OPO - SFO
$388 Find Cheap Flights from Porto to San Francisco - Compare and Save
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 San Francisco departing on 12/14. 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.
Everything you should know
Cheapest round-trip
$555
Typical prices: $731-$967
Scandinavian Airlines
Mon 11/19Mon 11/26
OPO - SFO • 1 stop
Cheapest one-way
$388
Typical prices: $627-$941
Multiple Airlines
Fri 12/14
OPO - SFO • 2 stops
Cheap Flights from Porto to San Francisco (OPO-SFO)
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Porto to San Francisco 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.
Cheap flights from Porto to San Francisco with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.
Thu, Nov 19 - Thu, Nov 26
5:55 pm - 2:50 pmOPO Porto-SFO San Francisco
28h 55m1 stop Kastrup Copenhagen
4:45 pm - 4:55 pmSFO San Francisco-OPO Porto
16h 10m1 stop Kastrup Copenhagen
$555Scandinavian Airlines
Mon, Feb 15 - Mon, Feb 22
11:55 am - 10:57 pmOPO Porto-SFO San Francisco
43h 02m2 stops Kastrup Copenhagen New York John F Kennedy Intl
4:45 pm - 11:05 amSFO San Francisco-OPO Porto
34h 20m1 stop Kastrup Copenhagen
$642Scandinavian Airlines
Mon, Mar 1 - Thu, Apr 8
11:55 am - 3:08 pmOPO Porto-SFO San Francisco
59h 13m2 stops Kastrup Copenhagen Los Angeles
4:45 pm - 8:40 amSFO San Francisco-OPO Porto
31h 55m1 stop Kastrup Copenhagen
$648Scandinavian Airlines
Thu, Nov 19 - Thu, Nov 26
5:55 pm - 9:23 pmOPO Porto-SFO San Francisco
35h 28m2 stops Kastrup Copenhagen Los Angeles
4:45 pm - 4:55 pmSFO San Francisco-OPO Porto
16h 10m1 stop Kastrup Copenhagen
$650Scandinavian Airlines
Mon, Mar 1 - Thu, Apr 8
11:55 am - 3:08 pmOPO Porto-SFO San Francisco
59h 13m2 stops Kastrup Copenhagen Los Angeles
4:45 pm - 8:40 amSFO San Francisco-OPO Porto
31h 55m1 stop Kastrup Copenhagen
$651Scandinavian Airlines
Mon, Mar 1 - Thu, Apr 8
11:55 am - 3:08 pmOPO Porto-SFO San Francisco
59h 13m2 stops Kastrup Copenhagen Los Angeles
4:45 pm - 8:40 amSFO San Francisco-OPO Porto
31h 55m1 stop Kastrup Copenhagen
$652Scandinavian Airlines
Mon, Mar 1 - Thu, Apr 8
11:55 am - 1:29 pmOPO Porto-SFO San Francisco
57h 34m2 stops Kastrup Copenhagen Los Angeles
4:45 pm - 8:40 amSFO San Francisco-OPO Porto
31h 55m1 stop Kastrup Copenhagen
$692Scandinavian Airlines
Thu, Nov 19 - Mon, Nov 23
5:55 pm - 2:50 pmOPO Porto-SFO San Francisco
28h 55m1 stop Kastrup Copenhagen
4:45 pm - 10:00 pmSFO San Francisco-OPO Porto
21h 15m2 stops Kastrup Copenhagen Paris Charles de Gaulle
$762Scandinavian Airlines
Mon, Feb 15 - Mon, Feb 22
7:00 am - 2:25 pmOPO Porto-SFO San Francisco
15h 25m1 stop Lisbon Humberto Delgado
4:35 pm - 3:00 pmSFO San Francisco-OPO Porto
14h 25m1 stop Lisbon Humberto Delgado
$767TAP AIR PORTUGAL
Sun, Jan 24 - Wed, Feb 10
7:35 pm - 2:25 pmOPO Porto-SFO San Francisco
26h 50m2 stops Barcelona-El Prat Lisbon Humberto Delgado
7:25 pm - 11:15 amSFO San Francisco-OPO Porto
31h 50m1 stop Zurich
$768Multiple Airlines
Mon, Dec 14
10:05 pm - 2:45 pmOPO Porto-SFO San Francisco
48h 40m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$388Multiple Airlines
Sat, Jan 16
7:45 am - 9:27 pmOPO Porto-SFO San Francisco
45h 42m3 stops Charleroi Brussels Casablanca Mohamed V Los Angeles
$395Multiple Airlines
Mon, Jan 11
7:05 am - 9:27 pmOPO Porto-SFO San Francisco
46h 22m3 stops Charleroi Brussels Casablanca Mohamed V Los Angeles
$404Multiple Airlines
Mon, Dec 14
10:25 pm - 2:45 pmOPO Porto-SFO San Francisco
48h 20m3 stops Manchester Barcelona-El Prat Lisbon Humberto Delgado
$420Multiple Airlines
Sat, Nov 7
10:05 pm - 2:25 pmOPO Porto-SFO San Francisco
48h 20m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$425Multiple Airlines
Wed, Jan 13
6:00 am - 4:44 pmOPO Porto-SFO San Francisco
42h 44m3 stops Paris Beauvais-Tille Calgary Phoenix Sky Harbor Intl
$427Multiple Airlines
Mon, Nov 16
7:05 am - 8:32 pmOPO Porto-SFO San Francisco
45h 27m3 stops Charleroi Brussels Casablanca Mohamed V Los Angeles
$428Multiple Airlines
Thu, Nov 19
6:05 am - 4:05 pmOPO Porto-SFO San Francisco
42h 00m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$431Multiple Airlines
Sun, Nov 8
8:10 am - 2:25 pmOPO Porto-SFO San Francisco
38h 15m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$435Multiple Airlines
Mon, Nov 9
10:05 pm - 2:45 pmOPO Porto-SFO San Francisco
48h 40m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$436Multiple Airlines
Sun, Oct 11 - Sun, Oct 18
5:55 am - 5:15 pmOPO Porto-SFO San Francisco
19h 20m2 stops Paris Charles de Gaulle Minneapolis St Paul
12:05 pm - 3:30 pmSFO San Francisco-OPO Porto
