, calling out a passenger in that manner.

TAP‘s flight attendants seem to be among the least ambitious of all the international flight crews we’ve flown with. . When we left US and went to Portugal, and when we returned from Portugal, flight attendants were not very visible. Then did not offer frequent water breaks and when we had to go back to request water, I was almost an imposition. Meal quality was just average. The dinners were fine. Breakfast wraps were presented soggy.

There was no warning that they have added passport control after check in, the line was enormous and after 46 mins wait we missed our flight. Were forced to leave the airport and purchase new tickets at full price to board a later flight. TAP were unsympathetic and unhelpful.

Boarding we were jammed into a hot crowded bus waiting too long while another bus went in front of us. Appreciated blanket and pillow, movie available helped time pass, the food was not appealing so I had my own snacks, the flight is long, but nothing they can do about that. Staff adequate, flight good.

Did not enjoy the meal provided. The aircraft was dirty. For instance, the screen seemed to have been cleaned with a dirty rag. Disgusting.

Had a few open seats and could use it for a great rest ful journey

It was very good. Service was friendly and efficient, and food was good.

Airline food is airline food, but the plane was wonderful and the seating comfort outstanding. One of my best flights in quite a while.

Crew was outstanding, helpful and friendly. Food is deteriorating. The snack at the end of the flight was not good, a greasy moosh of toast cheese snd other unidentifiable ingredients. Coming from Germany a pretzl with butter would have been better. Entertainment had a great selection.

Smooth flight with enough time for connection. Ran out of meal options. In-flight and gate staff were friendly and helpful. Good service overall.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

Give yourself over 2+ hours layover because if flight is slighlty delayed and you miss your connection, Lufthansa will do nothing for you

We would have missed our connection from Munich to Boston but we had a van outside the plan that wisked us to our terminal. Much appreciated and we didn’t even realize that Lufthansa had done this until the announcement on disembarkation. Well organized airline! Will definitely fly Lufthansa again!!!

Everything went well. I will fly with Lufthansa again. And use Kayak whenever I book flights

Everything you need to know for your flight from Porto to California

Information on your arrival and departure airports