19h 25m2 stops Los Angeles Paris Charles de Gaulle
$941Delta
Sun, Oct 11 - Sun, Oct 18
5:55 am - 5:15 pmOPO Porto-SFO San Francisco
19h 20m2 stops Paris Charles de Gaulle Minneapolis St Paul
7:00 am - 10:25 amSFO San Francisco-OPO Porto
19h 25m1 stop New York John F Kennedy Intl
$944Delta
Sun, Oct 11 - Sun, Oct 18
8:40 am - 4:15 pmOPO Porto-SFO San Francisco
15h 35m1 stop Zurich
7:35 pm - 6:15 pmSFO San Francisco-OPO Porto
14h 40m1 stop Zurich
$1,104SWISS
Sun, Oct 11 - Sun, Oct 18
1:55 pm - 1:15 pmOPO Porto-SFO San Francisco
31h 20m3 stops Barcelona-El Prat Palermo Punta Raisi Rome Fiumicino
8:10 am - 1:15 pmSFO San Francisco-OPO Porto
21h 05m2 stops Montreal Pierre Elliott Trudeau Intl Palma de Mallorca Son Sant Joan
$1,514Multiple Airlines
Mon, Oct 12 - Wed, Oct 14
6:00 am - 11:20 pmOPO Porto-SFO San Francisco
25h 20m2 stops Frankfurt am Main Vancouver Intl
8:10 am - 7:00 amSFO San Francisco-OPO Porto
14h 50m1 stop Montreal Pierre Elliott Trudeau Intl
$6,266Multiple Airlines
Mon, Oct 12 - Wed, Oct 14
6:00 am - 11:20 pmOPO Porto-SFO San Francisco
25h 20m2 stops Frankfurt am Main Vancouver Intl
12:15 pm - 6:30 pmSFO San Francisco-OPO Porto
22h 15m2 stops Vancouver Intl Zurich
$6,280Multiple Airlines
Mon, Oct 12 - Wed, Oct 14
4:35 pm - 7:50 pmOPO Porto-SFO San Francisco
35h 15m1 stop Frankfurt am Main
8:10 am - 7:00 amSFO San Francisco-OPO Porto
14h 50m1 stop Montreal Pierre Elliott Trudeau Intl
$6,298Multiple Airlines
Price, demand and travel trends for Porto to San Francisco flights
Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.
Prices
Airlines
Layovers
How much is a round-trip flight from Porto to San Francisco?
This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Porto to San Francisco departing in november.What's the cheapest day of the week to fly from Porto to San Francisco?
Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from Porto to San Francisco. It’s 15% cheaper than the average day, while Monday is the most expensive, with prices 30% higher.
What’s the cheapest month to fly from Porto to San Francisco?
KAYAK internal proprietary data takes all prices for each month over the last 12 months for round-trip flights from Porto to San Francisco, removes the top 0.1% to account for outliers and then takes the median of all values for each month.•January is the cheapest month to fly from Porto to San Francisco at $704 round-trip.
•June ($1,154) and July ($1,016) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 63% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.
Round-trip flights from Porto to San Francisco typically range from $731 to $967. The lowest price found in the past 5 days was $555, on Scandinavian Airlines.
What’s the most popular layover airport when flying from Porto to San Francisco?
KAYAK data for 1-stop round-trips over the past 3 months. Only counts itineraries with the same layover on both legs.Lisbon Humberto Delgado (LIS) is the most popular layover for the Porto to San Francisco route. 34% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via LIS.
What is the cheapest layover airport when flying from Porto to San Francisco?
Flights via Kastrup Copenhagen (CPH) offer the most affordable fares, with an average round-trip price of $508. Based on KAYAK data over the past 3 months.
Key details for Porto to San Francisco flights
Low season | June |
|---|---|
High season | September |
Cheapest flight | $388 |
When to book flights from Porto to San Francisco
Are your dates flexible? Find out the best times to travel from Porto to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.
Your Porto to San Francisco flight questions, answered
Find helpful answers about this route, including flight times, airports, airlines and booking tips.
Your guide to booking Porto to San Francisco flights
Get tips on when to book, when to fly and what to know before your trip.More options for your flight from Porto to San Francisco
Complete your trip to San Francisco with a hotel stay or car rental
Information on your arrival and departure airports
Cabin class types available on flights from Porto to San Francisco
Cabin classes available on flights from Porto to San Francisco. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
Find direct flights to and from Porto and San Francisco
Flights from domestic origins to San Francisco
More flights to San Francisco. Prices are the lowest found on KAYAK in the last 7 days. Price and availability is not guaranteed.
Flights to other popular destinations
The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.